build-scripts/MSVC.cmake

#[=======================================================================[

MSVC
----

Toolchain file for Microsoft Visual C++.

Used by CMakePresets.json -> "toolchainFile".

C++ flags used by all builds:

/MP     cl.exe build with multiple processes
/utf-8  set source and execution character sets to UTF-8
/bigobj increase # of sections in object files
/sdl-   disable additional security checks
/FC     full path in compiler messages
/Gd     __cdecl
/GS-    disable buffer security checks
/Gy     Enable Function-Level Linking
/GF     Eliminate Duplicate Strings
/wd4068 unknown pragma
/wd4146 negate unsigned
/wd4819 codepage?
/wd6237 short-circuit eval
/wd6319 a, b: unused a
/wd26444 unnamed objects
/wd26451 overflow
/wd26495 uninitialized member
/WX- (do not) Treat Warnings as Errors
/W1  Warning Level
/TP  every file is a C++ file
/Zc:forScope  Force Conformance in for Loop Scope
/Zc:inline    Remove unreferenced COMDAT
/Zc:wchar_t   wchar_t Is Native Type

Additional C++ flags used by RelWithDebInfo builds:

/Ob1 Inline Function Expansion (1 = only when marked as such)
/Oi  Generate Intrinsic Functions

Linker flags used by all builds:

/OPT:REF  remove unreferenced COMDATs
/OPT:ICF  folds identical COMDATs
/DYNAMICBASE  does this app really need ASLR ?
/NXCOMPAT     same as above
No need to force /TLBID:1 because is default

#]=======================================================================]

# Path has changed, so this configure run will find cl.exe
set(CMAKE_C_COMPILER   cl.exe)
set(CMAKE_CXX_COMPILER ${CMAKE_C_COMPILER})
set(CMAKE_CXX_FLAGS_INIT "\
/MP /utf-8 /bigobj /sdl- /FC /Gd /GS- /Gy /GF \
/wd4068 /wd4146 /wd4819 /wd6237 /wd6319 /wd26444 /wd26451 /wd26495 /WX- /W1 \
/TP /Zc:forScope /Zc:inline /Zc:wchar_t"
)
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT
"/Oi"
)
add_compile_definitions(
    _SCL_SECURE_NO_WARNINGS
    _CRT_SECURE_NO_WARNINGS
    WIN32_LEAN_AND_MEAN
    LOCALIZE
    USE_VCPKG
)
add_link_options(
    /OPT:REF
    /OPT:ICF
    /LTCG:OFF
    /MANIFEST:NO
    /INCREMENTAL:NO
    /DYNAMICBASE
    /NXCOMPAT
)

set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded")

# Where is vcpkg.json ?
set(VCPKG_MANIFEST_DIR ${CMAKE_SOURCE_DIR}/msvc-full-features)

set(VCPKG_ROOT "" CACHE PATH "Path to VCPKG installation")
if (NOT $ENV{VCPKG_ROOT} STREQUAL "")
    include($ENV{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake)
elseif(NOT $CACHE{VCPKG_ROOT} STREQUAL "")
    include($CACHE{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake)
endif()