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109 lines
3.8 KiB
Text
109 lines
3.8 KiB
Text
# Copyright (C) 2001-2022 Sergey Poznyakoff
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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AC_DEFUN([PM_ENABLE],[
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AC_ARG_ENABLE($1,
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AS_HELP_STRING([--disable-$1], [Disable pam_$1]),
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[build_$1=$enableval],
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[build_$1=m4_if([$2],[],yes,probe)])
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m4_pushdef([upmodname],translit($1, [a-z.-], [A-Z__]))
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m4_if([$2],[],,[if test $build_$1 != no; then
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$2
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test $build_$1 = probe && build_$1=no
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fi])
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AM_CONDITIONAL([PAM_COND_]upmodname, [test "$[]build_$1" = "yes"])
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m4_popdef([upmodname])
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])
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dnl PM_FLUSHLEFT -- remove all whitespace at the beginning of lines
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dnl This is useful for c-code which may include cpp statements
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dnl
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define([PM_FLUSHLEFT],
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[changequote(`,')dnl
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patsubst(`$1', `^[ ]+')
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changequote([,])])dnl
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dnl PM_RESULT_ACTIONS -- generate shell code for the result of a test
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dnl $1 -- CVAR -- cache variable to check
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dnl $2 -- NAME -- if not empty, used to generate a default value TRUE:
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dnl `AC_DEFINE(HAVE_NAME)'
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dnl $2 -- TRUE -- what to do if the CVAR is not `no'
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dnl $3 -- FALSE -- what to do otherwise; defaults to `:'
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dnl
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AC_DEFUN([PM_RESULT_ACTIONS], [
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[if test "$$1" != "" -a "$$1" != no; then
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]ifelse([$3], ,
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[AC_DEFINE(HAVE_]translit($2, [a-z ./<>], [A-Z___])[,1,[FIXME])],
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[$3])[
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else
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]ifelse([$4], , [:], [$4])[
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fi]])dnl
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dnl PM_CHECK_STRUCT_FIELD -- See if a structure has a particular field
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dnl $1 - NAME -- name of structure
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dnl $2 - FIELD -- name of field to test
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dnl $3 - INCLS -- C program text to inculde necessary files for testing
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dnl $4 - TRUE -- what to do if struct NAME has FIELD; defaults to
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dnl `AC_DEFINE(HAVE_NAME_FIELD)'
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dnl $5 - FALSE -- what to do if not; defaults to `:'
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dnl
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dnl NOTE: We still don't use AC_CHECK_MEMBERS, since it has (as of
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dnl autoconf 2.53) a bug which prevents it from recognizing members
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dnl of aggregate type.
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AC_DEFUN([PM_CHECK_STRUCT_FIELD], [
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define([pm_CVAR], [pm_cv_struct_]translit($1_$2, [A-Z], [a-z]))dnl
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AC_CACHE_CHECK([whether struct $1 has $2 field], pm_CVAR,
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AC_TRY_COMPILE(PM_FLUSHLEFT([$3]),
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[struct $1 pm_x; int pm_y = sizeof pm_x.$2;],
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pm_CVAR[=yes], pm_CVAR[=no]))
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PM_RESULT_ACTIONS(pm_CVAR, [$1_$2], [$4], [$5])dnl
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undefine([pm_CVAR])])dnl
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dnl Arguments:
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dnl $1 -- Library to look for
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dnl $2 -- Function to check in the library
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dnl $3 -- Any additional libraries that might be needed
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dnl $4 -- Action to be taken when test succeeds
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dnl $5 -- Action to be taken when test fails
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dnl $6 -- Directories where the library may reside
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AC_DEFUN([PM_CHECK_LIB],
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[m4_ifval([$4], , [AH_CHECK_LIB([$1])])dnl
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AS_VAR_PUSHDEF([pm_Lib], [pm_cv_lib_$1])dnl
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AC_CACHE_CHECK([for $2 in -l$1], [pm_Lib],
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[AS_VAR_SET([pm_Lib], [no])
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pm_check_lib_save_LIBS=$LIBS
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for path in "" $6
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do
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if test -n "$path"; then
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pm_ldflags="-L$path -l$1 $3"
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else
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pm_ldflags="-l$1 $3"
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fi
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LIBS="$pm_ldflags $pm_check_lib_save_LIBS"
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AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
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[AS_VAR_SET([pm_Lib], ["$pm_ldflags"])
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break])
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done
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LIBS=$pm_check_lib_save_LIBS])
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AS_IF([test "AS_VAR_GET([pm_Lib])" != no],
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[m4_default([$4], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
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LIBS="-l$1 $LIBS"
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])],
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[$5])dnl
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AS_VAR_POPDEF([pm_Lib])dnl
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])# PM_CHECK_LIB
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