[project @ 1998-03-05 20:20:04 by sof]

[ghc-hetmet.git] / aclocal.m4

diff --git a/aclocal.m4 b/aclocal.m4
index 85667d2..d1f9a64 100644 (file)
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,9 +1,26 @@
-# $Id: aclocal.m4,v 1.16 1998/02/12 12:11:53 simonm Exp $
+# $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 "$ac_cv_gnu_libc" = yes; then
+  AC_DEFINE(_GNU_SOURCE)
+fi
+])
+
+#
 # Has timezone the type time_t or long (HP-UX 10.20 apparently
 # has `long'..)
 #
@@ -274,8 +291,9 @@ AC_DEFUN(AC_PROG_GNUCPP,
 [if test "$HaveGcc" = "YES"; then
        echo > conftest.c
        gcc -v -E conftest.c >/dev/null 2>conftest.out
-       echo '/(\S+(\/|\\)cpp)/ && print "[$]1";' > conftest.pl
-       ac_cv_gnu_cpp="`eval $PerlCmd -n conftest.pl conftest.out | tr '\\\' / `"
+       # \x5c = backslash
+       echo 'tr/\x5c/\//; /(\S+\/cpp)/ && print "[$]1";' > conftest.pl
+       ac_cv_gnu_cpp="`eval $PerlCmd -n conftest.pl conftest.out`"
        rm -fr conftest*
  else
        # We need to be able to invoke CPP directly, preferably
@@ -322,3 +340,45 @@ 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
+])
+