diff mbox series

[meta-oe] libtracefs: support reproducible builds

Message ID 20251120061201.684136-1-changqing.li@windriver.com
State New
Headers show
Series [meta-oe] libtracefs: support reproducible builds | expand

Commit Message

Changqing Li Nov. 20, 2025, 6:12 a.m. UTC 
From: Changqing Li <changqing.li@windriver.com>

[snip of Makefile]
 # bison will create both sqlhist.tab.c and sqlhist.tab.h
sqlhist.tab.h:
sqlhist.tab.c: sqlhist.y sqlhist.tab.h
    bison --debug -v --report-file=bison.report -d -o $@ $<
[snip]

sources of libtracefs is fetched by git, the mtime of sqlhist.y,
sqlhist.tab.c is random. so sometimes, sqlhist.tab.c is regenerated,
sometimes, sqlhist.tab.c in original sources in used. bison used to
gernerate sqlhist.tab.c by upstream libtracefs maybe has different
version with the build host one. This make the final libtracefs.so not
reproducible. This fix touch sqlhist.tab.c to make it has the newest
mtime, and sqlhist.tab.c is not regenerated during build.

Signed-off-by: Changqing Li <changqing.li@windriver.com>
---
 meta-oe/recipes-kernel/libtracefs/libtracefs_1.8.2.bb | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/meta-oe/recipes-kernel/libtracefs/libtracefs_1.8.2.bb b/meta-oe/recipes-kernel/libtracefs/libtracefs_1.8.2.bb
index b6bae96896..35eabc7b11 100644
--- a/meta-oe/recipes-kernel/libtracefs/libtracefs_1.8.2.bb
+++ b/meta-oe/recipes-kernel/libtracefs/libtracefs_1.8.2.bb
@@ -16,6 +16,10 @@  SRC_URI = "git://git.kernel.org/pub/scm/libs/libtrace/libtracefs.git;branch=${BP
 
 inherit pkgconfig bash-completion
 
+do_compile:prepend() {
+    touch ${S}/src/sqlhist.tab.c
+}
+
 do_install() {
     oe_runmake install DESTDIR=${D} pkgconfig_dir=${libdir}/pkgconfig
 }