dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
-dnl Copyright (C) 2007-2020 Free Software Foundation, Inc.
+dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl Written by Eric Blake.
-# wchar_h.m4 serial 46
+# wchar_h.m4 serial 50
AC_DEFUN([gl_WCHAR_H],
[
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[
-/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
- <wchar.h>.
- BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
- included before <wchar.h>. */
-#if !(defined __GLIBC__ && !defined __UCLIBC__)
-# include <stddef.h>
-# include <stdio.h>
-# include <time.h>
-#endif
-#include <wchar.h>
+ #include <wchar.h>
]],
[btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb
wcsrtombs wcsnrtombs wcwidth
])
AC_REQUIRE([AC_C_RESTRICT])
+
+ AC_CHECK_DECLS([wcsdup], [], [], [[
+ #include <wchar.h>
+ ]])
+ if test $ac_cv_have_decl_wcsdup = no; then
+ HAVE_DECL_WCSDUP=0
+ fi
])
dnl Check whether <wchar.h> is usable at all.
dnl and <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary,
dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and
dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>.
+ AC_REQUIRE([AC_CANONICAL_HOST])
AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly],
[gl_cv_header_wchar_h_correct_inline],
[gl_cv_header_wchar_h_correct_inline=yes
- AC_LANG_CONFTEST([
- AC_LANG_SOURCE([[#define wcstod renamed_wcstod
-/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
- <wchar.h>.
- BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
- included before <wchar.h>. */
-#include <stddef.h>
-#include <stdio.h>
-#include <time.h>
-#include <wchar.h>
-extern int zero (void);
-int main () { return zero(); }
-]])])
- dnl Do not rename the object file from conftest.$ac_objext to
- dnl conftest1.$ac_objext, as this will cause the link to fail on
- dnl z/OS when using the XPLINK object format (due to duplicate
- dnl CSECT names). Instead, temporarily redefine $ac_compile so
- dnl that the object file has the latter name from the start.
- save_ac_compile="$ac_compile"
- ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest1/`
- if echo '#include "conftest.c"' >conftest1.c &&
- AC_TRY_EVAL([ac_compile]); then
- AC_LANG_CONFTEST([
- AC_LANG_SOURCE([[#define wcstod renamed_wcstod
-/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
- <wchar.h>.
- BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
- included before <wchar.h>. */
-#include <stddef.h>
-#include <stdio.h>
-#include <time.h>
-#include <wchar.h>
-int zero (void) { return 0; }
-]])])
- dnl See note above about renaming object files.
- ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest2/`
- if echo '#include "conftest.c"' >conftest2.c &&
- AC_TRY_EVAL([ac_compile]); then
- if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
- :
- else
- gl_cv_header_wchar_h_correct_inline=no
+ case "$host_os" in
+ *-gnu* | gnu*)
+ AC_LANG_CONFTEST([
+ AC_LANG_SOURCE([[
+ #define wcstod renamed_wcstod
+ #include <wchar.h>
+ extern int zero (void);
+ int main () { return zero(); }
+ ]])])
+ dnl Do not rename the object file from conftest.$ac_objext to
+ dnl conftest1.$ac_objext, as this will cause the link to fail on
+ dnl z/OS when using the XPLINK object format (due to duplicate
+ dnl CSECT names). Instead, temporarily redefine $ac_compile so
+ dnl that the object file has the latter name from the start.
+ save_ac_compile="$ac_compile"
+ ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest1/`
+ if echo '#include "conftest.c"' >conftest1.c \
+ && AC_TRY_EVAL([ac_compile]); then
+ AC_LANG_CONFTEST([
+ AC_LANG_SOURCE([[
+ #define wcstod renamed_wcstod
+ #include <wchar.h>
+ int zero (void) { return 0; }
+ ]])])
+ dnl See note above about renaming object files.
+ ac_compile=`echo "$save_ac_compile" | sed s/conftest/conftest2/`
+ if echo '#include "conftest.c"' >conftest2.c \
+ && AC_TRY_EVAL([ac_compile]); then
+ if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
+ :
+ else
+ gl_cv_header_wchar_h_correct_inline=no
+ fi
+ fi
fi
- fi
- fi
- ac_compile="$save_ac_compile"
- rm -f conftest[12].c conftest[12].$ac_objext conftest$ac_exeext
+ ac_compile="$save_ac_compile"
+ rm -f conftest[12].c conftest[12].$ac_objext conftest$ac_exeext
+ ;;
+ esac
])
if test $gl_cv_header_wchar_h_correct_inline = no; then
AC_MSG_ERROR([<wchar.h> cannot be used with this compiler ($CC $CFLAGS $CPPFLAGS).
GNULIB_WCSTOK=0; AC_SUBST([GNULIB_WCSTOK])
GNULIB_WCSWIDTH=0; AC_SUBST([GNULIB_WCSWIDTH])
GNULIB_WCSFTIME=0; AC_SUBST([GNULIB_WCSFTIME])
+ dnl Support Microsoft deprecated alias function names by default.
+ GNULIB_MDA_WCSDUP=1; AC_SUBST([GNULIB_MDA_WCSDUP])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
HAVE_WCSWIDTH=1; AC_SUBST([HAVE_WCSWIDTH])
HAVE_WCSFTIME=1; AC_SUBST([HAVE_WCSFTIME])
HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
+ HAVE_DECL_WCSDUP=1; AC_SUBST([HAVE_DECL_WCSDUP])
HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
REPLACE_BTOWC=0; AC_SUBST([REPLACE_BTOWC])
projects / deliverable / binutils-gdb.git / blobdiff