perf: Disable warnings as errors for kernels 3.1+

Turns out the sed command has not been working as intended since
kernel 3.1 due to the trailing space. Adding the WERROR=0 environment
variable is the correct way to disable warnings as errors.

(From OE-Core rev: 963315939610a89b031346ebf93cd5bddc7773d2)

Signed-off-by: Konrad Scherer <Konrad.Scherer@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/recipes-kernel/perf/perf.bb b/meta/recipes-kernel/perf/perf.bb
index 903ffa6eaf..6258cbbe09 100644
--- a/meta/recipes-kernel/perf/perf.bb
+++ b/meta/recipes-kernel/perf/perf.bb
@@ -41,6 +41,9 @@ export STAGING_LIBDIR
 export BUILD_SYS
 export HOST_SYS
 
+#kernel 3.1+ supports WERROR to disable warnings as errors
+export WERROR = "0"
+
 do_populate_lic[depends] += "virtual/kernel:do_populate_sysroot"
 
 # needed for building the tools/perf Perl binding
@@ -115,6 +118,7 @@ do_install() {
 }
 
 do_configure_prepend () {
+    #kernels before 3.1 do not support WERROR env variable
     sed -i 's,-Werror ,,' ${S}/tools/perf/Makefile
 }