Fix builds on x32 platform. #1152
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From the Debian wiki: https://wiki.debian.org/X32Port X32 is an ABI for amd64/x86_64 CPUs using 32-bit integers, longs and pointers. The idea is to combine the smaller memory and cache footprint from 32-bit data types with the larger register set of x86_64. The 64-bit registers can make computation more efficient, and with 8 additional registers available, there is less pressure compared to i386/i686. rapidjson makes an incorrect assumption in a check for 64 bit platforms, and uses __LP64__ exclusively. This fix adds an additional check for __x86_64__ && __ILP32__ defines, as a very conservative fix. However, the usage of __LP64__ would be a problem for other "mixed" applications like ARM ILP32, so a better detection scheme might be needed in the future.
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After discussing with @cuavas, I've duplicated this pull request with rapidjson upstream: |
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This fix has been applied upstream. Tencent/rapidjson@323a0dc |
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We've now synced upstream rapidjson, is this still necessary? |
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This has been merged, yes. a8ebc11#diff-ad70ca65ccd212456aaca0efb96cd072L253 |
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Great, thank you! |
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From the Debian wiki: https://wiki.debian.org/X32Port
X32 is an ABI for amd64/x86_64 CPUs using 32-bit integers, longs
and pointers. The idea is to combine the smaller memory and cache
footprint from 32-bit data types with the larger register set of
x86_64. The 64-bit registers can make computation more efficient,
and with 8 additional registers available, there is less pressure
compared to i386/i686.
rapidjson makes an incorrect assumption in a check for 64 bit platforms,
and uses LP64 exclusively. This fix adds an additional check for
x86_64 && ILP32 defines, as a very conservative fix. However, the
usage of LP64 would be a problem for other "mixed" applications like
ARM ILP32, so a better detection scheme might be needed in the future.