0001-Fix-reproducibility-issue.patch

From 5945947178d66f3eb56652e635537b3de6633fb8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Henrique=20Ferreira=20de=20Freitas?=
 <joaohf@gmail.com>
Date: Sun, 22 Jan 2023 10:54:12 -0300
Subject: [PATCH] Fix reproducibility issue

make_compiler_flags writes CFLAGS, LDFLAGS and config.h output to
erl_compile_flags.h. However, that makes some host build path goes to the
final binary leading errors when there are checks for reproducibility
builds.

The approach here is to remove well know flags with build host paths.

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

Upstream-Status: Inappropriate [oe specific]
---
 erts/emulator/Makefile.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index f7c679a3a8..f1de47a687 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -590,7 +590,8 @@ ifeq ($(TARGET), win32)
 TMPVAR := $(shell LANG=C $(PERL) utils/make_compiler_flags -o $(TTF_DIR)/erl_compile_flags.h -v CONFIG_H "N/A" -v CFLAGS "$(CFLAGS)" -v LDFLAGS "$(LDFLAGS)")
 else
 # We force this to be run every time this makefile is executed
-TMPVAR := $(shell LANG=C $(PERL) utils/make_compiler_flags -o $(TTF_DIR)/erl_compile_flags.h -f CONFIG_H "$(ERL_TOP)/erts/$(TARGET)/config.h" -v CFLAGS "$(CFLAGS)" -v LDFLAGS "$(LDFLAGS)")
+TMPVAR0 := $(shell LANG=C $(PERL) utils/make_compiler_flags -o $(TTF_DIR)/erl_compile_flags.h -f CONFIG_H "$(ERL_TOP)/erts/$(TARGET)/config.h" -v CFLAGS "$(CFLAGS)" -v LDFLAGS "$(LDFLAGS)")
+TMPVAR1 := $(shell sed -i -e 's@[^ ]*-fmacro-prefix-map=[^ "]*@@g' -e 's@[^ ]*-fdebug-prefix-map=[^ "]*@@g' -e 's@[^ ]*-I[^ "]*@@g' $(TTF_DIR)/erl_compile_flags.h)
 endif
 
 GENERATE =