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authorSergey Poznyakoff <gray@gnu.org.ua>2013-09-11 20:15:16 (GMT)
committer Sergey Poznyakoff <gray@gnu.org.ua>2013-09-13 07:13:24 (GMT)
commit2cbce6f40d92d42218dd5c4c38dd9badb244dc79 (patch) (side-by-side diff)
treed19ab8c29077911dbe4817669405c19bf206078e /acinclude.m4
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Initial commit
Diffstat (limited to 'acinclude.m4') (more/less context) (ignore whitespace changes)
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diff --git a/acinclude.m4 b/acinclude.m4
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+# Copyright (C) 2001, 2006, 2008-2012 Sergey Poznyakoff
+#
+# 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, 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.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+
+AC_DEFUN([GR_ENABLE],[
+ AC_ARG_ENABLE($1,
+ AC_HELP_STRING([--disable-$1], [Disable pam_$1]),
+ [build_$1=$enableval],
+ [build_$1=m4_if([$2],[],yes,m4_if([$3],[],probe,[$3]))])
+ m4_pushdef([upmodname],translit($1, [a-z.-], [A-Z__]))
+ m4_if([$2],[],,[if test $build_$1 != no; then
+ $2
+ test $build_$1 = probe && build_$1=no
+ fi])
+ AM_CONDITIONAL([GR_COND_]upmodname, [test "$[]build_$1" = "yes"])
+ m4_popdef([upmodname])
+])
+
+dnl GR_FLUSHLEFT -- remove all whitespace at the beginning of lines
+dnl This is useful for c-code which may include cpp statements
+dnl
+define([GR_FLUSHLEFT],
+ [changequote(`,')dnl
+patsubst(`$1', `^[ ]+')
+changequote([,])])dnl
+
+dnl GR_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 not `no'
+dnl $3 -- FALSE -- what to do otherwise; defaults to `:'
+dnl
+AC_DEFUN([GR_RESULT_ACTIONS], [
+[if test "$$1" != "" -a "$$1" != no; then
+ ]ifelse([$3], ,
+ [AC_DEFINE(HAVE_]translit($2, [a-z ./<>], [A-Z___])[,1,[FIXME])],
+ [$3])[
+else
+ ]ifelse([$4], , [:], [$4])[
+fi]])dnl
+
+dnl GR_CHECK_STRUCT_FIELD -- See if a structure has a particular field
+dnl $1 - NAME -- name of structure
+dnl $2 - FIELD -- name of field to test
+dnl $3 - INCLS -- C program text to inculde necessary files for testing
+dnl $4 - TRUE -- what to do if struct NAME has FIELD; defaults to
+dnl `AC_DEFINE(HAVE_NAME_FIELD)'
+dnl $5 - FALSE -- what to do if not; defaults to `:'
+dnl
+dnl NOTE: We still don't use AC_CHECK_MEMBERS, since it has (as of
+dnl autoconf 2.53) a bug which prevents it from recognizing members
+dnl of aggregate type.
+
+AC_DEFUN([GR_CHECK_STRUCT_FIELD], [
+ define([pm_CVAR], [pm_cv_struct_]translit($1_$2, [A-Z], [a-z]))dnl
+ AC_CACHE_CHECK([whether struct $1 has $2 field], pm_CVAR,
+ AC_TRY_COMPILE(GR_FLUSHLEFT([$3]),
+ [struct $1 pm_x; int pm_y = sizeof pm_x.$2;],
+ pm_CVAR[=yes], pm_CVAR[=no]))
+ GR_RESULT_ACTIONS(pm_CVAR, [$1_$2], [$4], [$5])dnl
+ undefine([pm_CVAR])])dnl
+
+dnl Arguments:
+dnl $1 -- Library to look for
+dnl $2 -- Function to check in the library
+dnl $3 -- Any additional libraries that might be needed
+dnl $4 -- Action to be taken when test succeeds
+dnl $5 -- Action to be taken when test fails
+dnl $6 -- Directories where the library may reside
+AC_DEFUN([GR_CHECK_LIB],
+[m4_ifval([$4], , [AH_CHECK_LIB([$1])])dnl
+AS_VAR_PUSHDEF([pm_Lib], [pm_cv_lib_$1])dnl
+AC_CACHE_CHECK([for $2 in -l$1], [pm_Lib],
+[AS_VAR_SET([pm_Lib], [no])
+ pm_check_lib_save_LIBS=$LIBS
+ for path in "" $6
+ do
+ if test -n "$path"; then
+ pm_ldflags="-L$path -l$1 $3"
+ else
+ pm_ldflags="-l$1 $3"
+ fi
+ LIBS="$pm_ldflags $pm_check_lib_save_LIBS"
+ AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
+ [AS_VAR_SET([pm_Lib], ["$pm_ldflags"])
+ break])
+ done
+ LIBS=$pm_check_lib_save_LIBS])
+AS_IF([test "AS_VAR_GET([pm_Lib])" != no],
+ [m4_default([$4], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
+ LIBS="-l$1 $LIBS"
+])],
+ [$5])dnl
+AS_VAR_POPDEF([pm_Lib])dnl
+])# GR_CHECK_LIB
+
+

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