1# Copyright (C) 2001, 2006, 2008-2012, 2014-2015, 2018 Sergey Poznyakoff
2#
3# This program is free software; you can redistribute it and/or modify
4# it under the terms of the GNU General Public License as published by
5# the Free Software Foundation; either version 3, or (at your option)
6# any later version.
7#
8# This program is distributed in the hope that it will be useful,
9# but WITHOUT ANY WARRANTY; without even the implied warranty of
10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11# GNU General Public License for more details.
12#
13# You should have received a copy of the GNU General Public License along
14# with this program.  If not, see <http://www.gnu.org/licenses/>.
15
16AC_DEFUN([PM_ENABLE],[
17  AC_ARG_ENABLE($1,
18                AC_HELP_STRING([--disable-$1], [Disable pam_$1]),
19                [build_$1=$enableval],
20		[build_$1=m4_if([$2],[],yes,probe)])
21  m4_pushdef([upmodname],translit($1, [a-z.-], [A-Z__]))
22  m4_if([$2],[],,[if test $build_$1 != no; then
23    $2
24    test $build_$1 = probe && build_$1=no
25  fi])
26  AM_CONDITIONAL([PAM_COND_]upmodname, [test "$[]build_$1" = "yes"])
27  m4_popdef([upmodname])
28])
29
30dnl PM_FLUSHLEFT -- remove all whitespace at the beginning of lines
31dnl This is useful for c-code which may include cpp statements
32dnl
33define([PM_FLUSHLEFT],
34 [changequote(`,')dnl
35patsubst(`$1', `^[ 	]+')
36changequote([,])])dnl
37
38dnl PM_RESULT_ACTIONS -- generate shell code for the result of a test
39dnl   $1 -- CVAR  -- cache variable to check
40dnl   $2 -- NAME  -- if not empty, used to generate a default value TRUE:
41dnl                  `AC_DEFINE(HAVE_NAME)'
42dnl   $2 -- TRUE  -- what to do if the CVAR is not `no'
43dnl   $3 -- FALSE -- what to do otherwise; defaults to `:'
44dnl
45AC_DEFUN([PM_RESULT_ACTIONS], [
46[if test "$$1" != "" -a "$$1" != no; then
47  ]ifelse([$3], ,
48          [AC_DEFINE(HAVE_]translit($2, [a-z ./<>], [A-Z___])[,1,[FIXME])],
49          [$3])[
50else
51  ]ifelse([$4], , [:], [$4])[
52fi]])dnl
53
54dnl PM_CHECK_STRUCT_FIELD -- See if a structure has a particular field
55dnl   $1 - NAME  -- name of structure
56dnl   $2 - FIELD -- name of field to test
57dnl   $3 - INCLS -- C program text to inculde necessary files for testing
58dnl   $4 - TRUE  -- what to do if struct NAME has FIELD; defaults to
59dnl		    `AC_DEFINE(HAVE_NAME_FIELD)'
60dnl   $5 - FALSE -- what to do if not; defaults to `:'
61dnl
62dnl NOTE: We still don't use AC_CHECK_MEMBERS, since it has (as of
63dnl autoconf 2.53) a bug which prevents it from recognizing members
64dnl of aggregate type.
65
66AC_DEFUN([PM_CHECK_STRUCT_FIELD], [
67  define([pm_CVAR], [pm_cv_struct_]translit($1_$2, [A-Z], [a-z]))dnl
68  AC_CACHE_CHECK([whether struct $1 has $2 field], pm_CVAR,
69    AC_TRY_COMPILE(PM_FLUSHLEFT([$3]),
70      [struct $1 pm_x; int pm_y = sizeof pm_x.$2;],
71      pm_CVAR[=yes], pm_CVAR[=no]))
72  PM_RESULT_ACTIONS(pm_CVAR, [$1_$2], [$4], [$5])dnl
73  undefine([pm_CVAR])])dnl
74
75dnl Arguments:
76dnl   $1     --    Library to look for
77dnl   $2     --    Function to check in the library
78dnl   $3     --    Any additional libraries that might be needed
79dnl   $4     --    Action to be taken when test succeeds
80dnl   $5     --    Action to be taken when test fails
81dnl   $6     --    Directories where the library may reside
82AC_DEFUN([PM_CHECK_LIB],
83[m4_ifval([$4], , [AH_CHECK_LIB([$1])])dnl
84AS_VAR_PUSHDEF([pm_Lib], [pm_cv_lib_$1])dnl
85AC_CACHE_CHECK([for $2 in -l$1], [pm_Lib],
86[AS_VAR_SET([pm_Lib], [no])
87 pm_check_lib_save_LIBS=$LIBS
88 for path in "" $6
89 do
90   if test -n "$path"; then
91     pm_ldflags="-L$path -l$1 $3"
92   else
93     pm_ldflags="-l$1 $3"
94   fi
95   LIBS="$pm_ldflags $pm_check_lib_save_LIBS"
96   AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
97                  [AS_VAR_SET([pm_Lib], ["$pm_ldflags"])
98		   break])
99 done
100 LIBS=$pm_check_lib_save_LIBS])
101AS_IF([test "AS_VAR_GET([pm_Lib])" != no],
102      [m4_default([$4], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
103  LIBS="-l$1 $LIBS"
104])],
105      [$5])dnl
106AS_VAR_POPDEF([pm_Lib])dnl
107])# PM_CHECK_LIB
108
109
110