# HG changeset patch
# User "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
# Date 1284328285 -7200
# Node ID ff2181adbd28c91a21fa5f230bf92aaa7824dc73
# Parent  eb837be50f8f0a508206154381f036f49927c202
cc/gcc: disable complibs if not selected

Force gcc to not link with some companion libraries when
there are not needed (because selected-out).

There is no option to tell gcc *not* to build the Graphite and/or
LTO stuff. They *will* be built if gcc finds the suitable companion
libraries. If we do not provide them, but the host has them, then
gcc *will* find them, and link with them.

Consider the following:
- host has suitable PPL and CLooG (eg. Debian Squeeze)
- user wants to build gcc>=4.4
- user de-selects GRAPHITE
- gcc will find the hosts PPL and CLooG, and will use them
- the user moves the toolchain to an older host that does
  not have them (eg. Debian Lenny)
- the toolchain fails, when it was properly setup not to

So, explicitly tell gcc *not* to use unneeded companion libs.

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

diff -r eb837be50f8f -r ff2181adbd28 scripts/build/cc/gcc.sh
--- a/scripts/build/cc/gcc.sh	Sun Sep 12 20:54:54 2010 +0200
+++ b/scripts/build/cc/gcc.sh	Sun Sep 12 23:51:25 2010 +0200
@@ -175,9 +175,14 @@
     if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
         extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
+    elif [ "${CT_CC_GCC_HAS_GRAPHITE}" = "y" ]; then
+        extra_config+=("--with-ppl=no")
+        extra_config+=("--with-cloog=no")
     fi
     if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
         extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
+    elif [ "${CT_CC_GCC_HAS_LTO}" = "y" ]; then
+        extra_config+=("--with-libelf=no")
     fi
 
     if [ "${CT_CC_GCC_ENABLE_TARGET_OPTSPACE}" = "y" ]; then
@@ -373,9 +378,14 @@
     if [ "${CT_CC_GCC_USE_GRAPHITE}" = "y" ]; then
         extra_config+=("--with-ppl=${CT_COMPLIBS_DIR}")
         extra_config+=("--with-cloog=${CT_COMPLIBS_DIR}")
+    elif [ "${CT_CC_GCC_HAS_GRAPHITE}" = "y" ]; then
+        extra_config+=("--with-ppl=no")
+        extra_config+=("--with-cloog=no")
     fi
     if [ "${CT_CC_GCC_USE_LTO}" = "y" ]; then
         extra_config+=("--with-libelf=${CT_COMPLIBS_DIR}")
+    elif [ "${CT_CC_GCC_HAS_LTO}" = "y" ]; then
+        extra_config+=("--with-libelf=no")
     fi
 
     if [ "${CT_THREADS}" = "none" ]; then