fix alignof m4 macro

DBIND_CHECK_ALIGNOF does not work when cross-compiling, so we modify
it to use AC_CHECK_ALIGNOF.

1 files changed, 15 insertions, 37 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index 6eb7916d..a4904ce2 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2,42 +2,20 @@
 # type alignment test #
 #######################
 
-AC_DEFUN([DBIND_CHECK_ALIGNOF],
-	[changequote(<<, >>)dnl
-	dnl The name to #define.
-	define(<<AC_TYPE_NAME>>,
-		translit(dbind_alignof_$1, [a-z *], [A-Z_P]))dnl
-	dnl The cache variable name.
-	define(<<AC_CV_NAME>>,
-		translit(ac_cv_alignof_$1, [ *], [_p]))dnl
-	changequote([, ])dnl
-	AC_MSG_CHECKING(alignment of $1)
-	AC_CACHE_VAL(AC_CV_NAME,
-		[AC_TRY_RUN(
-			[ #include <stdio.h>
-                          #include <stdlib.h>
-                          #define DBUS_API_SUBJECT_TO_CHANGE
-			  #include <dbus/dbus.h>
-			typedef struct {char s1;} dbind_struct;
-			typedef void *dbind_pointer;
-			struct test {char s1; $1 s2;};
-			main()
-			{
-			FILE *f=fopen("conftestval", "w");
-			if (!f) exit(1);
-			fprintf(f, "%d\n", &(((struct test*)0)->s2));
-			exit(0);
-			} ],
-			AC_CV_NAME=`cat conftestval`,
-			AC_CV_NAME=0, AC_CV_NAME=0)
-		])dnl
-	AC_MSG_RESULT($AC_CV_NAME)
-	if test "$AC_CV_NAME" = "0" ; then
-		AC_MSG_ERROR([Failed to find alignment. Check config.log for details.])
-	fi
-	AC_TYPE_NAME=$AC_CV_NAME
-	AC_SUBST(AC_TYPE_NAME)
-	undefine([AC_TYPE_NAME])dnl
-	undefine([AC_CV_NAME])dnl
+AC_DEFUN([DBIND_CHECK_ALIGNOF],[
+AC_CHECK_ALIGNOF($1,[
+#include <stdio.h>
+#include <stdlib.h>
+#define DBUS_API_SUBJECT_TO_CHANGE
+#include <dbus/dbus.h>
+typedef struct {char s1;} dbind_struct;
+typedef void *dbind_pointer;
+])
+
+dnl Note that we substitute for names like @DBIND_ALIGNOF_DBIND_STRUCT@, but
+dnl we #define names like ALIGNOF_DBIND_STRUCT in config.h!
+dnl
+AC_SUBST(translit(dbind_alignof_$1, [a-z *], [A-Z_P]),[$ac_cv_alignof_$1])
+
 ])