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Re: Libtool und --coverage
From: |
Ralf Wildenhues |
Subject: |
Re: Libtool und --coverage |
Date: |
Fri, 25 Aug 2006 17:08:42 +0200 |
User-agent: |
Mutt/1.5.12 (2006-08-10) |
Hello Rainer, all,
Apologies for the delay.
Newer(?) GCC have an option --coverage:
| `--coverage'
| This option is used to compile and link code instrumented for
| coverage analysis. The option is a synonym for `-fprofile-arcs'
| `-ftest-coverage' (when compiling) and `-lgcov' (when linking).
| See the documentation for those options for more details.
If I understand correctly, it is possible to link together objects with
and without this profiling; thus, --coverage need not be an inherited
linker flag. But above explains that we should allow it through to the
compiler driver for shared library creation (not in linker_flags, this
is not valid for $LD). Note that -fprofile-arcs and -ftest-coverage are
not needed/used for the link step.
I've applied the patches below to HEAD and branch-1-5, respectively.
Cheers, and thanks for the report,
Ralf
HEAD:
* libltdl/config/ltmain.m4sh (func_mode_link): Pass through
`--coverage' and `-pg', for GCC. Report by Rainer Keller
<address@hidden> and Tor Lillqvist <address@hidden>.
Index: libltdl/config/ltmain.m4sh
===================================================================
RCS file: /cvsroot/libtool/libtool/libltdl/config/ltmain.m4sh,v
retrieving revision 1.51
diff -u -r1.51 ltmain.m4sh
--- libltdl/config/ltmain.m4sh 23 Aug 2006 17:57:34 -0000 1.51
+++ libltdl/config/ltmain.m4sh 25 Aug 2006 15:06:15 -0000
@@ -2903,9 +2901,10 @@
# -q* pass through compiler args for the IBM compiler
# -m*, -t[45]*, -txscale* pass through architecture-specific
# compiler args for GCC
+ # -pg, --coverage pass through profiling flag for GCC
# @file GCC response files
-64|-mips[[0-9]]|-r[[0-9]][[0-9]]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
- -t[[45]]*|-txscale*|@*)
+ -t[[45]]*|-txscale*|-pg|--coverage|@*)
func_quote_for_eval "$arg"
arg="$func_quote_for_eval_result"
func_append compile_command " $arg"
branch-1-5:
* ltmain.in (link mode): Pass through `--coverage', for GCC.
Report by Rainer Keller <address@hidden>.
Index: ltmain.in
===================================================================
RCS file: /cvsroot/libtool/libtool/Attic/ltmain.in,v
retrieving revision 1.334.2.133
diff -u -r1.334.2.133 ltmain.in
--- ltmain.in 7 Aug 2006 16:25:31 -0000 1.334.2.133
+++ ltmain.in 25 Aug 2006 15:06:33 -0000
@@ -1660,10 +1660,10 @@
# -m* pass through architecture-specific compiler args for GCC
# -m*, -t[45]*, -txscale* pass through architecture-specific
# compiler args for GCC
- # -pg pass through profiling flag for GCC
+ # -pg, --coverage pass through profiling flag for GCC
# @file GCC response files
- -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*|-pg| \
- -t[45]*|-txscale*|@*)
+ -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
+ -t[45]*|-txscale*|-pg|--coverage|@*)
# Unknown arguments in both finalize_command and compile_command need
# to be aesthetically quoted because they are evaled later.
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