diff options
Diffstat (limited to 'm4')
-rw-r--r-- | m4/builtin-expect.m4 | 49 | ||||
-rw-r--r-- | m4/eealloc.m4 | 31 | ||||
-rw-r--r-- | m4/glibc21.m4 | 34 | ||||
-rw-r--r-- | m4/gnulib-comp.m4 | 30 | ||||
-rw-r--r-- | m4/mbstate_t.m4 | 41 | ||||
-rw-r--r-- | m4/regex.m4 | 300 |
6 files changed, 485 insertions, 0 deletions
diff --git a/m4/builtin-expect.m4 b/m4/builtin-expect.m4 new file mode 100644 index 00000000000..a1eaf965b45 --- /dev/null +++ b/m4/builtin-expect.m4 @@ -0,0 +1,49 @@ +dnl Check for __builtin_expect. + +dnl Copyright 2016-2018 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 Paul Eggert. + +AC_DEFUN([gl___BUILTIN_EXPECT], +[ + AC_CACHE_CHECK([for __builtin_expect], + [gl_cv___builtin_expect], + [AC_LINK_IFELSE( + [AC_LANG_SOURCE([[ + int + main (int argc, char **argv) + { + argc = __builtin_expect (argc, 100); + return argv[argc != 100][0]; + }]])], + [gl_cv___builtin_expect=yes], + [AC_LINK_IFELSE( + [AC_LANG_SOURCE([[ + #include <builtins.h> + int + main (int argc, char **argv) + { + argc = __builtin_expect (argc, 100); + return argv[argc != 100][0]; + }]])], + [gl_cv___builtin_expect="in <builtins.h>"], + [gl_cv___builtin_expect=no])])]) + if test "$gl_cv___builtin_expect" = yes; then + AC_DEFINE([HAVE___BUILTIN_EXPECT], [1]) + elif test "$gl_cv___builtin_expect" = "in <builtins.h>"; then + AC_DEFINE([HAVE___BUILTIN_EXPECT], [2]) + fi + AH_VERBATIM([HAVE___BUILTIN_EXPECT], + [/* Define to 1 if the compiler supports __builtin_expect, + and to 2 if <builtins.h> does. */ +#undef HAVE___BUILTIN_EXPECT +#ifndef HAVE___BUILTIN_EXPECT +# define __builtin_expect(e, c) (e) +#elif HAVE___BUILTIN_EXPECT == 2 +# include <builtins.h> +#endif + ]) +]) diff --git a/m4/eealloc.m4 b/m4/eealloc.m4 new file mode 100644 index 00000000000..a5a4e267d8e --- /dev/null +++ b/m4/eealloc.m4 @@ -0,0 +1,31 @@ +# eealloc.m4 serial 3 +dnl Copyright (C) 2003, 2009-2018 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. + +AC_DEFUN([gl_EEALLOC], +[ + AC_REQUIRE([gl_EEMALLOC]) + AC_REQUIRE([gl_EEREALLOC]) +]) + +AC_DEFUN([gl_EEMALLOC], +[ + _AC_FUNC_MALLOC_IF( + [gl_cv_func_malloc_0_nonnull=1], + [gl_cv_func_malloc_0_nonnull=0]) + AC_DEFINE_UNQUOTED([MALLOC_0_IS_NONNULL], [$gl_cv_func_malloc_0_nonnull], + [If malloc(0) is != NULL, define this to 1. Otherwise define this + to 0.]) +]) + +AC_DEFUN([gl_EEREALLOC], +[ + _AC_FUNC_REALLOC_IF( + [gl_cv_func_realloc_0_nonnull=1], + [gl_cv_func_realloc_0_nonnull=0]) + AC_DEFINE_UNQUOTED([REALLOC_0_IS_NONNULL], [$gl_cv_func_realloc_0_nonnull], + [If realloc(NULL,0) is != NULL, define this to 1. Otherwise define this + to 0.]) +]) diff --git a/m4/glibc21.m4 b/m4/glibc21.m4 new file mode 100644 index 00000000000..126aa1a959e --- /dev/null +++ b/m4/glibc21.m4 @@ -0,0 +1,34 @@ +# glibc21.m4 serial 5 +dnl Copyright (C) 2000-2002, 2004, 2008, 2010-2018 Free Software Foundation, +dnl 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. + +# Test for the GNU C Library, version 2.1 or newer, or uClibc. +# From Bruno Haible. + +AC_DEFUN([gl_GLIBC21], + [ + AC_CACHE_CHECK([whether we are using the GNU C Library >= 2.1 or uClibc], + [ac_cv_gnu_library_2_1], + [AC_EGREP_CPP([Lucky], + [ +#include <features.h> +#ifdef __GNU_LIBRARY__ + #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2) + Lucky GNU user + #endif +#endif +#ifdef __UCLIBC__ + Lucky user +#endif + ], + [ac_cv_gnu_library_2_1=yes], + [ac_cv_gnu_library_2_1=no]) + ] + ) + AC_SUBST([GLIBC21]) + GLIBC21="$ac_cv_gnu_library_2_1" + ] +) diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4 index 494c77c7c4e..61aabaa3427 100644 --- a/m4/gnulib-comp.m4 +++ b/m4/gnulib-comp.m4 @@ -48,6 +48,7 @@ AC_DEFUN([gl_EARLY], # Code from module allocator: # Code from module at-internal: # Code from module binary-io: + # Code from module builtin-expect: # Code from module byteswap: # Code from module c-ctype: # Code from module c-strcase: @@ -129,6 +130,7 @@ AC_DEFUN([gl_EARLY], # Code from module qcopy-acl: # Code from module readlink: # Code from module readlinkat: + # Code from module regex: # Code from module root-uid: # Code from module sig2str: # Code from module signal-h: @@ -358,6 +360,11 @@ AC_DEFUN([gl_INIT], AC_LIBOBJ([readlinkat]) fi gl_UNISTD_MODULE_INDICATOR([readlinkat]) + gl_REGEX + if test $ac_use_included_regex = yes; then + AC_LIBOBJ([regex]) + gl_PREREQ_REGEX + fi gl_FUNC_SIG2STR if test $ac_cv_func_sig2str = no; then AC_LIBOBJ([sig2str]) @@ -425,6 +432,7 @@ AC_DEFUN([gl_INIT], gl_UTIMENS AC_C_VARARRAYS gl_gnulib_enabled_260941c0e5dc67ec9e87d1fb321c300b=false + gl_gnulib_enabled_37f71b604aa9c54446783d80f42fe547=false gl_gnulib_enabled_cloexec=false gl_gnulib_enabled_dirfd=false gl_gnulib_enabled_dosname=false @@ -448,6 +456,13 @@ AC_DEFUN([gl_INIT], func_gl_gnulib_m4code_open fi } + func_gl_gnulib_m4code_37f71b604aa9c54446783d80f42fe547 () + { + if ! $gl_gnulib_enabled_37f71b604aa9c54446783d80f42fe547; then + gl___BUILTIN_EXPECT + gl_gnulib_enabled_37f71b604aa9c54446783d80f42fe547=true + fi + } func_gl_gnulib_m4code_cloexec () { if ! $gl_gnulib_enabled_cloexec; then @@ -651,6 +666,9 @@ AC_DEFUN([gl_INIT], if test $HAVE_READLINKAT = 0; then func_gl_gnulib_m4code_03e0aaad4cb89ca757653bd367a6ccb7 fi + if test $ac_use_included_regex = yes; then + func_gl_gnulib_m4code_37f71b604aa9c54446783d80f42fe547 + fi if { test $HAVE_DECL_STRTOIMAX = 0 || test $REPLACE_STRTOIMAX = 1; } && test $ac_cv_type_long_long_int = yes; then func_gl_gnulib_m4code_strtoll fi @@ -659,6 +677,7 @@ AC_DEFUN([gl_INIT], fi m4_pattern_allow([^gl_GNULIB_ENABLED_]) AM_CONDITIONAL([gl_GNULIB_ENABLED_260941c0e5dc67ec9e87d1fb321c300b], [$gl_gnulib_enabled_260941c0e5dc67ec9e87d1fb321c300b]) + AM_CONDITIONAL([gl_GNULIB_ENABLED_37f71b604aa9c54446783d80f42fe547], [$gl_gnulib_enabled_37f71b604aa9c54446783d80f42fe547]) AM_CONDITIONAL([gl_GNULIB_ENABLED_cloexec], [$gl_gnulib_enabled_cloexec]) AM_CONDITIONAL([gl_GNULIB_ENABLED_dirfd], [$gl_gnulib_enabled_dirfd]) AM_CONDITIONAL([gl_GNULIB_ENABLED_dosname], [$gl_gnulib_enabled_dosname]) @@ -924,6 +943,12 @@ AC_DEFUN([gl_FILE_LIST], [ lib/qcopy-acl.c lib/readlink.c lib/readlinkat.c + lib/regcomp.c + lib/regex.c + lib/regex.h + lib/regex_internal.c + lib/regex_internal.h + lib/regexec.c lib/root-uid.h lib/set-permissions.c lib/sha1.c @@ -980,6 +1005,7 @@ AC_DEFUN([gl_FILE_LIST], [ m4/absolute-header.m4 m4/acl.m4 m4/alloca.m4 + m4/builtin-expect.m4 m4/byteswap.m4 m4/c-strtod.m4 m4/clock_time.m4 @@ -991,6 +1017,7 @@ AC_DEFUN([gl_FILE_LIST], [ m4/dirent_h.m4 m4/dirfd.m4 m4/dup2.m4 + m4/eealloc.m4 m4/environ.m4 m4/errno_h.m4 m4/euidaccess.m4 @@ -1018,6 +1045,7 @@ AC_DEFUN([gl_FILE_LIST], [ m4/gettime.m4 m4/gettimeofday.m4 m4/gl-openssl.m4 + m4/glibc21.m4 m4/gnulib-common.m4 m4/group-member.m4 m4/ieee754-h.m4 @@ -1030,6 +1058,7 @@ AC_DEFUN([gl_FILE_LIST], [ m4/lstat.m4 m4/manywarnings-c++.m4 m4/manywarnings.m4 + m4/mbstate_t.m4 m4/md5.m4 m4/memrchr.m4 m4/minmax.m4 @@ -1048,6 +1077,7 @@ AC_DEFUN([gl_FILE_LIST], [ m4/putenv.m4 m4/readlink.m4 m4/readlinkat.m4 + m4/regex.m4 m4/sha1.m4 m4/sha256.m4 m4/sha512.m4 diff --git a/m4/mbstate_t.m4 b/m4/mbstate_t.m4 new file mode 100644 index 00000000000..004aa0d17c8 --- /dev/null +++ b/m4/mbstate_t.m4 @@ -0,0 +1,41 @@ +# mbstate_t.m4 serial 13 +dnl Copyright (C) 2000-2002, 2008-2018 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. + +# From Paul Eggert. + +# BeOS 5 has <wchar.h> but does not define mbstate_t, +# so you can't declare an object of that type. +# Check for this incompatibility with Standard C. + +# AC_TYPE_MBSTATE_T +# ----------------- +AC_DEFUN([AC_TYPE_MBSTATE_T], +[ + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11 + + AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [AC_INCLUDES_DEFAULT[ +/* 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 + included before <wchar.h>. */ +#include <stddef.h> +#include <stdio.h> +#include <time.h> +#include <wchar.h>]], + [[mbstate_t x; return sizeof x;]])], + [ac_cv_type_mbstate_t=yes], + [ac_cv_type_mbstate_t=no])]) + if test $ac_cv_type_mbstate_t = yes; then + AC_DEFINE([HAVE_MBSTATE_T], [1], + [Define to 1 if <wchar.h> declares mbstate_t.]) + else + AC_DEFINE([mbstate_t], [int], + [Define to a type if <wchar.h> does not define.]) + fi +]) diff --git a/m4/regex.m4 b/m4/regex.m4 new file mode 100644 index 00000000000..055d71b5aaa --- /dev/null +++ b/m4/regex.m4 @@ -0,0 +1,300 @@ +# serial 67 + +# Copyright (C) 1996-2001, 2003-2018 Free Software Foundation, Inc. +# +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +dnl Initially derived from code in GNU grep. +dnl Mostly written by Jim Meyering. + +AC_PREREQ([2.50]) + +AC_DEFUN([gl_REGEX], +[ + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_ARG_WITH([included-regex], + [AS_HELP_STRING([--without-included-regex], + [don't compile regex; this is the default on systems + with recent-enough versions of the GNU C Library + (use with caution on other systems).])]) + + case $with_included_regex in #( + yes|no) ac_use_included_regex=$with_included_regex + ;; + '') + # If the system regex support is good enough that it passes the + # following run test, then default to *not* using the included regex.c. + # If cross compiling, assume the test would fail and use the included + # regex.c. + AC_CHECK_DECLS_ONCE([alarm]) + AC_CHECK_HEADERS_ONCE([malloc.h]) + AC_CACHE_CHECK([for working re_compile_pattern], + [gl_cv_func_re_compile_pattern_working], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include <regex.h> + + #include <locale.h> + #include <limits.h> + #include <string.h> + + #if defined M_CHECK_ACTION || HAVE_DECL_ALARM + # include <signal.h> + # include <unistd.h> + #endif + + #if HAVE_MALLOC_H + # include <malloc.h> + #endif + + #ifdef M_CHECK_ACTION + /* Exit with distinguishable exit code. */ + static void sigabrt_no_core (int sig) { raise (SIGTERM); } + #endif + ]], + [[int result = 0; + static struct re_pattern_buffer regex; + unsigned char folded_chars[UCHAR_MAX + 1]; + int i; + const char *s; + struct re_registers regs; + + /* Some builds of glibc go into an infinite loop on this + test. Use alarm to force death, and mallopt to avoid + malloc recursion in diagnosing the corrupted heap. */ +#if HAVE_DECL_ALARM + signal (SIGALRM, SIG_DFL); + alarm (2); +#endif +#ifdef M_CHECK_ACTION + signal (SIGABRT, sigabrt_no_core); + mallopt (M_CHECK_ACTION, 2); +#endif + + if (setlocale (LC_ALL, "en_US.UTF-8")) + { + { + /* https://sourceware.org/ml/libc-hacker/2006-09/msg00008.html + This test needs valgrind to catch the bug on Debian + GNU/Linux 3.1 x86, but it might catch the bug better + on other platforms and it shouldn't hurt to try the + test here. */ + static char const pat[] = "insert into"; + static char const data[] = + "\xFF\0\x12\xA2\xAA\xC4\xB1,K\x12\xC4\xB1*\xACK"; + re_set_syntax (RE_SYNTAX_GREP | RE_HAT_LISTS_NOT_NEWLINE + | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + result |= 1; + else if (re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, ®s) + != -1) + result |= 1; + regfree (®ex); + } + + { + /* This test is from glibc bug 15078. + The test case is from Andreas Schwab in + <https://sourceware.org/ml/libc-alpha/2013-01/msg00967.html>. + */ + static char const pat[] = "[^x]x"; + static char const data[] = + /* <U1000><U103B><U103D><U1014><U103A><U102F><U1015><U103A> */ + "\xe1\x80\x80" + "\xe1\x80\xbb" + "\xe1\x80\xbd" + "\xe1\x80\x94" + "\xe1\x80\xba" + "\xe1\x80\xaf" + "\xe1\x80\x95" + "\xe1\x80\xba" + "x"; + re_set_syntax (0); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern (pat, sizeof pat - 1, ®ex); + if (s) + result |= 1; + else + { + i = re_search (®ex, data, sizeof data - 1, + 0, sizeof data - 1, 0); + if (i != 0 && i != 21) + result |= 1; + } + regfree (®ex); + } + + if (! setlocale (LC_ALL, "C")) + return 1; + } + + /* This test is from glibc bug 3957, reported by Andrew Mackey. */ + re_set_syntax (RE_SYNTAX_EGREP | RE_HAT_LISTS_NOT_NEWLINE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("a[^x]b", 6, ®ex); + if (s) + result |= 2; + /* This should fail, but succeeds for glibc-2.5. */ + else if (re_search (®ex, "a\nb", 3, 0, 3, ®s) != -1) + result |= 2; + + /* This regular expression is from Spencer ere test number 75 + in grep-2.3. */ + re_set_syntax (RE_SYNTAX_POSIX_EGREP); + memset (®ex, 0, sizeof regex); + for (i = 0; i <= UCHAR_MAX; i++) + folded_chars[i] = i; + regex.translate = folded_chars; + s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex); + /* This should fail with _Invalid character class name_ error. */ + if (!s) + result |= 4; + + /* Ensure that [b-a] is diagnosed as invalid, when + using RE_NO_EMPTY_RANGES. */ + re_set_syntax (RE_SYNTAX_POSIX_EGREP | RE_NO_EMPTY_RANGES); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("a[b-a]", 6, ®ex); + if (s == 0) + result |= 8; + + /* This should succeed, but does not for glibc-2.1.3. */ + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("{1", 2, ®ex); + if (s) + result |= 8; + + /* The following example is derived from a problem report + against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */ + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("[an\371]*n", 7, ®ex); + if (s) + result |= 8; + /* This should match, but does not for glibc-2.2.1. */ + else if (re_match (®ex, "an", 2, 0, ®s) != 2) + result |= 8; + + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("x", 1, ®ex); + if (s) + result |= 8; + /* glibc-2.2.93 does not work with a negative RANGE argument. */ + else if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1) + result |= 8; + + /* The version of regex.c in older versions of gnulib + ignored RE_ICASE. Detect that problem too. */ + re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("x", 1, ®ex); + if (s) + result |= 16; + else if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0) + result |= 16; + + /* Catch a bug reported by Vin Shelton in + https://lists.gnu.org/r/bug-coreutils/2007-06/msg00089.html + */ + re_set_syntax (RE_SYNTAX_POSIX_BASIC + & ~RE_CONTEXT_INVALID_DUP + & ~RE_NO_EMPTY_RANGES); + memset (®ex, 0, sizeof regex); + s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex); + if (s) + result |= 32; + + /* REG_STARTEND was added to glibc on 2004-01-15. + Reject older versions. */ + if (! REG_STARTEND) + result |= 64; + +#if 0 + /* It would be nice to reject hosts whose regoff_t values are too + narrow (including glibc on hosts with 64-bit ptrdiff_t and + 32-bit int), but we should wait until glibc implements this + feature. Otherwise, support for equivalence classes and + multibyte collation symbols would always be broken except + when compiling --without-included-regex. */ + if (sizeof (regoff_t) < sizeof (ptrdiff_t) + || sizeof (regoff_t) < sizeof (ssize_t)) + result |= 64; +#endif + + return result; + ]])], + [gl_cv_func_re_compile_pattern_working=yes], + [gl_cv_func_re_compile_pattern_working=no], + [case "$host_os" in + # Guess no on native Windows. + mingw*) gl_cv_func_re_compile_pattern_working="guessing no" ;; + # Otherwise, assume it is not working. + *) gl_cv_func_re_compile_pattern_working="guessing no" ;; + esac + ]) + ]) + case "$gl_cv_func_re_compile_pattern_working" in #( + *yes) ac_use_included_regex=no;; #( + *no) ac_use_included_regex=yes;; + esac + ;; + *) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex]) + ;; + esac + + if test $ac_use_included_regex = yes; then + AC_DEFINE([_REGEX_INCLUDE_LIMITS_H], [1], + [Define if you want <regex.h> to include <limits.h>, so that it + consistently overrides <limits.h>'s RE_DUP_MAX.]) + AC_DEFINE([_REGEX_LARGE_OFFSETS], [1], + [Define if you want regoff_t to be at least as wide POSIX requires.]) + AC_DEFINE([re_syntax_options], [rpl_re_syntax_options], + [Define to rpl_re_syntax_options if the replacement should be used.]) + AC_DEFINE([re_set_syntax], [rpl_re_set_syntax], + [Define to rpl_re_set_syntax if the replacement should be used.]) + AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern], + [Define to rpl_re_compile_pattern if the replacement should be used.]) + AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap], + [Define to rpl_re_compile_fastmap if the replacement should be used.]) + AC_DEFINE([re_search], [rpl_re_search], + [Define to rpl_re_search if the replacement should be used.]) + AC_DEFINE([re_search_2], [rpl_re_search_2], + [Define to rpl_re_search_2 if the replacement should be used.]) + AC_DEFINE([re_match], [rpl_re_match], + [Define to rpl_re_match if the replacement should be used.]) + AC_DEFINE([re_match_2], [rpl_re_match_2], + [Define to rpl_re_match_2 if the replacement should be used.]) + AC_DEFINE([re_set_registers], [rpl_re_set_registers], + [Define to rpl_re_set_registers if the replacement should be used.]) + AC_DEFINE([re_comp], [rpl_re_comp], + [Define to rpl_re_comp if the replacement should be used.]) + AC_DEFINE([re_exec], [rpl_re_exec], + [Define to rpl_re_exec if the replacement should be used.]) + AC_DEFINE([regcomp], [rpl_regcomp], + [Define to rpl_regcomp if the replacement should be used.]) + AC_DEFINE([regexec], [rpl_regexec], + [Define to rpl_regexec if the replacement should be used.]) + AC_DEFINE([regerror], [rpl_regerror], + [Define to rpl_regerror if the replacement should be used.]) + AC_DEFINE([regfree], [rpl_regfree], + [Define to rpl_regfree if the replacement should be used.]) + fi +]) + +# Prerequisites of lib/regex.c and lib/regex_internal.c. +AC_DEFUN([gl_PREREQ_REGEX], +[ + AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + AC_REQUIRE([AC_C_INLINE]) + AC_REQUIRE([AC_C_RESTRICT]) + AC_REQUIRE([AC_TYPE_MBSTATE_T]) + AC_REQUIRE([gl_EEMALLOC]) + AC_REQUIRE([gl_GLIBC21]) + AC_CHECK_HEADERS([libintl.h]) + AC_CHECK_FUNCS_ONCE([isblank iswctype]) + AC_CHECK_DECLS([isblank], [], [], [[#include <ctype.h>]]) +]) |