From 52c56bba30ddea27a0a7179da89cac1c71228de6 Mon Sep 17 00:00:00 2001
From: Thorsten Otto <admin@tho-otto.de>
Date: Mon, 23 Dec 2019 08:43:00 +0100
Subject: [PATCH] Add -no-lto when trying to compile the floating point format
 test (needed on openSuSE Tumbleweed, and maybe others)

---
 ChangeLog   |  5 +++++
 m4/float.m4 | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index bc8d6db8f..8455838bf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2019/12/23
+Add -no-lto when trying to compile the floating point format test
+(needed on openSuSE Tumbleweed, and maybe others)
+
+
 2019/12/11
 Release shift keys when we are about to loose input focus,
 to avoid having stuck keys after alt-tabbing out of the window
diff --git a/m4/float.m4 b/m4/float.m4
index a60d7e8aa..6e2ea21d8 100644
--- a/m4/float.m4
+++ b/m4/float.m4
@@ -23,7 +23,19 @@ cat > conftest.$ac_ext <<EOF
 #include "confdefs.h"
 $1
 ]EOF
+ac_save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fno-lto"
+gcc_ac_compile_ok=0
 if AC_TRY_EVAL(ac_compile); then
+  gcc_ac_compile_ok=1
+else
+  CFLAGS=$ac_save_CFLAGS
+  if AC_TRY_EVAL(ac_compile); then
+    gcc_ac_compile_ok=1
+  fi
+fi
+CFLAGS="$ac_save_CFLAGS"
+if test "$gcc_ac_compile_ok" = 1; then
   od -c conftest.o |
     sed ['s/^[0-7]*[ 	]*/ /
 	  s/\*/./g