Make gcc-4.3.x able to compile uClibc (snapshot only).

Update the gcc patchset accordingly.

 /trunk/scripts/build/cc_gcc.sh |   55    53     2     0 ++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 2 deletions(-)

1 files changed, 53 insertions, 2 deletions

diff --git a/scripts/build/cc_gcc.sh b/scripts/build/cc_gcc.sh
index 742b804..7a70d0d 100644
--- a/scripts/build/cc_gcc.sh
+++ b/scripts/build/cc_gcc.sh
@@ -90,16 +90,67 @@ do_cc_core_static() {
         --enable-target-optspace                    \
         ${CT_CC_CORE_EXTRA_CONFIG}
 
+    # HACK: we need to override SHLIB_LC from gcc/config/t-slibgcc-elf-ver or
+    # gcc/config/t-libunwind so -lc is removed from the link for
+    # libgcc_s.so, as we do not have a target -lc yet.
+    # This is not as ugly as it appears to be ;-) All symbols get resolved
+    # during the glibc build, and we provide a proper libgcc_s.so for the
+    # cross toolchain during the final gcc build.
+    #
+    # As we cannot modify the source tree, nor override SHLIB_LC itself
+    # during configure or make, we have to edit the resultant
+    # gcc/libgcc.mk itself to remove -lc from the link.
+    # This causes us to have to jump through some hoops...
+    #
+    # To produce libgcc.mk to edit we firstly require libiberty.a,
+    # so we configure then build it.
+    # Next we have to configure gcc, create libgcc.mk then edit it...
+    # So much easier if we just edit the source tree, but hey...
+    if [ ! -f "${CT_SRC_DIR}/${CT_CC_FILE}/gcc/BASE-VER" ]; then
+        CT_DoExecLog ALL make configure-libiberty
+        CT_DoExecLog ALL make ${PARALLELMFLAGS} -C libiberty libiberty.a
+        CT_DoExecLog ALL make configure-gcc configure-libcpp
+        CT_DoExecLog ALL make ${PARALLELMFLAGS} all-libcpp
+    else
+        CT_DoExecLog ALL make configure-gcc configure-libcpp configure-build-libiberty
+        CT_DoExecLog ALL make ${PARALLELMFLAGS} all-libcpp all-build-libiberty
+    fi
+    # HACK: gcc-4.2 uses libdecnumber to build libgcc.mk, so build it here.
+    if [ -d "${CT_SRC_DIR}/${CT_CC_FILE}/libdecnumber" ]; then
+        CT_DoExecLog ALL make configure-libdecnumber
+        CT_DoExecLog ALL make ${PARALLELMFLAGS} -C libdecnumber libdecnumber.a
+    fi
+
+    # Starting with GCC 4.3, libgcc.mk is no longer built,
+    # and libgcc.mvars is used instead.
+
+    gcc_version_major=$(echo ${CT_CC_VERSION} |sed -r -e 's/^([^\.]+)\..*/\1/')
+    gcc_version_minor=$(echo ${CT_CC_VERSION} |sed -r -e 's/^[^\.]+\.([^.]+).*/\1/')
+
+    if [    ${gcc_version_major} -eq 4 -a ${gcc_version_minor} -ge 3    \
+         -o ${gcc_version_major} -gt 4                                  ]; then
+        libgcc_rule="libgcc.mvars"
+        build_rules="all-gcc all-target-libgcc"
+        install_rules="install-gcc install-target-libgcc"
+    else
+        libgcc_rule="libgcc.mk"
+        build_rules="all-gcc"
+        install_rules="install-gcc"
+    fi
+
+    CT_DoExecLog ALL make ${PARALLELMFLAGS} -C gcc ${libgcc_rule}
+    sed -r -i -e 's@-lc@@g' gcc/${libgcc_rule}
+
     if [ "${CT_CANADIAN}" = "y" ]; then
         CT_DoLog EXTRA "Building libiberty"
         CT_DoExecLog ALL make ${PARALLELMFLAGS} all-build-libiberty
     fi
 
     CT_DoLog EXTRA "Building static core C compiler"
-    CT_DoExecLog ALL make ${PARALLELMFLAGS} all-gcc
+    CT_DoExecLog ALL make ${PARALLELMFLAGS} ${build_rules}
 
     CT_DoLog EXTRA "Installing static core C compiler"
-    CT_DoExecLog ALL make install-gcc
+    CT_DoExecLog ALL make ${install_rules}
 
     CT_EndStep
 }