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CMake: Disable ENABLE_EXPORTS for executables with MSVC

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The MSVC linker won't produce a .lib file for an executable that doesn't
export anything, and LLVM doesn't maintain dllexport annotations or .def
files listing all C++ symbols. It also doesn't support exporting all
symbols, like binutils ld.

CMake 3.2 changed the Ninja generator to list both the .exe and .lib
files as outputs of executable build targets. Ninja would always re-link
executables with ENABLE_EXPORTS because the .lib output file was not
present, and therefore the target was out of date.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232662 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner 2015-03-18 20:09:13 +00:00
parent 325aa050d5
commit 85ab1e7fe7
8 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
CMakeLists.txt
View File

@ -557,7 +557,7 @@ if( ${CMAKE_SYSTEM_NAME} MATCHES SunOS )
endif( ${CMAKE_SYSTEM_NAME} MATCHES SunOS )
# Make sure we don't get -rdynamic in every binary. For those that need it,
# use set_target_properties(target PROPERTIES ENABLE_EXPORTS 1)
# use export_executable_symbols(target).
set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
include(AddLLVM)

6
cmake/modules/AddLLVM.cmake
View File

@ -490,6 +490,12 @@ macro(add_llvm_executable name)
endif( LLVM_COMMON_DEPENDS )
endmacro(add_llvm_executable name)
function(export_executable_symbols target)
if (NOT MSVC) # MSVC's linker doesn't support exporting all symbols.
set_target_properties(${target} PROPERTIES ENABLE_EXPORTS 1)
endif()
endfunction()
set (LLVM_TOOLCHAIN_TOOLS
llvm-ar

2
examples/ExceptionDemo/CMakeLists.txt
View File

@ -15,4 +15,4 @@ add_llvm_example(ExceptionDemo
ExceptionDemo.cpp
)
set_target_properties(ExceptionDemo PROPERTIES ENABLE_EXPORTS 1)
export_executable_symbols(ExceptionDemo)

2
tools/bugpoint/CMakeLists.txt
View File

@ -31,7 +31,7 @@ add_llvm_tool(bugpoint
ToolRunner.cpp
bugpoint.cpp
)
set_target_properties(bugpoint PROPERTIES ENABLE_EXPORTS 1)
export_executable_symbols(bugpoint)
if(WITH_POLLY AND LINK_POLLY_INTO_TOOLS)
target_link_libraries(bugpoint Polly)

2
tools/llc/CMakeLists.txt
View File

@ -17,4 +17,4 @@ set(LLVM_NO_DEAD_STRIP 1)
add_llvm_tool(llc
llc.cpp
)
set_target_properties(llc PROPERTIES ENABLE_EXPORTS 1)
export_executable_symbols(llc)

2
tools/lli/CMakeLists.txt
View File

@ -39,4 +39,4 @@ add_llvm_tool(lli
RemoteTarget.cpp
RemoteTargetExternal.cpp
)
set_target_properties(lli PROPERTIES ENABLE_EXPORTS 1)
export_executable_symbols(llvm-stress)

2
tools/llvm-stress/CMakeLists.txt
View File

@ -7,4 +7,4 @@ set(LLVM_LINK_COMPONENTS
add_llvm_tool(llvm-stress
llvm-stress.cpp
)
set_target_properties(llvm-stress PROPERTIES ENABLE_EXPORTS 1)
export_executable_symbols(llvm-stress)

2
tools/opt/CMakeLists.txt
View File

@ -31,7 +31,7 @@ add_llvm_tool(opt
PrintSCC.cpp
opt.cpp
)
set_target_properties(opt PROPERTIES ENABLE_EXPORTS 1)
export_executable_symbols(opt)
if(WITH_POLLY AND LINK_POLLY_INTO_TOOLS)
target_link_libraries(opt Polly)