package_rpm.bbclass: clamp timestamps

Improve binary reproducibility of RPM packages.
Ensure timestamps in RPM packages are not later than the value
of SOURCE_DATE_EPOCH. If SOURCE_DATE_EPOCH is not set,
timestamps are not clamped.

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes/package_rpm.bbclass b/meta/classes/package_rpm.bbclass
index 1deaf832da7f7f8adf9ba256f42c2d02c282429f..b08608c8466714e572ef69f428ff4675f16c86e4 100644 (file)
--- a/meta/classes/package_rpm.bbclass
+++ b/meta/classes/package_rpm.bbclass
@@ -668,6 +668,7 @@ python do_package_rpm () {
     cmd = cmd + " --define '_build_id_links none'"
     cmd = cmd + " --define '_binary_payload w6T.xzdio'"
     cmd = cmd + " --define '_source_payload w6T.xzdio'"
+    cmd = cmd + " --define 'clamp_mtime_to_source_date_epoch 1'"
     if perfiledeps:
         cmd = cmd + " --define '__find_requires " + outdepends + "'"
         cmd = cmd + " --define '__find_provides " + outprovides + "'"