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Fixed msvc 2019 nmake noexcept build.

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By default cmake generates cxx_flags with /EHsc parameter.
I updated CMAKE_CXX_FLAGS string and removed /EHsc, also I added compile defenitions _HAS_EXCEPTIONS=0, it is mandatory for noexcept build with MSVC STL implementation.
Output files became smaller.

How to reproduce:

Visual Studio 2019 x64 command port

mkdir build-msvc2019
cd build-msvc2019
cmake -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_LIBDIR=install ..
nmake

CXX FLAGS BEFORE:

-- CMAKE_C_FLAGS:   /DWIN32 /D_WINDOWS /W3
-- CMAKE_CXX_FLAGS: /DWIN32 /D_WINDOWS /W3 /GR- /EHsc
-- CMAKE_CXX_FLAGS_DEBUG:   /MDd /Zi /Ob0 /Od /RTC1
-- CMAKE_CXX_FLAGS_RELEASE: /MD /O2 /Ob2 /DNDEBUG
-- ENABLE_RTTI:       OFF
-- ENABLE_EXCEPTIONS: OFF

OUTPUT SIZE BEFORE:

Build folder size: 61,8 MB (64 808 580 bytes)

GLSLANG SIZE BEFORE:

glslang.lib 22,7 MB (23 887 150 bytes)

CXX FLAGS AFTER:

-- CMAKE_C_FLAGS:   /DWIN32 /D_WINDOWS /W3
-- CMAKE_CXX_FLAGS: /DWIN32 /D_WINDOWS /W3 /GR-
-- CMAKE_CXX_FLAGS_DEBUG:   /MDd /Zi /Ob0 /Od /RTC1
-- CMAKE_CXX_FLAGS_RELEASE: /MD /O2 /Ob2 /DNDEBUG
-- ENABLE_RTTI:       OFF
-- ENABLE_EXCEPTIONS: OFF

OUTPUT SIZE AFTER:

Build folder size: 58,4 MB (61 331 179 bytes)

GLSLANG SIZE AFTER:

glslang.lib 21,6 MB (22 655 252 bytes)
This commit is contained in:
Evgeny Proydakov 2020-06-24 20:01:18 +03:00
parent 2e99822c14
commit 5f7228e785
1 changed files with 3 additions and 0 deletions
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3
CMakeLists.txt
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@ -193,6 +193,9 @@ elseif(MSVC)
endif()
if(ENABLE_EXCEPTIONS)
add_compile_options(/EHsc) # Enable Exceptions
else()
string(REGEX REPLACE /EHsc "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS}) # Try to remove default /EHsc cxx_flag
add_compile_definitions(_HAS_EXCEPTIONS=0)
endif()
endif()