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Add hybrid CRT link for Windows binaries #40890

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Add hybrid CRT link for Windows binaries #40890

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79bd708
Add hybrid CRT link for windows binaries
JohnMcPMS Jun 24, 2026
b793180
apply to all release variants
JohnMcPMS Jun 24, 2026
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11 changes: 11 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -328,6 +328,17 @@ if (${TARGET_PLATFORM} STREQUAL "x64")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /CETCOMPAT")
endif()

# Hybrid CRT: static-link the C++ runtime and STL (/MT|/MTd from CMAKE_MSVC_RUNTIME_LIBRARY),
# but dynamic-link the Universal CRT (ucrt.dll) which is an OS component on Windows 10+.
# This eliminates the VCRUNTIME/MSVCP redistributable dependency while avoiding the size
# cost of statically linking the UCRT. See https://aka.ms/hybridcrt for details.
foreach(config RELEASE RELWITHDEBINFO MINSIZEREL)
set(CMAKE_SHARED_LINKER_FLAGS_${config} "${CMAKE_SHARED_LINKER_FLAGS_${config}} /NODEFAULTLIB:libucrt.lib /defaultlib:ucrt.lib")
set(CMAKE_EXE_LINKER_FLAGS_${config} "${CMAKE_EXE_LINKER_FLAGS_${config}} /NODEFAULTLIB:libucrt.lib /defaultlib:ucrt.lib")
endforeach()
set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} /NODEFAULTLIB:libucrtd.lib /defaultlib:ucrtd.lib")
set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /NODEFAULTLIB:libucrtd.lib /defaultlib:ucrtd.lib")

# Common link libraries
link_directories(${WSLDEPS_SOURCE_DIR}/lib/)
set(COMMON_LINK_LIBRARIES
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