When cross-compiling for ia32, do not build 'host' targets with -m32
BUG=94852 TEST=it (cross-)compiles Review URL: http://codereview.chromium.org/7811014 git-svn-id: http://src.chromium.org/svn/trunk/src/build@101014 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
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common.gypi
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common.gypi
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@ -1428,73 +1428,77 @@
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},
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},
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},
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},
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'conditions': [
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'conditions': [
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[ 'target_arch=="ia32"', {
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['target_arch=="ia32"', {
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'asflags': [
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'target_conditions': [
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# Needed so that libs with .s files (e.g. libicudata.a)
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['_toolset=="target"', {
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# are compatible with the general 32-bit-ness.
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'asflags': [
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'-32',
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# Needed so that libs with .s files (e.g. libicudata.a)
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],
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# are compatible with the general 32-bit-ness.
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# All floating-point computations on x87 happens in 80-bit
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'-32',
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# precision. Because the C and C++ language standards allow
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],
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# the compiler to keep the floating-point values in higher
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# All floating-point computations on x87 happens in 80-bit
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# precision than what's specified in the source and doing so
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# precision. Because the C and C++ language standards allow
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# is more efficient than constantly rounding up to 64-bit or
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# the compiler to keep the floating-point values in higher
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# 32-bit precision as specified in the source, the compiler,
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# precision than what's specified in the source and doing so
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# especially in the optimized mode, tries very hard to keep
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# is more efficient than constantly rounding up to 64-bit or
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# values in x87 floating-point stack (in 80-bit precision)
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# 32-bit precision as specified in the source, the compiler,
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# as long as possible. This has important side effects, that
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# especially in the optimized mode, tries very hard to keep
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# the real value used in computation may change depending on
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# values in x87 floating-point stack (in 80-bit precision)
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# how the compiler did the optimization - that is, the value
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# as long as possible. This has important side effects, that
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# kept in 80-bit is different than the value rounded down to
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# the real value used in computation may change depending on
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# 64-bit or 32-bit. There are possible compiler options to make
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# how the compiler did the optimization - that is, the value
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# this behavior consistent (e.g. -ffloat-store would keep all
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# kept in 80-bit is different than the value rounded down to
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# floating-values in the memory, thus force them to be rounded
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# 64-bit or 32-bit. There are possible compiler options to
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# to its original precision) but they have significant runtime
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# make this behavior consistent (e.g. -ffloat-store would keep
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# performance penalty.
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# all floating-values in the memory, thus force them to be
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#
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# rounded to its original precision) but they have significant
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# -mfpmath=sse -msse2 makes the compiler use SSE instructions
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# runtime performance penalty.
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# which keep floating-point values in SSE registers in its
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#
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# native precision (32-bit for single precision, and 64-bit for
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# -mfpmath=sse -msse2 makes the compiler use SSE instructions
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# double precision values). This means the floating-point value
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# which keep floating-point values in SSE registers in its
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# used during computation does not change depending on how the
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# native precision (32-bit for single precision, and 64-bit
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# compiler optimized the code, since the value is always kept
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# for double precision values). This means the floating-point
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# in its specified precision.
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# value used during computation does not change depending on
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'conditions': [
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# how the compiler optimized the code, since the value is
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['branding=="Chromium" and disable_sse2==0', {
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# always kept in its specified precision.
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'conditions': [
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['branding=="Chromium" and disable_sse2==0', {
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'cflags': [
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'-march=pentium4',
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'-msse2',
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'-mfpmath=sse',
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],
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}],
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# ChromeOS targets Pinetrail, which is sse3, but most of the
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# benefit comes from sse2 so this setting allows ChromeOS
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# to build on other CPUs. In the future -march=atom would
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# help but requires a newer compiler.
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['chromeos==1 and disable_sse2==0', {
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'cflags': [
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'-msse2',
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],
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}],
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# Install packages have started cropping up with
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# different headers between the 32-bit and 64-bit
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# versions, so we have to shadow those differences off
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# and make sure a 32-bit-on-64-bit build picks up the
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# right files.
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['host_arch!="ia32"', {
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'include_dirs+': [
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'/usr/include32',
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],
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}],
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],
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# -mmmx allows mmintrin.h to be used for mmx intrinsics.
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# video playback is mmx and sse2 optimized.
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'cflags': [
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'cflags': [
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'-march=pentium4',
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'-m32',
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'-msse2',
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'-mmmx',
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'-mfpmath=sse',
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],
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'ldflags': [
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'-m32',
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],
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],
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}],
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}],
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# ChromeOS targets Pinetrail, which is sse3, but most of the
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# benefit comes from sse2 so this setting allows ChromeOS
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# to build on other CPUs. In the future -march=atom would help
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# but requires a newer compiler.
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['chromeos==1 and disable_sse2==0', {
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'cflags': [
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'-msse2',
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],
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}],
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# Install packages have started cropping up with
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# different headers between the 32-bit and 64-bit
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# versions, so we have to shadow those differences off
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# and make sure a 32-bit-on-64-bit build picks up the
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# right files.
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['host_arch!="ia32"', {
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'include_dirs+': [
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'/usr/include32',
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],
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}],
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],
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# -mmmx allows mmintrin.h to be used for mmx intrinsics.
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# video playback is mmx and sse2 optimized.
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'cflags': [
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'-m32',
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'-mmmx',
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],
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'ldflags': [
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'-m32',
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],
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],
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}],
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}],
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['target_arch=="arm"', {
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['target_arch=="arm"', {
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