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authorAlexander Couzens <lynxis@fe80.eu>2015-10-21 12:02:39 +0200
committerNico Huber <nico.h@gmx.de>2015-10-27 11:12:02 +0100
commitd1adafec0507109629fa4d1005e510a3234e04fb (patch)
tree718c8fd50df3d6d5550015f98b3d1f1e2a14bcf3
parentc19f876e94d3fc52d367d98352523bb52d07b753 (diff)
cpu: create an empty file when no microcode files are given
Having an empty microcode file makes it more easy to debug in comparison to a not existing file in cbfs. There are some platforms (e.g. ep80579) which support microcode updates but not having any microcode updates yet in our tree. These platform hang the build because `cat` is called with no parameters. Change-Id: I2699bde0c62ae62ca888686f8b496e845c36d970 Signed-off-by: Alexander Couzens <lynxis@fe80.eu> Reviewed-on: http://review.coreboot.org/12109 Tested-by: build bot (Jenkins) Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
-rw-r--r--src/cpu/Makefile.inc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/cpu/Makefile.inc b/src/cpu/Makefile.inc
index d9390610c6..52b58f7ecb 100644
--- a/src/cpu/Makefile.inc
+++ b/src/cpu/Makefile.inc
@@ -40,7 +40,7 @@ endif
$(obj)/cpu_microcode_blob.bin: $$(cpu_microcode_bins)
@printf " MICROCODE $(subst $(obj)/,,$(@))\n"
@echo $(cpu_microcode_bins)
- cat $+ > $@
+ cat /dev/null $+ > $@
cbfs-files-$(cbfs_include_ucode) += cpu_microcode_blob.bin
cpu_microcode_blob.bin-file := $(cpu_ucode_cbfs_file)