[PR PATCH] environment: set -ffile-prefix-map

[sgn <sgn@users.noreply.github.com>]

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There is a new pull request by sgn against master on the void-packages repository

https://github.com/sgn/void-packages common-prefix-map
https://github.com/void-linux/void-packages/pull/40120

environment: set -ffile-prefix-map
We're setting -fdebug-prefix-map to strip directory prefixes from debug info, which will help ccache and reproducibility.

However, -fdebug-prefix-map doesn't help with those macros like __FILE__ and __BASE_FILE__, which needs another flags: -fmacro-prefix-map.

Replaces -fdebug-prefix-map with -ffile-prefix-map which is an alias for both `-fdebug-prefix-map` and `-fmacro-prefix-map`. (This flag is available since GCC 8 and Clang 10)

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A patch file from https://github.com/void-linux/void-packages/pull/40120.patch is attached

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From 9d39007a490be1801fd448abaeebb04a1164fefe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C4=90o=C3=A0n=20Tr=E1=BA=A7n=20C=C3=B4ng=20Danh?=
 <congdanhqx@gmail.com>
Date: Sun, 23 Oct 2022 07:32:23 +0700
Subject: [PATCH] environment: set -ffile-prefix-map

We're setting -fdebug-prefix-map to strip directory prefixes from debug
info, which will help ccache and reproducibility.

However, -fdebug-prefix-map doesn't help with those macros like __FILE__
and __BASE_FILE__, which needs another flags: -fmacro-prefix-map.

Replaces -fdebug-prefix-map with -ffile-prefix-map which is an alias for
both `-fdebug-prefix-map` and `-fmacro-prefix-map`. (This flag is
available since GCC 8 and Clang 10)
---
 .../environment/configure/debug-debug-prefix-map.sh  | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/common/environment/configure/debug-debug-prefix-map.sh b/common/environment/configure/debug-debug-prefix-map.sh
index 40b3a7b46bcc..d7eb0402f18b 100644
--- a/common/environment/configure/debug-debug-prefix-map.sh
+++ b/common/environment/configure/debug-debug-prefix-map.sh
@@ -1,16 +1,16 @@
 local _wrksrc="$wrksrc${build_wrksrc:+/$build_wrksrc}"
 case "$build_style" in
 cmake)
-	CFLAGS="${CFLAGS} -fdebug-prefix-map=$_wrksrc/${cmake_builddir:-build}=."
-	CXXFLAGS="${CXXFLAGS} -fdebug-prefix-map=$_wrksrc/${cmake_builddir:-build}=."
+	CFLAGS="${CFLAGS} -ffile-prefix-map=$_wrksrc/${cmake_builddir:-build}=."
+	CXXFLAGS="${CXXFLAGS} -ffile-prefix-map=$_wrksrc/${cmake_builddir:-build}=."
 	;;
 meson)
-	CFLAGS="${CFLAGS} -fdebug-prefix-map=$_wrksrc/${meson_builddir:-build}=."
-	CXXFLAGS="${CXXFLAGS} -fdebug-prefix-map=$_wrksrc/${meson_builddir:-build}=."
+	CFLAGS="${CFLAGS} -ffile-prefix-map=$_wrksrc/${meson_builddir:-build}=."
+	CXXFLAGS="${CXXFLAGS} -ffile-prefix-map=$_wrksrc/${meson_builddir:-build}=."
 	;;
 *)
-	CFLAGS="${CFLAGS} -fdebug-prefix-map=$_wrksrc=."
-	CXXFLAGS="${CXXFLAGS} -fdebug-prefix-map=$_wrksrc=."
+	CFLAGS="${CFLAGS} -ffile-prefix-map=$_wrksrc=."
+	CXXFLAGS="${CXXFLAGS} -ffile-prefix-map=$_wrksrc=."
 esac
 
 unset _wrksrc