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makefile: restore -O2 to clang non-debug builds

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- clang's list of optimization options makes no mention of strict-overflow
   or no-strict-overflow, but it silently accepts -fno-strict-overflow and
   in fact honors it.
This commit is contained in:
Mark Pizzolato 2018-09-27 06:22:04 -07:00
parent 3f2d76eee5
commit 9414b6b98e
1 changed files with 7 additions and 6 deletions
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13
makefile
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@ -1043,16 +1043,15 @@ ifneq ($(DEBUG),)
BUILD_FEATURES = - debugging support
else
ifneq (,$(findstring clang,$(COMPILER_NAME))$(findstring LLVM,$(COMPILER_NAME)))
CFLAGS_O = -O0
ifeq (Darwin,$(OSTYPE))
NO_LTO = 1
endif
CFLAGS_O = -O2 -fno-strict-overflow
GCC_OPTIMIZERS_CMD = $(GCC) --help
NO_LTO = 1
else
NO_LTO = 1
ifeq (Darwin,$(OSTYPE))
CFLAGS_O += -O4 -fno-strict-overflow -flto -fwhole-program
CFLAGS_O += -O4 -flto -fwhole-program
else
CFLAGS_O := -O2 -fno-strict-overflow
CFLAGS_O := -O2
endif
endif
LDFLAGS_O =
@ -1061,6 +1060,8 @@ else
ifeq (,$(GCC_OPTIMIZERS_CMD))
GCC_OPTIMIZERS_CMD = $(GCC) --help=optimizers
endif
endif
ifneq (,$(GCC_OPTIMIZERS_CMD))
GCC_OPTIMIZERS = $(shell $(GCC_OPTIMIZERS_CMD))
endif
ifneq (,$(findstring $(GCC_VERSION),$(LTO_EXCLUDE_VERSIONS)))