From 0a8e3e0748c41d3c1989b17738f589b8b1bb2378 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Fri, 29 Sep 2023 14:51:12 +0200
Subject: [PATCH] gcc: create dummy crtstuff on loongarch64

---
 .../gcc/common/libgcc-buildstuff.nix          | 23 +++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/compilers/gcc/common/libgcc-buildstuff.nix b/pkgs/development/compilers/gcc/common/libgcc-buildstuff.nix
index e7dc570a560c..fc88e61c6560 100644
--- a/pkgs/development/compilers/gcc/common/libgcc-buildstuff.nix
+++ b/pkgs/development/compilers/gcc/common/libgcc-buildstuff.nix
@@ -31,7 +31,22 @@ let
   #
   SHLIB_LC = lib.optionalString stdenv.targetPlatform.isPower "-mnewlib";
 
-in ''
-    echo 'libgcc.a: ${crtstuff-ofiles}' >> libgcc/Makefile.in
-    echo 'SHLIB_LC=${SHLIB_LC}' >> libgcc/Makefile.in
-  ''
+in
+''
+  echo 'libgcc.a: ${crtstuff-ofiles}' >> libgcc/Makefile.in
+  echo 'SHLIB_LC=${SHLIB_LC}' >> libgcc/Makefile.in
+''
+
+  # Meanwhile, crt{i,n}.S are not present on certain platforms
+  # (e.g. LoongArch64), resulting in the following error:
+  #
+  # No rule to make target '../../../gcc-xx.x.x/libgcc/config/loongarch/crti.S', needed by 'crti.o'.  Stop.
+  #
+  # For LoongArch64, a hacky workaround is to simply touch them,
+  # as the platform forces .init_array support.
+  #
+  # https://www.openwall.com/lists/musl/2022/11/09/3
+  #
+  + lib.optionalString stdenv.targetPlatform.isLoongArch64 ''
+  touch libgcc/config/loongarch/crt{i,n}.S
+''