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Disable ThinLTO when using Clang.

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Benchmarking with current Clang 12 shows that
and ThinLTO is a pessimization, see issue #3341.

closes https://github.com/official-stockfish/Stockfish/pull/3345

No functional change.
This commit is contained in:
Gian-Carlo Pascutto 2021-02-09 14:05:35 +01:00 • committed by Joost VandeVondele
parent 1f87a9eb6c
commit b15e3b3fa9
1 changed files with 2 additions and 2 deletions
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4
src/Makefile
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@ -590,7 +590,7 @@ endif
ifeq ($(optimize),yes) ifeq ($(optimize),yes)
ifeq ($(debug), no) ifeq ($(debug), no)
ifeq ($(comp),clang) ifeq ($(comp),clang)
CXXFLAGS += -flto=thin CXXFLAGS += -flto
ifneq ($(findstring MINGW,$(KERNEL)),) ifneq ($(findstring MINGW,$(KERNEL)),)
CXXFLAGS += -fuse-ld=lld CXXFLAGS += -fuse-ld=lld
else ifneq ($(findstring MSYS,$(KERNEL)),) else ifneq ($(findstring MSYS,$(KERNEL)),)
@ -610,7 +610,7 @@ ifeq ($(debug), no)
LDFLAGS += -save-temps LDFLAGS += -save-temps
endif endif
else else
CXXFLAGS += -flto=thin CXXFLAGS += -flto
LDFLAGS += $(CXXFLAGS) LDFLAGS += $(CXXFLAGS)
endif endif