dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
-dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
+dnl Copyright (C) 2007-2009 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.m4 serial 22
+# wchar.m4 serial 28
AC_DEFUN([gl_WCHAR_H],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+ AC_REQUIRE([gl_WCHAR_H_INLINE_OK])
AC_CACHE_CHECK([whether <wchar.h> is standalone],
[gl_cv_header_wchar_h_standalone],
[AC_COMPILE_IFELSE([[#include <wchar.h>
fi
AC_SUBST([HAVE_WINT_T])
- if test $gl_cv_header_wchar_h_standalone != yes || test $gt_cv_c_wint_t != yes; then
- WCHAR_H=wchar.h
- fi
+ dnl If <stddef.h> is replaced, then <wchar.h> must also be replaced.
+ AC_REQUIRE([gl_STDDEF_H])
dnl Prepare for creating substitute <wchar.h>.
dnl Do it always: WCHAR_H may be empty here but can be set later.
HAVE_WCHAR_H=0
fi
AC_SUBST([HAVE_WCHAR_H])
+ dnl Execute this unconditionally, because WCHAR_H may be set by other
+ dnl modules, after this code is executed.
gl_CHECK_NEXT_HEADERS([wchar.h])
])
+dnl Check whether <wchar.h> is usable at all.
+AC_DEFUN([gl_WCHAR_H_INLINE_OK],
+[
+ dnl Test whether <wchar.h> suffers due to the transition from '__inline' to
+ dnl 'gnu_inline'. See <http://sourceware.org/bugzilla/show_bug.cgi?id=4022>
+ dnl and <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary,
+ dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and
+ dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>.
+ AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly],
+ [gl_cv_header_wchar_h_correct_inline],
+ [gl_cv_header_wchar_h_correct_inline=yes
+ AC_LANG_CONFTEST([
+ AC_LANG_SOURCE([[#define wcstod renamed_wcstod
+#include <wchar.h>
+extern int zero (void);
+int main () { return zero(); }
+]])])
+ if AC_TRY_EVAL([ac_compile]); then
+ mv conftest.$ac_objext conftest1.$ac_objext
+ AC_LANG_CONFTEST([
+ AC_LANG_SOURCE([[#define wcstod renamed_wcstod
+#include <wchar.h>
+int zero (void) { return 0; }
+]])])
+ if AC_TRY_EVAL([ac_compile]); then
+ mv conftest.$ac_objext conftest2.$ac_objext
+ if $CC -o conftest$ac_exeext $CFLAGS $LDFLAGS conftest1.$ac_objext conftest2.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then
+ :
+ else
+ gl_cv_header_wchar_h_correct_inline=no
+ fi
+ fi
+ fi
+ rm -f conftest1.$ac_objext conftest2.$ac_objext conftest$ac_exeext
+ ])
+ 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).
+This is a known interoperability problem of glibc <= 2.5 with gcc >= 4.3 in
+C99 mode. You have four options:
+ - Add the flag -fgnu89-inline to CC and reconfigure, or
+ - Fix your include files, using parts of
+ <http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, or
+ - Use a gcc version older than 4.3, or
+ - Don't use the flags -std=c99 or -std=gnu99.
+Configuration aborted.])
+ fi
+])
+
dnl Unconditionally enables the replacement of <wchar.h>.
AC_DEFUN([gl_REPLACE_WCHAR_H],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
- WCHAR_H=wchar.h
+ :
])
AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
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_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
- HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
- HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
- HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
- HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB])
- HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS])
- HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS])
- HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
- 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])
- REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
- REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
- REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
- REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN])
- REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
- REPLACE_MBSNRTOWCS=0;AC_SUBST([REPLACE_MBSNRTOWCS])
- REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
- REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
- REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
- WCHAR_H=''; AC_SUBST([WCHAR_H])
+ HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
+ HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
+ HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
+ HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
+ HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
+ HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
+ HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB])
+ HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS])
+ HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS])
+ HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
+ 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])
+ REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
+ REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
+ REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
+ REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN])
+ REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
+ REPLACE_MBSNRTOWCS=0; AC_SUBST([REPLACE_MBSNRTOWCS])
+ REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
+ REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
+ REPLACE_WCSNRTOMBS=0; AC_SUBST([REPLACE_WCSNRTOMBS])
+ REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
])
projects / gnulib.git / blobdiff