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cmake: Enable full optimizations for RelWithDebInfo MSVC builds 

Adds compiler flag:
/Ob2 (automatic inline expansion)

And linker flags:
/OPT:ICF (identical COMDAT folding)

Ref: https://gitlab.kitware.com/cmake/cmake/-/issues/20812
master
Richard Stanway 2021-06-23 20:53:35 +02:00 committed by Jim
parent c1deaf9c3f
commit a82bb12848
1 changed files with 5 additions and 1 deletions
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6
CMakeLists.txt
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@ -175,6 +175,10 @@ if(MSVC)
set(CMAKE_C_FLAGS_DEBUG "/DDEBUG=1 /D_DEBUG=1 ${CMAKE_C_FLAGS_DEBUG}")
set(CMAKE_CXX_FLAGS_DEBUG "/DDEBUG=1 /D_DEBUG=1 ${CMAKE_C_FLAGS_DEBUG}")
# https://gitlab.kitware.com/cmake/cmake/-/issues/20812
set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} /Ob2")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /Ob2")
if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /SAFESEH:NO")
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} /SAFESEH:NO")
@ -184,7 +188,7 @@ if(MSVC)
foreach(t EXE SHARED MODULE)
set(CMAKE_${t}_LINKER_FLAGS "${CMAKE_${t}_LINKER_FLAGS} /OPT:REF")
set(CMAKE_${t}_LINKER_FLAGS_DEBUG "${CMAKE_${t}_LINKER_FLAGS_DEBUG} /INCREMENTAL:NO")
set(CMAKE_${t}_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_${t}_LINKER_FLAGS_RELWITHDEBINFO} /INCREMENTAL:NO")
set(CMAKE_${t}_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_${t}_LINKER_FLAGS_RELWITHDEBINFO} /INCREMENTAL:NO /OPT:ICF")
endforeach()
else()
if(MINGW)