Add CMake Variable TIMEMORY_BINUTILS_DOWNLOAD_URL

Used to override the default URL to download BINUTILS from.
Useful for internal builds.

Also add a mirrors to fallback to if the primary URL fails.

Signed-off-by: David Galiffi <David.Galiffi@amd.com>

cmake/Modules/ConfigBinutils.cmake

@@ -70,11 +70,22 @@ mark_as_advanced(binutils_CONFIG_FLAGS)
 # needed for configure command
 string(REPLACE " " ";" _binutils_CONFIG_FLAGS "${binutils_CONFIG_FLAGS}")
 
+# List of URLS (includes mirrors) to download binutils from.
+set(TIMEMORY_BINUTILS_DOWNLOAD_URL
+    ""
+    CACHE STRING "URLs for binutils download")
+
+# Add defualt URLs to download binutils from.
+list(APPEND TIMEMORY_BINUTILS_DOWNLOAD_URL
+    "http://ftpmirror.gnu.org/gnu/binutils/binutils-2.40.tar.gz"
+    "http://mirrors.kernel.org/sourceware/binutils/releases/binutils-2.40.tar.gz"
+    )
+
 include(ExternalProject)
 externalproject_add(
     binutils-external
     PREFIX ${PROJECT_BINARY_DIR}/external/binutils
-    URL http://ftpmirror.gnu.org/gnu/binutils/binutils-2.40.tar.gz
+    URL ${TIMEMORY_BINUTILS_DOWNLOAD_URL}
     BUILD_IN_SOURCE 1
     CONFIGURE_COMMAND
         ${CMAKE_COMMAND} -E env CC=${CMAKE_C_COMPILER} CFLAGS=-fPIC\ -O3