openocd : Fix non reproducible build

This package defines PKGBLDDATE as build timestamp which makes
it non reproducible. Use SOURCE_DATE_EPOCH if it is found, otherwise
use build timestamp. Following best practices, see :
https://reproducible-builds.org/docs/source-date-epoch/

Co-developed-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Sofiane HAMAM <sofiane.hamam@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 39 insertions, 0 deletions

diff --git a/meta-oe/recipes-devtools/openocd/openocd/0001-Makefile.am-Use-SOURCE_DATE_EPOCH-environment-variab.patch b/meta-oe/recipes-devtools/openocd/openocd/0001-Makefile.am-Use-SOURCE_DATE_EPOCH-environment-variab.patch
new file mode 100644
index 0000000000..c0a1803a9a
--- /dev/null
+++ b/meta-oe/recipes-devtools/openocd/openocd/0001-Makefile.am-Use-SOURCE_DATE_EPOCH-environment-variab.patch
@@ -0,0 +1,38 @@
+From 65969a2b73ce93db4c80f1706677351b0e57fa72 Mon Sep 17 00:00:00 2001
+From: Sofiane HAMAM <sofiane.hamam@smile.fr>
+Date: Fri, 28 Mar 2025 12:31:17 +0100
+Subject: [PATCH] Makefile.am: Use SOURCE_DATE_EPOCH environment variable
+
+This package defines PKGBLDDATE as build timestamp which makes
+it non reproducible. Use SOURCE_DATE_EPOCH if it is found, otherwise
+use build timestamp. Following best practices, see :
+https://reproducible-builds.org/docs/source-date-epoch/
+
+The patch is BSD compatible too.
+
+Change-Id: I26c1a00f2e8059ae31fe72a794b5962af5a84f44
+Co-developed-by: Yoann Congal <yoann.congal@smile.fr>
+Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
+Signed-off-by: Sofiane HAMAM <sofiane.hamam@smile.fr>
+
+Upstream-Status: Submitted [https://review.openocd.org/c/openocd/+/8619]
+---
+ src/Makefile.am | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/Makefile.am b/src/Makefile.am
+index 6d79cd631..9ca697407 100644
+--- a/src/Makefile.am
++++ b/src/Makefile.am
+@@ -30,7 +30,10 @@ if RELEASE
+ else
+ %C%_libopenocd_la_CPPFLAGS += -DRELSTR=\"`$(top_srcdir)/guess-rev.sh $(top_srcdir)`\"
+ %C%_libopenocd_la_CPPFLAGS += -DGITVERSION=\"`cd $(top_srcdir) && git describe`\"
+-%C%_libopenocd_la_CPPFLAGS += -DPKGBLDDATE=\"`date +%F-%R`\"
++%C%_libopenocd_la_CPPFLAGS += -DPKGBLDDATE=\"`DATE_FMT=+%F-%R; \
++       SOURCE_DATE_EPOCH="$${SOURCE_DATE_EPOCH:-$$(date +%s)}"; \
++       date -u -d "@$$SOURCE_DATE_EPOCH" "$$DATE_FMT" 2>/dev/null || \
++       date -u -r "$$SOURCE_DATE_EPOCH" "$$DATE_FMT" 2>/dev/null || date -u "$$DATE_FMT"`\"
+ endif
+ 
+ # add default CPPFLAGS
diff --git a/meta-oe/recipes-devtools/openocd/openocd_git.bb b/meta-oe/recipes-devtools/openocd/openocd_git.bb
index 559fe29ff8..b1ce2ec168 100644
--- a/meta-oe/recipes-devtools/openocd/openocd_git.bb
+++ b/meta-oe/recipes-devtools/openocd/openocd_git.bb
@@ -9,6 +9,7 @@ SRC_URI = " \
     git://repo.or.cz/r/git2cl.git;protocol=http;destsuffix=tools/git2cl;name=git2cl;branch=master \
     git://github.com/msteveb/jimtcl.git;protocol=https;destsuffix=git/jimtcl;name=jimtcl;branch=master \
     git://repo.or.cz/r/libjaylink.git;protocol=http;destsuffix=git/src/jtag/drivers/libjaylink;name=libjaylink;branch=master \
+    file://0001-Makefile.am-Use-SOURCE_DATE_EPOCH-environment-variab.patch \
 "
 
 SRCREV_FORMAT = "openocd"