dockcross/imagefiles/patch/crosstool-ng/crosstool-ng-zlib-target.patch

--- a/scripts/build/companion_libs/050-zlib.sh
+++ b/scripts/build/companion_libs/050-zlib.sh
@@ -9,7 +9,7 @@ do_zlib_for_host() { :; }
 do_zlib_for_target() { :; }
 
 # Overide functions depending on configuration
-if [ "${CT_ZLIB}" = "y" ]; then
+if [ "${CT_ZLIB}" = "y" -o "${CT_ZLIB_TARGET}" = "y" ]; then
 
 # Download zlib
 do_zlib_get() {
@@ -21,6 +21,8 @@ do_zlib_extract() {
     CT_ExtractPatch ZLIB
 }
 
+if [ "${CT_ZLIB}" = "y" ]; then
+
 # Build zlib for running on build
 # - always build statically
 # - install in build-tools prefix
@@ -61,6 +63,38 @@ do_zlib_for_host() {
     CT_EndStep
 }
 
+fi # CT_ZLIB
+
+if [ "${CT_ZLIB_TARGET}" = "y" ]; then
+
+do_zlib_for_target() {
+    local -a zlib_opts
+    local prefix
+
+    CT_DoStep INFO "Installing zlib for the target"
+    CT_mkdir_pushd "${CT_BUILD_DIR}/build-zlib-target-${CT_TARGET}"
+
+    case "${CT_TARGET}" in
+        *-*-mingw*)
+            prefix="/mingw"
+            ;;
+        *)
+            prefix="/usr"
+            ;;
+    esac
+
+    zlib_opts+=( "host=${CT_TARGET}" )
+    zlib_opts+=( "prefix=${prefix}" )
+    zlib_opts+=( "destdir=${CT_SYSROOT_DIR}" )
+    zlib_opts+=( "cflags=${CT_ALL_TARGET_CFLAGS}" )
+    do_zlib_backend "${zlib_opts[@]}"
+
+    CT_Popd
+    CT_EndStep
+}
+
+fi # CT_ZLIB_TARGET
+
 # Build zlib
 #     Parameter     : description               : type      : default
 #     host          : machine to run on         : tuple     : (none)
@@ -72,6 +106,7 @@ do_zlib_backend() {
     local prefix
     local cflags
     local ldflags
+    local destdir
     local arg
     local -a extra_config
     local -a extra_make
@@ -126,7 +161,7 @@ do_zlib_backend() {
     fi
 
     CT_DoLog EXTRA "Installing zlib"
-    CT_DoExecLog ALL make "${extra_make[@]}" install
+    CT_DoExecLog ALL make "${extra_make[@]}" install DESTDIR="${destdir}"
 }
 
-fi # CT_ZLIB
+fi # CT_ZLIB || CT_ZLIB_TARGET