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Silence unknown link language warnings.

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Fixes https://github.com/google/draco/issues/162
This commit is contained in:
Ondrej Stava 2017-08-02 15:17:59 -07:00
parent 10af829784
commit d0f313d292
2 changed files with 32 additions and 0 deletions
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12
CMakeLists.txt
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@ -6,6 +6,7 @@ set(draco_src_root "${draco_root}/src/draco")
set(draco_build_dir "${CMAKE_BINARY_DIR}")
include("${draco_root}/cmake/compiler_flags.cmake")
include("${draco_root}/cmake/util.cmake")
# Draco requires C++11 support.
require_cxx_flag_nomsvc("-std=c++11" YES)
@ -760,6 +761,11 @@ else ()
$<TARGET_OBJECTS:draco_points_dec>
$<TARGET_OBJECTS:draco_points_enc>)
set(draco_header_only_targets
draco_compression_attributes_pred_schemes_dec
draco_dec_config
draco_enc_config)
if (BUILD_SHARED_LIBS)
set_target_properties(dracodec PROPERTIES SOVERSION 1)
set_target_properties(dracoenc PROPERTIES SOVERSION 1)
@ -832,4 +838,10 @@ else ()
"${CMAKE_INSTALL_PREFIX}/bin")
install(FILES "${draco_root}/cmake/FindDraco.cmake"
DESTINATION "${CMAKE_INSTALL_PREFIX}/include/draco/cmake")
# Some generators complain about unknown link language for header only
# targets. Silence the harmless warnings/errors with some dummy source files.
foreach (target ${draco_header_only_targets})
add_dummy_source_file_to_target("${target}" "cc")
endforeach ()
endif ()

20
cmake/util.cmake Normal file
View File

@ -0,0 +1,20 @@
if (NOT DRACO_CMAKE_UTIL_CMAKE_)
set(DRACO_CMAKE_UTIL_CMAKE_ 1)
function (create_dummy_source_file basename extension out_file_path)
set(dummy_source_file "${draco_build_dir}/${basename}.${extension}")
file(WRITE "${dummy_source_file}"
"// Generated file. DO NOT EDIT!\n"
"// ${target_name} needs a ${extension} file to force link language, \n"
"// or to silence a harmless CMake warning: Ignore me.\n"
"void ${target_name}_dummy_function(void) {}\n")
set(${out_file_path} ${dummy_source_file} PARENT_SCOPE)
endfunction ()
function (add_dummy_source_file_to_target target_name extension)
create_dummy_source_file("${target_name}" "${extension}" "dummy_source_file")
target_sources(${target_name} PRIVATE ${dummy_source_file})
endfunction ()
endif() # DRACO_CMAKE_UTIL_CMAKE_