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CMake: Enable VS parallel builds for a good reduction in compile times 

This enables the /MP compiler flag, which parallelizes builds of by
distributing compilation of individual object files across workes
processes, instead of being limited to per-project parallelism.

Reduces the time for a full compile from 72 s to 45 s on my machine.
This commit is contained in:
Yuri Kunde Schlesner 2015-01-09 12:42:35 -02:00
parent d46f650036
commit f983d955f9
1 changed files with 2 additions and 1 deletions
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3
CMakeLists.txt
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@ -17,6 +17,7 @@ else()
# As far as I can tell, there's no way to override the CMake defaults while leaving user
# changes intact, so we'll just clobber everything and say sorry.
message(STATUS "Cache compiler flags ignored, please edit CMakeFiles.txt to change the flags.")
# /MP - Multi-threaded compilation
# /MD - Multi-threaded runtime
# /Ox - Full optimization
# /Oi - Use intrinsic functions
@ -24,7 +25,7 @@ else()
# /GR- - Disable RTTI
# /GS- - No stack buffer overflow checks
# /EHsc - C++-only exception handling semantics
set(optimization_flags "/MD /Ox /Oi /Oy- /DNDEBUG /GR- /GS- /EHsc")
set(optimization_flags "/MP /MD /Ox /Oi /Oy- /DNDEBUG /GR- /GS- /EHsc")
# /Zi - Output debugging information
# /Zo - enahnced debug info for optimized builds
set(CMAKE_C_FLAGS_RELEASE "${optimization_flags} /Zi" CACHE STRING "" FORCE)