From 8600f3ce56f67a2a0d7b4a14eb9e8b1f0ec49dec Mon Sep 17 00:00:00 2001
From: Alexey Neyman <stilor@att.net>
Date: Sun, 12 Mar 2017 16:56:19 -0700
Subject: Move tools alias creation to a common function

... and in addition to final toolchain aliasing, use it when configuring
multilibs for glibc/musl. Note that uClibc does not need it, it is
explicitly selecting the tools using CROSS_PREFIX.

Signed-off-by: Alexey Neyman <stilor@att.net>

diff --git a/scripts/build/internals.sh b/scripts/build/internals.sh
index 95fb72b..7d91d78 100644
--- a/scripts/build/internals.sh
+++ b/scripts/build/internals.sh
@@ -103,25 +103,8 @@ do_finish() {
 
     # Create the aliases to the target tools
     CT_DoLog EXTRA "Creating toolchain aliases"
-    CT_Pushd "${CT_PREFIX_DIR}/bin"
-    for t in "${CT_TARGET}-"*; do
-        if [ -n "${CT_TARGET_ALIAS}" ]; then
-            _t=$(echo "$t" |sed -r -e 's/^'"${CT_TARGET}"'-/'"${CT_TARGET_ALIAS}"'-/;')
-            CT_DoExecLog ALL ln -sfv "${t}" "${_t}"
-        fi
-        if [ -n "${CT_TARGET_ALIAS_SED_EXPR}" ]; then
-            _t=$(echo "$t" |sed -r -e "${CT_TARGET_ALIAS_SED_EXPR}")
-            if [ "${_t}" = "${t}" ]; then
-                CT_DoLog WARN "The sed expression '${CT_TARGET_ALIAS_SED_EXPR}' has no effect on '${t}'"
-            else
-                CT_DoExecLog ALL ln -sfv "${t}" "${_t}"
-            fi
-        fi
-    done
-    CT_Popd
-
-    CT_DoLog EXTRA "Removing access to the build system tools"
-    CT_DoExecLog DEBUG rm -rf "${CT_PREFIX_DIR}/buildtools"
+    CT_SymlinkTools "${CT_PREFIX_DIR}/bin" "${CT_PREFIX_DIR}/bin" \
+            "${CT_TARGET_ALIAS}" "${CT_TARGET_ALIAS_SED_EXPR}"
 
     # Remove the generated documentation files
     if [ "${CT_REMOVE_DOCS}" = "y" ]; then
diff --git a/scripts/build/libc/glibc.sh b/scripts/build/libc/glibc.sh
index 569183a..a630633 100644
--- a/scripts/build/libc/glibc.sh
+++ b/scripts/build/libc/glibc.sh
@@ -297,6 +297,8 @@ do_libc_backend_once() {
     # or even after they get installed...
     echo "ac_cv_path_BASH_SHELL=/bin/bash" >>config.cache
 
+    CT_SymlinkToolsMultilib
+
     # Configure with --prefix the way we want it on the target...
     # There are a whole lot of settings here.  You'll probably want
     # to read up on what they all mean, and customize a bit, possibly
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index 4ccb84c..3d6fe04 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -102,6 +102,8 @@ do_libc_backend_once() {
         extra_config+=( "--includedir=/usr/include/${hdr_install_subdir}" )
     fi
 
+    CT_SymlinkToolsMultilib
+
     # NOTE: musl handles the build/host/target a little bit differently
     # then one would expect:
     #   build   : not used
diff --git a/scripts/functions b/scripts/functions
index 969e9bf..8b12d8e 100644
--- a/scripts/functions
+++ b/scripts/functions
@@ -1762,3 +1762,56 @@ CT_IterateMultilibs() {
         multi_index=$((multi_index+1))
     done
 }
+
+# Create symbolic links in buildtools for binutils using a different
+# target name.
+# Usage:
+#   CT_SymlinkTools BIN-DIR SRC-DIR NEW-PREFIX SED-EXPR
+CT_SymlinkTools()
+{
+    local bindir="$1"
+    local srcdir="$2"
+    local newpfx="$3"
+    local sedexpr="$4"
+    local dirpfx
+    local t _t
+
+    # if bindir==srcdir, create symlinks just with the filename
+    if [ "${bindir}" != "${srcdir}" ]; then
+        dirpfx="${srcdir}/"
+    fi
+
+    CT_Pushd "${srcdir}"
+    for t in "${CT_TARGET}-"*; do
+        if [ -n "${newpfx}" -a "${newpfx}" != "${CT_TARGET}" ]; then
+            _t="${newpfx}-${t#${CT_TARGET}-}"
+            CT_DoExecLog ALL ln -sfv "${dirpfx}${t}" "${bindir}/${_t}"
+        fi
+        if [ -n "${sedexpr}" ]; then
+            _t=$( echo "${t}" | sed -r -e "${sedexpr}" )
+            if [ "${_t}" = "${t}" ]; then
+                CT_DoLog WARN "The sed expression '${sedexpr}' has no effect on '${t}'"
+            else
+                CT_DoExecLog ALL ln -sfv "${dirpfx}${t}" "${bindir}/${_t}"
+            fi
+        fi
+    done
+    CT_Popd
+}
+
+# Create symbolic links for multilib iterator. Expects ${multi_target}
+# variable to indicate the desired triplet for the tools.
+CT_SymlinkToolsMultilib()
+{
+    # Make configure detect ${target}-tool binaries even if it is different
+    # from configured tuple. Only symlink to final tools if they're executable
+    # on build.
+    CT_SymlinkTools "${CT_BUILDTOOLS_PREFIX_DIR}/bin" \
+        "${CT_BUILDTOOLS_PREFIX_DIR}/bin" "${multi_target}"
+    case "${CT_TOOLCHAIN_TYPE}" in
+        native|cross)
+            CT_SymlinkTools "${CT_BUILDTOOLS_PREFIX_DIR}/bin" \
+                "${CT_PREFIX_DIR}/bin" "${multi_target}"
+            ;;
+    esac
+}
-- 
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