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headers.m4
# This file is part of Autoconf. -*- Autoconf -*- # Checking for headers. # # Copyright (C) 1988, 1999-2004, 2006, 2008-2012 Free Software # Foundation, Inc. # This file is part of Autoconf. This program is free # software; you can redistribute it and/or modify it under the # terms of the GNU General Public License as published by the # Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # Under Section 7 of GPL version 3, you are granted additional # permissions described in the Autoconf Configure Script Exception, # version 3.0, as published by the Free Software Foundation. # # You should have received a copy of the GNU General Public License # and a copy of the Autoconf Configure Script Exception along with # this program; see the files COPYINGv3 and COPYING.EXCEPTION # respectively. If not, see <http://www.gnu.org/licenses/>. # Written by David MacKenzie, with help from # Franc,ois Pinard, Karl Berry, Richard Pixley, Ian Lance Taylor, # Roland McGrath, Noah Friedman, david d zuhn, and many others. # Table of contents # # 1. Generic tests for headers # 2. Default includes # 3. Headers to tests with AC_CHECK_HEADERS # 4. Tests for specific headers ## ------------------------------ ## ## 1. Generic tests for headers. ## ## ------------------------------ ## # AC_CHECK_HEADER(HEADER-FILE, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], # [INCLUDES]) # --------------------------------------------------------- # We are slowly moving to checking headers with the compiler instead # of the preproc, so that we actually learn about the usability of a # header instead of its mere presence. But since users are used to # the old semantics, they check for headers in random order and # without providing prerequisite headers. This macro implements the # transition phase, and should be cleaned up latter to use compilation # only. # # If INCLUDES is empty, then check both via the compiler and preproc. # If the results are different, issue a warning, but keep the preproc # result. # # If INCLUDES is `-', keep only the old semantics. # # If INCLUDES is specified and different from `-', then use the new # semantics only. # # The m4_indir allows for fewer expansions of $@. AC_DEFUN([AC_CHECK_HEADER], [m4_indir(m4_case([$4], [], [[_AC_CHECK_HEADER_MONGREL]], [-], [[_AC_CHECK_HEADER_PREPROC]], [[_AC_CHECK_HEADER_COMPILE]]), $@) ])# AC_CHECK_HEADER # _AC_CHECK_HEADER_MONGREL_BODY # ----------------------------- # Shell function body for _AC_CHECK_HEADER_MONGREL m4_define([_AC_CHECK_HEADER_MONGREL_BODY], [ AS_LINENO_PUSH([$[]1]) AS_VAR_SET_IF([$[]3], [AC_CACHE_CHECK([for $[]2], [$[]3], [])], [# Is the header compilable? AC_MSG_CHECKING([$[]2 usability]) AC_COMPILE_IFELSE([AC_LANG_SOURCE([$[]4 @%:@include <$[]2>])], [ac_header_compiler=yes], [ac_header_compiler=no]) AC_MSG_RESULT([$ac_header_compiler]) # Is the header present? AC_MSG_CHECKING([$[]2 presence]) AC_PREPROC_IFELSE([AC_LANG_SOURCE([@%:@include <$[]2>])], [ac_header_preproc=yes], [ac_header_preproc=no]) AC_MSG_RESULT([$ac_header_preproc]) # So? What about this header? case $ac_header_compiler:$ac_header_preproc:$ac_[]_AC_LANG_ABBREV[]_preproc_warn_flag in #(( yes:no: ) AC_MSG_WARN([$[]2: accepted by the compiler, rejected by the preprocessor!]) AC_MSG_WARN([$[]2: proceeding with the compiler's result]) ;; no:yes:* ) AC_MSG_WARN([$[]2: present but cannot be compiled]) AC_MSG_WARN([$[]2: check for missing prerequisite headers?]) AC_MSG_WARN([$[]2: see the Autoconf documentation]) AC_MSG_WARN([$[]2: section "Present But Cannot Be Compiled"]) AC_MSG_WARN([$[]2: proceeding with the compiler's result]) m4_ifset([AC_PACKAGE_BUGREPORT], [m4_n([( AS_BOX([Report this to ]AC_PACKAGE_BUGREPORT) ) | sed "s/^/$as_me: WARNING: /" >&2])])dnl ;; esac AC_CACHE_CHECK([for $[]2], [$[]3], [AS_VAR_SET([$[]3], [$ac_header_compiler])])]) AS_LINENO_POP ])#_AC_CHECK_HEADER_MONGREL_BODY # _AC_CHECK_HEADER_MONGREL(HEADER-FILE, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], # [INCLUDES = DEFAULT-INCLUDES]) # ------------------------------------------------------------------ # Check using both the compiler and the preprocessor. If they disagree, # warn, and the preproc wins. # # This is not based on _AC_CHECK_HEADER_COMPILE and _AC_CHECK_HEADER_PREPROC # because it obfuscate the code to try to factor everything, in particular # because of the cache variables, and the `checking ...' messages. AC_DEFUN([_AC_CHECK_HEADER_MONGREL], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_check_header_mongrel], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_check_header_mongrel], [LINENO HEADER VAR INCLUDES], [Tests whether HEADER exists, giving a warning if it cannot be compiled using the include files in INCLUDES and setting the cache variable VAR accordingly.])], [$0_BODY])]dnl [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])]dnl [ac_fn_[]_AC_LANG_ABBREV[]_check_header_mongrel ]dnl ["$LINENO" "$1" "ac_Header" "AS_ESCAPE([AC_INCLUDES_DEFAULT([$4])], [""])" AS_VAR_IF([ac_Header], [yes], [$2], [$3]) AS_VAR_POPDEF([ac_Header])])# _AC_CHECK_HEADER_MONGREL # _AC_CHECK_HEADER_COMPILE_BODY # ----------------------------- # Shell function body for _AC_CHECK_HEADER_COMPILE m4_define([_AC_CHECK_HEADER_COMPILE_BODY], [ AS_LINENO_PUSH([$[]1]) AC_CACHE_CHECK([for $[]2], [$[]3], [AC_COMPILE_IFELSE([AC_LANG_SOURCE([$[]4 @%:@include <$[]2>])], [AS_VAR_SET([$[]3], [yes])], [AS_VAR_SET([$[]3], [no])])]) AS_LINENO_POP ])# _AC_CHECK_HEADER_COMPILE_BODY # _AC_CHECK_HEADER_COMPILE(HEADER-FILE, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], # [INCLUDES = DEFAULT-INCLUDES]) # -------------------------------------------------------------- # Check the compiler accepts HEADER-FILE. The INCLUDES are defaulted. AC_DEFUN([_AC_CHECK_HEADER_COMPILE], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_check_header_compile], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_check_header_compile], [LINENO HEADER VAR INCLUDES], [Tests whether HEADER exists and can be compiled using the include files in INCLUDES, setting the cache variable VAR accordingly.])], [$0_BODY])]dnl [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])]dnl [ac_fn_[]_AC_LANG_ABBREV[]_check_header_compile ]dnl ["$LINENO" "$1" "ac_Header" "AS_ESCAPE([AC_INCLUDES_DEFAULT([$4])], [""])" AS_VAR_IF([ac_Header], [yes], [$2], [$3]) AS_VAR_POPDEF([ac_Header])])# _AC_CHECK_HEADER_COMPILE # _AC_CHECK_HEADER_PREPROC_BODY # ----------------------------- # Shell function body for _AC_CHECK_HEADER_PREPROC. m4_define([_AC_CHECK_HEADER_PREPROC_BODY], [ AS_LINENO_PUSH([$[]1]) AC_CACHE_CHECK([for $[]2], [$[]3], [AC_PREPROC_IFELSE([AC_LANG_SOURCE([@%:@include <$[]2>])], [AS_VAR_SET([$[]3], [yes])], [AS_VAR_SET([$[]3], [no])])]) AS_LINENO_POP ])# _AC_CHECK_HEADER_PREPROC_BODY # _AC_CHECK_HEADER_PREPROC(HEADER-FILE, # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) # -------------------------------------------------------------- # Check the preprocessor accepts HEADER-FILE. AC_DEFUN([_AC_CHECK_HEADER_PREPROC], [AC_REQUIRE_SHELL_FN([ac_fn_]_AC_LANG_ABBREV[_check_header_preproc], [AS_FUNCTION_DESCRIBE([ac_fn_]_AC_LANG_ABBREV[_check_header_preproc], [LINENO HEADER VAR], [Tests whether HEADER is present, setting the cache variable VAR accordingly.])], [$0_BODY])]dnl [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])]dnl [ac_fn_[]_AC_LANG_ABBREV[]_check_header_preproc "$LINENO" "$1" "ac_Header" AS_VAR_IF([ac_Header], [yes], [$2], [$3]) AS_VAR_POPDEF([ac_Header])dnl ])# _AC_CHECK_HEADER_PREPROC # _AC_CHECK_HEADER_OLD(HEADER-FILE, [ACTION-IF-FOUND], # [ACTION-IF-NOT-FOUND]) # _AC_CHECK_HEADER_NEW(HEADER-FILE, [ACTION-IF-FOUND], # [ACTION-IF-NOT-FOUND]) # ---------------------------------------------------- # Some packages used these undocumented macros. Even worse, gcc # redefined AC_CHECK_HEADER in terms of _AC_CHECK_HEADER_OLD, so we # can't do the simpler: # AU_DEFUN([_AC_CHECK_HEADER_OLD], # [AC_CHECK_HEADER([$1], [$2], [$3], [-])]) AC_DEFUN([_AC_CHECK_HEADER_OLD], [AC_DIAGNOSE([obsolete], [The macro `$0' is obsolete. You should use AC_CHECK_HEADER with a fourth argument.])]dnl [_AC_CHECK_HEADER_PREPROC($@)]) AC_DEFUN([_AC_CHECK_HEADER_NEW], [AC_DIAGNOSE([obsolete], [The macro `$0' is obsolete. You should use AC_CHECK_HEADER with a fourth argument.])]dnl [_AC_CHECK_HEADER_COMPILE($@)]) # _AH_CHECK_HEADER(HEADER-FILE) # ----------------------------- # Prepare the autoheader snippet for HEADER-FILE. m4_define([_AH_CHECK_HEADER], [AH_TEMPLATE(AS_TR_CPP([HAVE_$1]), [Define to 1 if you have the <$1> header file.])]) # AH_CHECK_HEADERS(HEADER-FILE...) # -------------------------------- m4_define([AH_CHECK_HEADERS], [m4_foreach_w([AC_Header], [$1], [_AH_CHECK_HEADER(m4_defn([AC_Header]))])]) # AC_CHECK_HEADERS(HEADER-FILE..., # [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], # [INCLUDES]) # ---------------------------------------------------------- # Check for each whitespace-separated HEADER-FILE (omitting the <> or # ""), and perform ACTION-IF-FOUND or ACTION-IF-NOT-FOUND for each # header. INCLUDES is as for AC_CHECK_HEADER. Additionally, make the # preprocessor definition HAVE_HEADER_FILE available for each found # header. Either ACTION may include `break' to stop the search. AC_DEFUN([AC_CHECK_HEADERS], [m4_map_args_w([$1], [_AH_CHECK_HEADER(], [)])]dnl [AS_FOR([AC_header], [ac_header], [$1], [AC_CHECK_HEADER(AC_header, [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_]AC_header)) $2], [$3], [$4])dnl]) ])# AC_CHECK_HEADERS # _AC_CHECK_HEADER_ONCE(HEADER-FILE) # ---------------------------------- # Check for a single HEADER-FILE once. m4_define([_AC_CHECK_HEADER_ONCE], [_AH_CHECK_HEADER([$1])AC_DEFUN([_AC_Header_]m4_translit([[$1]], [./-], [___]), [m4_divert_text([INIT_PREPARE], [AS_VAR_APPEND([ac_header_list], [" $1"])]) _AC_HEADERS_EXPANSION])AC_REQUIRE([_AC_Header_]m4_translit([[$1]], [./-], [___]))]) # AC_CHECK_HEADERS_ONCE(HEADER-FILE...) # ------------------------------------- # Add each whitespace-separated name in HEADER-FILE to the list of # headers to check once. AC_DEFUN([AC_CHECK_HEADERS_ONCE], [m4_map_args_w([$1], [_AC_CHECK_HEADER_ONCE(], [)])]) m4_define([_AC_HEADERS_EXPANSION], [ m4_divert_text([DEFAULTS], [ac_header_list=]) AC_CHECK_HEADERS([$ac_header_list], [], [], [AC_INCLUDES_DEFAULT]) m4_define([_AC_HEADERS_EXPANSION], []) ]) ## --------------------- ## ## 2. Default includes. ## ## --------------------- ## # Always use the same set of default headers for all the generic # macros. It is easier to document, to extend, and to understand than # having specific defaults for each macro. # _AC_INCLUDES_DEFAULT_REQUIREMENTS # --------------------------------- # Required when AC_INCLUDES_DEFAULT uses its default branch. AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS], [m4_divert_text([DEFAULTS], [# Factoring default headers for most tests. dnl If ever you change this variable, please keep autoconf.texi in sync. ac_includes_default="\ #include <stdio.h> #ifdef HAVE_SYS_TYPES_H # include <sys/types.h> #endif #ifdef HAVE_SYS_STAT_H # include <sys/stat.h> #endif #ifdef STDC_HEADERS # include <stdlib.h> # include <stddef.h> #else # ifdef HAVE_STDLIB_H # include <stdlib.h> # endif #endif #ifdef HAVE_STRING_H # if !defined STDC_HEADERS && defined HAVE_MEMORY_H # include <memory.h> # endif # include <string.h> #endif #ifdef HAVE_STRINGS_H # include <strings.h> #endif #ifdef HAVE_INTTYPES_H # include <inttypes.h> #endif #ifdef HAVE_STDINT_H # include <stdint.h> #endif #ifdef HAVE_UNISTD_H # include <unistd.h> #endif" ])dnl AC_REQUIRE([AC_HEADER_STDC])dnl # On IRIX 5.3, sys/types and inttypes.h are conflicting. AC_CHECK_HEADERS([sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \ inttypes.h stdint.h unistd.h], [], [], $ac_includes_default) ])# _AC_INCLUDES_DEFAULT_REQUIREMENTS # AC_INCLUDES_DEFAULT([INCLUDES]) # ------------------------------- # If INCLUDES is empty, expand in default includes, otherwise in # INCLUDES. # In most cases INCLUDES is not double quoted as it should, and if # for instance INCLUDES = `#include <stdio.h>' then unless we force # a newline, the hash will swallow the closing paren etc. etc. # The usual failure. # Take no risk: for the newline. AC_DEFUN([AC_INCLUDES_DEFAULT], [m4_ifval([$1], [$1 ], [AC_REQUIRE([_AC_INCLUDES_DEFAULT_REQUIREMENTS])dnl $ac_includes_default])]) ## ------------------------------------------- ## ## 3. Headers to check with AC_CHECK_HEADERS. ## ## ------------------------------------------- ## # errno.h is portable. AN_HEADER([OS.h], [AC_CHECK_HEADERS]) AN_HEADER([argz.h], [AC_CHECK_HEADERS]) AN_HEADER([arpa/inet.h], [AC_CHECK_HEADERS]) AN_HEADER([fcntl.h], [AC_CHECK_HEADERS]) AN_HEADER([fenv.h], [AC_CHECK_HEADERS]) AN_HEADER([float.h], [AC_CHECK_HEADERS]) AN_HEADER([fs_info.h], [AC_CHECK_HEADERS]) AN_HEADER([inttypes.h], [AC_CHECK_HEADERS]) AN_HEADER([langinfo.h], [AC_CHECK_HEADERS]) AN_HEADER([libintl.h], [AC_CHECK_HEADERS]) AN_HEADER([limits.h], [AC_CHECK_HEADERS]) AN_HEADER([locale.h], [AC_CHECK_HEADERS]) AN_HEADER([mach/mach.h], [AC_CHECK_HEADERS]) AN_HEADER([malloc.h], [AC_CHECK_HEADERS]) AN_HEADER([memory.h], [AC_CHECK_HEADERS]) AN_HEADER([mntent.h], [AC_CHECK_HEADERS]) AN_HEADER([mnttab.h], [AC_CHECK_HEADERS]) AN_HEADER([netdb.h], [AC_CHECK_HEADERS]) AN_HEADER([netinet/in.h], [AC_CHECK_HEADERS]) AN_HEADER([nl_types.h], [AC_CHECK_HEADERS]) AN_HEADER([nlist.h], [AC_CHECK_HEADERS]) AN_HEADER([paths.h], [AC_CHECK_HEADERS]) AN_HEADER([sgtty.h], [AC_CHECK_HEADERS]) AN_HEADER([shadow.h], [AC_CHECK_HEADERS]) AN_HEADER([stddef.h], [AC_CHECK_HEADERS]) AN_HEADER([stdint.h], [AC_CHECK_HEADERS]) AN_HEADER([stdio_ext.h], [AC_CHECK_HEADERS]) AN_HEADER([stdlib.h], [AC_CHECK_HEADERS]) AN_HEADER([string.h], [AC_CHECK_HEADERS]) AN_HEADER([strings.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/acl.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/file.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/filsys.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/fs/s5param.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/fs_types.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/fstyp.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/ioctl.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/mntent.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/mount.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/param.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/socket.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/statfs.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/statvfs.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/systeminfo.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/time.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/timeb.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/vfs.h], [AC_CHECK_HEADERS]) AN_HEADER([sys/window.h], [AC_CHECK_HEADERS]) AN_HEADER([syslog.h], [AC_CHECK_HEADERS]) AN_HEADER([termio.h], [AC_CHECK_HEADERS]) AN_HEADER([termios.h], [AC_CHECK_HEADERS]) AN_HEADER([unistd.h], [AC_CHECK_HEADERS]) AN_HEADER([utime.h], [AC_CHECK_HEADERS]) AN_HEADER([utmp.h], [AC_CHECK_HEADERS]) AN_HEADER([utmpx.h], [AC_CHECK_HEADERS]) AN_HEADER([values.h], [AC_CHECK_HEADERS]) AN_HEADER([wchar.h], [AC_CHECK_HEADERS]) AN_HEADER([wctype.h], [AC_CHECK_HEADERS]) ## ------------------------------- ## ## 4. Tests for specific headers. ## ## ------------------------------- ## # AC_HEADER_ASSERT # ---------------- # Check whether to enable assertions. AC_DEFUN_ONCE([AC_HEADER_ASSERT], [ AC_MSG_CHECKING([whether to enable assertions]) AC_ARG_ENABLE([assert], [AS_HELP_STRING([--disable-assert], [turn off assertions])], [ac_enable_assert=$enableval AS_IF(dnl [test "x$enableval" = xno], [AC_DEFINE([NDEBUG], [1], [Define to 1 if assertions should be disabled.])], [test "x$enableval" != xyes], [AC_MSG_WARN([invalid argument supplied to --enable-assert]) ac_enable_assert=yes])], [ac_enable_assert=yes]) AC_MSG_RESULT([$ac_enable_assert]) ]) # _AC_CHECK_HEADER_DIRENT(HEADER-FILE, # [ACTION-IF-FOUND], [ACTION-IF-NOT_FOUND]) # ----------------------------------------------------------------- # Like AC_CHECK_HEADER, except also make sure that HEADER-FILE # defines the type `DIR'. dirent.h on NextStep 3.2 doesn't. m4_define([_AC_CHECK_HEADER_DIRENT], [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_dirent_$1])dnl AC_CACHE_CHECK([for $1 that defines DIR], [ac_Header], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h> #include <$1> ], [if ((DIR *) 0) return 0;])], [AS_VAR_SET([ac_Header], [yes])], [AS_VAR_SET([ac_Header], [no])])]) AS_VAR_IF([ac_Header], [yes], [$2], [$3]) AS_VAR_POPDEF([ac_Header])dnl ])# _AC_CHECK_HEADER_DIRENT # _AH_CHECK_HEADER_DIRENT(HEADERS) # -------------------------------- # Like _AH_CHECK_HEADER, but tuned to a dirent provider. m4_define([_AH_CHECK_HEADER_DIRENT], [AH_TEMPLATE(AS_TR_CPP([HAVE_$1]), [Define to 1 if you have the <$1> header file, and it defines `DIR'.])]) # AC_HEADER_DIRENT # ---------------- AC_DEFUN([AC_HEADER_DIRENT], [m4_map_args([_AH_CHECK_HEADER_DIRENT], [dirent.h], [sys/ndir.h], [sys/dir.h], [ndir.h])]dnl [ac_header_dirent=no for ac_hdr in dirent.h sys/ndir.h sys/dir.h ndir.h; do _AC_CHECK_HEADER_DIRENT($ac_hdr, [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$ac_hdr), 1) ac_header_dirent=$ac_hdr; break]) done # Two versions of opendir et al. are in -ldir and -lx on SCO Xenix. if test $ac_header_dirent = dirent.h; then AC_SEARCH_LIBS(opendir, dir) else AC_SEARCH_LIBS(opendir, x) fi ])# AC_HEADER_DIRENT # AC_HEADER_MAJOR # --------------- AN_FUNCTION([major], [AC_HEADER_MAJOR]) AN_FUNCTION([makedev], [AC_HEADER_MAJOR]) AN_FUNCTION([minor], [AC_HEADER_MAJOR]) AN_HEADER([sys/mkdev.h], [AC_HEADER_MAJOR]) AC_DEFUN([AC_HEADER_MAJOR], [AC_CACHE_CHECK(whether sys/types.h defines makedev, ac_cv_header_sys_types_h_makedev, [AC_LINK_IFELSE([AC_LANG_PROGRAM([[@%:@include <sys/types.h>]], [[return makedev(0, 0);]])], [ac_cv_header_sys_types_h_makedev=yes], [ac_cv_header_sys_types_h_makedev=no]) ]) if test $ac_cv_header_sys_types_h_makedev = no; then AC_CHECK_HEADER(sys/mkdev.h, [AC_DEFINE(MAJOR_IN_MKDEV, 1, [Define to 1 if `major', `minor', and `makedev' are declared in <mkdev.h>.])]) if test $ac_cv_header_sys_mkdev_h = no; then AC_CHECK_HEADER(sys/sysmacros.h, [AC_DEFINE(MAJOR_IN_SYSMACROS, 1, [Define to 1 if `major', `minor', and `makedev' are declared in <sysmacros.h>.])]) fi fi ])# AC_HEADER_MAJOR # AC_HEADER_RESOLV # ---------------- # According to http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?resolver+3 # (or http://www.chemie.fu-berlin.de/cgi-bin/man/sgi_irix?resolver+3), # sys/types.h, netinet/in.h and arpa/nameser.h are required on IRIX. # netinet/in.h is needed on Cygwin, too. # With Solaris 9, netdb.h is required, to get symbols like HOST_NOT_FOUND. # AN_HEADER(resolv.h, [AC_HEADER_RESOLV]) AC_DEFUN([AC_HEADER_RESOLV], [AC_CHECK_HEADERS(sys/types.h netinet/in.h arpa/nameser.h netdb.h resolv.h, [], [], [[#ifdef HAVE_SYS_TYPES_H # include <sys/types.h> #endif #ifdef HAVE_NETINET_IN_H # include <netinet/in.h> /* inet_ functions / structs */ #endif #ifdef HAVE_ARPA_NAMESER_H # include <arpa/nameser.h> /* DNS HEADER struct */ #endif #ifdef HAVE_NETDB_H # include <netdb.h> #endif]]) ])# AC_HEADER_RESOLV # AC_HEADER_STAT # -------------- # FIXME: Shouldn't this be named AC_HEADER_SYS_STAT? AC_DEFUN([AC_HEADER_STAT], [AC_CACHE_CHECK(whether stat file-mode macros are broken, ac_cv_header_stat_broken, [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/types.h> #include <sys/stat.h> #if defined S_ISBLK && defined S_IFDIR extern char c1[S_ISBLK (S_IFDIR) ? -1 : 1]; #endif #if defined S_ISBLK && defined S_IFCHR extern char c2[S_ISBLK (S_IFCHR) ? -1 : 1]; #endif #if defined S_ISLNK && defined S_IFREG extern char c3[S_ISLNK (S_IFREG) ? -1 : 1]; #endif #if defined S_ISSOCK && defined S_IFREG extern char c4[S_ISSOCK (S_IFREG) ? -1 : 1]; #endif ]])], ac_cv_header_stat_broken=no, ac_cv_header_stat_broken=yes)]) if test $ac_cv_header_stat_broken = yes; then AC_DEFINE(STAT_MACROS_BROKEN, 1, [Define to 1 if the `S_IS*' macros in <sys/stat.h> do not work properly.]) fi ])# AC_HEADER_STAT # AC_CHECK_HEADER_STDBOOL # ----------------- # Check for stdbool.h that conforms to C99. AN_IDENTIFIER([bool], [AC_CHECK_HEADER_STDBOOL]) AN_IDENTIFIER([true], [AC_CHECK_HEADER_STDBOOL]) AN_IDENTIFIER([false],[AC_CHECK_HEADER_STDBOOL]) AC_DEFUN([AC_CHECK_HEADER_STDBOOL], [AC_CACHE_CHECK([for stdbool.h that conforms to C99], [ac_cv_header_stdbool_h], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[ #include <stdbool.h> #ifndef bool "error: bool is not defined" #endif #ifndef false "error: false is not defined" #endif #if false "error: false is not 0" #endif #ifndef true "error: true is not defined" #endif #if true != 1 "error: true is not 1" #endif #ifndef __bool_true_false_are_defined "error: __bool_true_false_are_defined is not defined" #endif struct s { _Bool s: 1; _Bool t; } s; char a[true == 1 ? 1 : -1]; char b[false == 0 ? 1 : -1]; char c[__bool_true_false_are_defined == 1 ? 1 : -1]; char d[(bool) 0.5 == true ? 1 : -1]; /* See body of main program for 'e'. */ char f[(_Bool) 0.0 == false ? 1 : -1]; char g[true]; char h[sizeof (_Bool)]; char i[sizeof s.t]; enum { j = false, k = true, l = false * true, m = true * 256 }; /* The following fails for HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */ _Bool n[m]; char o[sizeof n == m * sizeof n[0] ? 1 : -1]; char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; /* Catch a bug in an HP-UX C compiler. See http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html */ _Bool q = true; _Bool *pq = &q; ]], [[ bool e = &s; *pq |= q; *pq |= ! q; /* Refer to every declared value, to avoid compiler optimizations. */ return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l + !m + !n + !o + !p + !q + !pq); ]])], [ac_cv_header_stdbool_h=yes], [ac_cv_header_stdbool_h=no])]) AC_CHECK_TYPES([_Bool]) ])# AC_CHECK_HEADER_STDBOOL # AC_HEADER_STDBOOL # ----------------- # Define HAVE_STDBOOL_H if tdbool.h that conforms to C99. AC_DEFUN([AC_HEADER_STDBOOL], [AC_CHECK_HEADER_STDBOOL if test $ac_cv_header_stdbool_h = yes; then AC_DEFINE(HAVE_STDBOOL_H, 1, [Define to 1 if stdbool.h conforms to C99.]) fi ])# AC_HEADER_STDBOOL # AC_HEADER_STDC # -------------- AC_DEFUN([AC_HEADER_STDC], [AC_CACHE_CHECK(for ANSI C header files, ac_cv_header_stdc, [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h> #include <stdarg.h> #include <string.h> #include <float.h> ]])], [ac_cv_header_stdc=yes], [ac_cv_header_stdc=no]) if test $ac_cv_header_stdc = yes; then # SunOS 4.x string.h does not declare mem*, contrary to ANSI. AC_EGREP_HEADER(memchr, string.h, , ac_cv_header_stdc=no) fi if test $ac_cv_header_stdc = yes; then # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI. AC_EGREP_HEADER(free, stdlib.h, , ac_cv_header_stdc=no) fi if test $ac_cv_header_stdc = yes; then # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi. AC_RUN_IFELSE([AC_LANG_SOURCE( [[#include <ctype.h> #include <stdlib.h> #if ((' ' & 0x0FF) == 0x020) # define ISLOWER(c) ('a' <= (c) && (c) <= 'z') # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c)) #else # define ISLOWER(c) \ (('a' <= (c) && (c) <= 'i') \ || ('j' <= (c) && (c) <= 'r') \ || ('s' <= (c) && (c) <= 'z')) # define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c)) #endif #define XOR(e, f) (((e) && !(f)) || (!(e) && (f))) int main () { int i; for (i = 0; i < 256; i++) if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) return 2; return 0; }]])], , ac_cv_header_stdc=no, :) fi]) if test $ac_cv_header_stdc = yes; then AC_DEFINE(STDC_HEADERS, 1, [Define to 1 if you have the ANSI C header files.]) fi ])# AC_HEADER_STDC # AC_HEADER_SYS_WAIT # ------------------ AC_DEFUN([AC_HEADER_SYS_WAIT], [AC_CACHE_CHECK([for sys/wait.h that is POSIX.1 compatible], ac_cv_header_sys_wait_h, [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([#include <sys/types.h> #include <sys/wait.h> #ifndef WEXITSTATUS # define WEXITSTATUS(stat_val) ((unsigned int) (stat_val) >> 8) #endif #ifndef WIFEXITED # define WIFEXITED(stat_val) (((stat_val) & 255) == 0) #endif ], [ int s; wait (&s); s = WIFEXITED (s) ? WEXITSTATUS (s) : 1;])], [ac_cv_header_sys_wait_h=yes], [ac_cv_header_sys_wait_h=no])]) if test $ac_cv_header_sys_wait_h = yes; then AC_DEFINE(HAVE_SYS_WAIT_H, 1, [Define to 1 if you have <sys/wait.h> that is POSIX.1 compatible.]) fi ])# AC_HEADER_SYS_WAIT # AC_HEADER_TIME # -------------- AC_DEFUN([AC_HEADER_TIME], [AC_CACHE_CHECK([whether time.h and sys/time.h may both be included], ac_cv_header_time, [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/types.h> #include <sys/time.h> #include <time.h> ], [if ((struct tm *) 0) return 0;])], [ac_cv_header_time=yes], [ac_cv_header_time=no])]) if test $ac_cv_header_time = yes; then AC_DEFINE(TIME_WITH_SYS_TIME, 1, [Define to 1 if you can safely include both <sys/time.h> and <time.h>.]) fi ])# AC_HEADER_TIME # _AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H # ---------------------------------- m4_define([_AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H], [AC_CACHE_CHECK([whether termios.h defines TIOCGWINSZ], ac_cv_sys_tiocgwinsz_in_termios_h, [AC_EGREP_CPP([yes], [#include <sys/types.h> #include <termios.h> #ifdef TIOCGWINSZ yes #endif ], ac_cv_sys_tiocgwinsz_in_termios_h=yes, ac_cv_sys_tiocgwinsz_in_termios_h=no)]) ])# _AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H # _AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL # ---------------------------------- m4_define([_AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL], [AC_CACHE_CHECK([whether sys/ioctl.h defines TIOCGWINSZ], ac_cv_sys_tiocgwinsz_in_sys_ioctl_h, [AC_EGREP_CPP([yes], [#include <sys/types.h> #include <sys/ioctl.h> #ifdef TIOCGWINSZ yes #endif ], ac_cv_sys_tiocgwinsz_in_sys_ioctl_h=yes, ac_cv_sys_tiocgwinsz_in_sys_ioctl_h=no)]) ])# _AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL # AC_HEADER_TIOCGWINSZ # -------------------- # Look for a header that defines TIOCGWINSZ. # FIXME: Is this the proper name? Is this the proper implementation? # I need more help. AC_DEFUN([AC_HEADER_TIOCGWINSZ], [_AC_HEADER_TIOCGWINSZ_IN_TERMIOS_H if test $ac_cv_sys_tiocgwinsz_in_termios_h != yes; then _AC_HEADER_TIOCGWINSZ_IN_SYS_IOCTL if test $ac_cv_sys_tiocgwinsz_in_sys_ioctl_h = yes; then AC_DEFINE(GWINSZ_IN_SYS_IOCTL,1, [Define to 1 if `TIOCGWINSZ' requires <sys/ioctl.h>.]) fi fi ])# AC_HEADER_TIOCGWINSZ # AU::AC_UNISTD_H # --------------- AU_DEFUN([AC_UNISTD_H], [AC_CHECK_HEADERS(unistd.h)]) # AU::AC_USG # ---------- # Define `USG' if string functions are in strings.h. AU_DEFUN([AC_USG], [AC_MSG_CHECKING([for BSD string and memory functions]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[@%:@include <strings.h>]], [[rindex(0, 0); bzero(0, 0);]])], [AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no) AC_DEFINE(USG, 1, [Define to 1 if you do not have <strings.h>, index, bzero, etc... This symbol is obsolete, you should not depend upon it.])]) AC_CHECK_HEADERS(string.h)], [Remove `AC_MSG_CHECKING', `AC_LINK_IFELSE' and this warning when you adjust your code to use HAVE_STRING_H.]) # AU::AC_MEMORY_H # --------------- # To be precise this macro used to be: # # | AC_MSG_CHECKING(whether string.h declares mem functions) # | AC_EGREP_HEADER(memchr, string.h, ac_found=yes, ac_found=no) # | AC_MSG_RESULT($ac_found) # | if test $ac_found = no; then # | AC_CHECK_HEADER(memory.h, [AC_DEFINE(NEED_MEMORY_H)]) # | fi # # But it is better to check for both headers, and alias NEED_MEMORY_H to # HAVE_MEMORY_H. AU_DEFUN([AC_MEMORY_H], [AC_CHECK_HEADER(memory.h, [AC_DEFINE([NEED_MEMORY_H], 1, [Same as `HAVE_MEMORY_H', don't depend on me.])]) AC_CHECK_HEADERS(string.h memory.h)], [Remove this warning and `AC_CHECK_HEADER(memory.h, AC_DEFINE(...))' when you adjust your code to use HAVE_STRING_H and HAVE_MEMORY_H, not NEED_MEMORY_H.]) # AU::AC_DIR_HEADER # ----------------- # Like calling `AC_HEADER_DIRENT' and `AC_FUNC_CLOSEDIR_VOID', but # defines a different set of C preprocessor macros to indicate which # header file is found. AU_DEFUN([AC_DIR_HEADER], [AC_HEADER_DIRENT AC_FUNC_CLOSEDIR_VOID test ac_cv_header_dirent_dirent_h && AC_DEFINE([DIRENT], 1, [Same as `HAVE_DIRENT_H', don't depend on me.]) test ac_cv_header_dirent_sys_ndir_h && AC_DEFINE([SYSNDIR], 1, [Same as `HAVE_SYS_NDIR_H', don't depend on me.]) test ac_cv_header_dirent_sys_dir_h && AC_DEFINE([SYSDIR], 1, [Same as `HAVE_SYS_DIR_H', don't depend on me.]) test ac_cv_header_dirent_ndir_h && AC_DEFINE([NDIR], 1, [Same as `HAVE_NDIR_H', don't depend on me.])], [Remove this warning and the four `AC_DEFINE' when you adjust your code to use `AC_HEADER_DIRENT'.])
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