3 dnl Copyright (C) 2002 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 dnl This program is free software; you can redistribute it and/or modify
6 dnl it under the terms of the GNU General Public License as published by
7 dnl the Free Software Foundation; version 2 of the License.
9 dnl This program is distributed in the hope that it will be useful,
10 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
11 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 dnl GNU General Public License for more details.
14 dnl You should have received a copy of the GNU General Public License
15 dnl along with this program; if not, write to the Free Software
16 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 AC_DEFUN([_ENSC_DIETLIBC_C99],
20 AH_TEMPLATE([ENSC_DIETLIBC_C99], [Define to 1 if dietlibc supports C99])
22 AC_CACHE_CHECK([whether dietlibc supports C99], [ensc_cv_c_dietlibc_c99],
24 _ensc_dietlibc_c99_old_CFLAGS=$CFLAGS
25 _ensc_dietlibc_c99_old_CC=$CC
28 CC="${DIET:-diet} $CC"
31 AC_COMPILE_IFELSE([/* */],[
34 #include <sys/cdefs.h>
36 # error 'inline' badly defined
40 [ensc_cv_c_dietlibc_c99=yes],
41 [ensc_cv_c_dietlibc_c99=no])],
42 [ensc_cv_c_dietlibc_c99='skipped (compiler does not support C99)'])
45 CC=$_ensc_dietlibc_c99_old_CC
46 CFLAGS=$_ensc_dietlibc_c99_old_CFLAGS
49 if test x"$ensc_cv_c_dietlibc_c99" = xyes; then
50 AC_DEFINE(ENSC_DIETLIBC_C99,1)
54 dnl Usage: ENSC_ENABLE_DIETLIBC(<conditional>[,<min-version>])
55 dnl <conditional> ... automake-conditional which will be set when
56 dnl dietlibc shall be enabled
58 AC_DEFUN([ENSC_ENABLE_DIETLIBC],
60 AC_MSG_CHECKING([whether to enable dietlibc])
61 AC_ARG_ENABLE([dietlibc],
62 [AC_HELP_STRING([--disable-dietlibc],
63 [do not use dietlibc (default: use dietlibc)])],
65 yes) use_dietlibc=forced;;
66 no) use_dietlibc=forced_no;;
67 *) AC_MSG_ERROR(['$enableval' is not a valid value for --enable-dietlibc]);;
70 which "$DIET" >/dev/null 2>/dev/null && use_dietlibc=detected || use_dietlibc=detected_no])
72 if test "$use_dietlibc" = detected -a '$2'; then
73 _dietlibc_ver=$(${DIET:-diet} -v 2>&1 | sed '1p;d')
74 _dietlibc_ver=${_dietlibc_ver##*dietlibc-}
75 _dietlibc_ver_maj=${_dietlibc_ver%%.*}
76 _dietlibc_ver_min=${_dietlibc_ver##*.}
78 _dietlibc_cmp_maj=${_dietlibc_cmp%%.*}
79 _dietlibc_cmp_min=${_dietlibc_cmp##*.}
81 let _dietlibc_ver=_dietlibc_ver_maj*1000+_dietlibc_ver_min 2>/dev/null || _dietlibc_ver=0
82 let _dietlibc_cmp=_dietlibc_cmp_maj*1000+_dietlibc_cmp_min
84 test $_dietlibc_ver -ge $_dietlibc_cmp || use_dietlibc=detected_old
88 case x"$use_dietlibc" in
90 AM_CONDITIONAL($1, true)
91 AC_MSG_RESULT([yes (autodetected)])
92 ensc_have_dietlibc=yes
95 AM_CONDITIONAL($1, true)
96 AC_MSG_RESULT([yes (forced)])
97 ensc_have_dietlibc=yes
100 AM_CONDITIONAL($1, false)
101 AC_MSG_RESULT([no (detected)])
104 AM_CONDITIONAL($1, false)
105 AC_MSG_RESULT([no (too old; $2+ required)])
108 AM_CONDITIONAL($1, false)
109 AC_MSG_RESULT([no (forced)])
112 AC_MSG_ERROR([internal error, use_dietlibc was "$use_dietlibc"])
116 if test x"$ensc_have_dietlibc" != xno; then