diff --git a/ChangeLog b/ChangeLog
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/ChangeLog.pre-2-0 b/ChangeLog.pre-2-0
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog.pre-2-0
+++ b/ChangeLog.pre-2-0
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/ChangeLog.pre-2-10 b/ChangeLog.pre-2-10
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog.pre-2-10
+++ b/ChangeLog.pre-2-10
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/ChangeLog.pre-2-2 b/ChangeLog.pre-2-2
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog.pre-2-2
+++ b/ChangeLog.pre-2-2
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/ChangeLog.pre-2-4 b/ChangeLog.pre-2-4
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog.pre-2-4
+++ b/ChangeLog.pre-2-4
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/ChangeLog.pre-2-6 b/ChangeLog.pre-2-6
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog.pre-2-6
+++ b/ChangeLog.pre-2-6
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/ChangeLog.pre-2-8 b/ChangeLog.pre-2-8
index 31a1899cff..e3c514c3a7 100644
--- a/ChangeLog.pre-2-8
+++ b/ChangeLog.pre-2-8
@@ -1,3 +1,7 @@
+Mon Sep  7 22:20:40 PDT 1998 Manish Singh <yosh@gimp.org>
+
+	* configure.in: added -std1 check for ANSI compliance
+
 Thu Aug 13 09:11:11 BST 1998  Tony Gale  <gale@gtk.org>
 
         * docs/gtk_tut.sgml:
diff --git a/configure.in b/configure.in
index 3d396a3297..62fc511b33 100644
--- a/configure.in
+++ b/configure.in
@@ -85,6 +85,26 @@ if test "x$GCC" = "xyes"; then
   fi
 fi
 
+dnl DU4 native cc currently needs -std1 for ANSI mode (instead of K&R)
+AC_MSG_CHECKING([for extra flags to get ANSI library prototypes])
+gtk_save_LIBS=$LIBS
+LIBS="$LIBS -lm"
+AC_TRY_RUN([#include <math.h>
+             int main (void) { return (log(1) != log(1.)); }],
+     AC_MSG_RESULT(none needed),
+     gtk_save_CFLAGS=$CFLAGS
+     CFLAGS="$CFLAGS -std1"
+     AC_TRY_RUN([#include <math.h>
+                 int main (void) { return (log(1) != log(1.)); }],
+         AC_MSG_RESULT(-std1),
+         AC_MSG_RESULT()
+         CFLAGS=$gtk_save_CFLAGS
+         AC_MSG_WARN(
+                [No ANSI prototypes found in library. (-std1 didn't work.)])
+     )
+)
+LIBS=$gtk_save_LIBS
+
 if test "x$enable_xim" = "xyes"; then
   CFLAGS="$CFLAGS -DUSE_XIM"
 fi