WIP: bisect MSVC error #1151
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WIP: bisect MSVC error #1151
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MSVC doesn't properly report __cplusplus by default to keep compatibility with broken legacy code: - https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
- split compiler builtins and code that can be considered as architeture intrinsics - group compiler-specific code
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This introduces the USE_ARCH_INTRINSICS CMake option. It is enabled by default. Disabling it is meant to disable custom asm code and usage of intrinsincs functions for the target platform in the Dæmon code base, it may also be used by games built with the Dæmon common code base. It is not meant to disable asm or intrinsincs usage in third-party libraries. It is not meant to prevent the compiler to use such intrinsics in its optimization passes. It is not meant to disable the compiler flags we set to tell the compiler to try to use such intrinsics in its optimization passes. For this, one should disable USE_CPU_RECOMMENDED_FEATURES instead. For obvious reason the asm code in the BREAKPOINT() implementation is not meant to be disabled by USE_ARCH_INTRINSICS. The macro syntax is: DAEMON_ARCH_INTRINSICS_(architecture)[_extension] Examples: - DAEMON_ARCH_INTRINSICS_i686: i686 specific code, including asm code. - DAEMON_ARCH_INTRINSICS_i686_sse: i686 SSE specific code. - DAEMON_ARCH_INTRINSICS_i686_sse2: i686 SSE2 specific code. If a platform inherits feature from an parent platform, the parent platform name is used. For example on amd64, the definition enabling SSE code is DAEMON_ARCH_INTRINSICS_i686_sse, enabling SSE code on both i686 with SSE and amd64 platforms. and both DAEMON_ARCH_INTRINSICS_amd64 and DAEMON_ARCH_INTRINSICS_i686 are available.
This introduces USE_COMPILER_BUILTINS CMake option. It is enabled by default. Disabling it is meant to test the unknown compiler code.
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I'm just using this PR to trigger appveyor build and bisect an MSVC compilation error.