From b4255de024c2225a5a7e407ecf122953eeaa49fc Mon Sep 17 00:00:00 2001
From: Lubomir Sedlacik <salo@silcnet.org>
Date: Wed, 23 Jul 2003 21:03:17 +0000
Subject: [PATCH] Disable optimisations for sha1.c on UltraSPARC cpu if using
 GCC 2.x. Works around a compiler bug which results in memory exhaustion.

---
 configure.in.pre          | 23 +++++++++++++++++++++++
 lib/silccrypt/Makefile.am |  7 +++++++
 2 files changed, 30 insertions(+)

diff --git a/configure.in.pre b/configure.in.pre
index ea80702f..9b3979f7 100644
--- a/configure.in.pre
+++ b/configure.in.pre
@@ -361,6 +361,29 @@ else
   fi
 fi
 
+#
+# Workaround a bug in GCC 2.x which causes memory exhaustion
+# when compiling sha1 with optimizations on UltraSPARC.
+#
+FIX_SHA1='#'
+if test "$GCC" -a "$host_cpu" = "sparc64"; then
+  AC_MSG_CHECKING(whether to enable GCC 2.x workaround for SHA1)
+  AC_TRY_COMPILE(
+    [
+      #if defined(__sparc64__) && (__GNUC__ == 2)
+      #else
+      choke me
+      #endif
+    ],
+    [],
+    [
+      FIX_SHA1=''
+      AC_MSG_RESULT(yes)
+    ],
+      AC_MSG_RESULT(no)
+    )
+fi
+AC_SUBST(FIX_SHA1)
 
 ##
 ##  Installation
diff --git a/lib/silccrypt/Makefile.am b/lib/silccrypt/Makefile.am
index 47f72044..3dd281ca 100644
--- a/lib/silccrypt/Makefile.am
+++ b/lib/silccrypt/Makefile.am
@@ -73,3 +73,10 @@ endif
 EXTRA_DIST = *.h tests
 
 include $(top_srcdir)/Makefile.defines.in
+
+# Workaround a bug in GCC 2.x which causes memory exhaustion
+# when compiling sha1 with optimizations on UltraSPARC.
+#
+@FIX_SHA1@sha1.lo:
+@FIX_SHA1@	$(LTCOMPILE) -O0 -c -o $@ `test -f 'sha1.c' || echo '$(srcdir)/'`sha1.c
+@FIX_SHA1@
-- 
2.43.0