From 08c5cc05abd626370d12ccee16db0978caeb9e60 Mon Sep 17 00:00:00 2001
From: reid <unknown>
Date: Tue, 3 Mar 1998 19:04:50 +0000
Subject: [PATCH] [project @ 1998-03-03 19:04:47 by reid] Added alignment tests
---
acconfig.h | 9 +++++++++
aclocal.m4 | 44 +++++++++++++++++++++++++++++++++++++++++++-
configure.in | 15 +++++++++++++--
3 files changed, 65 insertions(+), 3 deletions(-)
diff --git a/acconfig.h b/acconfig.h
index 5c8dbcb49edc..d77c28956623 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -59,6 +59,15 @@
/* Define to unsigned long long int if <sys/types.h> doesn't define */
#undef ullong
+/* Define to alignment constraint on doubles or on unsigned int - whichever is the greater */
+#undef ALIGNMENT_DOUBLE
+
+/* Define to alignment constraint on floats or on unsigned int - whichever is the greater */
+#undef ALIGNMENT_FLOAT
+
+/* Define to alignment constraint on unsigned int - whichever is the greater */
+#undef ALIGNMENT_UNSIGNED_INT
+
/* Leave that blank line there!! Autoheader needs it.
If you're adding to this file, keep in mind:
diff --git a/aclocal.m4 b/aclocal.m4
index 0535dc107250..d1f9a6436481 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,4 +1,4 @@
-# $Id: aclocal.m4,v 1.19 1998/03/03 04:45:07 reid Exp $
+# $Id: aclocal.m4,v 1.20 1998/03/03 19:04:48 reid Exp $
#
# Extra autoconf macros for the Glasgow fptools
#
@@ -340,3 +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
+])
+
diff --git a/configure.in b/configure.in
index 7487fc9a8c7d..f14eab27453c 100644
--- a/configure.in
+++ b/configure.in
@@ -443,13 +443,24 @@ dnl ** how do we get a timezone name, and UTC offset ?
AC_STRUCT_TIMEZONE
#
-dnl what's the type of timezone?
+dnl ** what's the type of timezone?
AC_TYPE_TIMEZONE
#
-dnl do we have altzone?
+dnl ** do we have altzone?
AC_ALTZONE
+dnl ** what are the sizes of various types
+dnl (these must come before GHC_CHECK_ALIGNMENT)
+AC_CHECK_SIZEOF(unsigned int,4)
+AC_CHECK_SIZEOF(float,4)
+AC_CHECK_SIZEOF(double,8)
+
+dnl ** what are alignment constraints on various types
+GHC_CHECK_ALIGNMENT(unsigned int) dnl redundant but harmless
+GHC_CHECK_ALIGNMENT(float)
+GHC_CHECK_ALIGNMENT(double)
+
#
dnl ** check for specific library functions that we are interested in
#
--
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