File brp-75-ar-initial-version.patch of Package brp-check-suse.19625

From 8b8f53b80db142956a02ac7d984f00094ab5af94 Mon Sep 17 00:00:00 2001
From: "Bernhard M. Wiedemann" <bwiedemann@suse.de>
Date: Tue, 23 Jan 2018 13:10:41 +0100
Subject: [PATCH] Add brp-75-ar

for normalizing ar archives (.a files) mtime, UID/GID
to facilitate bit-identical reproducible builds.

See https://reproducible-builds.org/ for why this is good.

Ignoring objdump return code, because there are packages like
cross-avr-gcc7 that have .a files for different architectures
that cannot be processed by the build system's objdump.

diff --git a/brp-75-ar b/brp-75-ar
new file mode 100755
index 0000000..3b852ac
--- /dev/null
+++ b/brp-75-ar
@@ -0,0 +1,14 @@
+#!/bin/bash
+# If using normal root, avoid changing anything.
+if [ -z "$RPM_BUILD_ROOT" -o "$RPM_BUILD_ROOT" = "/" ]; then
+	echo "RPM_BUILD_ROOT is not set or set to / : skipping ar normalization"
+	exit 0
+fi
+if [ -z "$SOURCE_DATE_EPOCH" ] ; then
+	echo "SOURCE_DATE_EPOCH is not set: skipping ar normalization"
+	exit 0
+fi
+
+while read f; do
+	! file "$f" | grep -q "ar archive" || objcopy -D "$f" || true
+done < <(find "$RPM_BUILD_ROOT" -type f -name "*.a" -print)