Bundle static libraries

2022-04-04 00:26:00 +02:00
parent da561f6164
commit 82559cb9a7
2 changed files with 99 additions and 0 deletions
--- a/bundle_static.cmake
+++ b/bundle_static.cmake
@@ -0,0 +1,93 @@
+# https://cristianadam.eu/20190501/bundling-together-static-libraries-with-cmake/
+function(bundle_static_library tgt_name bundled_tgt_name)
+  list(APPEND static_libs ${tgt_name})
+
+  function(_recursively_collect_dependencies input_target)
+    set(_input_link_libraries LINK_LIBRARIES)
+    get_target_property(_input_type ${input_target} TYPE)
+    if (${_input_type} STREQUAL "INTERFACE_LIBRARY")
+      set(_input_link_libraries INTERFACE_LINK_LIBRARIES)
+    endif()
+    get_target_property(public_dependencies ${input_target} ${_input_link_libraries})
+    foreach(dependency IN LISTS public_dependencies)
+      if(TARGET ${dependency})
+        get_target_property(alias ${dependency} ALIASED_TARGET)
+        if (TARGET ${alias})
+          set(dependency ${alias})
+        endif()
+        get_target_property(_type ${dependency} TYPE)
+        if (${_type} STREQUAL "STATIC_LIBRARY")
+          list(APPEND static_libs ${dependency})
+        endif()
+
+        get_property(library_already_added
+          GLOBAL PROPERTY _${tgt_name}_static_bundle_${dependency})
+        if (NOT library_already_added)
+          set_property(GLOBAL PROPERTY _${tgt_name}_static_bundle_${dependency} ON)
+          _recursively_collect_dependencies(${dependency})
+        endif()
+      endif()
+    endforeach()
+    set(static_libs ${static_libs} PARENT_SCOPE)
+  endfunction()
+
+  _recursively_collect_dependencies(${tgt_name})
+
+  list(REMOVE_DUPLICATES static_libs)
+
+  set(bundled_tgt_full_name 
+    ${CMAKE_BINARY_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${bundled_tgt_name}${CMAKE_STATIC_LIBRARY_SUFFIX})
+  
+  if (UNIX OR APPLE)
+    file(WRITE ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar.in
+      "CREATE ${bundled_tgt_full_name}\n" )
+        
+    foreach(tgt IN LISTS static_libs)
+      file(APPEND ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar.in
+        "ADDLIB $<TARGET_FILE:${tgt}>\n")
+    endforeach()
+    
+    file(APPEND ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar.in "SAVE\n")
+    file(APPEND ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar.in "END\n")
+
+    file(GENERATE
+      OUTPUT ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar
+      INPUT ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar.in)
+
+    set(ar_tool ${CMAKE_AR})
+    if (CMAKE_INTERPROCEDURAL_OPTIMIZATION)
+      set(ar_tool ${CMAKE_CXX_COMPILER_AR})
+    endif()
+
+    add_custom_command(
+      COMMAND ${ar_tool} -M < ${CMAKE_BINARY_DIR}/${bundled_tgt_name}.ar
+      OUTPUT ${bundled_tgt_full_name}
+      COMMENT "Bundling ${bundled_tgt_name}"
+      VERBATIM)
+  elseif(MSVC)
+    find_program(lib_tool lib)
+
+    foreach(tgt IN LISTS static_libs)
+      list(APPEND static_libs_full_names $<TARGET_FILE:${tgt}>)
+    endforeach()
+
+    add_custom_command(
+      COMMAND ${lib_tool} /NOLOGO /OUT:${bundled_tgt_full_name} ${static_libs_full_names}
+      OUTPUT ${bundled_tgt_full_name}
+      COMMENT "Bundling ${bundled_tgt_name}"
+      VERBATIM)
+  else()
+    message(FATAL_ERROR "Unknown bundle scenario!")
+  endif()
+
+  add_custom_target(bundling_target ALL DEPENDS ${bundled_tgt_full_name})
+  add_dependencies(bundling_target ${tgt_name})
+
+  add_library(${bundled_tgt_name} STATIC IMPORTED)
+  set_target_properties(${bundled_tgt_name} 
+    PROPERTIES 
+      IMPORTED_LOCATION ${bundled_tgt_full_name}
+      INTERFACE_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:${tgt_name},INTERFACE_INCLUDE_DIRECTORIES>)
+  add_dependencies(${bundled_tgt_name} bundling_target)
+
+endfunction()