Difference between revisions of "Porting/Macros"
(C/C++ preprocessor macros for PPC64 porting) |
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<pre>__PPC__, __powerpc__, __PPC64__ and __powerpc64__</pre> [https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/rs6000/linux64.h;h=98b7255c95f1b55ec5c97726cfcb9dc6fb9ebf56;hb=HEAD#l293 gcc/config/rs6000/linux64.h] | <pre>__PPC__, __powerpc__, __PPC64__ and __powerpc64__</pre> [https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/rs6000/linux64.h;h=98b7255c95f1b55ec5c97726cfcb9dc6fb9ebf56;hb=HEAD#l293 gcc/config/rs6000/linux64.h] | ||
| − | Example from Debian ppc64le | + | ''Example from Debian ppc64le package: libtbb-dev, version 2020.3-1, /usr/include/tbb/machine/gcc_arm.h:'' |
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<pre> | <pre> | ||
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</pre> | </pre> | ||
| − | ''Example from GCC/libstdc++-v3 source code:'' | + | ''Example from GCC/libstdc++-v3 source code: libstdc++-v3/src/c++17/fast_float/fast_float.h'' |
<pre> | <pre> | ||
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That refers to "ppc64le" variants, but those are not canonical. It's better to check endianess separately. | That refers to "ppc64le" variants, but those are not canonical. It's better to check endianess separately. | ||
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| + | [[Category:Ports]] | ||
Latest revision as of 10:54, 14 September 2023
Some projects have been ported to Apple ppc64. In that case, they may test macros like this:
#if defined(__ppc64__) #endif
GCC does not define __ppc64__ (lowercase). It defines __PPC64__ (uppercase). To make the above code also build on Debian ppc64le or ppc64 (big endian) change the above code to:
#if defined(__ppc64__) || defined(__PPC64__) #endif
Details discussed on #talos-workstation:
Apple's gcc (4.0.1) in MacOS 10.5, ppc32 headers define:
__POWERPC__ and __ppc__
with -m64, the following are defined:
__POWERPC__, __ppc__, and __ppc64__
GCC compiling for the Linux kernel defines, for ppc32:
__PPC__ and __powerpc__
and for ppc64:
__PPC__, __powerpc__, __PPC64__ and __powerpc64__
Example from Debian ppc64le package: libtbb-dev, version 2020.3-1, /usr/include/tbb/machine/gcc_arm.h:
#if __powerpc64__ || __ppc64__
// IBM XL documents __powerpc64__ (and __PPC64__).
// Apple documents __ppc64__ (with __ppc__ only on 32-bit).
#define __TBB_WORDSIZE 8
#else
#define __TBB_WORDSIZE 4
#endif
Example from GCC/libstdc++-v3 source code: libstdc++-v3/src/c++17/fast_float/fast_float.h
[...] || (defined(__ppc64__) || defined(__PPC64__) || defined(__ppc64le__) || defined(__PPC64LE__)) )
That refers to "ppc64le" variants, but those are not canonical. It's better to check endianess separately.
