From: Nico Weber <thakis@chromium.org>
Date: Fri, 30 Oct 2020 17:48:44 +0000 (-0400)
Subject: [gn build] port e58660750e76
X-Git-Tag: llvmorg-13-init~7565
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0332e98cb8f5310bd29bb63991d025301a232eb2;p=platform%2Fupstream%2Fllvm.git

[gn build] port e58660750e76

Made necessary by c479e0c99459e4, which requires std::timespec
to exist, which it only does in c++17 and later.
---

diff --git a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
index 71668b6..150ab64 100644
--- a/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/src/BUILD.gn
@@ -53,7 +53,10 @@ config("cxx_config") {
     "-Wno-user-defined-literals",
     "-Wno-covered-switch-default",
   ]
-  cflags_cc = [ "-nostdinc++" ]
+  cflags_cc = [
+    "-std=c++17",
+    "-nostdinc++",
+  ]
   defines = [ "_LIBCPP_BUILDING_LIBRARY" ]
   if (target_os == "win") {
     cflags += [ "/Zl" ]