--- /dev/null
+dnl $Id: ensc_dietlibc.m4,v 1.15 2005/05/05 19:13:52 ensc Exp $
+
+dnl Copyright (C) 2002 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+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; version 2 of the License.
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+AC_DEFUN([_ENSC_DIETLIBC_C99],
+[
+ AH_TEMPLATE([ENSC_DIETLIBC_C99], [Define to 1 if dietlibc supports C99])
+
+ AC_CACHE_CHECK([whether dietlibc supports C99], [ensc_cv_c_dietlibc_c99],
+ [
+ _ensc_dietlibc_c99_old_CFLAGS=$CFLAGS
+ _ensc_dietlibc_c99_old_CC=$CC
+
+ CFLAGS="-std=c99"
+ CC="${DIET:-diet} $CC"
+
+ AC_LANG_PUSH(C)
+ AC_COMPILE_IFELSE([/* */],[
+ AC_COMPILE_IFELSE([
+ #include <stdint.h>
+ #include <sys/cdefs.h>
+ #if defined(inline)
+ # error 'inline' badly defined
+ #endif
+ volatile uint64_t a;
+ ],
+ [ensc_cv_c_dietlibc_c99=yes],
+ [ensc_cv_c_dietlibc_c99=no])],
+ [ensc_cv_c_dietlibc_c99='skipped (compiler does not support C99)'])
+ AC_LANG_POP
+
+ CC=$_ensc_dietlibc_c99_old_CC
+ CFLAGS=$_ensc_dietlibc_c99_old_CFLAGS
+ ])
+
+ if test x"$ensc_cv_c_dietlibc_c99" = xyes; then
+ AC_DEFINE(ENSC_DIETLIBC_C99,1)
+ fi
+])
+
+dnl Usage: ENSC_ENABLE_DIETLIBC(<conditional>[,<min-version>])
+dnl <conditional> ... automake-conditional which will be set when
+dnl dietlibc shall be enabled
+dnl provides:
+dnl * $ENSC_VERSION_DIETLIBC_NUM and
+dnl * $ENSC_VERSION_DIETLIBC
+
+AC_DEFUN([ENSC_ENABLE_DIETLIBC],
+[
+ AC_MSG_CHECKING([whether to enable dietlibc])
+
+ AC_ARG_VAR(DIET, [The 'diet' wrapper (default: diet)])
+ AC_ARG_VAR(DIETFLAGS, [Flags passed to the 'diet' wrapper (default: -O)])
+
+ : ${DIET:=diet}
+ : ${DIETFLAGS=-Os}
+
+ AC_ARG_ENABLE([dietlibc],
+ [AS_HELP_STRING([--disable-dietlibc],
+ [do not use dietlibc resp. enforce its usage
+ (with --enable-dietlibc) (default: autodetect dietlibc)])],
+ [case "$enableval" in
+ (yes) use_dietlibc=forced;;
+ (no) use_dietlibc=forced_no;;
+ (*) AC_MSG_ERROR(['$enableval' is not a valid value for --enable-dietlibc]);;
+ esac],
+ [which "$DIET" >/dev/null 2>/dev/null && use_dietlibc=detected || use_dietlibc=detected_no])
+
+ if test "$use_dietlibc" = detected -a "$2"; then
+ _dietlibc_ver=$($DIET -v 2>&1 | sed '1p;d')
+ _dietlibc_ver=${_dietlibc_ver##*diet version }
+ _dietlibc_ver=${_dietlibc_ver##*dietlibc-}
+ _dietlibc_ver_maj=${_dietlibc_ver%%.*}
+ _dietlibc_ver_min=${_dietlibc_ver##*.}
+ _dietlibc_ver_min=${_dietlibc_ver_min%%[[!0-9]]*}
+ _dietlibc_cmp="$2"
+ _dietlibc_cmp_maj=${_dietlibc_cmp%%.*}
+ _dietlibc_cmp_min=${_dietlibc_cmp##*.}
+
+ ENSC_VERSION_DIETLIBC=$_dietlibc_ver_maj.$_dietlibc_ver_min
+
+ let _dietlibc_ver=_dietlibc_ver_maj*1000+_dietlibc_ver_min 2>/dev/null || _dietlibc_ver=0
+ let _dietlibc_cmp=_dietlibc_cmp_maj*1000+_dietlibc_cmp_min
+
+ test $_dietlibc_ver -ge $_dietlibc_cmp || use_dietlibc=detected_old
+ else
+ ENSC_VERSION_DIETLIBC=
+ _dietlibc_ver=-1
+ fi
+
+ ENSC_VERSION_DIETLIBC_NUM=$_dietlibc_ver
+ ensc_have_dietlibc=no
+
+ case x"$use_dietlibc" in
+ xdetected)
+ AM_CONDITIONAL($1, true)
+ AC_MSG_RESULT([yes (autodetected, $ENSC_VERSION_DIETLIBC)])
+ ensc_have_dietlibc=yes
+ ;;
+ xforced)
+ AM_CONDITIONAL($1, true)
+ AC_MSG_RESULT([yes (forced)])
+ ensc_have_dietlibc=yes
+ ;;
+ xdetected_no)
+ AM_CONDITIONAL($1, false)
+ AC_MSG_RESULT([no (detected)])
+ ;;
+ xdetected_old)
+ AM_CONDITIONAL($1, false)
+ AC_MSG_RESULT([no (too old; $2+ required, $ENSC_VERSION_DIETLIBC found)])
+ ;;
+ xforced_no)
+ AM_CONDITIONAL($1, false)
+ AC_MSG_RESULT([no (forced)])
+ ;;
+ *)
+ AC_MSG_ERROR([internal error, use_dietlibc was "$use_dietlibc"])
+ ;;
+ esac
+
+ if test x"$ensc_have_dietlibc" != xno; then
+ _ENSC_DIETLIBC_C99
+ fi
+])
+
+
+dnl Usage: ENSC_DIETLIBC_SANITYCHECK
+AC_DEFUN([ENSC_DIETLIBC_SANITYCHECK],
+[
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ AC_REQUIRE([ENSC_ENABLE_DIETLIBC])
+
+ if test "$host_cpu" = x86_64 -a $ENSC_VERSION_DIETLIBC_NUM -le 0027; then
+ AC_MSG_WARN([*** ***])
+ AC_MSG_WARN([*** dietlibc<=0.27 is known to be broken for x86_64 systems ***])
+ AC_MSG_WARN([*** please make sure that at least the environ.S fix is applied ***])
+ AC_MSG_WARN([*** and lib/__nice.c added ***])
+ AC_MSG_WARN([*** ***])
+ fi
+])
git://git.onelab.eu / util-vserver.git / blobdiff