dnl A placeholder for ISO C99 , 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 . dnl Check for (missing in Linux uClibc when built without wide dnl character support). dnl 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 ]], [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 ]]) if test $ac_cv_have_decl_wcsdup = no; then HAVE_DECL_WCSDUP=0 fi ]) dnl Check whether is usable at all. AC_DEFUN([gl_WCHAR_H_INLINE_OK], [ dnl Test whether suffers due to the transition from '__inline' to dnl 'gnu_inline'. See dnl and . In summary, dnl glibc version 2.5 or older, together with gcc version 4.3 or newer and dnl the option -std=c99 or -std=gnu99, leads to a broken . AC_REQUIRE([AC_CANONICAL_HOST]) AC_CACHE_CHECK([whether uses 'inline' correctly], [gl_cv_header_wchar_h_correct_inline], [gl_cv_header_wchar_h_correct_inline=yes case "$host_os" in *-gnu* | gnu*) AC_LANG_CONFTEST([ AC_LANG_SOURCE([[ #define wcstod renamed_wcstod #include 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 "$save_ac_compile" | sed s/conftest/conftest1/` if echo '#include "conftest.c"' >conftest1.c \ && AC_TRY_EVAL([ac_compile]); then AC_LANG_CONFTEST([ AC_LANG_SOURCE([[ #define wcstod renamed_wcstod #include int zero (void) { return 0; } ]])]) dnl See note above about renaming object files. ac_compile=`echo "$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 $gl_cv_header_wchar_h_correct_inline = no; then AC_MSG_ERROR([ cannot be used with this compiler ($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 , 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]) ])