The build on Ubuntu Xenial with GCC 5.4.0 will fail with:
cc: error: unrecognized command line option ‘-Wimplicit-fallthrough’
This unsupported flag is not skipped as expected.
It is because of the /bin/sh shell on Ubuntu, DASH, which does not
support this &> redirection. Use 2>&1 to solve this problem.
Signed-off-by: Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>
---
Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index e0a3938..ec23ed6 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@
#
##############################################################################
-cc-option = $(shell if $(CC) $(1) -c -x c /dev/null -o /dev/null &>/dev/null; \
+cc-option = $(shell if $(CC) $(1) -c -x c /dev/null -o /dev/null > /dev/null 2>&1; \
then echo $(1); fi)
CFLAGS ?= -O2 -Wall -Wundef \
--
2.17.1
|