From efa1150d5518b74d6eb9f3609600aefc6749bd26 Mon Sep 17 00:00:00 2001
From: macro <macro@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 12 Sep 2016 14:08:48 +0000
Subject: 	* configure.ac: Check for the minimum in-tree MPFR version 
 handled. 	* configure: Regenerate.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@240092 138bc75d-0d04-0410-961f-82ee72b054a4
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 51b53b5c56a..a1b9da4fa9e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1546,6 +1546,11 @@ if test "x$with_mpfr_lib" != x; then
   gmplibs="-L$with_mpfr_lib $gmplibs"
 fi
 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
+  # MPFR v3.1.0 moved the sources into a src sub-directory.
+  if ! test -d ${srcdir}/mpfr/src; then
+    AC_MSG_ERROR([dnl
+Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
+  fi
   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
-- 
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