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Re: libiconv detection failure
From: |
Daiki Ueno |
Subject: |
Re: libiconv detection failure |
Date: |
Tue, 21 Oct 2014 18:30:21 +0900 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux) |
Werner LEMBERG <address@hidden> writes:
>>> Given that the intention of the above test is to check if the iconv
>>> function works properly, maybe a workaround would be to use the
>>> fixed prototype of iconv (as attached)?
>>
>> Sorry, that was obviously wrong. The other idea is to suppress the
>> error with a pragma, but I guess it would be better to actually
>> check the prototype in AM_ICONV_LINK.
>
> What about using m4_foreach, running the link tests with and without
> `const'?
Thanks for the tip. The attached patch seems to work with both cases.
Regards,
--
Daiki Ueno
>From fb53151f8c9456f186b2f192c02bd45e85c35476 Mon Sep 17 00:00:00 2001
From: Daiki Ueno <address@hidden>
Date: Tue, 21 Oct 2014 18:07:00 +0900
Subject: [PATCH] iconv: avoid false detection of non-working iconv
The INBUF/OUTBUF arguments of iconv can be either 'const char **'
or 'char **'. If CC is g++, the difference causes a compile error
and thus leads to a false detection of non-working iconv.
Reported by Eli Zaretskii and Werner LEMBERG in:
<https://lists.gnu.org/archive/html/bug-gnulib/2014-10/msg00023.html>.
* m4/iconv.m4 (AM_ICONV_LINK): Try all possible argument types of
iconv. Bump serial number.
---
ChangeLog | 11 +++++++++++
m4/iconv.m4 | 52 ++++++++++++++++++++++++++--------------------------
2 files changed, 37 insertions(+), 26 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 23234b7..49639fd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2014-10-21 Daiki Ueno <address@hidden>
+
+ iconv: avoid false detection of non-working iconv
+ The INBUF/OUTBUF arguments of iconv can be either 'const char **'
+ or 'char **'. If CC is g++, the difference causes a compile error
+ and thus leads to a false detection of non-working iconv.
+ Reported by Eli Zaretskii and Werner LEMBERG in:
+ <https://lists.gnu.org/archive/html/bug-gnulib/2014-10/msg00023.html>.
+ * m4/iconv.m4 (AM_ICONV_LINK): Try all possible argument types of
+ iconv. Bump serial number.
+
2014-10-18 Paul Eggert <address@hidden>
symlinkat: port to AIX 7.1
diff --git a/m4/iconv.m4 b/m4/iconv.m4
index 4b29c5f..9726a33 100644
--- a/m4/iconv.m4
+++ b/m4/iconv.m4
@@ -1,4 +1,4 @@
-# iconv.m4 serial 18 (gettext-0.18.2)
+# iconv.m4 serial 19 (gettext-0.18.2)
dnl Copyright (C) 2000-2002, 2007-2014 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -72,13 +72,16 @@ AC_DEFUN([AM_ICONV_LINK],
if test $am_cv_lib_iconv = yes; then
LIBS="$LIBS $LIBICONV"
fi
- AC_RUN_IFELSE(
- [AC_LANG_SOURCE([[
+ am_cv_func_iconv_works=no
+ m4_foreach([gl_iconv_buf_t], [[char **], [const char **]], [
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
#include <iconv.h>
#include <string.h>
-int main ()
-{
- int result = 0;
+
+typedef] gl_iconv_buf_t [gl_iconv_buf_t;]],
+ [[int result = 0;
/* Test against AIX 5.1 bug: Failures are not distinguishable from successful
returns. */
{
@@ -92,8 +95,8 @@ int main ()
char *outptr = buf;
size_t outbytesleft = sizeof (buf);
size_t res = iconv (cd_utf8_to_88591,
- (char **) &inptr, &inbytesleft,
- &outptr, &outbytesleft);
+ (gl_iconv_buf_t) &inptr, &inbytesleft,
+ (gl_iconv_buf_t) &outptr, &outbytesleft);
if (res == 0)
result |= 1;
iconv_close (cd_utf8_to_88591);
@@ -112,8 +115,8 @@ int main ()
char *outptr = buf;
size_t outbytesleft = sizeof (buf);
size_t res = iconv (cd_ascii_to_88591,
- (char **) &inptr, &inbytesleft,
- &outptr, &outbytesleft);
+ (gl_iconv_buf_t) &inptr, &inbytesleft,
+ (gl_iconv_buf_t) &outptr, &outbytesleft);
if (res == 0)
result |= 2;
iconv_close (cd_ascii_to_88591);
@@ -131,8 +134,8 @@ int main ()
char *outptr = buf;
size_t outbytesleft = 1;
size_t res = iconv (cd_88591_to_utf8,
- (char **) &inptr, &inbytesleft,
- &outptr, &outbytesleft);
+ (gl_iconv_buf_t) &inptr, &inbytesleft,
+ (gl_iconv_buf_t) &outptr, &outbytesleft);
if (res != (size_t)(-1) || outptr - buf > 1 || buf[1] != (char)0xAD)
result |= 4;
iconv_close (cd_88591_to_utf8);
@@ -151,8 +154,8 @@ int main ()
char *outptr = buf;
size_t outbytesleft = sizeof (buf);
size_t res = iconv (cd_88591_to_utf8,
- (char **) &inptr, &inbytesleft,
- &outptr, &outbytesleft);
+ (gl_iconv_buf_t) &inptr, &inbytesleft,
+ (gl_iconv_buf_t) &outptr, &outbytesleft);
if ((int)res > 0)
result |= 8;
iconv_close (cd_88591_to_utf8);
@@ -171,18 +174,15 @@ int main ()
&& iconv_open ("utf8", "eucJP") == (iconv_t)(-1))
result |= 16;
return result;
-}]])],
- [am_cv_func_iconv_works=yes],
- [am_cv_func_iconv_works=no],
- [
-changequote(,)dnl
- case "$host_os" in
- aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
- *) am_cv_func_iconv_works="guessing yes" ;;
- esac
-changequote([,])dnl
- ])
- LIBS="$am_save_LIBS"
+]])],
+ [am_cv_func_iconv_works=yes], , [am_cv_func_iconv_works=cross])])
+ if test "$am_cv_func_iconv_works" = "cross"; then
+ case "$host_os" in
+ aix* | hpux*) am_cv_func_iconv_works="guessing no" ;;
+ *) am_cv_func_iconv_works="guessing yes" ;;
+ esac
+ fi
+ LIBS="$am_save_LIBS"
])
case "$am_cv_func_iconv_works" in
*no) am_func_iconv=no am_cv_lib_iconv=no ;;
--
1.9.3
- libiconv detection failure, Werner LEMBERG, 2014/10/20
- Re: libiconv detection failure, Daiki Ueno, 2014/10/21
- Re: libiconv detection failure, Daiki Ueno, 2014/10/21
- Re: libiconv detection failure, Werner LEMBERG, 2014/10/21
- Re: libiconv detection failure,
Daiki Ueno <=
- Re: libiconv detection failure, Werner LEMBERG, 2014/10/21
- Re: libiconv detection failure, Eli Zaretskii, 2014/10/21
- Re: libiconv detection failure, Werner LEMBERG, 2014/10/22
- Re: libiconv detection failure, Eli Zaretskii, 2014/10/22
- Re: libiconv detection failure, Eric Blake, 2014/10/21
- Re: libiconv detection failure, Daiki Ueno, 2014/10/21
- Re: libiconv detection failure, Eli Zaretskii, 2014/10/22
- Re: libiconv detection failure, Daiki Ueno, 2014/10/23
- Re: libiconv detection failure, Eli Zaretskii, 2014/10/23
- Re: libiconv detection failure, Daiki Ueno, 2014/10/23