| dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues. |
| |
| 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 50 |
| |
| AC_DEFUN([gl_WCHAR_H], |
| [ |
| AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) |
| AC_REQUIRE([gl_WCHAR_H_INLINE_OK]) |
| dnl Prepare for creating substitute <wchar.h>. |
| dnl Check for <wchar.h> (missing in Linux uClibc when built without wide |
| dnl character support). |
| dnl <wchar.h> is always overridden, because of GNULIB_POSIXCHECK. |
| gl_CHECK_NEXT_HEADERS([wchar.h]) |
| if test $ac_cv_header_wchar_h = yes; then |
| HAVE_WCHAR_H=1 |
| else |
| HAVE_WCHAR_H=0 |
| fi |
| AC_SUBST([HAVE_WCHAR_H]) |
| |
| AC_REQUIRE([gl_FEATURES_H]) |
| |
| AC_REQUIRE([gt_TYPE_WINT_T]) |
| if test $gt_cv_c_wint_t = yes; then |
| HAVE_WINT_T=1 |
| else |
| HAVE_WINT_T=0 |
| fi |
| AC_SUBST([HAVE_WINT_T]) |
| |
| AC_REQUIRE([gl_TYPE_WINT_T_PREREQ]) |
| |
| 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([[ |
| #include <wchar.h> |
| ]], |
| [btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb |
| wcsrtombs wcsnrtombs wcwidth |
| wmemchr wmemcmp wmemcpy wmemmove wmempcpy wmemset |
| wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat wcscmp |
| wcsncmp wcscasecmp wcsncasecmp wcscoll wcsxfrm wcsdup wcschr wcsrchr |
| wcscspn wcsspn wcspbrk wcsstr wcstok wcswidth wcsftime |
| ]) |
| |
| AC_REQUIRE([AC_C_RESTRICT]) |
| |
| AC_CHECK_DECLS([wcsdup], [], [], [[ |
| #include <wchar.h> |
| ]]) |
| if test $ac_cv_have_decl_wcsdup = no; then |
| HAVE_DECL_WCSDUP=0 |
| fi |
| ]) |
| |
| dnl Check whether <wchar.h> is usable at all. |
| AC_DEFUN([gl_WCHAR_H_INLINE_OK], |
| [ |
| dnl Test whether <wchar.h> suffers due to the transition from '__inline' to |
| dnl 'gnu_inline'. See <https://sourceware.org/bugzilla/show_bug.cgi?id=4022> |
| dnl and <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. In summary, |
| dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and |
| dnl the option -std=c99 or -std=gnu99, leads to a broken <wchar.h>. |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| AC_CACHE_CHECK([whether <wchar.h> uses 'inline' correctly], |
| [gl_cv_header_wchar_h_correct_inline], |
| [gl_cv_header_wchar_h_correct_inline=yes |
| case "$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 $LIBS >&AS_MESSAGE_LOG_FD 2>&1; then |
| : |
| else |
| gl_cv_header_wchar_h_correct_inline=no |
| fi |
| fi |
| fi |
| ac_compile="$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). |
| 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 |
| <https://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 |
| ]) |
| |
| AC_DEFUN([gl_WCHAR_MODULE_INDICATOR], |
| [ |
| dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) |
| gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
| dnl Define it also as a C macro, for the benefit of the unit tests. |
| gl_MODULE_INDICATOR_FOR_TESTS([$1]) |
| ]) |
| |
| AC_DEFUN([gl_WCHAR_H_DEFAULTS], |
| [ |
| GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC]) |
| GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB]) |
| GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT]) |
| GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC]) |
| GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN]) |
| GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS]) |
| GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS]) |
| GNULIB_WCRTOMB=0; AC_SUBST([GNULIB_WCRTOMB]) |
| GNULIB_WCSRTOMBS=0; AC_SUBST([GNULIB_WCSRTOMBS]) |
| GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS]) |
| GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH]) |
| GNULIB_WMEMCHR=0; AC_SUBST([GNULIB_WMEMCHR]) |
| GNULIB_WMEMCMP=0; AC_SUBST([GNULIB_WMEMCMP]) |
| GNULIB_WMEMCPY=0; AC_SUBST([GNULIB_WMEMCPY]) |
| GNULIB_WMEMMOVE=0; AC_SUBST([GNULIB_WMEMMOVE]) |
| GNULIB_WMEMPCPY=0; AC_SUBST([GNULIB_WMEMPCPY]) |
| GNULIB_WMEMSET=0; AC_SUBST([GNULIB_WMEMSET]) |
| GNULIB_WCSLEN=0; AC_SUBST([GNULIB_WCSLEN]) |
| GNULIB_WCSNLEN=0; AC_SUBST([GNULIB_WCSNLEN]) |
| GNULIB_WCSCPY=0; AC_SUBST([GNULIB_WCSCPY]) |
| GNULIB_WCPCPY=0; AC_SUBST([GNULIB_WCPCPY]) |
| GNULIB_WCSNCPY=0; AC_SUBST([GNULIB_WCSNCPY]) |
| GNULIB_WCPNCPY=0; AC_SUBST([GNULIB_WCPNCPY]) |
| GNULIB_WCSCAT=0; AC_SUBST([GNULIB_WCSCAT]) |
| GNULIB_WCSNCAT=0; AC_SUBST([GNULIB_WCSNCAT]) |
| GNULIB_WCSCMP=0; AC_SUBST([GNULIB_WCSCMP]) |
| GNULIB_WCSNCMP=0; AC_SUBST([GNULIB_WCSNCMP]) |
| GNULIB_WCSCASECMP=0; AC_SUBST([GNULIB_WCSCASECMP]) |
| GNULIB_WCSNCASECMP=0; AC_SUBST([GNULIB_WCSNCASECMP]) |
| GNULIB_WCSCOLL=0; AC_SUBST([GNULIB_WCSCOLL]) |
| GNULIB_WCSXFRM=0; AC_SUBST([GNULIB_WCSXFRM]) |
| GNULIB_WCSDUP=0; AC_SUBST([GNULIB_WCSDUP]) |
| GNULIB_WCSCHR=0; AC_SUBST([GNULIB_WCSCHR]) |
| GNULIB_WCSRCHR=0; AC_SUBST([GNULIB_WCSRCHR]) |
| GNULIB_WCSCSPN=0; AC_SUBST([GNULIB_WCSCSPN]) |
| GNULIB_WCSSPN=0; AC_SUBST([GNULIB_WCSSPN]) |
| GNULIB_WCSPBRK=0; AC_SUBST([GNULIB_WCSPBRK]) |
| GNULIB_WCSSTR=0; AC_SUBST([GNULIB_WCSSTR]) |
| 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_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_WMEMCHR=1; AC_SUBST([HAVE_WMEMCHR]) |
| HAVE_WMEMCMP=1; AC_SUBST([HAVE_WMEMCMP]) |
| HAVE_WMEMCPY=1; AC_SUBST([HAVE_WMEMCPY]) |
| HAVE_WMEMMOVE=1; AC_SUBST([HAVE_WMEMMOVE]) |
| HAVE_WMEMPCPY=1; AC_SUBST([HAVE_WMEMPCPY]) |
| HAVE_WMEMSET=1; AC_SUBST([HAVE_WMEMSET]) |
| HAVE_WCSLEN=1; AC_SUBST([HAVE_WCSLEN]) |
| HAVE_WCSNLEN=1; AC_SUBST([HAVE_WCSNLEN]) |
| HAVE_WCSCPY=1; AC_SUBST([HAVE_WCSCPY]) |
| HAVE_WCPCPY=1; AC_SUBST([HAVE_WCPCPY]) |
| HAVE_WCSNCPY=1; AC_SUBST([HAVE_WCSNCPY]) |
| HAVE_WCPNCPY=1; AC_SUBST([HAVE_WCPNCPY]) |
| HAVE_WCSCAT=1; AC_SUBST([HAVE_WCSCAT]) |
| HAVE_WCSNCAT=1; AC_SUBST([HAVE_WCSNCAT]) |
| HAVE_WCSCMP=1; AC_SUBST([HAVE_WCSCMP]) |
| HAVE_WCSNCMP=1; AC_SUBST([HAVE_WCSNCMP]) |
| HAVE_WCSCASECMP=1; AC_SUBST([HAVE_WCSCASECMP]) |
| HAVE_WCSNCASECMP=1; AC_SUBST([HAVE_WCSNCASECMP]) |
| HAVE_WCSCOLL=1; AC_SUBST([HAVE_WCSCOLL]) |
| HAVE_WCSXFRM=1; AC_SUBST([HAVE_WCSXFRM]) |
| HAVE_WCSDUP=1; AC_SUBST([HAVE_WCSDUP]) |
| HAVE_WCSCHR=1; AC_SUBST([HAVE_WCSCHR]) |
| HAVE_WCSRCHR=1; AC_SUBST([HAVE_WCSRCHR]) |
| HAVE_WCSCSPN=1; AC_SUBST([HAVE_WCSCSPN]) |
| HAVE_WCSSPN=1; AC_SUBST([HAVE_WCSSPN]) |
| HAVE_WCSPBRK=1; AC_SUBST([HAVE_WCSPBRK]) |
| HAVE_WCSSTR=1; AC_SUBST([HAVE_WCSSTR]) |
| HAVE_WCSTOK=1; AC_SUBST([HAVE_WCSTOK]) |
| 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]) |
| 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]) |
| REPLACE_WCSWIDTH=0; AC_SUBST([REPLACE_WCSWIDTH]) |
| REPLACE_WCSFTIME=0; AC_SUBST([REPLACE_WCSFTIME]) |
| REPLACE_WCSTOK=0; AC_SUBST([REPLACE_WCSTOK]) |
| ]) |