+# $Id: aclocal.m4,v 1.20 1998/03/03 19:04:48 reid Exp $
#
# Extra autoconf macros for the Glasgow fptools
#
#
+# Are we running under the GNU libc? Need -D_GNU_SOURCE to get
+# caddr_t and such.
+#
+AC_DEFUN(AC_GNU_LIBC,
+[AC_CACHE_CHECK([GNU libc], ac_cv_gnu_libc,
+[AC_EGREP_CPP(yes,
+[#include <features.h>
+#ifdef __GLIBC__
+yes
+#endif
+], ac_cv_gnu_libc=yes, ac_cv_gnu_libc=no)])
+if test "$ac_cv_gnu_libc" = yes; then
+ AC_DEFINE(_GNU_SOURCE)
+fi
+])
+
+#
# Has timezone the type time_t or long (HP-UX 10.20 apparently
# has `long'..)
#
# Hack!: nlist() under Digital UNIX insist on there being an _,
# but symbol table listings show none. What is going on here?!?
#
-if test $HostPlatform = "alpha-dec-osf1"; then
- ac_cv_lead_uscore='no'
-else
+changequote(<<, >>)dnl
+<<
+case $HostPlatform in
+alpha-dec-osf*) ac_cv_lead_uscore='no';;
+*) >>
+changequote([, ])dnl
AC_TRY_RUN([#ifdef HAVE_NLIST_H
#include <nlist.h>
changequote(<<, >>)dnl
#endif
exit(1);
}], ac_cv_lead_uscore=yes, ac_cv_lead_uscore=no, ac_cv_lead_uscore=NO)
-fi);
+;;
+esac);
LeadingUnderscore=`echo $ac_cv_lead_uscore | sed 'y/yesno/YESNO/'`
AC_SUBST(LeadingUnderscore)
])
ac_cv_have_gcc='no'
else
changequote(, )dnl
- cmd_string="`$CC -v 2>&1 | grep 'version ' | sed -e 's/.*version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/expr 20 \\\< \1 \\\* 10 + \2/g' `"
+ cmd_string="`$CC -v 2>&1 | grep 'version ' | sed -e 's/.*version [^0-9]*\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/expr 20 \\\< \1 \\\* 10 + \2/g' `"
changequote([, ])dnl
if test `eval $cmd_string 2>/dev/null` != "1"; then
echo ''
[if test "$HaveGcc" = "YES"; then
echo > conftest.c
gcc -v -E conftest.c >/dev/null 2>conftest.out
- echo '/(\S+(\/|\\\\)cpp)/ && print "[$]1";' > conftest.pl
+ # \x5c = backslash
+ echo 'tr/\x5c/\//; /(\S+\/cpp)/ && print "[$]1";' > conftest.pl
ac_cv_gnu_cpp="`eval $PerlCmd -n conftest.pl conftest.out`"
rm -fr conftest*
else
fi
rm -fr conftest*
])
+
+dnl ** figure out whether types can be word-aligned
+dnl (test based on test in smalltalk-1.1.5 configuration)
+dnl (required SIZEOF test but AC_CHECK_SIZEOF doesn't call PROVIDE
+dnl so we can't call REQUIRE)
+
+dnl GHC_CHECK_ALIGNMENT(TYPE)
+AC_DEFUN(GHC_CHECK_ALIGNMENT,
+[changequote(<<, >>)dnl
+dnl The name to #define.
+define(<<AC_TYPE_NAME>>, translit(alignment_$1, [a-z *], [A-Z_P]))dnl
+dnl The cache variable name.
+define(<<AC_CV_NAME>>, translit(ac_cv_alignment_$1, [ *], [_p]))dnl
+dnl The name of the corresponding size.
+define(<<AC_CV_SIZEOF_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
+changequote([, ])dnl
+AC_MSG_CHECKING(alignment of $1)
+AC_CACHE_VAL(AC_CV_NAME,
+[AC_TRY_RUN([
+main()
+{
+ unsigned int vec[3];
+ $1 test, *testptr;
+
+ test = *($1 *)&vec[1];
+ testptr = ($1 *)&vec[1];
+ *testptr = test;
+
+ exit(0);
+}
+],
+AC_CV_NAME=$ac_cv_sizeof_unsigned_int,
+AC_CV_NAME=$AC_CV_SIZEOF_NAME,
+AC_CV_NAME=$AC_CV_SIZEOF_NAME)])
+AC_MSG_RESULT($AC_CV_NAME)
+AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME)
+AC_PROVIDE($AC_TYPE_NAME)
+undefine([AC_TYPE_NAME])dnl
+undefine([AC_CV_NAME])dnl
+undefine([AC_CV_SIZEOF_NAME])dnl
+])
+