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build: Improve -momit-leaf-frame-pointer usage

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-momit-leaf-frame-pointer is only supported on certain archs.
Detect this automatically based on which flags the compiler
understands.
This commit is contained in:
James Page 2016-02-29 09:03:24 +00:00
parent 8800975fb0
commit 7ca731b12c
1 changed files with 2 additions and 3 deletions
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5
Makefile
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@ -84,12 +84,11 @@ endif
# compile with -O2 if debug level is not 2
ifneq ($(DEBUG_LEVEL), 2)
OPT += -O2 -fno-omit-frame-pointer
ifeq (,$(findstring ppc64,$(MACHINE))) # ppc64[le] doesn't support -momit-leaf-frame-pointer
ifneq ($(MACHINE),armv7l)
# Skip for archs that don't support -momit-leaf-frame-pointer
ifeq (,$(shell $(CXX) -fsyntax-only -momit-leaf-frame-pointer -xc /dev/null 2>&1))
OPT += -momit-leaf-frame-pointer
endif
endif
endif
# if we're compiling for release, compile without debug code (-DNDEBUG) and
# don't treat warnings as errors