cc/gcc: do not force use of non-vital companion libraries

While GMP and MPFR are required by gcc>=4.3 (to build the frontends),
and MPC is required by gcc>=4.5, the other libs are not. If they are
present then gcc will enable advanced features; if they are missing,
then gcc will (should) simply disable those features.

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

1 files changed, 27 insertions, 0 deletions

diff --git a/config/cc/gcc.in.2 b/config/cc/gcc.in.2
index 95d7037..1b4926b 100644
--- a/config/cc/gcc.in.2
+++ b/config/cc/gcc.in.2
@@ -7,6 +7,33 @@ config CC_GCC_ENABLE_TARGET_OPTSPACE
       
       This will compile crossgcc's libs with -Os.
 
+config CC_GCC_USE_GRAPHITE
+    bool
+    prompt "Enable GRAPHITE loop optimisations"
+    default y
+    depends on CC_GCC_HAS_GRAPHITE
+    select CC_GCC_USE_PPL_CLOOG
+    help
+      Enable the GRAPHITE loop optimsations.
+      
+      This requires the PPL and CLooG companion libraries, and
+      those will be automatically build for you.
+      
+      On some systems (eg. Cygwin), PPL and/or CLooG may not
+      build properly (yet), so you'll have to say 'N' here.
+
+config CC_GCC_USE_LTO
+    bool
+    prompt "Enable LTO"
+    default y
+    depends on CC_GCC_HAS_LTO
+    select CC_GCC_USE_LIBELF
+    help
+      Enable the Link Time Optimisations.
+      
+      This will require the libelf companion library, and it
+      wil be build automatically for you.
+
 config CC_STATIC_LIBSTDCXX
     bool
     prompt "Link libstdc++ statically into the gcc binary"