Add support code for the canadian-cross case.

Add implementation for a candadian build option already
present in crosstool in order to build a cross-compiler
where build != host != target

Signed-off-by: Bart van der Meulen <bartvdrmeulen@gmail.com>

config/toolchain.in

@@ -123,7 +123,7 @@ config CROSS_NATIVE
 
 config CANADIAN
     bool
-    prompt "Canadian     (NO CODE!) (EXPERIMENTAL)"
+    prompt "Canadian     (EXPERIMENTAL)"
     depends on EXPERIMENTAL
     help
       Build a canadian-toolchain.

scripts/build/cc/gcc.sh

@@ -41,6 +41,10 @@ do_cc_extract() {
 #------------------------------------------------------------------------------
 # Core gcc pass 1
 do_cc_core_pass_1() {
+    # If we're building a canadian compiler no use to build the CC
+    # core compiler, we're not using it
+    [ -n "${CT_CANADIAN}" ] && return 0
+
     # If we're building for bare metal, build the static core gcc,
     # with libgcc.
     # In case we're not bare metal, and we're NPTL, build the static core gcc.
@@ -54,6 +58,10 @@ do_cc_core_pass_1() {
 
 # Core gcc pass 2
 do_cc_core_pass_2() {
+    # If we're building a canadian compiler no use to build the CC
+    # core compiler, we're not using it
+    [ -n "${CT_CANADIAN}" ] && return 0
+
     # In case we're building for bare metal, do nothing, we already have
     # our compiler.
     # In case we're NPTL, build the shared core gcc and the target libgcc.

scripts/crosstool-NG.sh.in

@@ -223,8 +223,10 @@ CT_DoExecLog ALL mkdir -p "${CT_BUILD_DIR}"
 CT_DoExecLog ALL mkdir -p "${CT_CONFIG_DIR}"
 CT_DoExecLog ALL mkdir -p "${CT_INSTALL_DIR}"
 CT_DoExecLog ALL mkdir -p "${CT_PREFIX_DIR}"
-CT_DoExecLog ALL mkdir -p "${CT_CC_CORE_STATIC_PREFIX_DIR}"
+if [ -z "${CT_CANADIAN}" ]; then
-CT_DoExecLog ALL mkdir -p "${CT_CC_CORE_SHARED_PREFIX_DIR}"
+    CT_DoExecLog ALL mkdir -p "${CT_CC_CORE_STATIC_PREFIX_DIR}"
+    CT_DoExecLog ALL mkdir -p "${CT_CC_CORE_SHARED_PREFIX_DIR}"
+fi
 
 # Only create the state dir if asked for a restartable build
 [ -n "${CT_DEBUG_CT_SAVE_STEPS}" ] && CT_DoExecLog ALL mkdir -p "${CT_STATE_DIR}"
@@ -319,10 +321,17 @@ if [ -z "${CT_RESTART}" ]; then
 
     # Prepare mangling patterns to later modify BUILD and HOST (see below)
     case "${CT_TOOLCHAIN_TYPE}" in
+        canadian)
+            CT_REAL_TARGET="${CT_TARGET}"
+            build_mangle="build_"
+            host_mangle="host_"
+            install_build_tools_for="BUILD HOST TARGET"
+            ;;
         cross)
             CT_HOST="${CT_BUILD}"
             build_mangle="build_"
             host_mangle="build_"
+            install_build_tools_for="BUILD HOST"
             ;;
         *)  CT_Abort "No code for '${CT_TOOLCHAIN_TYPE}' toolchain type!"
             ;;
@@ -350,7 +359,7 @@ if [ -z "${CT_RESTART}" ]; then
     # cross-tools for those mangled tuples.
     CT_DoLog DEBUG "Making build system tools available"
     CT_DoExecLog ALL mkdir -p "${CT_PREFIX_DIR}/buildtools"
-    for m in BUILD HOST; do
+    for m in ${install_build_tools_for}; do
         r="CT_REAL_${m}"
         v="CT_${m}"
         p="CT_${m}_PREFIX"
@@ -418,6 +427,7 @@ if [ -z "${CT_RESTART}" ]; then
     # so don't add those PATHs in this case...
     case "${CT_TOOLCHAIN_TYPE}" in
         cross)  export PATH="${CT_PREFIX_DIR}/buildtools:${CT_PREFIX_DIR}/bin:${CT_CC_CORE_SHARED_PREFIX_DIR}/bin:${CT_CC_CORE_STATIC_PREFIX_DIR}/bin:${PATH}";;
+        canadian) export PATH="${CT_PREFIX_DIR}/buildtools:${PATH}";;
         *)  ;;
     esac