cc/gcc: pass the install prefix to the core passes

Currently, the discrimination on the core compilers prefixes depends on
the type of core compiler to build.

This is not correct, and the caller of the core backend should specify
the prefix.

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

scripts/build/cc/gcc.sh

@@ -68,6 +68,7 @@ do_cc_core_pass_1() {
             do_core=y
             core_opts+=( "mode=static" )
             core_opts+=( "complibs=${CT_COMPLIBS_DIR}" )
+            core_opts+=( "prefix=${CT_CC_CORE_STATIC_PREFIX_DIR}" )
             ;;
         ,y,*)
             ;;
@@ -75,6 +76,7 @@ do_cc_core_pass_1() {
             do_core=y
             core_opts+=( "mode=static" )
             core_opts+=( "complibs=${CT_COMPLIBS_DIR}" )
+            core_opts+=( "prefix=${CT_CC_CORE_STATIC_PREFIX_DIR}" )
             ;;
         *)
             ;;
@@ -103,6 +105,7 @@ do_cc_core_pass_2() {
             core_opts+=( "build_libgcc=yes" )
             core_opts+=( "build_libstdcxx=yes" )
             core_opts+=( "complibs=${CT_COMPLIBS_DIR}" )
+            core_opts+=( "prefix=${CT_PREFIX_DIR}" )
             if [ "${CT_STATIC_TOOLCHAIN}" = "y" ]; then
                 core_opts+=( "build_staticlinked=yes" )
             fi
@@ -114,17 +117,20 @@ do_cc_core_pass_2() {
             core_opts+=( "mode=shared" )
             core_opts+=( "build_libgcc=yes" )
             core_opts+=( "complibs=${CT_COMPLIBS_DIR}" )
+            core_opts+=( "prefix=${CT_CC_CORE_SHARED_PREFIX_DIR}" )
             ;;
         ,,win32)
             do_core=y
             core_opts+=( "mode=static" )
             core_opts+=( "build_libgcc=yes" )
             core_opts+=( "complibs=${CT_COMPLIBS_DIR}" )
+            core_opts+=( "prefix=${CT_CC_CORE_STATIC_PREFIX_DIR}" )
             ;;
         *)
             do_core=y
             core_opts+=( "mode=static" )
             core_opts+=( "complibs=${CT_COMPLIBS_DIR}" )
+            core_opts+=( "prefix=${CT_CC_CORE_STATIC_PREFIX_DIR}" )
             if [ "${CT_CC_GCC_4_3_or_later}" = "y" ]; then
                 core_opts+=( "build_libgcc=yes" )
             fi
@@ -145,6 +151,7 @@ do_cc_core_pass_2() {
 #  - we need to build libstdc++ or not          : build_libstdcxx=[yes|no]    (default: no)
 #  - we need to build statically linked or not  : build_staticlinked=[yes|no] (default: no)
 #  - where to find the companion libs (prefix)  : complibs=<prefix_dir>       (no default value)
+#  - the prefix to install into (directory)     : prefix=<directory>          (no default value)
 # Usage: do_cc_core_backend mode=[static|shared|baremetal] build_libgcc=[yes|no] build_staticlinked=[yes|no]
 do_cc_core_backend() {
     local mode
@@ -152,7 +159,7 @@ do_cc_core_backend() {
     local build_libstdcxx=no
     local build_staticlinked=no
     local build_manuals=no
-    local core_prefix_dir
+    local prefix
     local complibs
     local lang_opt
     local tmp
@@ -169,7 +176,6 @@ do_cc_core_backend() {
     lang_opt=c
     case "${mode}" in
         static)
-            core_prefix_dir="${CT_CC_CORE_STATIC_PREFIX_DIR}"
             extra_config+=("--with-newlib")
             extra_config+=("--enable-threads=no")
             extra_config+=("--disable-shared")
@@ -177,12 +183,10 @@ do_cc_core_backend() {
                             # we copy an empty directory. So, who cares?
             ;;
         shared)
-            core_prefix_dir="${CT_CC_CORE_SHARED_PREFIX_DIR}"
             extra_config+=("--enable-shared")
             copy_headers=y
             ;;
         baremetal)
-            core_prefix_dir="${CT_PREFIX_DIR}"
             extra_config+=("--with-newlib")
             extra_config+=("--enable-threads=no")
             extra_config+=("--disable-shared")
@@ -206,7 +210,7 @@ do_cc_core_backend() {
 
     if [ "${copy_headers}" = "y" ]; then
         CT_DoLog DEBUG "Copying headers to install area of bootstrap gcc, so it can build libgcc2"
-        CT_DoExecLog ALL cp -a "${CT_HEADERS_DIR}" "${core_prefix_dir}/${CT_TARGET}/include"
+        CT_DoExecLog ALL cp -a "${CT_HEADERS_DIR}" "${prefix}/${CT_TARGET}/include"
     fi
 
     CT_DoLog EXTRA "Configuring ${mode} core C compiler"
@@ -352,7 +356,7 @@ do_cc_core_backend() {
         --build=${CT_BUILD}                         \
         --host=${CT_HOST}                           \
         --target=${CT_TARGET}                       \
-        --prefix="${core_prefix_dir}"               \
+        --prefix="${prefix}"                        \
         --with-local-prefix="${CT_SYSROOT_DIR}"     \
         --disable-libmudflap                        \
         ${CC_CORE_SYSROOT_ARG}                      \
@@ -442,9 +446,9 @@ do_cc_core_backend() {
     # Create a symlink ${CT_TARGET}-cc to ${CT_TARGET}-gcc to always be able
     # to call the C compiler with the same, somewhat canonical name.
     # check whether compiler has an extension
-    file="$( ls -1 "${core_prefix_dir}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
+    file="$( ls -1 "${prefix}/bin/${CT_TARGET}-gcc."* 2>/dev/null || true )"
     [ -z "${file}" ] || ext=".${file##*.}"
-    CT_DoExecLog ALL ln -sfv "${CT_TARGET}-gcc${ext}" "${core_prefix_dir}/bin/${CT_TARGET}-cc${ext}"
+    CT_DoExecLog ALL ln -sfv "${CT_TARGET}-gcc${ext}" "${prefix}/bin/${CT_TARGET}-cc${ext}"
 
     if [ "${CT_MULTILIB}" = "y" ]; then
         multilibs=( $( "${core_prefix_dir}/bin/${CT_TARGET}-gcc" -print-multi-lib   \