gcc: Remove gcc <= 4.7.x

As per #222, in crosstool-NG >= 1.23.0, we will only support:

 [upstream supported gcc versions] - 1

As of this writing, these versions are:

* 5.2.0
* 4.9.3
* 4.8.5 (the -1, since development on 4.8.x is now closed)

I plan to keep 4.8.5 around because of some architectures having issues
with over-optimization or just faulty optimization in the 4.9.x and
possibly newer versions.

I also cleaned up a requirement for glibc to depend on >= gcc-4.6.x for
>= glibc-2.20, but since the lowest gcc we support after this change is
>= 4.8.5, this condition can go away.

Patches for older gcc versions are removed in the next commit.

This closes #222

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

1 files changed, 6 insertions, 21 deletions

diff --git a/scripts/build/cc/100-gcc.sh b/scripts/build/cc/100-gcc.sh
index 6ed9e9cd..ea7d2224 100644
--- a/scripts/build/cc/100-gcc.sh
+++ b/scripts/build/cc/100-gcc.sh
@@ -148,9 +148,7 @@ do_gcc_core_pass_2() {
             ;;
         *)
             core_opts+=( "mode=static" )
-            if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
-                core_opts+=( "build_libgcc=yes" )
-            fi
+	    core_opts+=( "build_libgcc=yes" )
             ;;
     esac
 
@@ -486,16 +484,8 @@ do_gcc_core_backend() {
             CT_DoExecLog ALL ${make} ${JOBSFLAGS} -C libbacktrace
         fi
 
-        # Starting with GCC 4.3, libgcc.mk is no longer built,
-        # and libgcc.mvars is used instead.
-
-        if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
-            libgcc_rule="libgcc.mvars"
-            core_targets=( gcc target-libgcc )
-        else
-            libgcc_rule="libgcc.mk"
-            core_targets=( gcc )
-        fi
+	libgcc_rule="libgcc.mvars"
+	core_targets=( gcc target-libgcc )
 
         # On bare metal and canadian build the host-compiler is used when
         # actually the build-system compiler is required. Choose the correct
@@ -731,10 +721,8 @@ do_gcc_backend() {
     if [ -n "${CT_CC_GCC_ENABLE_CXX_FLAGS}" ]; then
         extra_config+=("--enable-cxx-flags=${CT_CC_GCC_ENABLE_CXX_FLAGS}")
     fi
-    if [ "${CT_CC_GCC_4_8_or_later}" = "y" ]; then
-        if [ "${CT_THREADS}" = "none" ]; then
-            extra_config+=(--disable-libatomic)
-        fi
+    if [ "${CT_THREADS}" = "none" ]; then
+	extra_config+=(--disable-libatomic)
     fi
     if [ "${CT_CC_GCC_LIBMUDFLAP}" = "y" ]; then
         extra_config+=(--enable-libmudflap)
@@ -842,10 +830,7 @@ do_gcc_backend() {
 
     if [ "${CT_THREADS}" = "none" ]; then
         extra_config+=("--disable-threads")
-        if [ "${CT_CC_GCC_4_2_or_later}" = y ]; then
-            CT_Test "Disabling libgomp for no-thread gcc>=4.2" "${CT_CC_GCC_LIBGOMP}" = "Y"
-            extra_config+=("--disable-libgomp")
-        fi
+	extra_config+=("--disable-libgomp")
     else
         if [ "${CT_THREADS}" = "win32" ]; then
             extra_config+=("--enable-threads=win32")