diff options
Diffstat (limited to 'm4/iconv.m4')
| -rw-r--r-- | m4/iconv.m4 | 101 |
1 files changed, 53 insertions, 48 deletions
diff --git a/m4/iconv.m4 b/m4/iconv.m4 index e593b72..2a7edd3 100644 --- a/m4/iconv.m4 +++ b/m4/iconv.m4 @@ -1,5 +1,5 @@ -# iconv.m4 serial 21 -dnl Copyright (C) 2000-2002, 2007-2014, 2016-2020 Free Software Foundation, +# iconv.m4 serial 27 +dnl Copyright (C) 2000-2002, 2007-2014, 2016-2024 Free Software Foundation, dnl Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -7,6 +7,12 @@ dnl with or without modifications, as long as this notice is preserved. dnl From Bruno Haible. +AC_PREREQ([2.64]) + +dnl Note: AM_ICONV is documented in the GNU gettext manual +dnl <https://www.gnu.org/software/gettext/manual/html_node/AM_005fICONV.html>. +dnl Don't make changes that are incompatible with that documentation! + AC_DEFUN([AM_ICONV_LINKFLAGS_BODY], [ dnl Prerequisites of AC_LIB_LINKFLAGS_BODY. @@ -32,7 +38,7 @@ AC_DEFUN([AM_ICONV_LINK], dnl because if the user has installed libiconv and not disabled its use dnl via --without-libiconv-prefix, he wants to use it. The first dnl AC_LINK_IFELSE will then fail, the second AC_LINK_IFELSE will succeed. - am_save_CPPFLAGS="$CPPFLAGS" + gl_saved_CPPFLAGS="$CPPFLAGS" AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCICONV]) AC_CACHE_CHECK([for iconv], [am_cv_func_iconv], [ @@ -49,7 +55,7 @@ AC_DEFUN([AM_ICONV_LINK], iconv_close(cd);]])], [am_cv_func_iconv=yes]) if test "$am_cv_func_iconv" != yes; then - am_save_LIBS="$LIBS" + gl_saved_LIBS="$LIBS" LIBS="$LIBS $LIBICONV" AC_LINK_IFELSE( [AC_LANG_PROGRAM( @@ -62,14 +68,14 @@ AC_DEFUN([AM_ICONV_LINK], iconv_close(cd);]])], [am_cv_lib_iconv=yes] [am_cv_func_iconv=yes]) - LIBS="$am_save_LIBS" + LIBS="$gl_saved_LIBS" fi ]) if test "$am_cv_func_iconv" = yes; then AC_CACHE_CHECK([for working iconv], [am_cv_func_iconv_works], [ dnl This tests against bugs in AIX 5.1, AIX 6.1..7.1, HP-UX 11.11, dnl Solaris 10. - am_save_LIBS="$LIBS" + gl_saved_LIBS="$LIBS" if test $am_cv_lib_iconv = yes; then LIBS="$LIBS $LIBICONV" fi @@ -86,8 +92,9 @@ AC_DEFUN([AM_ICONV_LINK], #endif ]], [[int result = 0; - /* Test against AIX 5.1 bug: Failures are not distinguishable from successful - returns. */ + /* Test against AIX 5.1...7.2 bug: Failures are not distinguishable from + successful returns. This is even documented in + <https://www.ibm.com/support/knowledgecenter/ssw_aix_72/i_bostechref/iconv.html> */ { iconv_t cd_utf8_to_88591 = iconv_open ("ISO8859-1", "UTF-8"); if (cd_utf8_to_88591 != (iconv_t)(-1)) @@ -198,7 +205,7 @@ AC_DEFUN([AM_ICONV_LINK], esac]) test "$am_cv_func_iconv_works" = no || break done - LIBS="$am_save_LIBS" + LIBS="$gl_saved_LIBS" ]) case "$am_cv_func_iconv_works" in *no) am_func_iconv=no am_cv_lib_iconv=no ;; @@ -217,7 +224,7 @@ AC_DEFUN([AM_ICONV_LINK], else dnl If $LIBICONV didn't lead to a usable library, we don't need $INCICONV dnl either. - CPPFLAGS="$am_save_CPPFLAGS" + CPPFLAGS="$gl_saved_CPPFLAGS" LIBICONV= LTLIBICONV= fi @@ -225,64 +232,62 @@ AC_DEFUN([AM_ICONV_LINK], AC_SUBST([LTLIBICONV]) ]) -dnl Define AM_ICONV using AC_DEFUN_ONCE for Autoconf >= 2.64, in order to -dnl avoid warnings like +dnl Define AM_ICONV using AC_DEFUN_ONCE, in order to avoid warnings like dnl "warning: AC_REQUIRE: `AM_ICONV' was expanded before it was required". -dnl This is tricky because of the way 'aclocal' is implemented: -dnl - It requires defining an auxiliary macro whose name ends in AC_DEFUN. -dnl Otherwise aclocal's initial scan pass would miss the macro definition. -dnl - It requires a line break inside the AC_DEFUN_ONCE and AC_DEFUN expansions. -dnl Otherwise aclocal would emit many "Use of uninitialized value $1" -dnl warnings. -m4_define([gl_iconv_AC_DEFUN], - m4_version_prereq([2.64], - [[AC_DEFUN_ONCE( - [$1], [$2])]], - [m4_ifdef([gl_00GNULIB], - [[AC_DEFUN_ONCE( - [$1], [$2])]], - [[AC_DEFUN( - [$1], [$2])]])])) -gl_iconv_AC_DEFUN([AM_ICONV], +AC_DEFUN_ONCE([AM_ICONV], [ AM_ICONV_LINK if test "$am_cv_func_iconv" = yes; then - AC_MSG_CHECKING([for iconv declaration]) - AC_CACHE_VAL([am_cv_proto_iconv], [ - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM( - [[ + AC_CACHE_CHECK([whether iconv is compatible with its POSIX signature], + [gl_cv_iconv_nonconst], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[ #include <stdlib.h> #include <iconv.h> extern #ifdef __cplusplus "C" #endif -#if defined(__STDC__) || defined(_MSC_VER) || defined(__cplusplus) size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft); -#else -size_t iconv(); -#endif - ]], - [[]])], - [am_cv_proto_iconv_arg1=""], - [am_cv_proto_iconv_arg1="const"]) - am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"]) - am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'` - AC_MSG_RESULT([ - $am_cv_proto_iconv]) + ]], + [[]])], + [gl_cv_iconv_nonconst=yes], + [gl_cv_iconv_nonconst=no]) + ]) else dnl When compiling GNU libiconv on a system that does not have iconv yet, dnl pick the POSIX compliant declaration without 'const'. - am_cv_proto_iconv_arg1="" + gl_cv_iconv_nonconst=yes + fi + if test $gl_cv_iconv_nonconst = yes; then + iconv_arg1="" + else + iconv_arg1="const" fi - AC_DEFINE_UNQUOTED([ICONV_CONST], [$am_cv_proto_iconv_arg1], + AC_DEFINE_UNQUOTED([ICONV_CONST], [$iconv_arg1], [Define as const if the declaration of iconv() needs const.]) dnl Also substitute ICONV_CONST in the gnulib generated <iconv.h>. m4_ifdef([gl_ICONV_H_DEFAULTS], [AC_REQUIRE([gl_ICONV_H_DEFAULTS]) - if test -n "$am_cv_proto_iconv_arg1"; then + if test $gl_cv_iconv_nonconst != yes; then ICONV_CONST="const" fi ]) + + dnl A summary result, for those packages which want to print a summary at the + dnl end of the configuration. + if test "$am_func_iconv" = yes; then + if test -n "$LIBICONV"; then + am_cv_func_iconv_summary='yes, in libiconv' + else + am_cv_func_iconv_summary='yes, in libc' + fi + else + if test "$am_cv_func_iconv" = yes; then + am_cv_func_iconv_summary='not working, consider installing GNU libiconv' + else + am_cv_func_iconv_summary='no, consider installing GNU libiconv' + fi + fi ]) |