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Exclude LTO from gcc builds when compiler isn't known to support it.

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This commit is contained in:
Mark Pizzolato 2013-03-13 14:42:54 -07:00
parent c293e154b0
commit 147ca8ced2
1 changed files with 8 additions and 6 deletions
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14
makefile
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@ -111,12 +111,6 @@ ifeq ($(WIN32),) #*nix Environments (&& cygwin)
LIBPATH += /usr/X11/lib
OS_LDFLAGS += -L/usr/X11/lib
endif
# OSX's XCode gcc doesn't support LTO, but gcc built to explicitly enable it will work
ifneq (,$(GCC_VERSION))
ifeq (,$(shell $(GCC) -v /dev/null 2>&1 | grep '\-\-enable-lto'))
LTO_EXCLUDE_VERSIONS += $(GCC_VERSION)
endif
endif
else
ifeq (Linux,$(OSTYPE))
LIBPATH := $(sort $(foreach lib,$(shell /sbin/ldconfig -p | grep ' => /' | sed 's/^.* => //'),$(dir $(lib))))
@ -170,6 +164,14 @@ ifeq ($(WIN32),) #*nix Environments (&& cygwin)
endif
endif
endif
# Some gcc versions don't support LTO, so only use LTO when the compiler is known to support it
ifeq (,$(NO_LTO))
ifneq (,$(GCC_VERSION))
ifeq (,$(shell $(GCC) -v /dev/null 2>&1 | grep '\-\-enable-lto'))
LTO_EXCLUDE_VERSIONS += $(GCC_VERSION)
endif
endif
endif
endif
$(info lib paths are: $(LIBPATH))
find_lib = $(strip $(firstword $(foreach dir,$(strip $(LIBPATH)),$(wildcard $(dir)/lib$(1).$(LIBEXT)))))