From fd2fd983c5b1aa7d079e92e46a67c16f231fac5b Mon Sep 17 00:00:00 2001
From: Augustin Cavalier <waddlesplash@gmail.com>
Date: Wed, 20 Feb 2019 19:31:21 -0500
Subject: [PATCH] gcc/mpfr: Disable LTO unconditionally.

This is kind of a hack, but really it's the configure script that
is broken, as it hard-checks for "gcc-ar" which of course does not
work with Clang builds. We want LTO to be enabled in GCC, and
GCC unconditionally passes all arguments it gets to sub-configures,
so all we can do is stop the flag from having any effect.

Fixes #14733.
---
 gcc/mpfr/configure | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/gcc/mpfr/configure b/gcc/mpfr/configure
index 6089eee..d4c5aa4 100755
--- a/gcc/mpfr/configure
+++ a/gcc/mpfr/configure
@@ -13399,16 +13399,17 @@
 
 
 # Check whether --enable-lto was given.
+enable_lto=no
 if test "${enable_lto+set}" = set; then :
-  enableval=$enable_lto;  case $enableval in
-      yes)  if test "$enable_shared" != "no"; then
-              as_fn_error $? "--enable-lto can only work in static mode (--disable-shared)" "$LINENO" 5
-            fi
-            enable_lto=yes
-            ;;
-      no)   ;;
-      *)    as_fn_error $? "bad value for --enable-lto: yes or no" "$LINENO" 5 ;;
-     esac
+#  enableval=$enable_lto;  case $enableval in
+#      yes)  if test "$enable_shared" != "no"; then
+#              as_fn_error $? "--enable-lto can only work in static mode (--disable-shared)" "$LINENO" 5
+#            fi
+#            enable_lto=yes
+#            ;;
+#      no)   ;;
+#      *)    as_fn_error $? "bad value for --enable-lto: yes or no" "$LINENO" 5 ;;
+#     esac
 fi
 
 
--
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