Makefile: Use ld.bfd linker if available

Some toolchain distributions install both the BFD and GOLD linkers under
the names <target>-ld.bfd and <target>-ld.gold. <target>-ld will then be
a symlink that may point to either one of these.

Trusted Firmware should always be linked with the BFD linker, since GOLD
is meant primarily for userspace programs and doesn't support many of
the more obscure linker script features that may be needed for firmware.
With this patch the Makefile will auto-detect if ld.bfd is available and
use it explicitly in that case.

Change-Id: I7017055f67db3bd57d191d20a7af06ca646937d7
Signed-off-by: Julius Werner <[email protected]>

diff --git a/Makefile b/Makefile
index c0fddcf64eeed194527745b68a7bae12f63c9613..60d99bf708746c472b8dc2b3a9cdc23f7e91abd3 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -126,6 +126,12 @@ OD                 :=      ${CROSS_COMPILE}objdump
 NM                     :=      ${CROSS_COMPILE}nm
 PP                     :=      ${CROSS_COMPILE}gcc -E
 
+# Use ${LD}.bfd instead if it exists (as absolute path or together with $PATH).
+ifneq ($(strip $(wildcard ${LD}.bfd) \
+       $(foreach dir,$(subst :, ,${PATH}),$(wildcard ${dir}/${LD}.bfd))),)
+LD                     :=      ${LD}.bfd
+endif
+
 ifeq (${ARM_ARCH_MAJOR},7)
 target32-directive     =       -target arm-none-eabi
 # Will set march32-directive from platform configuration