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cc/gcc: disable complibs if not selected

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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>
This commit is contained in:
Yann E. MORIN" 2010-09-12 23:51:25 +02:00
parent d34a5ec7d8
commit 9176074aec
1 changed files with 10 additions and 0 deletions
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10
scripts/build/cc/gcc.sh
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@ -175,9 +175,14 @@ do_cc_core() {
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 @@ do_cc() {
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