syslinux: Fix reproducibility issues

Add sorting to wildcard expansion in the makefile to make builds
reproducible.

(From OE-Core rev: 5541ba76ccc0c416f315bc0dc14a20a33059bd5f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 27 insertions, 0 deletions

diff --git a/meta/recipes-devtools/syslinux/syslinux/determinism.patch b/meta/recipes-devtools/syslinux/syslinux/determinism.patch
new file mode 100644
index 0000000000..2fb8c64df3
--- /dev/null
+++ b/meta/recipes-devtools/syslinux/syslinux/determinism.patch
@@ -0,0 +1,22 @@
+In order to build deterministic binaries, we need to sort the wildcard expansion
+so the libraries are linked in the same order each time. This fixes reproducibility
+issues within syslinux builds.
+
+Upstream-Status: Pending
+RP 2021/3/1
+
+Index: syslinux-6.04-pre2/mk/lib.mk
+===================================================================
+--- syslinux-6.04-pre2.orig/mk/lib.mk
++++ syslinux-6.04-pre2/mk/lib.mk
+@@ -130,8 +130,8 @@ LIBENTRY_OBJS = \
+        exit.o
+ 
+ LIBGCC_OBJS = \
+-         $(patsubst $(com32)/lib/%.c,%.o,$(wildcard $(com32)/lib/$(ARCH)/libgcc/*.c)) \
+-         $(patsubst $(com32)/lib/%.S,%.o,$(wildcard $(com32)/lib/$(ARCH)/libgcc/*.S))
++         $(sort $(patsubst $(com32)/lib/%.c,%.o,$(wildcard $(com32)/lib/$(ARCH)/libgcc/*.c))) \
++         $(sort $(patsubst $(com32)/lib/%.S,%.o,$(wildcard $(com32)/lib/$(ARCH)/libgcc/*.S)))
+ 
+ LIBCONSOLE_OBJS = \
+        \
diff --git a/meta/recipes-devtools/syslinux/syslinux_6.04-pre2.bb b/meta/recipes-devtools/syslinux/syslinux_6.04-pre2.bb
index 8d78f62efa..dadba9eca9 100644
--- a/meta/recipes-devtools/syslinux/syslinux_6.04-pre2.bb
+++ b/meta/recipes-devtools/syslinux/syslinux_6.04-pre2.bb
@@ -20,11 +20,16 @@ SRC_URI = "https://www.zytor.com/pub/syslinux/Testing/6.04/syslinux-${PV}.tar.xz
            file://0009-linux-syslinux-implement-install_bootblock.patch \
            file://0010-Workaround-multiple-definition-of-symbol-errors.patch \
            file://0001-install-don-t-install-obsolete-file-com32.ld.patch \
+           file://determinism.patch \
            "
 
 SRC_URI[md5sum] = "2b31c78f087f99179feb357da312d7ec"
 SRC_URI[sha256sum] = "4441a5d593f85bb6e8d578cf6653fb4ec30f9e8f4a2315a3d8f2d0a8b3fadf94"
 
+# remove at next version upgrade or when output changes
+PR = "r1"
+HASHEQUIV_HASH_VERSION .= ".1"
+
 RECIPE_NO_UPDATE_REASON = "6.04-pre3 is broken"
 UPSTREAM_CHECK_URI = "https://www.zytor.com/pub/syslinux/"
 UPSTREAM_CHECK_REGEX = "syslinux-(?P<pver>.+)\.tar"