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-rw-r--r--m4/wchar_h.m4257
1 files changed, 257 insertions, 0 deletions
diff --git a/m4/wchar_h.m4 b/m4/wchar_h.m4
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+dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
+
+dnl Copyright (C) 2007-2022 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 55
+
+AC_DEFUN_ONCE([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
+])
+
+# gl_WCHAR_MODULE_INDICATOR([modulename])
+# sets the shell variable that indicates the presence of the given module
+# to a C preprocessor expression that will evaluate to 1.
+# This macro invocation must not occur in macros that are AC_REQUIREd.
+AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
+[
+ dnl Ensure to expand the default settings once only.
+ gl_WCHAR_H_REQUIRE_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])
+])
+
+# Initializes the default values for AC_SUBSTed shell variables.
+# This macro must not be AC_REQUIREd. It must only be invoked, and only
+# outside of macros or in macros that are not AC_REQUIREd.
+AC_DEFUN([gl_WCHAR_H_REQUIRE_DEFAULTS],
+[
+ m4_defun(GL_MODULE_INDICATOR_PREFIX[_WCHAR_H_MODULE_INDICATOR_DEFAULTS], [
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_BTOWC])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTOB])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSINIT])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBRTOWC])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBRLEN])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSRTOWCS])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MBSNRTOWCS])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCRTOMB])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSRTOMBS])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNRTOMBS])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCWIDTH])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMCHR])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMCMP])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMCPY])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMMOVE])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMPCPY])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WMEMSET])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSLEN])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNLEN])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCPY])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCPCPY])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCPY])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCPNCPY])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCAT])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCAT])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCMP])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCMP])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCASECMP])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSNCASECMP])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCOLL])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSXFRM])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSDUP])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCHR])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSRCHR])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSCSPN])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSSPN])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSPBRK])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSSTR])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSTOK])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSWIDTH])
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCSFTIME])
+ dnl Support Microsoft deprecated alias function names by default.
+ gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_MDA_WCSDUP], [1])
+ ])
+ m4_require(GL_MODULE_INDICATOR_PREFIX[_WCHAR_H_MODULE_INDICATOR_DEFAULTS])
+ dnl Make sure the shell variable for GNULIB_FREE_POSIX is initialized.
+ gl_STDLIB_H_REQUIRE_DEFAULTS
+ AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+])
+
+AC_DEFUN([gl_WCHAR_H_DEFAULTS],
+[
+ 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])
+])