From 0319a561eca36eb99379fc000fad82f8ee71f74f Mon Sep 17 00:00:00 2001
From: Yureka <yuka@yuka.dev>
Date: Sat, 24 Dec 2022 13:41:58 +0100
Subject: [PATCH] pkgsMusl.gccgo: fix build

---
 pkgs/development/compilers/gcc/12/default.nix | 40 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 +-
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/gcc/12/default.nix b/pkgs/development/compilers/gcc/12/default.nix
index 78c7a12027ce..3c9362fee1ad 100644
--- a/pkgs/development/compilers/gcc/12/default.nix
+++ b/pkgs/development/compilers/gcc/12/default.nix
@@ -16,6 +16,7 @@
 , gmp, mpfr, libmpc, gettext, which, patchelf
 , isl ? null # optional, for the Graphite optimization framework.
 , zlib ? null
+, libucontext ? null
 , gnatboot ? null
 , enableMultilib ? false
 , enablePlugin ? stdenv.hostPlatform == stdenv.buildPlatform # Whether to support user-supplied plug-ins
@@ -70,6 +71,44 @@ let majorVersion = "12";
       })
       ++ optional langD ../libphobos.patch
 
+      # backport fixes to build gccgo with musl libc
+      ++ optionals (langGo && stdenv.hostPlatform.isMusl) [
+        (fetchpatch {
+          excludes = [ "gcc/go/gofrontend/MERGE" ];
+          url = "https://github.com/gcc-mirror/gcc/commit/cf79b1117bd177d3d4c6ed24b6fa243c3628ac2d.diff";
+          hash = "sha256-mS5ZiYi5D8CpGXrWg3tXlbhp4o86ew1imCTwaHLfl+I=";
+        })
+        (fetchpatch {
+          excludes = [ "gcc/go/gofrontend/MERGE" ];
+          url = "https://github.com/gcc-mirror/gcc/commit/7f195a2270910a6ed08bd76e3a16b0a6503f9faf.diff";
+          hash = "sha256-Ze/cFM0dQofKH00PWPDoklXUlwWhwA1nyTuiDAZ6FKo=";
+        })
+        (fetchpatch {
+          excludes = [ "gcc/go/gofrontend/MERGE" ];
+          url = "https://github.com/gcc-mirror/gcc/commit/762fd5e5547e464e25b4bee435db6df4eda0de90.diff";
+          hash = "sha256-o28upwTcHAnHG2Iq0OewzwSBEhHs+XpBGdIfZdT81pk=";
+        })
+        (fetchpatch {
+          excludes = [ "gcc/go/gofrontend/MERGE" ];
+          url = "https://github.com/gcc-mirror/gcc/commit/e73d9fcafbd07bc3714fbaf8a82db71d50015c92.diff";
+          hash = "sha256-1SjYCVHLEUihdON2TOC3Z2ufM+jf2vH0LvYtZL+c1Fo=";
+        })
+        (fetchpatch {
+          excludes = [ "gcc/go/gofrontend/MERGE" ];
+          url = "https://github.com/gcc-mirror/gcc/commit/b6c6a3d64f2e4e9347733290aca3c75898c44b2e.diff";
+          hash = "sha256-RycJ3YCHd3MXtYFjxP0zY2Wuw7/C4bWoBAQtTKJZPOQ=";
+        })
+        (fetchpatch {
+          excludes = [ "gcc/go/gofrontend/MERGE" ];
+          url = "https://github.com/gcc-mirror/gcc/commit/2b1a604a9b28fbf4f382060bebd04adb83acc2f9.diff";
+          hash = "sha256-WiBQG0Xbk75rHk+AMDvsbrm+dc7lDH0EONJXSdEeMGE=";
+        })
+        (fetchpatch {
+          url = "https://github.com/gcc-mirror/gcc/commit/c86b726c048eddc1be320c0bf64a897658bee13d.diff";
+          hash = "sha256-QSIlqDB6JRQhbj/c3ejlmbfWz9l9FurdSWxpwDebnlI=";
+        })
+      ]
+
       # Obtain latest patch with ../update-mcfgthread-patches.sh
       ++ optional (!crossStageStatic && targetPlatform.isMinGW && threadsCross.model == "mcf") ./Added-mcf-thread-model-support-from-mcfgthread.patch;
 
@@ -178,6 +217,7 @@ stdenv.mkDerivation ({
     targetPackages.stdenv.cc.bintools # For linking code at run-time
   ] ++ (optional (isl != null) isl)
     ++ (optional (zlib != null) zlib)
+    ++ (optional (langGo && stdenv.hostPlatform.isMusl) libucontext)
     ;
 
   depsTargetTarget = optional (!crossStageStatic && threadsCross != {}) threadsCross.package;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b6c65ccccdf5..720530d117fc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -14491,7 +14491,7 @@ with pkgs;
 
   gnu-smalltalk = callPackage ../development/compilers/gnu-smalltalk { };
 
-  gccgo = wrapCC (gcc.cc.override {
+  gccgo = wrapCC ((if stdenv.hostPlatform.isMusl then gcc_latest else gcc).cc.override {
     name = "gccgo";
     langCC = true; #required for go.
     langC = true;