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[groff] 04/10: PROBLEMS: Resequence file.


From: G. Branden Robinson
Subject: [groff] 04/10: PROBLEMS: Resequence file.
Date: Sun, 16 Apr 2023 21:23:09 -0400 (EDT)

gbranden pushed a commit to branch master
in repository groff.

commit 16deaeb7d2866a008e9e1d862874b96ede47a07e
Author: G. Branden Robinson <g.branden.robinson@gmail.com>
AuthorDate: Sun Apr 16 04:00:29 2023 -0500

    PROBLEMS: Resequence file.
    
    Explain the order that it's in, to aid readers and, I hope, help
    maintainers keep it in order.
    
    Still to do: replace Git commit info with groff release info.
---
 PROBLEMS | 1176 +++++++++++++++++++++++++++++++++-----------------------------
 1 file changed, 631 insertions(+), 545 deletions(-)

diff --git a/PROBLEMS b/PROBLEMS
index 102d85024..0b8490f22 100644
--- a/PROBLEMS
+++ b/PROBLEMS
@@ -17,60 +17,43 @@ Problems are organized into categories underscored with 
equals signs.
 * Platform-Dependent Macro Problems
 * Compilation Problems
 
+Within each category, items are organized in reverse chronological order
+(that is, with the most recent first).  groff version numbers
+corresponding to their inclusion in this file are included as
+guideposts.  Entries have been revised for clarity in the years since.
+
 
 General Problems
 ================
 
 
+[groff 405fe32847a598962dc3ad8469b9ed0bac4c50ba 2023-03-06]
 
-* Displaying a man page on a terminal with/without my favorite pager
-  shows garbage.
-
-groff's terminal output driver, grotty, by default uses ISO 6429/ECMA-48
-escape sequences understood by video terminals and their emulators,
-rather than the overstriking sequences implemented for typewriter-like
-terminals used in the 1960s and 1970s.  These escape sequences control
-display attributes like bold and italic or oblique typefaces,
-underlining, foreground and background color selection, and hyperlink
-marking.  Terminal emulators that claim compatibility with the DEC
-VT100, Linux console driver, or xterm should ignore well-formed escape
-sequences that they are not able to support, but some implementations
-are buggy.
-
-Furthermore, the popular "less" pager by default assumes that its input
-will use overstriking sequences.  (This is a surprising choice, as users
-of paper terminals had no need for pager programs; to "scroll back", the
-operator would simply physically pull up the spool of ejected paper to
-read it.)  less(1) must instead be given the '-R' option to interpret
-escape sequences used by video terminals.  Be aware that the
-overstriking convention is inescapably ambiguous in some output
-sequences.  See the grotty(1) man page.
-
-Hyperlink support in terminal emulators is a relatively new initiative
-(as of 2022) employing a sequence known as "OSC 8".
-  https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+* gdiffmk doesn't work on FreeBSD; I get errors from "expr".
 
-Due to the feature's young age, the man and mdoc macro packages have a
-configuration switch for hyperlink support, and it may be disabled in
-your site's man.local and mdoc.local files.  Use a command like
-  printf '\033]8;;man:grotty(1)\033\\grotty(1)\033]8;;\033\\\n' | more
-to check your terminal and pager for OSC 8 support.  If you see
-"grotty(1)" and no additional garbage characters, then you may wish to
-edit those site files to remove any lines that disable this feature.
+gdiffmk uses the expr(1) command to parse its arguments.  FreeBSD has
+extended the syntax of its expr command in a non-backward compatible way
+that it claims better conforms with POSIX's utility syntax guidelines
+with respect to option processing: however, POSIX mandates no options
+for expr.  Other implementations of expr do not support traditional
+Unix-style options ('-a', '-b', ...), and perhaps as a consequence do
+not follow FreeBSD's interpretation of the guidelines.  You way want to
+set $EXPR_COMPAT in your shell environment.  We hope to have a
+workaround for this behavior in a future release.
 
-There are a couple of workarounds if you prefer or require overstriking
-sequences rather than ISO 6429/ECMA-48 escape sequences.
+----------------------------------------------------------------------
 
-  1. Set the GROFF_NO_SGR environment variable to any value.
+[groff 10274fb69e517b2c4b10fcd0ba3347e5bd0eefd7 2023-02-11]
 
-  2. Pass option '-c' to grotty (that is, add '-P-c' to groff's
-     command-line options).
+* gdiffmk doesn't work / its automated test fails.
 
-The third and probably best option is to use terminal and pager programs
-that handle standardized video terminal escape sequences well.
+A defect in GNU diffutils 3.9 (January 2023) causes gdiffmk to
+malfunction.  See <https://debbugs.gnu.org/db/61/61193.html>.
 
 ----------------------------------------------------------------------
 
+[groff 5195c5d7bf8df5478fce6714ea89844e9e228175 2003-07-21]
+
 * When viewing man pages, some characters on my UTF-8 terminal emulator
   look funny or copy-and-paste wrong.  Why?
 
@@ -108,27 +91,58 @@ character escape sequences '\(mi' or '\[mi]'.
 
 ----------------------------------------------------------------------
 
-* gdiffmk doesn't work / its automated test fails.
+[groff 5c1dfd65245b5769d514c4b6f78e6272f132e229 2003-07-18]
 
-A defect in GNU diffutils 3.9 (January 2023) causes gdiffmk to
-malfunction.  See <https://debbugs.gnu.org/db/61/61193.html>.
+* Displaying a man page on a terminal with/without my favorite pager
+  shows garbage.
 
-----------------------------------------------------------------------
+groff's terminal output driver, grotty, by default uses ISO 6429/ECMA-48
+escape sequences understood by video terminals and their emulators,
+rather than the overstriking sequences implemented for typewriter-like
+terminals used in the 1960s and 1970s.  These escape sequences control
+display attributes like bold and italic or oblique typefaces,
+underlining, foreground and background color selection, and hyperlink
+marking.  Terminal emulators that claim compatibility with the DEC
+VT100, Linux console driver, or xterm should ignore well-formed escape
+sequences that they are not able to support, but some implementations
+are buggy.
 
-* gdiffmk doesn't work on FreeBSD; I get errors from "expr".
+Furthermore, the popular "less" pager by default assumes that its input
+will use overstriking sequences.  (This is a surprising choice, as users
+of paper terminals had no need for pager programs; to "scroll back", the
+operator would simply physically pull up the spool of ejected paper to
+read it.)  less(1) must instead be given the '-R' option to interpret
+escape sequences used by video terminals.  Be aware that the
+overstriking convention is inescapably ambiguous in some output
+sequences.  See the grotty(1) man page.
 
-gdiffmk uses the expr(1) command to parse its arguments.  FreeBSD has
-extended the syntax of its expr command in a non-backward compatible way
-that it claims better conforms with POSIX's utility syntax guidelines
-with respect to option processing: however, POSIX mandates no options
-for expr.  Other implementations of expr do not support traditional
-Unix-style options ('-a', '-b', ...), and perhaps as a consequence do
-not follow FreeBSD's interpretation of the guidelines.  You way want to
-set $EXPR_COMPAT in your shell environment.  We hope to have a
-workaround for this behavior in a future release.
+Hyperlink support in terminal emulators is a relatively new initiative
+(as of 2022) employing a sequence known as "OSC 8".
+  https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
+
+Due to the feature's young age, the man and mdoc macro packages have a
+configuration switch for hyperlink support, and it may be disabled in
+your site's man.local and mdoc.local files.  Use a command like
+  printf '\033]8;;man:grotty(1)\033\\grotty(1)\033]8;;\033\\\n' | more
+to check your terminal and pager for OSC 8 support.  If you see
+"grotty(1)" and no additional garbage characters, then you may wish to
+edit those site files to remove any lines that disable this feature.
+
+There are a couple of workarounds if you prefer or require overstriking
+sequences rather than ISO 6429/ECMA-48 escape sequences.
+
+  1. Set the GROFF_NO_SGR environment variable to any value.
+
+  2. Pass option '-c' to grotty (that is, add '-P-c' to groff's
+     command-line options).
+
+The third and probably best option is to use terminal and pager programs
+that handle standardized video terminal escape sequences well.
 
 ----------------------------------------------------------------------
 
+[groff 1.16]
+
 * My document says that the current year is 19100, not 2000.
 
 In groff, as in traditional troff, the yr number register yields the
@@ -153,94 +167,7 @@ or, if you want to be portable to older troff versions, as 
follows:
 
 ----------------------------------------------------------------------
 
-* groff can't handle my troff document.  It works fine with AT&T
-  troff.
-
-Read the section on incompatibilities in groff_diff(7).  Try using the
--C option.  Alternatively there's the sed script `tmac/fixmacros.sed'
-which attempts to edit a file of macros so that it can be used with
-groff without the -C flag.
-
-----------------------------------------------------------------------
-
-* gtroff doesn't understand lines like `.ce99' with no space between
-  the name of the request or macro and the arguments.
-
-gtroff requires a space between macro or request and its arguments
-because it allows the use of long names for macros and requests.  You
-can use the -C option or the `cp' request to put gtroff into a
-compatibility mode in which it is not possible to use long names for
-macros but in which no space is required between macros and their
-arguments.  The use of compatibility mode is strongly discouraged.
-
-----------------------------------------------------------------------
-
-* groff -Tdvi produces dvi files that use fonts at weird
-  magnifications.
-
-Yes, it does.  You may need to compile fonts with Metafont at these
-magnifications.  The CompileFonts script in the devdvi/generate
-directory may help you to do this.  (It takes a *long* time on slow
-computers.)
-
-----------------------------------------------------------------------
-
-* Groff doesn't use the font names I'm used to.
-
-Use the `ftr' request.  See groff_diff(7).
-
-----------------------------------------------------------------------
-
-* gpic output is not centered horizontally; pictures sometimes run off
-  the bottom of the page.
-
-The macro package you are using is not supplying appropriate
-definitions of PS and PE.  Give groff a -mpic option.
-
-----------------------------------------------------------------------
-
-* gpic doesn't accept the syntax `chop N M' for chopping both ends of
-  a line.
-
-The correct syntax is `chop N chop M'.
-
-----------------------------------------------------------------------
-
-* With gpic -t, when I print `line ->; box' using a dvi to ps program,
-  the arrow head sticks through into the inside of the box.
-
-The dvi to ps program should be modified to set the line cap and line
-join parameters to 1 while printing tpic specials.
-
-----------------------------------------------------------------------
-
-* gtroff gives warnings about lines like
-  .ev  \" a comment
-  (with a tab after the .ev).
-
-A tab character cannot be used as a substitute for a space character
-(except in one case: between a control character at the beginning of a
-line and the name of a macro or request).  For example, in Unix troff
-
-  .ps  \" restore the previous point size
-
-(with a tab after the .ps) does NOT restore the previous point-size;
-instead it is silently ignored.  Since this is very likely to be an
-error, gtroff can give a warning about it.  If you want to align
-comments, you can do it like this:
-
-  .ev\"                                \" a comment
-
-----------------------------------------------------------------------
-
-* I don't like the page headers and footers produced by groff -man.
-
-There seem to be many different styles of page header and footer
-produced by different versions of the -man macros.  You need to put
-modified macros from tmac/an.tmac into man.local.  More information is
-available in groff_man(7).
-
-----------------------------------------------------------------------
+[groff 1.09]
 
 * Where can I get grap?
 
@@ -274,33 +201,7 @@ in the \n[rst] and \n[rsb] registers; these are groff 
extensions.
 
 ----------------------------------------------------------------------
 
-* While formatting a manual page, groff complains about not being able
-  to break lines.  A line like the following seems to cause this.
-    .TP \w'label'+2
-
-The groff_man(7) man page says that the default scaling unit for the
-`TP` macro is 'n' (ens), and that is how the groff man macros are
-implemented.  Consequently, the macro argument above is evaluated
-equivalently to this expression.
-
-  \w'label'n+2n
-
-AT&T troff's man macros don't implement this correctly (probably because
-it's hard to do in that troff); instead, they append 'n' to the entire
-argument, so that it is evaluated as if it were written as follows.
-
-  \w'label'u+2n
-
-The solution is to fix the manual page.
-
-  .TP \w'label'u+2
-
-It might be better still to avoid such computations in macro arguments,
-however; programs that are not *roff formatters that attempt to
-interpret man pages can lack the ability to interpret numeric
-expressions.  See section "Portability" of groff_man_style(7).
-
-----------------------------------------------------------------------
+[groff 1.08]
 
 * I'm having problems formatting man pages produced by the perl
   wrapman script.
@@ -383,6 +284,8 @@ following patch:
 
 ----------------------------------------------------------------------
 
+[groff 1.07]
+
 * groff uses up an enormous amount of memory processing large files.
   I'm using 386BSD 0.1.
 
@@ -418,26 +321,226 @@ and recompile groff:
         else
        exprstmt = 0;
 
+----------------------------------------------------------------------
 
+[groff 1.06]
 
-Printing and Display Problems
-=============================
+* groff can't handle my troff document.  It works fine with AT&T
+  troff.
 
+Read the section on incompatibilities in groff_diff(7).  Try using the
+-C option.  Alternatively there's the sed script `tmac/fixmacros.sed'
+which attempts to edit a file of macros so that it can be used with
+groff without the -C flag.
 
+----------------------------------------------------------------------
 
-* I'm having problems including PostScript illustrations (EPS) using
-  the PSPIC macro and/or \X'ps: import ...'.
+* groff -Tdvi produces dvi files that use fonts at weird
+  magnifications.
 
-A PostScript document must meet three requirements in order to be
-included with the PSPIC macro: it must comply with the Adobe Document
-Structuring Conventions; it must contain a BoundingBox line; it must
-be `well-behaved'.  The BoundingBox line should be of the form:
+Yes, it does.  You may need to compile fonts with Metafont at these
+magnifications.  The CompileFonts script in the devdvi/generate
+directory may help you to do this.  (It takes a *long* time on slow
+computers.)
 
-  %%BoundingBox: llx lly urx ury
+----------------------------------------------------------------------
 
-where llx, lly, urx, ury are the coordinates of the lower left x,
-lower left y, upper right x, upper right y of the bounding box of
-marks on the page expressed as integers in the default PostScript
+[groff 1.01]
+
+* gpic output is not centered horizontally; pictures sometimes run off
+  the bottom of the page.
+
+The macro package you are using is not supplying appropriate
+definitions of PS and PE.  Give groff a -mpic option.
+
+----------------------------------------------------------------------
+
+* Groff doesn't use the font names I'm used to.
+
+Use the `ftr' request.  See groff_diff(7).
+
+----------------------------------------------------------------------
+
+* I get errors using the Unix -ms macros with groff -e -C.
+
+Apply this change:
+
+*** /usr/lib/ms/ms.eqn Tue Apr 25 02:14:28 1989
+--- ms.eqn     Sun Nov 11 10:33:59 1990
+***************
+*** 22,29 ****
+  ..
+  .    \" EN - end of a displayed equation
+  .de EN
+! .if !\\*(10 .br
+  .di
+  .rm EZ
+  .nr ZN \\n(dn
+  .if \\n(ZN>0 .if \\n(YE=0 .LP
+--- 22,30 ----
+  ..
+  .    \" EN - end of a displayed equation
+  .de EN
+! .if \\n(.k>0 .br
+  .di
++ .ds 10 \\*(EZ\\
+  .rm EZ
+  .nr ZN \\n(dn
+  .if \\n(ZN>0 .if \\n(YE=0 .LP
+
+----------------------------------------------------------------------
+
+* gpic doesn't accept the syntax `chop N M' for chopping both ends of
+  a line.
+
+The correct syntax is `chop N chop M'.
+
+----------------------------------------------------------------------
+
+* With gpic -t, when I print `line ->; box' using a dvi to ps program,
+  the arrow head sticks through into the inside of the box.
+
+The dvi to ps program should be modified to set the line cap and line
+join parameters to 1 while printing tpic specials.
+
+----------------------------------------------------------------------
+
+* gtroff doesn't understand lines like `.ce99' with no space between
+  the name of the request or macro and the arguments.
+
+gtroff requires a space between macro or request and its arguments
+because it allows the use of long names for macros and requests.  You
+can use the -C option or the `cp' request to put gtroff into a
+compatibility mode in which it is not possible to use long names for
+macros but in which no space is required between macros and their
+arguments.  The use of compatibility mode is strongly discouraged.
+
+----------------------------------------------------------------------
+
+* gtroff gives warnings about lines like
+  .ev  \" a comment
+  (with a tab after the .ev).
+
+A tab character cannot be used as a substitute for a space character
+(except in one case: between a control character at the beginning of a
+line and the name of a macro or request).  For example, in Unix troff
+
+  .ps  \" restore the previous point size
+
+(with a tab after the .ps) does NOT restore the previous point-size;
+instead it is silently ignored.  Since this is very likely to be an
+error, gtroff can give a warning about it.  If you want to align
+comments, you can do it like this:
+
+  .ev\"                                \" a comment
+
+----------------------------------------------------------------------
+
+* I don't like the page headers and footers produced by groff -man.
+
+There seem to be many different styles of page header and footer
+produced by different versions of the -man macros.  You need to put
+modified macros from tmac/an.tmac into man.local.  More information is
+available in groff_man(7).
+
+----------------------------------------------------------------------
+
+* While formatting a manual page, groff complains about not being able
+  to break lines.  A line like the following seems to cause this.
+    .TP \w'label'+2
+
+The groff_man(7) man page says that the default scaling unit for the
+`TP` macro is 'n' (ens), and that is how the groff man macros are
+implemented.  Consequently, the macro argument above is evaluated
+equivalently to this expression.
+
+  \w'label'n+2n
+
+AT&T troff's man macros don't implement this correctly (probably because
+it's hard to do in that troff); instead, they append 'n' to the entire
+argument, so that it is evaluated as if it were written as follows.
+
+  \w'label'u+2n
+
+The solution is to fix the manual page.
+
+  .TP \w'label'u+2
+
+It might be better still to avoid such computations in macro arguments,
+however; programs that are not *roff formatters that attempt to
+interpret man pages can lack the ability to interpret numeric
+expressions.  See section "Portability" of groff_man_style(7).
+
+
+
+Printing and Display Problems
+=============================
+
+
+
+[groff 1.09]
+
+* How can I use groff with an old LaserJet printer that doesn't work
+  with groff -Tlj4?
+
+You have at least 3 options:
+
+- use groff -Tps with GNU Ghostscript;
+
+- use groff -Tdvi with a TeX .dvi to LaserJet driver;
+
+- use groff with the LaserJet driver in Chris Lewis' psroff package
+  (available for ftp from:
+  ftp.uunet.ca:/distrib/chris_lewis/psroff3.0pl17).
+
+----------------------------------------------------------------------
+
+* Groff seems to generate level 3 Postscript, but my printer is only a
+  level 1 or 2 PostScript printer.
+
+In fact groff generates only level 2 PostScript (or rather level 1
+with some extensions; see grops(1) for more information how to disable
+them).  The `%!PS-Adobe-3.0' comment at the beginning of PostScript
+output generated by groff indicates that the file conforms to version
+3.0 of the Adobe Document Structuring Conventions.  The output
+generated by groff should be printable on any PostScript printer.
+Problems with groff output's not printing are most often caused by the
+spooling system.
+
+----------------------------------------------------------------------
+
+[groff 1.04]
+
+* When I try to run gxditview, I get the error:
+  Error: Widget viewport has zero width and/or height
+
+This error means you haven't correctly installed the application
+defaults file, GXditview.ad; `make install' does this for you
+automatically, so either you didn't do `make install', or you haven't
+passed a good `--appdefdir=<DIR>' argument to groff's configure
+script.
+
+See the X(7) man page for information how and where application
+defaults files have to be located.  Look for the XAPPLRESDIR and
+XUSERFILESEARCHPATH environment variables.
+
+----------------------------------------------------------------------
+
+[groff 1.01]
+
+* I'm having problems including PostScript illustrations (EPS) using
+  the PSPIC macro and/or \X'ps: import ...'.
+
+A PostScript document must meet three requirements in order to be
+included with the PSPIC macro: it must comply with the Adobe Document
+Structuring Conventions; it must contain a BoundingBox line; it must
+be `well-behaved'.  The BoundingBox line should be of the form:
+
+  %%BoundingBox: llx lly urx ury
+
+where llx, lly, urx, ury are the coordinates of the lower left x,
+lower left y, upper right x, upper right y of the bounding box of
+marks on the page expressed as integers in the default PostScript
 coordinate system (72 units per inch, origin at bottom left corner).
 
 The most convenient program to get the bounding box of a document is
@@ -484,29 +587,6 @@ Make sure that the paper format is "letter".  See 
groff_tmac(5).
 
 ----------------------------------------------------------------------
 
-* When I try to run gxditview, I get the error:
-  Error: Widget viewport has zero width and/or height
-
-This error means you haven't correctly installed the application
-defaults file, GXditview.ad; `make install' does this for you
-automatically, so either you didn't do `make install', or you haven't
-passed a good `--appdefdir=<DIR>' argument to groff's configure
-script.
-
-See the X(7) man page for information how and where application
-defaults files have to be located.  Look for the XAPPLRESDIR and
-XUSERFILESEARCHPATH environment variables.
-
-----------------------------------------------------------------------
-
-* When I preview documents using -TX75 or -TX100, the layout is not
-  the same as when I print the document with -Tps: the line and page
-  breaks come in different places.
-
-Use `groff -X -Tps'.
-
-----------------------------------------------------------------------
-
 * When I try to print the output of groff -Tps, I get no output at all
   from the printer, and the log file shows the error
   %%[ error: undefined; offendingcommand: BP ]%%
@@ -543,32 +623,11 @@ files produced by TeX.  Try getting a more up to date 
driver.
 
 ----------------------------------------------------------------------
 
-* How can I use groff with an old LaserJet printer that doesn't work
-  with groff -Tlj4?
-
-You have at least 3 options:
-
-- use groff -Tps with GNU Ghostscript;
-
-- use groff -Tdvi with a TeX .dvi to LaserJet driver;
-
-- use groff with the LaserJet driver in Chris Lewis' psroff package
-  (available for ftp from:
-  ftp.uunet.ca:/distrib/chris_lewis/psroff3.0pl17).
-
-----------------------------------------------------------------------
-
-* Groff seems to generate level 3 Postscript, but my printer is only a
-  level 1 or 2 PostScript printer.
+* When I preview documents using -TX75 or -TX100, the layout is not
+  the same as when I print the document with -Tps: the line and page
+  breaks come in different places.
 
-In fact groff generates only level 2 PostScript (or rather level 1
-with some extensions; see grops(1) for more information how to disable
-them).  The `%!PS-Adobe-3.0' comment at the beginning of PostScript
-output generated by groff indicates that the file conforms to version
-3.0 of the Adobe Document Structuring Conventions.  The output
-generated by groff should be printable on any PostScript printer.
-Problems with groff output's not printing are most often caused by the
-spooling system.
+Use `groff -X -Tps'.
 
 
 
@@ -577,11 +636,7 @@ Platform-Dependent Macro Problems
 
 
 
-* I get lots of errors when I use groff with the AT&T -mm macros.
-
-Use the groff -mm macros.
-
-----------------------------------------------------------------------
+[groff 92feb549bb17ba935188f5a3f123ce30ced54311 2001-04-13]
 
 * groff produces wrapper macros for `ms' and friends which call the
   system's original macros.  Then, to get groff's ms macro package I
@@ -596,75 +651,7 @@ macros.
 
 ----------------------------------------------------------------------
 
-* I'm having problems formatting HP-UX 9.0 man pages with groff -man.
-
-Copy HP's tmac.an into /usr/local/share/groff/site-tmac/an.tmac, and
-either put `.cp 1' at the beginning or filter it (and any files it
-.so's) through tmac/fixmacros.sed.
-
-----------------------------------------------------------------------
-
-* I get errors using the Unix -ms macros with groff -e -C.
-
-Apply this change:
-
-*** /usr/lib/ms/ms.eqn Tue Apr 25 02:14:28 1989
---- ms.eqn     Sun Nov 11 10:33:59 1990
-***************
-*** 22,29 ****
-  ..
-  .    \" EN - end of a displayed equation
-  .de EN
-! .if !\\*(10 .br
-  .di
-  .rm EZ
-  .nr ZN \\n(dn
-  .if \\n(ZN>0 .if \\n(YE=0 .LP
---- 22,30 ----
-  ..
-  .    \" EN - end of a displayed equation
-  .de EN
-! .if \\n(.k>0 .br
-  .di
-+ .ds 10 \\*(EZ\\
-  .rm EZ
-  .nr ZN \\n(dn
-  .if \\n(ZN>0 .if \\n(YE=0 .LP
-
-----------------------------------------------------------------------
-
-* I'm having problems formatting Ultrix man pages with groff -man.
-
-The Ultrix man pages use a number of non-standard extensions to the
-Unix man macros.  One solution is to use the Ultrix -man macros with
-groff.  Copy /usr/lib/tmac/tmac.an to
-/usr/local/share/groff/site-tmac/an.tmac and apply the following patch
-(from Frank Wortner):
-
-*** /usr/local/lib/groff/tmac/tmac.an     Wed Sep  9 12:29:28 1992
---- /usr/lib/tmac/tmac.an       Fri Jul 24 19:58:19 1992
-***************
-*** 489,495 ****
-  .     \" make special case of shift out of italic
-  .de }S
-  .ds ]F
-! .if \\$12 .if !\\$5 .ds ]F \^
-  .ie !\\$4 .}S \\$2 \\$1 "\\$3\f\\$1\\$4\\*(]F" "\\$5" "\\$6" "\\$7" "\\$8" 
"\\$9"
-  .el \\$3
-  .}f
---- 489,495 ----
-  .     \" make special case of shift out of italic
-  .de }S
-  .ds ]F
-! .if \\$12 .if !\\$5 .ds ]F\^
-  .ie !\\$4 .}S \\$2 \\$1 "\\$3\f\\$1\\$4\\*(]F" "\\$5" "\\$6" "\\$7" "\\$8" 
"\\$9"
-  .el \\$3
-  .}f
-
-Another possible solution is to install tmac/man.ultrix as
-/usr/local/share/groff/site-tmac/man.local.
-
-----------------------------------------------------------------------
+[groff 1.09]
 
 * On an SGI system, how can I make the man command use groff?
 
@@ -733,15 +720,68 @@ To get PostScript output from `man -t', you also need to 
create a
 *** 49,53 ****
   rest=`echo ${1+"$@"} | sed -e 's+/usr/lib/tmac+/usr/local/lib/groff/tmac+'`
 
-  # This shell script is intended for use with man, so warnings are
-  # probably not wanted.  Also load nroff-style character definitions.
-! exec groff -Wall -mtty-char $T $opts $rest
---- 52,56 ----
-  rest=`echo ${1+"$@"} | sed -e 's+/usr/lib/tmac+/usr/local/lib/groff/tmac+'`
+  # This shell script is intended for use with man, so warnings are
+  # probably not wanted.  Also load nroff-style character definitions.
+! exec groff -Wall -mtty-char $T $opts $rest
+--- 52,56 ----
+  rest=`echo ${1+"$@"} | sed -e 's+/usr/lib/tmac+/usr/local/lib/groff/tmac+'`
+
+  # This shell script is intended for use with man, so warnings are
+! # probably not wanted.
+! exec groff -Wall $T $opts $rest
+
+----------------------------------------------------------------------
+
+[groff 1.08]
+
+* I'm having problems formatting HP-UX 9.0 man pages with groff -man.
+
+Copy HP's tmac.an into /usr/local/share/groff/site-tmac/an.tmac, and
+either put `.cp 1' at the beginning or filter it (and any files it
+.so's) through tmac/fixmacros.sed.
+
+----------------------------------------------------------------------
+
+[groff 1.07]
+
+* I'm having problems formatting Ultrix man pages with groff -man.
+
+The Ultrix man pages use a number of non-standard extensions to the
+Unix man macros.  One solution is to use the Ultrix -man macros with
+groff.  Copy /usr/lib/tmac/tmac.an to
+/usr/local/share/groff/site-tmac/an.tmac and apply the following patch
+(from Frank Wortner):
+
+*** /usr/local/lib/groff/tmac/tmac.an     Wed Sep  9 12:29:28 1992
+--- /usr/lib/tmac/tmac.an       Fri Jul 24 19:58:19 1992
+***************
+*** 489,495 ****
+  .     \" make special case of shift out of italic
+  .de }S
+  .ds ]F
+! .if \\$12 .if !\\$5 .ds ]F \^
+  .ie !\\$4 .}S \\$2 \\$1 "\\$3\f\\$1\\$4\\*(]F" "\\$5" "\\$6" "\\$7" "\\$8" 
"\\$9"
+  .el \\$3
+  .}f
+--- 489,495 ----
+  .     \" make special case of shift out of italic
+  .de }S
+  .ds ]F
+! .if \\$12 .if !\\$5 .ds ]F\^
+  .ie !\\$4 .}S \\$2 \\$1 "\\$3\f\\$1\\$4\\*(]F" "\\$5" "\\$6" "\\$7" "\\$8" 
"\\$9"
+  .el \\$3
+  .}f
+
+Another possible solution is to install tmac/man.ultrix as
+/usr/local/share/groff/site-tmac/man.local.
 
-  # This shell script is intended for use with man, so warnings are
-! # probably not wanted.
-! exec groff -Wall $T $opts $rest
+----------------------------------------------------------------------
+
+[groff 1.01]
+
+* I get lots of errors when I use groff with the AT&T -mm macros.
+
+Use the groff -mm macros.
 
 
 
@@ -750,58 +790,54 @@ Compilation Problems
 
 
 
-* I get warnings from afmtodit about names already being mapped.
-
-afmtodit: AGL name 'Delta' already mapped to groff name '*D'; ignoring AGL 
name 'uni0394'
+[groff c70e3c4bfbb202f9f6a2ae1426637550ed8de023 2023-03-06]
 
-You can ignore these if they're in the form shown above, where the
-ignored AGL name is 'uniXXXX' and 'XXXX' is four hexadecimal digits.
-The Adobe Glyph List (AGL) has its own names for glyphs; they are often
-different from groff's special character names.  The afmtodit program is
-constructing a mapping from groff special character names to AGL names;
-this can be a one-to-one or many-to-one mapping, but one-to-many will
-not work, so afmtodit discards the excessive mappings.  The example you
-see above is telling you that the groff font description that afmtodit
-is writing cannot map the groff special character '*D' to both 'Delta'
-and 'uni0394'.
+* The "initialization_is_quiet" test fails on my GNU/Hurd or NetBSD box.
 
-Which, if any, such warnings you see depends on the version of the URW
-fonts you are building groff against.  See the '--with-urw-fonts-dir'
-option to the "configure" script, and the afmtodit(1) and groff_char(7)
-man pages for more background.
+This is a known problem.  We haven't tracked down the cause yet, but
+have improved the reporting of the test output in hopes that we can
+isolate it in a future release.
 
 ----------------------------------------------------------------------
 
-* I get warnings about special characters in the groff_char(7) man page.
+[groff 4fecf105c34ee7e3ed24f494bd4217b7237c5859 2023-02-25]
 
-troff:man/groff_char.7:1000: warning: can't find special character '.j'
-troff:man/groff_char.7:1407: warning: can't find special character 'vA'
-troff:man/groff_char.7:1531: warning: can't find special character 'bs'
-troff:man/groff_char.7:1697: warning: can't find special character '-+'
-troff:man/groff_char.7:1746: warning: can't find special character 'coproduct'
-troff:man/groff_char.7:1839: warning: can't find special character '+e'
+* I get a build failure on Cygwin / a system using newlib and GCC 11.
 
-You can ignore these.  groff defines a handful of special characters for
-which historical PostScript fonts usually did not possess glyphs.
-Except for 'bs' (the Bell System logo), we hope to provide fallbacks or
-a supplementary PostScript font in groff in the future (as was done for
-the Euro glyph).
+  "newlib" defines a function called "utoa" which conflicts with a
+  static (file scope-local) function in src/libs/libxutil/XFontName.c.
+
+  We expect to fix this in the near future; in the meantime, you can
+  patch the file to rename the function (and update its call sites) or,
+  if you don't require the "gxditview" output previewer or "xtotroff"
+  utility, you can build groff without X11 support.
+
+  $ make distclean
+  $ ./configure --without-x
 
 ----------------------------------------------------------------------
 
-* I get warnings about the "vasnprintf" function.
+[groff 434e2b0606ade1736437d8a9be43e8852895c71d 2023-02-22]
 
-lib/vasnprintf.c: In function 'vasnprintf':
-lib/vasnprintf.c:5268:27: warning: format not a string literal, argument types 
not checked [-Wformat-nonliteral]
-(and similar)
+* The "check-default-foundry" test fails when I run "make check".
 
-The groff source tree includes gnulib, the GNU portability library
-<https://www.gnu.org/software/gnulib/>.  These warnings are about its
-source code and that project's responsibility to resolve.  We expect a
-future release of gnulib to do so.
+Your Ghostscript installation may have its fonts embedded in the
+executable; this can be discerned by searching for the pattern "%rom%"
+in its search path.
+
+  $ gs -h | grep '%rom%'
+
+The consequence is that gropdf(1) will be unable to embed fonts into PDF
+files it generates (apart from groff's "EURO" font) when the default
+foundry is used.  This is the same outcome as if Ghostscript were not
+installed at all.  If you install URW fonts (see "INSTALL.extra"), you
+will be able to embed them all by using the "U" foundry with gropdf to
+overcome this problem.
 
 ----------------------------------------------------------------------
 
+[groff 3b04beb92e63cb9d108256ca37cc92446966c89a 2023-02-19]
+
 * I get a lot of warnings about "sprintf" on macOS.
 
 Apple has decided to treat the sprintf() standard C library function as
@@ -823,30 +859,7 @@ Use GNU make instead; it may be available in 
/opt/csw/bin/gmake.
 
 ----------------------------------------------------------------------
 
-* The "check-default-foundry" test fails when I run "make check".
-
-Your Ghostscript installation may have its fonts embedded in the
-executable; this can be discerned by searching for the pattern "%rom%"
-in its search path.
-
-  $ gs -h | grep '%rom%'
-
-The consequence is that gropdf(1) will be unable to embed fonts into PDF
-files it generates (apart from groff's "EURO" font) when the default
-foundry is used.  This is the same outcome as if Ghostscript were not
-installed at all.  If you install URW fonts (see "INSTALL.extra"), you
-will be able to embed them all by using the "U" foundry with gropdf to
-overcome this problem.
-
-----------------------------------------------------------------------
-
-* The "initialization_is_quiet" test fails on my GNU/Hurd or NetBSD box.
-
-This is a known problem.  We haven't tracked down the cause yet, but
-have improved the reporting of the test output in hopes that we can
-isolate it in a future release.
-
-----------------------------------------------------------------------
+[groff 19afc98d213c86504a5475786987c6f86c6817fa 2023-02-09]
 
 * Tests fail when I run "make check" on Solaris 10 or 11.
 
@@ -910,47 +923,204 @@ Some test failures remain expected on Solaris 10.
     POSIX says "[u]nsetting a variable ... that was not previously set
     is not considered an error and will not cause the shell to abort."
 
-    Nevertheless this builtin returns an error exit status in this
-    circumstance.
+    Nevertheless this builtin returns an error exit status in this
+    circumstance.
+
+    $ /usr/xpg4/bin/sh -c 'unset _NON_EXISTENT_XYZ; echo $?'
+    1
+
+    You may disregard these failures, edit the test scripts to append
+    "|| true" to the "unset" commands, or change the scripts to use GNU
+    Bash or some other POSIX-conforming shell as illustrated above.
+
+----------------------------------------------------------------------
+
+[groff 1f4817f375354f062d3b4fdfbc0c52e2676e267b 2022-07-15]
+
+* I get warnings from afmtodit about names already being mapped.
+
+afmtodit: AGL name 'Delta' already mapped to groff name '*D'; ignoring AGL 
name 'uni0394'
+
+You can ignore these if they're in the form shown above, where the
+ignored AGL name is 'uniXXXX' and 'XXXX' is four hexadecimal digits.
+The Adobe Glyph List (AGL) has its own names for glyphs; they are often
+different from groff's special character names.  The afmtodit program is
+constructing a mapping from groff special character names to AGL names;
+this can be a one-to-one or many-to-one mapping, but one-to-many will
+not work, so afmtodit discards the excessive mappings.  The example you
+see above is telling you that the groff font description that afmtodit
+is writing cannot map the groff special character '*D' to both 'Delta'
+and 'uni0394'.
+
+Which, if any, such warnings you see depends on the version of the URW
+fonts you are building groff against.  See the '--with-urw-fonts-dir'
+option to the "configure" script, and the afmtodit(1) and groff_char(7)
+man pages for more background.
+
+----------------------------------------------------------------------
+
+[groff 49b611f1135cbf7f18b656bb445a291d48dd5c86 2022-05-22]
+
+* I am building from the Git repository, using 'autoreconf' from a GNU
+  Autoconf release earlier than 2.69, and I get this.
+
+  /usr/share/aclocal/gtkglextmm-1.2.m4:225:
+    warning: underquoted definition of AC_GTKGLEXTMM_SUPPORTS_MULTIHEAD
+  /usr/share/aclocal/gtkglextmm-1.2.m4:225:
+    run info '(automake)Extending aclocal'
+  /usr/share/aclocal/gtkglextmm-1.2.m4:225:
+    or see 
http://www.gnu.org/software/automake/manual/automake.html#Extending-aclocal
+
+Ignore this.  It doesn't occur in more recent versions of 'autoreconf'.
+
+----------------------------------------------------------------------
+
+[groff 0d371991136a081c57131cad87380cc4aef64169 2022-05-15]
+
+* I get warnings about special characters in the groff_char(7) man page.
+
+troff:man/groff_char.7:1000: warning: can't find special character '.j'
+troff:man/groff_char.7:1407: warning: can't find special character 'vA'
+troff:man/groff_char.7:1531: warning: can't find special character 'bs'
+troff:man/groff_char.7:1697: warning: can't find special character '-+'
+troff:man/groff_char.7:1746: warning: can't find special character 'coproduct'
+troff:man/groff_char.7:1839: warning: can't find special character '+e'
+
+You can ignore these.  groff defines a handful of special characters for
+which historical PostScript fonts usually did not possess glyphs.
+Except for 'bs' (the Bell System logo), we hope to provide fallbacks or
+a supplementary PostScript font in groff in the future (as was done for
+the Euro glyph).
+
+----------------------------------------------------------------------
+
+* I get warnings about the "vasnprintf" function.
+
+lib/vasnprintf.c: In function 'vasnprintf':
+lib/vasnprintf.c:5268:27: warning: format not a string literal, argument types 
not checked [-Wformat-nonliteral]
+(and similar)
+
+The groff source tree includes gnulib, the GNU portability library
+<https://www.gnu.org/software/gnulib/>.  These warnings are about its
+source code and that project's responsibility to resolve.  We expect a
+future release of gnulib to do so.
+
+----------------------------------------------------------------------
+
+[groff 8a4d69839faa14deb1a5a204e7c28fd85806511c 2015-12-26]
+
+* When compiling on NetBSD, make issues warnings like
+
+  Warning: line 28: Unable to locate font(s)
+  URWGothicL-Demi,a010015l.pfb on the given path(s)
+
+  and
+
+  Warning: line 77: Failed to create groff font 'U-AB' by running
+  afmtodit
+
+In this case install the package "urw-fonts":
+
+  pkgin install urw-fonts
+
+and make the font path known to ghostscript, e.g. with (ksh):
+
+  export GS_LIB=/usr/pkg/share/fonts/urw
+
+----------------------------------------------------------------------
+
+* Currently (December 2015) building groff fails on NetBSD and
+  FreeBSD with the message:
+
+  make[1]: don't know how to make contrib/chem/chem.1. Stop
+
+The reason is a bug in the make(1) tool used on those systems related
+to .SUFFIXES lines.
+
+A temporary workaround is to change the Makefile line
+
+  .SUFFIXES: .roff .in .ps .mom .pdf .me .ms .ps .html .txt .texi \
+    .dvi .pdf .xhtml .man .c .cpp .log .o .obj .sed .sin \
+    .test .test$(EXEEXT) .trs .ypp
+
+into
+
+  .SUFFIXES: .man .roff .in .ps .mom .pdf .me .ms .ps .html .txt \
+    .texi .dvi .pdf .xhtml .c .cpp .log .o .obj .sed .sin \
+    .test .test$(EXEEXT) .trs .ypp
+
+(put .man at begin of the list).
+
+The bug is reported to the maintainer of the make(1) tool of those
+systems.
+
+----------------------------------------------------------------------
+
+[groff dfdf0c0bb887010bd0047409c954e5d7a6d55d05 2014-09-04]
+
+* Configuration on MacOS X 10.6 doesn't succeed.
+
+Use
+
+  ./configure CXX=g++-4.2
+
+----------------------------------------------------------------------
+
+[groff 6b3c51ebb4e3dbcb294f9c23d9ec0624b5beb4ee 2010-01-23]
+
+* In MacOS X, I want to completely replace the groff that came with
+  the system.
+
+Use
+
+  ./configure --prefix=/usr --mandir=/usr/share/man
+
+then
 
-    $ /usr/xpg4/bin/sh -c 'unset _NON_EXISTENT_XYZ; echo $?'
-    1
+  make
+  make install
 
-    You may disregard these failures, edit the test scripts to append
-    "|| true" to the "unset" commands, or change the scripts to use GNU
-    Bash or some other POSIX-conforming shell as illustrated above.
+Note that subsequent system updates may replace your groff.
 
 ----------------------------------------------------------------------
 
-* I get a build failure on Cygwin / a system using newlib and GCC 11.
+[groff 26f1dfcd080e834617302c7a94423d02d17e15a7 2004-05-25]
 
-  "newlib" defines a function called "utoa" which conflicts with a
-  static (file scope-local) function in src/libs/libxutil/XFontName.c.
+* I get warnings from the Sun linker while using gcc 3.4.0:
 
-  We expect to fix this in the near future; in the meantime, you can
-  patch the file to rename the function (and update its call sites) or,
-  if you don't require the "gxditview" output previewer or "xtotroff"
-  utility, you can build groff without X11 support.
+  ld: warning: relocation error: R_SPARC_UA32:
+      file groff/src/libs/libgroff/libgroff.a(getopt.o): symbol optarg:
+      external symbolic relocation against non-allocatable
+      section .debug_info; cannot be processed at runtime:
+      relocation ignored
 
-  $ make distclean
-  $ ./configure --without-x
+This seems to be a known problem (Sun bugs #4910101 and #4910810,
+filed in September 2003; gcc bug #15599, filed May 2004) without a
+public fix as of this writing.  A work-around is to use option
+`-gstabs+' instead of `-g' (and a high probability that the output is
+only debuggable with gdb but not with Sun's debuggers).
 
 ----------------------------------------------------------------------
 
-* I am building from the Git repository, using 'autoreconf' from a GNU
-  Autoconf release earlier than 2.69, and I get this.
+[groff ee83e4fd48e50d10967b02e06f128a1452f183b7 2002-11-07]
 
-  /usr/share/aclocal/gtkglextmm-1.2.m4:225:
-    warning: underquoted definition of AC_GTKGLEXTMM_SUPPORTS_MULTIHEAD
-  /usr/share/aclocal/gtkglextmm-1.2.m4:225:
-    run info '(automake)Extending aclocal'
-  /usr/share/aclocal/gtkglextmm-1.2.m4:225:
-    or see 
http://www.gnu.org/software/automake/manual/automake.html#Extending-aclocal
+* When compiling on MacOS X 10.2, groff compiles but does not run
+  well, especially `eqn', causing many `can't break line' messages.
 
-Ignore this.  It doesn't occur in more recent versions of 'autoreconf'.
+Use
+
+  ./configure CXX=g++2
+
+then
+
+  make
+
+as usual.
 
 ----------------------------------------------------------------------
 
+[groff 3371324496b9ba0efb65e0c66340ca7f99a8bb56 2002-02-07]
+
 * Compilation dies with
 
     y.tab.c: In function `int yyparse()':
@@ -965,11 +1135,7 @@ byacc.
 
 ----------------------------------------------------------------------
 
-* There are many empty `Makefile.dep' files.  Is this a bug?
-
-No.  Real dependency files are created with a `make depend' call.
-
-----------------------------------------------------------------------
+[groff e73d5afff5595b13052180c8cc5f402bff39131e 2000-12-06]
 
 * On HP-UX, the compiler complains about missing symbol `alloca'.
 
@@ -981,6 +1147,39 @@ before starting the configure script.
 
 ----------------------------------------------------------------------
 
+[groff 2e836ac7d3d9264efb9ae5a06bfe8c7149e22eac 2000-07-21]
+
+* On a host using Unix make (e.g. Solaris), if you are compiling for
+  multiple architectures by building in a subdirectory, the make stops
+  with a message like this:
+
+    make: Fatal error: Don't know how to make target `assert.o'
+
+  or like this:
+
+    make: Fatal error: Can't find /u/src/groff/src/include/Makefile.sub': No 
such file or directory
+
+This occurs because GNU make and Unix make handle VPATH differently,
+and the groff build relies on GNU make's VPATH handling.
+
+Use GNU make <http://www.gnu.org/software/make/> to work around this.
+In Solaris 8 and 9, GNU make is on the Software Companion CD in
+package SFWgmake and is installed as /opt/sfw/bin/gmake.  Prebuilt
+versions of GNU make for Solaris are also available from
+sunfreeware.com.
+
+----------------------------------------------------------------------
+
+[groff 5af19087eef2de233075c39a1479e11c8fcbe3e9 2000-05-28]
+
+* There are many empty `Makefile.dep' files.  Is this a bug?
+
+No.  Real dependency files are created with a `make depend' call.
+
+----------------------------------------------------------------------
+
+[groff fbd6cbb8ac7a42fdf219ff087b5b1e98cdeb7c68 2000-04-30]
+
 * The configure script fails on OS/390 (z/OS) Unix.
 
 [This has been fixed in z/OS V1R3 (aka OS/390 R13).]
@@ -1019,46 +1218,17 @@ destructors do actually work properly):
 
 ----------------------------------------------------------------------
 
-* I get errors when I try to compile groff with DEC C++.
-
-Fix the declaration of write() in <unistd.h> so that the second
-argument is a const char *.  Fix the declaration of open() in
-<sys/file.h> so that the first argument is a const char *.
-
-----------------------------------------------------------------------
-
-* On a host using Unix make (e.g. Solaris), if you are compiling for
-  multiple architectures by building in a subdirectory, the make stops
-  with a message like this:
-
-    make: Fatal error: Don't know how to make target `assert.o'
-
-  or like this:
-
-    make: Fatal error: Can't find /u/src/groff/src/include/Makefile.sub': No 
such file or directory
+[groff 1.15]
 
-This occurs because GNU make and Unix make handle VPATH differently,
-and the groff build relies on GNU make's VPATH handling.
+* I get errors when I try to compile groff with Forte Development 6
+  or 6u1, or Sun C++ version 5.0 through 5.2.
 
-Use GNU make <http://www.gnu.org/software/make/> to work around this.
-In Solaris 8 and 9, GNU make is on the Software Companion CD in
-package SFWgmake and is installed as /opt/sfw/bin/gmake.  Prebuilt
-versions of GNU make for Solaris are also available from
-sunfreeware.com.
+This is a known problem; see Sun bug #4301919.  See Sun patches
+109482, 109490, 109508, and 109509 for fixes.
 
 ----------------------------------------------------------------------
 
-* On Ultrix, the make program stops with the message
-
-    *** Error code 1
-
-    Stop.
-
-  for no apparent reason.
-
-Use GNU make.
-
-----------------------------------------------------------------------
+[groff 1.08]
 
 * I'm having problems compiling groff on 386BSD 0.1.
 
@@ -1098,6 +1268,30 @@ instead.
 
 ----------------------------------------------------------------------
 
+[groff 1.07]
+
+* I get errors when I try to compile groff with DEC C++.
+
+Fix the declaration of write() in <unistd.h> so that the second
+argument is a const char *.  Fix the declaration of open() in
+<sys/file.h> so that the first argument is a const char *.
+
+----------------------------------------------------------------------
+
+* On Ultrix, the make program stops with the message
+
+    *** Error code 1
+
+    Stop.
+
+  for no apparent reason.
+
+Use GNU make.
+
+----------------------------------------------------------------------
+
+[groff 1.01]
+
 * I get errors when I try to compile groff with Sun C++ version 3 or
   earlier.
 
@@ -1117,115 +1311,7 @@ to be `void (*)(int)'.
 You can either change them in place, or copy them to some other
 directory and include that directory with a -I option.
 
-----------------------------------------------------------------------
-
-* I get errors when I try to compile groff with Forte Development 6
-  or 6u1, or Sun C++ version 5.0 through 5.2.
-
-This is a known problem; see Sun bug #4301919.  See Sun patches
-109482, 109490, 109508, and 109509 for fixes.
-
-----------------------------------------------------------------------
-
-* I get warnings from the Sun linker while using gcc 3.4.0:
-
-  ld: warning: relocation error: R_SPARC_UA32:
-      file groff/src/libs/libgroff/libgroff.a(getopt.o): symbol optarg:
-      external symbolic relocation against non-allocatable
-      section .debug_info; cannot be processed at runtime:
-      relocation ignored
-
-This seems to be a known problem (Sun bugs #4910101 and #4910810,
-filed in September 2003; gcc bug #15599, filed May 2004) without a
-public fix as of this writing.  A work-around is to use option
-`-gstabs+' instead of `-g' (and a high probability that the output is
-only debuggable with gdb but not with Sun's debuggers).
-
-----------------------------------------------------------------------
-
-* In MacOS X, I want to completely replace the groff that came with
-  the system.
-
-Use
-
-  ./configure --prefix=/usr --mandir=/usr/share/man
-
-then
-
-  make
-  make install
-
-Note that subsequent system updates may replace your groff.
-
-----------------------------------------------------------------------
-
-* When compiling on MacOS X 10.2, groff compiles but does not run
-  well, especially `eqn', causing many `can't break line' messages.
-
-Use
-
-  ./configure CXX=g++2
-
-then
-
-  make
-
-as usual.
-
-----------------------------------------------------------------------
-
-* Configuration on MacOS X 10.6 doesn't succeed.
-
-Use
-
-  ./configure CXX=g++-4.2
-
-----------------------------------------------------------------------
-
-* When compiling on NetBSD, make issues warnings like
-
-  Warning: line 28: Unable to locate font(s)
-  URWGothicL-Demi,a010015l.pfb on the given path(s)
-
-  and
-
-  Warning: line 77: Failed to create groff font 'U-AB' by running
-  afmtodit
-
-In this case install the package "urw-fonts":
-
-  pkgin install urw-fonts
-
-and make the font path known to ghostscript, e.g. with (ksh):
-
-  export GS_LIB=/usr/pkg/share/fonts/urw
-
-----------------------------------------------------------------------
-
-* Currently (December 2015) building groff fails on NetBSD and
-  FreeBSD with the message:
-
-  make[1]: don't know how to make contrib/chem/chem.1. Stop
-
-The reason is a bug in the make(1) tool used on those systems related
-to .SUFFIXES lines.
-
-A temporary workaround is to change the Makefile line
-
-  .SUFFIXES: .roff .in .ps .mom .pdf .me .ms .ps .html .txt .texi \
-    .dvi .pdf .xhtml .man .c .cpp .log .o .obj .sed .sin \
-    .test .test$(EXEEXT) .trs .ypp
-
-into
-
-  .SUFFIXES: .man .roff .in .ps .mom .pdf .me .ms .ps .html .txt \
-    .texi .dvi .pdf .xhtml .c .cpp .log .o .obj .sed .sin \
-    .test .test$(EXEEXT) .trs .ypp
-
-(put .man at begin of the list).
 
-The bug is reported to the maintainer of the make(1) tool of those
-systems.
 
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