[coreboot-gerrit] New patch to review for coreboot: cpu: create an empty file when no microcode files are given

[Alexander Couzens (lynxis@fe80.eu)]

Alexander Couzens (lynxis at fe80.eu) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/12109

-gerrit

commit 7dbf42b068a8dce202096c30897fbaa298810f5f
Author: Alexander Couzens <lynxis at fe80.eu>
Date:   Wed Oct 21 12:02:39 2015 +0200

    cpu: create an empty file when no microcode files are given
    
    Having an empty microcode file makes it more easy to debug
    in difference to an not existing file in cbfs. There are some
    platforms (e.g. ep80579) which supports 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 at fe80.eu>
---
 src/cpu/Makefile.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cpu/Makefile.inc b/src/cpu/Makefile.inc
index d939061..52b58f7 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)