llvm-mirror/unittests/CMakeLists.txt
Tom Stellard fb33bc86b6 CMake: Make most target symbols hidden by default
Summary:
For builds with LLVM_BUILD_LLVM_DYLIB=ON and BUILD_SHARED_LIBS=OFF
this change makes all symbols in the target specific libraries hidden
by default.

A new macro called LLVM_EXTERNAL_VISIBILITY has been added to mark symbols in these
libraries public, which is mainly needed for the definitions of the
LLVMInitialize* functions.

This patch reduces the number of public symbols in libLLVM.so by about
25%.  This should improve load times for the dynamic library and also
make abi checker tools, like abidiff require less memory when analyzing
libLLVM.so

One side-effect of this change is that for builds with
LLVM_BUILD_LLVM_DYLIB=ON and LLVM_LINK_LLVM_DYLIB=ON some unittests that
access symbols that are no longer public will need to be statically linked.

Before and after public symbol counts (using gcc 8.2.1, ld.bfd 2.31.1):
nm before/libLLVM-9svn.so | grep ' [A-Zuvw] ' | wc -l
36221
nm after/libLLVM-9svn.so | grep ' [A-Zuvw] ' | wc -l
26278

Reviewers: chandlerc, beanz, mgorny, rnk, hans

Reviewed By: rnk, hans

Subscribers: merge_guards_bot, luismarques, smeenai, ldionne, lenary, s.egerton, pzheng, sameer.abuasal, MaskRay, wuzish, echristo, Jim, hiraditya, michaelplatings, chapuni, jholewinski, arsenm, dschuff, jyknight, dylanmckay, sdardis, nemanjai, jvesely, javed.absar, sbc100, jgravelle-google, aheejin, kbarton, fedor.sergeev, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, mgrang, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, kristina, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D54439
2020-01-14 19:46:52 -08:00

47 lines
1.4 KiB
CMake

add_custom_target(UnitTests)
set_target_properties(UnitTests PROPERTIES FOLDER "Tests")
function(add_llvm_unittest test_dirname)
add_unittest(UnitTests ${test_dirname} ${ARGN})
endfunction()
function(add_llvm_unittest_with_input_files test_dirname)
add_unittest_with_input_files(UnitTests ${test_dirname} ${ARGN})
endfunction()
# The target unittests may test APIs that aren't exported in libLLVM.so, so
# we need to always link against the static libraries.
function(add_llvm_target_unittest test_dir_name)
add_llvm_unittest(${test_dir_name} DISABLE_LLVM_LINK_LLVM_DYLIB ${ARGN})
endfunction()
add_subdirectory(ADT)
add_subdirectory(Analysis)
add_subdirectory(AsmParser)
add_subdirectory(BinaryFormat)
add_subdirectory(Bitcode)
add_subdirectory(Bitstream)
add_subdirectory(CodeGen)
add_subdirectory(DebugInfo)
add_subdirectory(Demangle)
add_subdirectory(ExecutionEngine)
add_subdirectory(Frontend)
add_subdirectory(FuzzMutate)
add_subdirectory(IR)
add_subdirectory(LineEditor)
add_subdirectory(Linker)
add_subdirectory(MC)
add_subdirectory(MI)
add_subdirectory(Object)
add_subdirectory(ObjectYAML)
add_subdirectory(Option)
add_subdirectory(Remarks)
add_subdirectory(Passes)
add_subdirectory(ProfileData)
add_subdirectory(Support)
add_subdirectory(TableGen)
add_subdirectory(Target)
add_subdirectory(TextAPI)
add_subdirectory(Transforms)
add_subdirectory(XRay)
add_subdirectory(tools)