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Suppress linker warning 4221 for MSVC

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Some #define switches cause the body of entire files to be omitted. This
causes a linker warning on Visual Studio 2017, for example

    warning LNK4221: This object file does not define any previously
    undefined public symbols, so it will not be used by any link
    operation that consumes this library

Since this is warning us about something that shouldn't be
earth-shattering news, we add a linker flag to suppress this warning on
MSVC builds.
This commit is contained in:
Tim Ebringer 2017-05-20 14:22:29 -04:00
parent 92339a4d9d
commit 293a18257a
1 changed files with 3 additions and 0 deletions
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3
CMakeLists.txt
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@ -741,6 +741,9 @@ if (BUILD_STATIC)
endif()
if (MSVC)
# Suppress linker warnings caused by #ifdef omission
# of file content.
set( CMAKE_STATIC_LINKER_FLAGS /ignore:4221 )
if (BUILD_SHARED)
add_library (libzmq SHARED ${sources} ${public_headers} ${html-docs} ${readme-docs} ${CMAKE_CURRENT_BINARY_DIR}/NSIS.template.in)
target_link_libraries (libzmq ${OPTIONAL_LIBRARIES})