dnl Written by Eric Blake.
-# wchar_h.m4 serial 46
+# wchar_h.m4 serial 47
AC_DEFUN([gl_WCHAR_H],
[
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
+ case "$host_os" in
+ *-gnu* | gnu*)
+ AC_LANG_CONFTEST([
+ AC_LANG_SOURCE([[#define wcstod renamed_wcstod
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
extern int zero (void);
int main () { return zero(); }
]])])
- dnl Do not rename the object file from conftest.$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 "$save_ac_compile" | sed s/conftest/conftest1/`
- if echo '#include "conftest.c"' >conftest1.c &&
- AC_TRY_EVAL([ac_compile]); then
- AC_LANG_CONFTEST([
- AC_LANG_SOURCE([[#define wcstod renamed_wcstod
+ dnl Do not rename the object file from conftest.$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 "$save_ac_compile" | sed s/conftest/conftest1/`
+ if echo '#include "conftest.c"' >conftest1.c \
+ && AC_TRY_EVAL([ac_compile]); then
+ AC_LANG_CONFTEST([
+ AC_LANG_SOURCE([[#define wcstod renamed_wcstod
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
#include <wchar.h>
int zero (void) { return 0; }
]])])
- dnl See note above about renaming object files.
- ac_compile=`echo "$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 $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
- :
- else
- gl_cv_header_wchar_h_correct_inline=no
+ dnl See note above about renaming object files.
+ ac_compile=`echo "$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).