[PATCH 2/2] perf: Normalize gcc parameter when generating arch errno table

[zhe.he]

From: He Zhe <zhe.he@xxxxxxxxxxxxx>

The $(CC) passed to arch_errno_names.sh may include a series of parameters
along with gcc itself. To avoid overwriting the following parameters of
arch_errno_names.sh and break the build like below, we just pick up the
first word of the $(CC).

find: unknown predicate `-m64/arch'
x86_64-wrs-linux-gcc: warning: '-x c' after last input file has no effect
x86_64-wrs-linux-gcc: error: unrecognized command line option '-m64/include/uapi/asm-generic/errno.h'
x86_64-wrs-linux-gcc: fatal error: no input files

Signed-off-by: He Zhe <zhe.he@xxxxxxxxxxxxx>
---
 tools/perf/Makefile.perf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 3eda9d4..7114c11 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -573,7 +573,7 @@ arch_errno_hdr_dir := $(srctree)/tools
 arch_errno_tbl := $(srctree)/tools/perf/trace/beauty/arch_errno_names.sh
 
 $(arch_errno_name_array): $(arch_errno_tbl)
-	$(Q)$(SHELL) '$(arch_errno_tbl)' $(CC) $(arch_errno_hdr_dir) > $@
+	$(Q)$(SHELL) '$(arch_errno_tbl)' $(firstword $(CC)) $(arch_errno_hdr_dir) > $@
 
 sync_file_range_arrays := $(beauty_outdir)/sync_file_range_arrays.c
 sync_file_range_tbls := $(srctree)/tools/perf/trace/beauty/sync_file_range.sh
-- 
2.7.4