From debe8e9f69d128e2113e53d7303f5b8e1b5604bb Mon Sep 17 00:00:00 2001
From: Alexey Gladkov <legion@altlinux.org>
Date: Mon, 27 Aug 2018 14:59:55 +0300
Subject: [PATCH] ALT: allow to override clang through env variables

[ mikhailnov@ROSA: added *FLAGS envs. ]
---
 build/toolchain/gcc_toolchain.gni | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/build/toolchain/gcc_toolchain.gni b/build/toolchain/gcc_toolchain.gni
index 6e3c02444d0..bc6c6d705d3 100644
--- a/build/toolchain/gcc_toolchain.gni
+++ b/build/toolchain/gcc_toolchain.gni
@@ -627,20 +627,32 @@ template("clang_toolchain") {
 
   gcc_toolchain(target_name) {
     prefix = rebase_path("$clang_base_path/bin", root_build_dir)
     cc = "$prefix/clang"
     cxx = "$prefix/clang++"
     ld = cxx
     readelf = "${toolprefix}readelf"
     ar = "${prefix}/llvm-ar"
     nm = "${toolprefix}nm"
 
+    cc = getenv("CC")
+    cxx = getenv("CXX")
+    ld = getenv("CXX")
+    readelf = getenv("READELF")
+    ar = getenv("AR")
+    nm = getenv("NM")
+
+    extra_cflags = getenv("CFLAGS")
+    extra_cppflags = getenv("CPPFLAGS")
+    extra_cxxflags = getenv("CXXFLAGS")
+    extra_ldflags = getenv("LDFLAGS")
+
     forward_variables_from(invoker,
                            [
                              "strip",
                              "default_shlib_subdir",
                              "enable_linker_map",
                              "use_unstripped_as_runtime_outputs",
                            ])
 
     toolchain_args = {
       if (defined(invoker.toolchain_args)) {
-- 
2.25.4