depot/third_party/nixpkgs/pkgs/development/compilers/tinygo/0002-Add-clang-header-path.patch

From 301b2d82cdbfaffe4dfba1d2cfed068a4115f730 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mustafa=20=C3=87al=C4=B1=C5=9Fkan?= <muscaln@protonmail.com>
Date: Sat, 30 Apr 2022 16:18:31 +0300
Subject: [PATCH 2/3] Add clang header path


diff --git a/builder/builtins.go b/builder/builtins.go
index 121398fa..a589988b 100644
--- a/builder/builtins.go
+++ b/builder/builtins.go
@@ -170,7 +170,7 @@ var aeabiBuiltins = []string{
 var CompilerRT = Library{
 	name: "compiler-rt",
 	cflags: func(target, headerPath string) []string {
-		return []string{"-Werror", "-Wall", "-std=c11", "-nostdlibinc"}
+		return []string{"-Werror", "-Wall", "-std=c11", "-isystem", "@clang_include@"}
 	},
 	sourceDir: func() string {
 		llvmDir := filepath.Join(goenv.Get("TINYGOROOT"), "llvm-project/compiler-rt/lib/builtins")
diff --git a/builder/picolibc.go b/builder/picolibc.go
index f1b061ae..159f90cf 100644
--- a/builder/picolibc.go
+++ b/builder/picolibc.go
@@ -27,7 +27,7 @@ var Picolibc = Library{
 			"-D_COMPILING_NEWLIB",
 			"-DHAVE_ALIAS_ATTRIBUTE",
 			"-DTINY_STDIO",
-			"-nostdlibinc",
+			"-isystem", "@clang_include@",
 			"-isystem", picolibcDir + "/include",
 			"-I" + picolibcDir + "/tinystdio",
 			"-I" + headerPath,
diff --git a/compileopts/config.go b/compileopts/config.go
index a006b673..3a105b49 100644
--- a/compileopts/config.go
+++ b/compileopts/config.go
@@ -279,6 +279,7 @@ func (c *Config) CFlags() []string {
 		path, _ := c.LibcPath("picolibc")
 		cflags = append(cflags,
 			"--sysroot="+path,
+			"-isystem", "@clang_include@",
 			"-isystem", filepath.Join(path, "include"), // necessary for Xtensa
 			"-isystem", filepath.Join(picolibcDir, "include"),
 			"-isystem", filepath.Join(picolibcDir, "tinystdio"),
@@ -288,7 +289,6 @@ func (c *Config) CFlags() []string {
 		path, _ := c.LibcPath("musl")
 		arch := MuslArchitecture(c.Triple())
 		cflags = append(cflags,
-			"-nostdlibinc",
 			"-isystem", filepath.Join(path, "include"),
 			"-isystem", filepath.Join(root, "lib", "musl", "arch", arch),
 			"-isystem", filepath.Join(root, "lib", "musl", "include"),
-- 
2.37.2