From 416eb291985c1e04cddd1dacc6d3111f4cb02f5f Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN\"" <yann.morin.1998@anciens.enib.fr>
Date: Sat, 9 Oct 2010 22:49:28 +0200
Subject: cc/gcc: add option to enable 128-bit long doubles

Needed by some PPC targets, at least.
Requires gcc 4.2+ (noticed by Arnaud LACOMBE).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

diff --git a/config/cc/gcc.in.2 b/config/cc/gcc.in.2
index 1b4926b..c0434a7 100644
--- a/config/cc/gcc.in.2
+++ b/config/cc/gcc.in.2
@@ -105,3 +105,16 @@ config CC_GCC_LIBMUDFLAP
       re-compilation and re-link, while it exists better run-time
       alternatives (eg. DUMA, dmalloc...) that need neither re-
       compilation nor re-link.
+
+config CC_GCC_LDBL_128
+    tristate
+    prompt "Enable 128-bit long doubles"
+    default m
+    depends on CC_GCC_4_2_or_later
+    help
+      Saying 'Y' will force gcc to use 128-bit wide long doubles
+      Saying 'N' will force gcc to use 64-bit wide long doubles
+      Saying 'M' will let gcc choose (default is 128-bit for
+                 glibc >= 2.4, 64-bit otherwise)
+      
+      If in doubt, keep the default, ie. 'M'.
diff --git a/scripts/build/cc/gcc.sh b/scripts/build/cc/gcc.sh
index a30a3d4..4e6a377 100644
--- a/scripts/build/cc/gcc.sh
+++ b/scripts/build/cc/gcc.sh
@@ -191,6 +191,12 @@ do_cc_core() {
         extra_config+=("--enable-target-optspace")
     fi
 
+    case "${CT_CC_GCC_LDBL_128}" in
+        Y)  extra_config+=("--with-long-double-128");;
+        M)  ;;
+        "") extra_config+=("--without-long-double-128");;
+    esac
+
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
     # Use --with-local-prefix so older gccs don't look in /usr/local (http://gcc.gnu.org/PR10532)
@@ -420,6 +426,12 @@ do_cc() {
         extra_config+=("--disable-libstdcxx-pch")
     fi
 
+    case "${CT_CC_GCC_LDBL_128}" in
+        Y)  extra_config+=("--with-long-double-128");;
+        M)  ;;
+        "") extra_config+=("--without-long-double-128");;
+    esac
+
     CT_DoLog DEBUG "Extra config passed: '${extra_config[*]}'"
 
     # --enable-symvers=gnu really only needed for sh4 to work around a
-- 
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