[PR PATCH] gcc6: update template to workaround file-prefix-map

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

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

https://github.com/Johnnynator/void-packages gcc6
https://github.com/void-linux/void-packages/pull/43224

gcc6: update template to workaround file-prefix-map
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A patch file from https://github.com/void-linux/void-packages/pull/43224.patch is attached

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From 51d852bb595074367cd346334371e9c58f93a2f3 Mon Sep 17 00:00:00 2001
From: John <me@johnnynator.dev>
Date: Mon, 3 Apr 2023 00:41:41 +0200
Subject: [PATCH] gcc6: update template to workaround file-prefix-map

---
 srcpkgs/gcc6/patches/090-musl.patch | 11 +++++++++++
 srcpkgs/gcc6/template               |  4 ++++
 2 files changed, 15 insertions(+)
 create mode 100644 srcpkgs/gcc6/patches/090-musl.patch

diff --git a/srcpkgs/gcc6/patches/090-musl.patch b/srcpkgs/gcc6/patches/090-musl.patch
new file mode 100644
index 000000000000..4a83ced3c28f
--- /dev/null
+++ b/srcpkgs/gcc6/patches/090-musl.patch
@@ -0,0 +1,11 @@
+--- a/gcc/config/i386/i386.c	2023-04-03 00:23:52.367607124 +0200
++++ -	2023-04-03 00:30:12.723657534 +0200
+@@ -8747,7 +8747,7 @@
+ 			 HOST_WIDE_INT words)
+ {
+   int res = 0;
+-  bool error_p = NULL;
++  bool error_p = false;
+ 
+   if (TARGET_IAMCU)
+     {
diff --git a/srcpkgs/gcc6/template b/srcpkgs/gcc6/template
index 98d46a4126e5..cc65fa8e9826 100644
--- a/srcpkgs/gcc6/template
+++ b/srcpkgs/gcc6/template
@@ -108,6 +108,10 @@ do_configure() {
 	export CFLAGS="${CFLAGS/-D_FORTIFY_SOURCE=2/}"
 	export CXXFLAGS="${CXXFLAGS/-D_FORTIFY_SOURCE=2/}"
 
+	# file-prefix-map isn't supported in gcc6
+	export CFLAGS="${CFLAGS/-ffile-prefix-map=$wrksrc=./}"
+	export CXXFLAGS="${CXXFLAGS/-ffile-prefix-map=$wrksrc=./}"
+
 	# Disable explicit -fno-PIE, gcc will figure this out itself.
 	export CFLAGS="${CFLAGS//-fno-PIE/}"
 	export CXXFLAGS="${CXXFLAGS//-fno-PIE/}"