From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Wed, 17 Aug 2022 02:00:04 +0000 (-0700)
Subject: [PATCH] Makefile: Use relative paths for debugging symbols.
X-Git-Tag: archive/raspbian/2024.01+dfsg-5+rpi1~3^2^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=f7a0459e667d825fd9819a42398f2fb7ac906aed;p=u-boot.git

[PATCH] Makefile: Use relative paths for debugging symbols.

The KBUILD_CFLAGS and KBUILD_AFLAGS variables are adjusted to use
-ffile-prefix-map and --debug-prefix-map, respectively, to use
relative paths for occurrences of __FILE__ and debug paths.

This enables reproducible builds regardless of the absolute path to
the build directory:

  https://reproducible-builds.org/docs/build-path/

Series-to: u-boot

Signed-off-by: Vagrant Cascadian <vagrant@reproducible-builds.org>

Gbp-Pq: Name Makefile-Use-relative-paths-for-debugging-symbols.patch
---

diff --git a/Makefile b/Makefile
index ac84c59ac..258137707 100644
--- a/Makefile
+++ b/Makefile
@@ -769,14 +769,18 @@ KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
 # Enabled with W=2, disabled by default as noisy
 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
 
-# change __FILE__ to the relative path from the srctree
-KBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
+# change __FILE__ and debugging symbols to the relative path from the
+# srctree
+KBUILD_CFLAGS	+= $(call cc-option,-ffile-prefix-map=$(srctree)/=)
 
 KBUILD_CFLAGS	+= -gdwarf-4
 # $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
 # option to the assembler.
 KBUILD_AFLAGS	+= -gdwarf-4
 
+# Use relative paths in debugging symbols
+KBUILD_AFLAGS   += --debug-prefix-map=$(srctree)/=
+
 # Report stack usage if supported
 # ARC tools based on GCC 7.1 has an issue with stack usage
 # with naked functions, see commit message for more details