perf: Add LDFLAGS to allow build of old kernels without patching

The LDFLAGS is required or some old kernels fails due missing
symbols and this is preferred than requiring patches to every old
supported kernel.

Fixes [YOCTO: #5221]

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-kernel/perf/perf.bb b/meta/recipes-kernel/perf/perf.bb
index 4a815ff2f82fac105561d3367b12465e1e13d3ae..269069f3af29725d5f476931349b7977cf90d439 100644 (file)
--- a/meta/recipes-kernel/perf/perf.bb
+++ b/meta/recipes-kernel/perf/perf.bb
@@ -60,6 +60,11 @@ B = "${WORKDIR}/${BPN}-${PV}"
 SCRIPTING_DEFINES = "${@perf_feature_enabled('perf-scripting', '', 'NO_LIBPERL=1 NO_LIBPYTHON=1',d)}"
 TUI_DEFINES = "${@perf_feature_enabled('perf-tui', '', 'NO_NEWT=1',d)}"
 
+# The LDFLAGS is required or some old kernels fails due missing
+# symbols and this is preferred than requiring patches to every old
+# supported kernel.
+LDFLAGS="-ldl -lutil"
+
 EXTRA_OEMAKE = \
                '-C ${S}/tools/perf \
                O=${B} \
@@ -88,13 +93,13 @@ PARALLEL_MAKE = ""
 
 do_compile() {
        # Linux kernel build system is expected to do the right thing
-       unset CFLAGS LDFLAGS
+       unset CFLAGS
        oe_runmake all
 }
 
 do_install() {
        # Linux kernel build system is expected to do the right thing
-       unset CFLAGS LDFLAGS
+       unset CFLAGS
        oe_runmake DESTDIR=${D} install
        # we are checking for this make target to be compatible with older perf versions
        if [ "${@perf_feature_enabled('perf-scripting', 1, 0, d)}" = "1" -a $(grep install-python_ext ${S}/tools/perf/Makefile) = "0"]; then