From 1f71bcabb77df482cc0dc7bab90a73e15f3e347b Mon Sep 17 00:00:00 2001
From: Mehdi Amini <joker.eph@gmail.com>
Date: Fri, 16 Jul 2021 03:32:59 +0000
Subject: [PATCH] Build libSupport with -Werror=global-constructors (NFC)
Ensure that libSupport does not carry any static global initializer.
libSupport can be embedded in use cases where we don't want to load all
cl::opt unless we want to parse the command line.
ManagedStatic can be used to enable lazy-initialization of globals.
---
llvm/lib/Support/CMakeLists.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/llvm/lib/Support/CMakeLists.txt b/llvm/lib/Support/CMakeLists.txt
index 2242b0ec60ab..57058c6704e0 100644
--- a/llvm/lib/Support/CMakeLists.txt
+++ b/llvm/lib/Support/CMakeLists.txt
@@ -1,5 +1,11 @@
include(GetLibraryName)
+# Ensure that libSupport does not carry any static global initializer.
+# libSupport can be embedded in use cases where we don't want to load all
+# cl::opt unless we want to parse the command line.
+# ManagedStatic can be used to enable lazy-initialization of globals.
+add_flag_if_supported("-Werror=global-constructors" WERROR_GLOBAL_CONSTRUCTOR)
+
if(LLVM_ENABLE_ZLIB)
set(imported_libs ZLIB::ZLIB)
endif()
--
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