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Simple changes to support builds for ppc64[le] consistent with X86

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These simple changes are required to allow builds on ppc64[le] systems
consistent with X86. The Makefile now recognizes both ppc64 and ppc64le, and
in the absence of PORTABLE=1, the code will be built analogously to the X86
-march=native.

Note that although GCC supports -mcpu=native -mtune=native on POWER, it
doesn't work correctly on all systems. This is why we need to get the actual
machine model from the AUX vector.
This commit is contained in:
bcbrock 2016-01-19 09:08:19 -06:00
parent 83e1de92af
commit f423f05dcd
3 changed files with 9 additions and 3 deletions
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2
INSTALL.md
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@ -21,7 +21,7 @@ depend on gflags. You will need to have gflags installed to run `make all`. This
use binaries compiled by `make all` in production. use binaries compiled by `make all` in production.
* By default the binary we produce is optimized for the platform you're compiling on * By default the binary we produce is optimized for the platform you're compiling on
(-march=native). If you want to build a portable binary, add 'PORTABLE=1' before (-march=native or the equivalent). If you want to build a portable binary, add 'PORTABLE=1' before
your make commands, like this: `PORTABLE=1 make static_lib` your make commands, like this: `PORTABLE=1 make static_lib`
## Dependencies ## Dependencies

2
Makefile
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@ -84,7 +84,7 @@ endif
# compile with -O2 if debug level is not 2 # compile with -O2 if debug level is not 2
ifneq ($(DEBUG_LEVEL), 2) ifneq ($(DEBUG_LEVEL), 2)
OPT += -O2 -fno-omit-frame-pointer OPT += -O2 -fno-omit-frame-pointer
ifneq ($(MACHINE),ppc64) # ppc64 doesn't support -momit-leaf-frame-pointer ifeq (,$(findstring ppc64,$(MACHINE))) # ppc64[le] doesn't support -momit-leaf-frame-pointer
OPT += -momit-leaf-frame-pointer OPT += -momit-leaf-frame-pointer
endif endif
endif endif

6
build_tools/build_detect_platform
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@ -359,8 +359,14 @@ if test "$USE_SSE"; then
# if Intel SSE instruction set is supported, set USE_SSE=1 # if Intel SSE instruction set is supported, set USE_SSE=1
COMMON_FLAGS="$COMMON_FLAGS -msse -msse4.2 " COMMON_FLAGS="$COMMON_FLAGS -msse -msse4.2 "
elif test -z "$PORTABLE"; then elif test -z "$PORTABLE"; then
if test -n "`echo $TARGET_ARCHITECTURE | grep ^ppc64`"; then
# Tune for this POWER processor, treating '+' models as base models
POWER=`LD_SHOW_AUXV=1 /bin/true | grep AT_PLATFORM | grep -E -o power[0-9]+`
COMMON_FLAGS="$COMMON_FLAGS -mcpu=$POWER -mtune=$POWER "
else
COMMON_FLAGS="$COMMON_FLAGS -march=native " COMMON_FLAGS="$COMMON_FLAGS -march=native "
fi fi
fi
PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS" PLATFORM_CCFLAGS="$PLATFORM_CCFLAGS $COMMON_FLAGS"
PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS" PLATFORM_CXXFLAGS="$PLATFORM_CXXFLAGS $COMMON_FLAGS"