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inetutils
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inetutils-1_6
acinclude.m4
597 строк
21 KB
Debarshi Ray
2008-04-15 Ludovic Courtès <ludo@gnu.org> (tiny change)
15 апр 2008, 00:13
15 апр 2008, 00:13
f278981
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dnl Autoconf macros used by inetutils dnl dnl Copyright (C) 1996, 1997, 1998, 2002, 2004, 2005, 2007 Free Software Foundation, Inc. dnl dnl Mostly written by Miles Bader <miles@gnu.ai.mit.edu> dnl dnl Joel N. Weber II <devnull@gnu.org> wrote dnl IU_ENABLE_CLIENT, IU_ENABLE_SERVER and IU_ENABLE_FOO. dnl dnl This program is free software; you can redistribute it and/or modify dnl it under the terms of the GNU General Public License as published by dnl the Free Software Foundation; either version 3, or (at your option) dnl any later version. dnl dnl This program is distributed in the hope that it will be useful, dnl but WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the dnl GNU General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program; if not, write to the Free Software dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. dnl dnl IU_FLUSHLEFT -- remove all whitespace at the beginning of lines dnl This is useful for c-code which may include cpp statements dnl define([IU_FLUSHLEFT], [changequote(`,')dnl patsubst(`$1', `^[ ]+') changequote([,])])dnl dnl IU_RESULT_ACTIONS -- generate shell code for the result of a test dnl $1 -- CVAR -- cache variable to check dnl $2 -- NAME -- if not empty, used to generate a default value TRUE: dnl `AC_DEFINE(HAVE_NAME)' dnl $2 -- TRUE -- what to do if the CVAR is `yes' dnl $3 -- FALSE -- what to do otherwise; defaults to `:' dnl AC_DEFUN([IU_RESULT_ACTIONS], [ [if test "$$1" = yes; then ]ifelse([$3], , [AC_DEFINE(HAVE_]translit($2, [a-z ./<>], [A-Z___])[, 1, [FIXME])], [$3])[ else ]ifelse([$4], , [:], [$4])[ fi]])dnl dnl IU_CHECK_DEFINE -- Check for cpp defines dnl $1 - NAME -- printed in message dnl $2 - INCLS -- C program text to inculde necessary files for testing dnl $3 - MACROS -- a space-separated list of macros that all must be defined dnl defaults to NAME dnl $4 - TRUE -- what to do if all macros are defined; defaults to dnl AC_DEFINE(upcase(HAVE_$1)) dnl $5 - FALSE -- what to do if some macros aren't defined dnl AC_DEFUN([IU_CHECK_MACRO], [ define([IU_CVAR], [inetutils_cv_macro_]translit($1, [A-Z ./<>], [a-z___]))dnl define([IU_TAG], [IU_CHECK_MACRO_]translit($1, [a-z ./<>], [A-Z___]))dnl AC_CACHE_CHECK([for $1], IU_CVAR, AC_EGREP_CPP(IU_TAG, IU_FLUSHLEFT( [$2 #if ]dnl changequote(<<,>>)dnl patsubst(patsubst(ifelse(<<$3>>, , <<$1>>, <<$3>>), <<\>[ ,]+\<>>, << && >>), <<\w+>>, <<defined(\&)>>) dnl changequote([,])dnl [ ]IU_TAG[ #endif]), IU_CVAR[=yes], IU_CVAR[=no])) dnl IU_RESULT_ACTIONS(IU_CVAR, [$1], [$4], [$5]) dnl undefine([IU_CVAR]) undefine([IU_TAG])])dnl dnl dnl Following are some more specific tests dnl dnl IU_CHECK_WEAK_REFS -- See if any of a variety of `weak reference' dnl mechanisms works. If so, this defines HAVE_WEAK_REFS, and one of dnl HAVE_ATTR_WEAK_REFS, HAVE_PRAGMA_WEAK_REFS, or HAVE_ASM_WEAK_REFS to dnl indicate which sort. dnl dnl This can't just be a compile-check, as gcc somtimes accepts the syntax even dnl feature isn't actually supported. dnl AC_DEFUN([IU_CHECK_WEAK_REFS], [ AH_TEMPLATE(HAVE_WEAK_REFS, 1, [Define if you have weak references]) AC_CACHE_CHECK(whether gcc weak references work, inetutils_cv_attr_weak_refs, AC_TRY_LINK([], [extern char *not_defined (char *, char *) __attribute__ ((weak)); if (not_defined) puts ("yes"); ], [inetutils_cv_attr_weak_refs=yes], [inetutils_cv_attr_weak_refs=no])) if test "$inetutils_cv_weak_refs" = yes; then AC_DEFINE(HAVE_WEAK_REFS) AC_DEFINE(HAVE_ATTR_WEAK_REFS, 1, [Define if you have weak "attribute" references]) else AC_CACHE_CHECK(whether pragma weak references work, inetutils_cv_pragma_weak_refs, AC_TRY_LINK([], [extern char *not_defined (char *, char *); #pragma weak not_defined if (not_defined) puts ("yes"); ], [inetutils_cv_pragma_weak_refs=yes], [inetutils_cv_pragma_weak_refs=no])) if test "$inetutils_cv_pragma_weak_refs" = yes; then AC_DEFINE(HAVE_WEAK_REFS) AC_DEFINE(HAVE_PRAGMA_WEAK_REFS, 1, [Define if you have weak "pragma" references]) else AC_CACHE_CHECK(whether asm weak references work, inetutils_cv_asm_weak_refs, AC_TRY_LINK([], [extern char *not_defined (char *, char *); asm (".weak not_defined"); if (not_defined) puts ("yes"); ], [inetutils_cv_asm_weak_refs=yes], [inetutils_cv_asm_weak_refs=no])) if test "$inetutils_cv_asm_weak_refs" = yes; then AC_DEFINE(HAVE_WEAK_REFS) AC_DEFINE(HAVE_ASM_WEAK_REFS, 1, [Define if you have weak "assembler" references]) fi fi fi])dnl dnl IU_LIB_NCURSES -- check for, and configure, ncurses dnl dnl If libncurses is found to exist on this system and the --disable-ncurses dnl flag wasn't specified, defines LIBNCURSES with the appropriate linker dnl specification, and possibly defines NCURSES_INCLUDE with the appropriate dnl -I flag to get access to ncurses include files. dnl AC_DEFUN([IU_LIB_NCURSES], [ AC_ARG_ENABLE([ncurses], AC_HELP_STRING([--disable-ncurses], [don't prefer -lncurses over -lcurses]), , [enable_ncurses=yes]) if test "$enable_ncurses" = yes; then AC_CHECK_LIB(ncurses, initscr, LIBNCURSES="-lncurses") if test "$LIBNCURSES"; then # Use ncurses header files instead of the ordinary ones, if possible; # is there a better way of doing this, that avoids looking in specific # directories? AC_ARG_WITH([ncurses-include-dir], AC_HELP_STRING([--with-ncurses-include-dir=DIR], [Set directory containing the include files for use with -lncurses, when it isn't installed as the default curses library. If DIR is "none", then no special ncurses include files are used.])) if test "${with_ncurses_include_dir+set}" = set; then AC_MSG_CHECKING(for ncurses include dir) case "$with_ncurses_include_dir" in no|none) inetutils_cv_includedir_ncurses=none;; *) inetutils_cv_includedir_ncurses="$with_ncurses_include_dir";; esac AC_MSG_RESULT($inetutils_cv_includedir_ncurses) else AC_CACHE_CHECK(for ncurses include dir, inetutils_cv_includedir_ncurses, for D in $includedir $prefix/include /local/include /usr/local/include /include /usr/include; do if test -d $D/ncurses; then inetutils_cv_includedir_ncurses="$D/ncurses" break fi test "$inetutils_cv_includedir_ncurses" \ || inetutils_cv_includedir_ncurses=none done) fi if test "$inetutils_cv_includedir_ncurses" = none; then NCURSES_INCLUDE="" LIBNCURSES='' else NCURSES_INCLUDE="-I$inetutils_cv_includedir_ncurses" fi fi fi AC_SUBST(NCURSES_INCLUDE) AC_SUBST(LIBNCURSES)])dnl dnl IU_LIB_TERMCAP -- check for various termcap libraries dnl dnl Checks for various common libraries implementing the termcap interface, dnl including ncurses (unless --disable ncurses is specified), curses (which dnl does on some systems), termcap, and termlib. If termcap is found, then dnl LIBTERMCAP is defined with the appropriate linker specification. dnl AC_DEFUN([IU_LIB_TERMCAP], [ AC_REQUIRE([IU_LIB_NCURSES]) if test "$LIBNCURSES"; then LIBTERMCAP="$LIBNCURSES" else AC_CHECK_LIB(curses, tgetent, LIBTERMCAP=-lcurses) if test "$ac_cv_lib_curses_tgetent" = no; then AC_CHECK_LIB(termcap, tgetent, LIBTERMCAP=-ltermcap) fi if test "$ac_cv_lib_termcap_tgetent" = no; then AC_CHECK_LIB(termlib, tgetent, LIBTERMCAP=-ltermlib) fi fi AC_SUBST(LIBTERMCAP)])dnl dnl IU_LIB_CURSES -- checke for curses, and associated libraries dnl dnl Checks for varions libraries implementing the curses interface, and if dnl found, defines LIBCURSES to be the appropriate linker specification, dnl *including* any termcap libraries if needed (some versions of curses dnl don't need termcap). dnl AC_DEFUN([IU_LIB_CURSES], [ AC_REQUIRE([IU_LIB_TERMCAP]) AC_REQUIRE([IU_LIB_NCURSES]) if test "$LIBNCURSES"; then LIBCURSES="$LIBNCURSES" # ncurses doesn't require termcap else _IU_SAVE_LIBS="$LIBS" LIBS="$LIBTERMCAP" AC_CHECK_LIB(curses, initscr, LIBCURSES="-lcurses") if test "$LIBCURSES" -a "$LIBTERMCAP" -a "$LIBCURSES" != "$LIBTERMCAP"; then AC_CACHE_CHECK(whether curses needs $LIBTERMCAP, inetutils_cv_curses_needs_termcap, LIBS="$LIBCURSES" AC_TRY_LINK([#include <curses.h>], [initscr ();], [inetutils_cv_curses_needs_termcap=no], [inetutils_cv_curses_needs_termcap=yes])) if test $inetutils_cv_curses_needs_termcap = yes; then LIBCURSES="$LIBCURSES $LIBTERMCAP" fi fi LIBS="$_IU_SAVE_LIBS" fi AC_SUBST(LIBCURSES)])dnl dnl IU_CONFIG_PATHS -- Configure system paths for use by programs dnl $1 - PATHS -- The file to read containing the paths dnl $2 - MAKEDEFS -- The file to generate containing make `PATHDEF_' vars dnl $3 - HDRDEFS -- The file to generate containing c header stuff dnl dnl From the paths listed in the file PATHS, generate a file of make input dnl (MAKEDEFS) containing a make variable for each PATH_FOO, called dnl PATHDEF_FOO, which is set to a cpp option to define that path, unless it dnl is to be defined using a system define, in which case the dnl corresponding make variable is empty. A file called HDRDEFS will also be dnl generated containing cpp statements. For each PATH_FOO which is found dnl to be available as a system define, a statement will be generated which dnl defines it to be that system define, unless it is already defined (which dnl will be case if overridden by make). dnl AC_DEFUN([IU_CONFIG_PATHS], [ dnl We need to know if we're cross compiling. AC_REQUIRE([AC_PROG_CC]) AC_CHECK_HEADER(paths.h, AC_DEFINE(HAVE_PATHS_H, 1, [Define if you have the <paths.h> header file]) iu_paths_h="<paths.h>") dnl A slightly bogus use of AC_ARG_WITH; we never actually use dnl $with_PATHVAR, we just want to get this entry put into the help list. dnl We actually look for `with_' variables corresponding to each path dnl configured. AC_ARG_WITH([PATHVAR], AC_HELP_STRING([--with-PATHVAR=PATH], [Set the value of PATHVAR to PATH PATHVAR is the name of a \`PATH_FOO' variable, downcased, with \`_' changed to \`-'])) # For case-conversion with sed IU_UCASE=ABCDEFGHIJKLMNOPQRSTUVWXYZ iu_lcase=abcdefghijklmnopqrstuvwxyz tmpdir="$TMPDIR" test x"$tmpdir" = x && tmpdir="/tmp" iu_cache_file="$tmpdir/,iu-path-cache.$$" iu_tmp_file="$tmpdir/,iu-tmp.$$" ac_clean_files="$ac_clean_files $iu_cache_file $iu_tmp_file" while read iu_path iu_search; do test "$iu_path" = "#" -o -z "$iu_path" && continue iu_pathvar="`echo $iu_path | sed y/${IU_UCASE}/${iu_lcase}/`" AC_MSG_CHECKING(for value of $iu_path) iu_val='' iu_hdr='' iu_sym='' iu_cached='' iu_defaulted='' iu_cross_conflict='' if test "`eval echo '$'{with_$iu_pathvar+set}`" = set; then # User-supplied value eval iu_val=\"'$'with_$iu_pathvar\" elif test "`eval echo '$'{inetutils_cv_$iu_pathvar+set}`" = set; then # Cached value eval iu_val=\"'$'inetutils_cv_$iu_pathvar\" # invert escaped $(...) notation used in autoconf cache eval iu_val=\"\`echo \'"$iu_val"\' \| sed \''s/@(/$\(/g'\'\`\" iu_cached="(cached) " elif test "`eval echo '$'{inetutils_cv_hdr_$iu_pathvar+set}`" = set; then # Cached non-value eval iu_hdr=\"'$'inetutils_cv_hdr_$iu_pathvar\" eval iu_sym=\"'$'inetutils_cv_hdr_sym_$iu_pathvar\" iu_cached="(cached) " else # search for a reasonable value iu_test_type=r # `exists' iu_default='' iu_prev_cross_test='' for iu_try in $iu_paths_h $iu_search; do iu_cross_test='' case "$iu_try" in "<"*">"*) # <HEADER.h> and <HEADER.h>:SYMBOL -- look for SYMBOL in <HEADER.h> # SYMBOL defaults to _$iu_path (e.g., _PATH_FOO) changequote(,) dnl Avoid problems with [ ] in regexps eval iu_hdr=\'`echo "$iu_try" |sed 's/:.*$//'`\' eval iu_sym=\'`echo "$iu_try" |sed -n 's/^<[^>]*>:\(.*\)$/\1/p'`\' changequote([,]) test "$iu_sym" || iu_sym="_$iu_path" AC_EGREP_CPP(HAVE_$iu_sym, [#include ]$iu_hdr[ #ifdef $iu_sym HAVE_$iu_sym #endif], :, iu_hdr='' iu_sym='') ;; search:*) # Do a path search. The syntax here is: search:NAME[:PATH]... # Path searches always generate potential conflicts test "$cross_compiling" = yes && { iu_cross_conflict=yes; continue; } changequote(,) dnl Avoid problems with [ ] in regexps iu_name="`echo $iu_try | sed 's/^search:\([^:]*\).*$/\1/'`" iu_spath="`echo $iu_try | sed 's/^search:\([^:]*\)//'`" changequote([,]) test "$iu_spath" || iu_spath="$PATH" for iu_dir in `echo "$iu_spath" | sed 'y/:/ /'`; do test -z "$iu_dir" && iu_dir=. if test -$iu_test_type "$iu_dir/$iu_name"; then iu_val="$iu_dir/$iu_name" break fi done ;; no) iu_default=no;; x|d|f|c|b) iu_test_type=$iu_try;; *) # Just try the given name, with make-var substitution. Besides # yielding a value if found, this also sets the default. case "$iu_try" in "\""*"\"") # strip off quotes iu_try="`echo $iu_try | sed -e 's/^.//' -e 's/.$//'`" esac test -z "$iu_default" && iu_default="$iu_try" test "$cross_compiling" = yes && { iu_cross_test=yes; continue; } # See if the value begins with a $(FOO)/${FOO} make variable # corresponding to a shell variable, and if so set try_exp to the # value thereof. Recurse. iu_try_exp="$iu_try" changequote(,) iu_try_var="`echo "$iu_try_exp" |sed -n 's;^\$[({]\([-_a-zA-Z]*\)[)}].*;\1;p'`" while eval test \"$iu_try_var\" && eval test '${'$iu_try_var'+set}'; do # yes, and there's a corresponding shell variable, which substitute if eval test \"'$'"$iu_try_var"\" = NONE; then # Not filled in by configure yet case "$iu_try_var" in prefix | exec_prefix) iu_try_exp="$ac_default_prefix`echo "$iu_try_exp" |sed 's;^\$[({][-_a-zA-Z]*[)}];;'`";; esac iu_try_var='' # Stop expansion here else # Use the actual value of the shell variable eval iu_try_exp=\"`echo "$iu_try_exp" |sed 's;^\$[({]\([-_a-zA-Z]*\)[)}];\$\1;'`\" iu_try_var="`echo "$iu_try_exp" |sed -n 's;^\$[({]\([-_a-zA-Z]*\)[)}].*;\1;p'`" fi done changequote([,]) test -$iu_test_type "$iu_try_exp" && iu_val="$iu_try" ;; esac test "$iu_val" -o "$iu_hdr" && break test "$iu_cross_test" -a "$iu_prev_cross_test" && iu_cross_conflict=yes iu_prev_cross_test=$iu_cross_test done if test -z "$iu_val" -a -z "$iu_hdr"; then if test -z "$iu_default"; then iu_val=no else iu_val="$iu_default" iu_defaulted="(default) " fi fi fi if test "$iu_val"; then AC_MSG_RESULT(${iu_cached}${iu_defaulted}$iu_val) test "$iu_cross_conflict" -a "$iu_defaulted" \ && AC_MSG_WARN(may be incorrect because of cross-compilation) # Put the value in the autoconf cache. We replace $( with @( to avoid # variable evaluation problems when autoconf reads the cache later. echo inetutils_cv_$iu_pathvar=\'"`echo "$iu_val" | sed 's/\$(/@(/g'`"\' elif test "$iu_hdr"; then AC_MSG_RESULT(${iu_cached}from $iu_sym in $iu_hdr) echo inetutils_cv_hdr_$iu_pathvar=\'"$iu_hdr"\' echo inetutils_cv_hdr_sym_$iu_pathvar=\'"$iu_sym"\' fi done <[$1] >$iu_cache_file # Read the cache values constructed by the previous loop, . $iu_cache_file # Construct the pathdefs file -- a file of make variable definitions, of # the form PATHDEF_FOO, that contain cc -D switches to define the cpp macro # PATH_FOO. grep -v '^inetutils_cv_hdr_' < $iu_cache_file | \ while read iu_cache_set; do iu_var="`echo $iu_cache_set | sed 's/=.*$//'`" eval iu_val=\"'$'"$iu_var"\" # invert escaped $(...) notation used in autoconf cache eval iu_val=\"\`echo \'"$iu_val"\' \| sed \''s/@(/$\(/g'\'\`\" if test "$iu_val" != no; then iu_path="`echo $iu_var | sed -e 's/^inetutils_cv_//' -e y/${iu_lcase}/${IU_UCASE}/`" iu_pathdef="`echo $iu_path | sed 's/^PATH_/PATHDEF_/'`" echo $iu_pathdef = -D$iu_path='\"'"$iu_val"'\"' AC_DEFINE_UNQUOTED($iu_path, "$iu_val") fi done >$[$2] AC_SUBST_FILE([$2]) # Generate a file of #ifdefs that defaults PATH_FOO macros to _PATH_FOO (or # some other symbol) (excluding any who's value is set to `no'). grep '^inetutils_cv_hdr_sym_' < $iu_cache_file | \ while read iu_cache_set; do iu_sym_var="`echo "$iu_cache_set" | sed 's/=.*$//'`" eval iu_sym=\"'$'"$iu_sym_var"\" iu_path="`echo $iu_sym_var | sed -e 's/^inetutils_cv_hdr_sym_//' -e y/${iu_lcase}/${IU_UCASE}/`" cat <<EOF #ifndef $iu_path #define $iu_path $iu_sym #endif EOF done >$[$3] AC_SUBST_FILE([$3])]) AC_DEFUN([IU_ENABLE_FOO], [AC_ARG_ENABLE($1, AS_HELP_STRING([--disable-$1], [don't compile $1]), , [enable_]$1[=$enable_]$2) [if test "$enable_$1" = yes; then $1_BUILD=$1 $1_INSTALL_HOOK="install-$1-hook" else $1_BUILD='' $1_INSTALL_HOOK='' fi;] AC_SUBST([$1_BUILD]) AC_SUBST([$1_INSTALL_HOOK]) ]) AC_DEFUN([IU_ENABLE_CLIENT], [IU_ENABLE_FOO($1, clients)]) AC_DEFUN([IU_ENABLE_SERVER], [IU_ENABLE_FOO($1, servers)]) dnl IU_CHECK_KRB5(VERSION,PREFIX) dnl Search for a Kerberos implementation in the standard locations plus PREFIX, dnl if it is set and not "yes". dnl VERSION should be either 4 or 5 dnl Defines KRB5_CFLAGS and KRB5_LIBS if found. dnl Defines KRB_IMPL to "Heimdal", "MIT", or "OldMIT", or "none" if not found AC_DEFUN([IU_CHECK_KRB5], [ if test "x$iu_cv_lib_krb5_libs" = x; then cache="" ## Make sure we have res_query AC_CHECK_LIB(resolv, res_query) KRB5_PREFIX=[$2] KRB5_IMPL="none" # First try krb5-config if test "$KRB5_PREFIX" != "yes"; then krb5_path="$KRB5_PREFIX/bin" else krb5_path="$PATH" fi AC_PATH_PROG(KRB5CFGPATH, krb5-config, none, $krb5_path) if test "$KRB5CFGPATH" != "none"; then KRB5_CFLAGS="$CPPFLAGS `$KRB5CFGPATH --cflags krb$1`" KRB5_LIBS="$LDFLAGS `$KRB5CFGPATH --libs krb$1`" KRB5_IMPL="Heimdal" else ## OK, try the old code saved_CPPFLAGS="$CPPFLAGS" saved_LDFLAGS="$LDFLAGS" saved_LIBS="$LIBS" if test "$KRB5_PREFIX" != "yes"; then KRB5_CFLAGS="-I$KRB5_PREFIX/include" KRB5_LDFLAGS="-L$KRB5_PREFIX/lib" CPPFLAGS="$CPPFLAGS $KRB5_CFLAGS" LDFLAGS="$LDFLAGS $KRB5_LDFLAGS" fi KRB4_LIBS="-lkrb4 -ldes425" ## Check for new MIT kerberos V support AC_CHECK_LIB(krb5, krb5_init_context, [KRB5_IMPL="MIT" KRB5_LIBS="$KRB5_LDFLAGS $KRB4_LIBS -lkrb5 -lk5crypto -lcom_err"] ,, -lk5crypto -lcom_err) ## Heimdal kerberos V support if test "$KRB5_IMPL" = "none"; then AC_CHECK_LIB(krb5, krb5_init_context, [KRB5_IMPL="Heimdal" KRB5_LIBS="$KRB5_LDFLAGS $KRB4_LIBS -lkrb5 -ldes -lasn1 -lroken -lcrypt -lcom_err"] ,, -ldes -lasn1 -lroken -lcrypt -lcom_err) fi ## Old MIT Kerberos V ## Note: older krb5 distributions use -lcrypto instead of ## -lk5crypto. This may conflict with OpenSSL. if test "$KRB5_IMPL" = "none"; then AC_CHECK_LIB(krb5, krb5_init_context, [KRB5_IMPL="OldMIT", KRB5_LIBS="$KRB5_LDFLAGS $KRB4_LIBS -lkrb5 -lkrb5 -lcrypto -lcom_err"] ,, -lcrypto -lcom_err) fi LDFLAGS="$saved_LDFLAGS" LIBS="$saved_LIBS" fi iu_cv_lib_krb5_cflags="$KRB5_CFLAGS" iu_cv_lib_krb5_libs="$KRB5_LIBS" iu_cv_lib_krb5_impl="$KRB5_IMPL" else cached=" (cached) " KRB5_CFLAGS="$iu_cv_lib_krb5_cflags" KRB5_LIBS="$iu_cv_lib_krb5_libs" KRB5_IMPL="$iu_cv_lib_krb5_impl" fi AC_MSG_CHECKING(krb5 implementation) AC_MSG_RESULT(${cached}$KRB5_IMPL) ]) dnl IU_CHECK_MEMBER(AGGREGATE.MEMBER, dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], dnl [INCLUDES]) dnl AGGREGATE.MEMBER is for instance `struct passwd.pw_gecos'. dnl The member itself can be of an aggregate type dnl Shell variables are not a valid argument. AC_DEFUN([IU_CHECK_MEMBER], [AS_LITERAL_IF([$1], [], [AC_FATAL([$0: requires literal arguments])])dnl m4_bmatch([$1], [\.], , [m4_fatal([$0: Did not see any dot in `$1'])])dnl AS_VAR_PUSHDEF([ac_Member], [ac_cv_member_$1])dnl dnl Extract the aggregate name, and the member name AC_CACHE_CHECK([for $1], ac_Member, [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT([$4])], [dnl AGGREGATE ac_aggr; static m4_bpatsubst([$1], [\..*]) ac_aggr; dnl ac_aggr.MEMBER; if (sizeof(ac_aggr.m4_bpatsubst([$1], [^[^.]*\.]))) return 0;])], [AS_VAR_SET(ac_Member, yes)], [AS_VAR_SET(ac_Member, no)])]) AS_IF([test AS_VAR_GET(ac_Member) = yes], [$2], [$3])dnl AS_VAR_POPDEF([ac_Member])dnl ])dnl IU_CHECK_MEMBER dnl IU_CHECK_MEMBERS([AGGREGATE.MEMBER, ...], dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND] dnl [INCLUDES]) AC_DEFUN([IU_CHECK_MEMBERS], [m4_foreach([AC_Member], [$1], [IU_CHECK_MEMBER(AC_Member, [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_[]AC_Member), 1, [Define to 1 if `]m4_bpatsubst(AC_Member, [^[^.]*\.])[' is member of `]m4_bpatsubst(AC_Member, [\..*])['.]) $2], [$3], [$4])])])