Merge pull request #783 from podsvirov/topic-cmake-project

Improved CMake project

5 files changed, 108 insertions, 52 deletions

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 33e069fe..9de6341a 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -4,39 +4,65 @@ cmake_minimum_required(VERSION 2.8)
 # Project
 project(protobuf C CXX)
 
+# CMake policies
+cmake_policy(SET CMP0022 NEW)
+
 # Options
-option(BUILD_TESTING "Build tests" ON)
-option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
+option(protobuf_VERBOSE "Enable for verbose output" OFF)
+option(protobuf_BUILD_TESTS "Build tests" ON)
+if (BUILD_SHARED_LIBS)
+  set(protobuf_BUILD_SHARED_LIBS_DEFAULT ON)
+else (BUILD_SHARED_LIBS)
+  set(protobuf_BUILD_SHARED_LIBS_DEFAULT OFF)
+endif (BUILD_SHARED_LIBS)
+option(protobuf_BUILD_SHARED_LIBS "Build Shared Libraries" ${protobuf_BUILD_SHARED_LIBS_DEFAULT})
+option(protobuf_MSVC_STATIC_RUNTIME "Link static runtime libraries" ON)
 if (MSVC)
-  option(ZLIB "Build with zlib support" OFF)
+  set(protobuf_WITH_ZLIB_DEFAULT OFF)
+else (MSVC)
+  set(protobuf_WITH_ZLIB_DEFAULT ON)
 endif (MSVC)
+option(protobuf_WITH_ZLIB "Build with zlib support" ${protobuf_WITH_ZLIB_DEFAULT})
+set(protobuf_DEBUG_POSTFIX "d"
+  CACHE STRING "Default debug postfix")
 
 # Path to main configure script
 set(protobuf_CONFIGURE_SCRIPT "../configure.ac")
 
-# Parse version from configure script
-file(STRINGS "${protobuf_CONFIGURE_SCRIPT}" protobuf_VERSION_LINE
-  LIMIT_COUNT 1
-  REGEX "^AC_INIT")
-# Replace special characters
-string(REPLACE "(" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
-string(REPLACE ")" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
-string(REPLACE "[" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
-string(REPLACE "]" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
-# Parse version string
-string(REGEX REPLACE "^AC_INIT__Protocol Buffers_,_([^_]+).*$" "\\1"
-    protobuf_VERSION_STRING "${protobuf_VERSION_LINE}")
+# Parse configure script
+set(protobuf_AC_INIT_REGEX
+  "^AC_INIT\\(\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\]\\)$")
+file(STRINGS "${protobuf_CONFIGURE_SCRIPT}" protobuf_AC_INIT_LINE
+  LIMIT_COUNT 1 REGEX "^AC_INIT")
+# Description
+string(REGEX REPLACE        "${protobuf_AC_INIT_REGEX}" "\\1"
+    protobuf_DESCRIPTION    "${protobuf_AC_INIT_LINE}")
+# Version
+string(REGEX REPLACE        "${protobuf_AC_INIT_REGEX}" "\\2"
+    protobuf_VERSION_STRING "${protobuf_AC_INIT_LINE}")
+# Contact
+string(REGEX REPLACE        "${protobuf_AC_INIT_REGEX}" "\\3"
+    protobuf_CONTACT        "${protobuf_AC_INIT_LINE}")
 # Parse version tweaks
-string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$" "\\1"
+set(protobuf_VERSION_REGEX "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$")
+string(REGEX REPLACE     "${protobuf_VERSION_REGEX}" "\\1"
   protobuf_VERSION_MAJOR "${protobuf_VERSION_STRING}")
-string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$" "\\2"
+string(REGEX REPLACE     "${protobuf_VERSION_REGEX}" "\\2"
   protobuf_VERSION_MINOR "${protobuf_VERSION_STRING}")
-string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$" "\\3"
+string(REGEX REPLACE     "${protobuf_VERSION_REGEX}" "\\3"
   protobuf_VERSION_PATCH "${protobuf_VERSION_STRING}")
 # Package version
 set(protobuf_VERSION
   "${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
 
+if(protobuf_VERBOSE)
+  message(STATUS "Configuration script parsing status [")
+  message(STATUS "  Description : ${protobuf_DESCRIPTION}")
+  message(STATUS "  Version     : ${protobuf_VERSION} (${protobuf_VERSION_STRING})")
+  message(STATUS "  Contact     : ${protobuf_CONTACT}")
+  message(STATUS "]")
+endif()
+
 add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD)
 
 find_package(Threads REQUIRED)
@@ -44,18 +70,17 @@ if (CMAKE_USE_PTHREADS_INIT)
   add_definitions(-DHAVE_PTHREAD)
 endif (CMAKE_USE_PTHREADS_INIT)
 
-if (MSVC)
-  if (ZLIB)
-    set(HAVE_ZLIB 1)
-    find_path(ZLIB_INCLUDE_DIRECTORIES zlib.h ${protobuf_SOURCE_DIR})
-    find_library(ZLIB_LIBRARIES zdll ${protobuf_SOURCE_DIR})
-  else (ZLIB)
-    set(HAVE_ZLIB 0)
-  endif (ZLIB)
-else (MSVC)
+if (protobuf_WITH_ZLIB)
   find_package(ZLIB)
   if (ZLIB_FOUND)
     set(HAVE_ZLIB 1)
+    # FindZLIB module define ZLIB_INCLUDE_DIRS variable
+    # Set ZLIB_INCLUDE_DIRECTORIES for compatible
+    set(ZLIB_INCLUDE_DIRECTORIES ${ZLIB_INCLUDE_DIRECTORIES} ${ZLIB_INCLUDE_DIRS})
+    # Using imported target if exists
+    if (TARGET ZLIB::ZLIB)
+      set(ZLIB_LIBRARIES ZLIB::ZLIB)
+    endif (TARGET ZLIB::ZLIB)
   else (ZLIB_FOUND)
     set(HAVE_ZLIB 0)
     # Explicitly set these to empty (override NOT_FOUND) so cmake doesn't
@@ -63,21 +88,22 @@ else (MSVC)
     set(ZLIB_INCLUDE_DIRECTORIES)
     set(ZLIB_LIBRARIES)
   endif (ZLIB_FOUND)
-endif (MSVC)
+endif (protobuf_WITH_ZLIB)
 
 if (HAVE_ZLIB)
   add_definitions(-DHAVE_ZLIB)
 endif (HAVE_ZLIB)
 
-if (MSVC)
-  if (BUILD_SHARED_LIBS)
-    add_definitions(-DPROTOBUF_USE_DLLS)
-  else (BUILD_SHARED_LIBS)
-    # In case we are building static libraries, link also the runtime library statically
-	# so that MSVCR*.DLL is not required at runtime.
-    # https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
-    # This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd
-    # http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
+if (protobuf_BUILD_SHARED_LIBS)
+  set(protobuf_SHARED_OR_STATIC "SHARED")
+else (protobuf_BUILD_SHARED_LIBS)
+  set(protobuf_SHARED_OR_STATIC "STATIC")
+  # In case we are building static libraries, link also the runtime library statically
+  # so that MSVCR*.DLL is not required at runtime.
+  # https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
+  # This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd
+  # http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
+  if (MSVC AND protobuf_MSVC_STATIC_RUNTIME)
     foreach(flag_var
         CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
         CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
@@ -85,11 +111,11 @@ if (MSVC)
         string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
       endif(${flag_var} MATCHES "/MD")
     endforeach(flag_var)
-  endif (BUILD_SHARED_LIBS)
-  add_definitions(/wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
-endif (MSVC)
+  endif (MSVC AND protobuf_MSVC_STATIC_RUNTIME)
+endif (protobuf_BUILD_SHARED_LIBS)
 
 if (MSVC)
+  add_definitions(/wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
   string(REPLACE "/" "\\" PROTOBUF_SOURCE_WIN32_PATH ${protobuf_SOURCE_DIR})
   string(REPLACE "/" "\\" PROTOBUF_BINARY_WIN32_PATH ${protobuf_BINARY_DIR})
   configure_file(extract_includes.bat.in extract_includes.bat)
@@ -116,8 +142,8 @@ include(libprotobuf.cmake)
 include(libprotoc.cmake)
 include(protoc.cmake)
 
-if (BUILD_TESTING)
+if (protobuf_BUILD_TESTS)
   include(tests.cmake)
-endif (BUILD_TESTING)
+endif (protobuf_BUILD_TESTS)
 
 include(install.cmake)
diff --git a/cmake/libprotobuf-lite.cmake b/cmake/libprotobuf-lite.cmake
index 9fafc316..036b0517 100644
--- a/cmake/libprotobuf-lite.cmake
+++ b/cmake/libprotobuf-lite.cmake
@@ -24,9 +24,15 @@ set(libprotobuf_lite_files
   ${protobuf_source_dir}/src/google/protobuf/wire_format_lite.cc
 )
 
-add_library(libprotobuf-lite ${libprotobuf_lite_files})
+add_library(libprotobuf-lite ${protobuf_SHARED_OR_STATIC}
+  ${libprotobuf_lite_files})
 target_link_libraries(libprotobuf-lite ${CMAKE_THREAD_LIBS_INIT})
 target_include_directories(libprotobuf-lite PUBLIC ${protobuf_source_dir}/src)
+if(MSVC AND protobuf_BUILD_SHARED_LIBS)
+  target_compile_definitions(libprotobuf-lite
+    PUBLIC  PROTOBUF_USE_DLLS
+    PRIVATE LIBPROTOBUF_EXPORTS)
+endif()
 set_target_properties(libprotobuf-lite PROPERTIES
-    COMPILE_DEFINITIONS LIBPROTOBUF_EXPORTS
-    OUTPUT_NAME ${LIB_PREFIX}protobuf-lite)
+    OUTPUT_NAME ${LIB_PREFIX}protobuf-lite
+    DEBUG_POSTFIX "${protobuf_DEBUG_POSTFIX}")
diff --git a/cmake/libprotobuf.cmake b/cmake/libprotobuf.cmake
index 64a9cae0..a6ee8f2e 100644
--- a/cmake/libprotobuf.cmake
+++ b/cmake/libprotobuf.cmake
@@ -53,9 +53,15 @@ set(libprotobuf_files
   ${protobuf_source_dir}/src/google/protobuf/wrappers.pb.cc
 )
 
-add_library(libprotobuf ${libprotobuf_lite_files} ${libprotobuf_files})
+add_library(libprotobuf ${protobuf_SHARED_OR_STATIC}
+  ${libprotobuf_lite_files} ${libprotobuf_files})
 target_link_libraries(libprotobuf ${CMAKE_THREAD_LIBS_INIT} ${ZLIB_LIBRARIES})
 target_include_directories(libprotobuf PUBLIC ${protobuf_source_dir}/src)
+if(MSVC AND protobuf_BUILD_SHARED_LIBS)
+  target_compile_definitions(libprotobuf
+    PUBLIC  PROTOBUF_USE_DLLS
+    PRIVATE LIBPROTOBUF_EXPORTS)
+endif()
 set_target_properties(libprotobuf PROPERTIES
-    COMPILE_DEFINITIONS LIBPROTOBUF_EXPORTS
-    OUTPUT_NAME ${LIB_PREFIX}protobuf)
+    OUTPUT_NAME ${LIB_PREFIX}protobuf
+    DEBUG_POSTFIX "${protobuf_DEBUG_POSTFIX}")
diff --git a/cmake/libprotoc.cmake b/cmake/libprotoc.cmake
index 35e5faf2..1ee87b43 100644
--- a/cmake/libprotoc.cmake
+++ b/cmake/libprotoc.cmake
@@ -90,8 +90,15 @@ set(libprotoc_files
   ${protobuf_source_dir}/src/google/protobuf/compiler/zip_writer.cc
 )
 
-add_library(libprotoc ${libprotoc_files})
+add_library(libprotoc ${protobuf_SHARED_OR_STATIC}
+  ${libprotoc_files})
 target_link_libraries(libprotoc libprotobuf)
+if(MSVC AND protobuf_BUILD_SHARED_LIBS)
+  target_compile_definitions(libprotoc
+    PUBLIC  PROTOBUF_USE_DLLS
+    PRIVATE LIBPROTOC_EXPORTS)
+endif()
 set_target_properties(libprotoc PROPERTIES
     COMPILE_DEFINITIONS LIBPROTOC_EXPORTS
-    OUTPUT_NAME ${LIB_PREFIX}protoc)
+    OUTPUT_NAME ${LIB_PREFIX}protoc
+    DEBUG_POSTFIX "${protobuf_DEBUG_POSTFIX}")
diff --git a/cmake/tests.cmake b/cmake/tests.cmake
index 65feca21..06d98860 100644
--- a/cmake/tests.cmake
+++ b/cmake/tests.cmake
@@ -2,6 +2,9 @@ if (NOT EXISTS "${PROJECT_SOURCE_DIR}/../gmock/CMakeLists.txt")
   message(FATAL_ERROR "Cannot find gmock directory.")
 endif()
 
+option(protobuf_ABSOLUTE_TEST_PLUGIN_PATH
+  "Using absolute test_plugin path in tests" ON)
+
 include_directories(
   ${protobuf_source_dir}/gmock
   ${protobuf_source_dir}/gmock/gtest
@@ -96,6 +99,8 @@ set(common_test_files
   ${protobuf_source_dir}/src/google/protobuf/test_util.cc
   ${protobuf_source_dir}/src/google/protobuf/testing/file.cc
   ${protobuf_source_dir}/src/google/protobuf/testing/googletest.cc
+  ${protobuf_source_dir}/src/google/protobuf/compiler/mock_code_generator.cc
+  ${protobuf_source_dir}/src/google/protobuf/util/internal/type_info_test_helper.cc
 )
 
 set(common_lite_test_files
@@ -116,7 +121,6 @@ set(tests_files
   ${protobuf_source_dir}/src/google/protobuf/compiler/importer_unittest.cc
   ${protobuf_source_dir}/src/google/protobuf/compiler/java/java_doc_comment_unittest.cc
   ${protobuf_source_dir}/src/google/protobuf/compiler/java/java_plugin_unittest.cc
-  ${protobuf_source_dir}/src/google/protobuf/compiler/mock_code_generator.cc
   ${protobuf_source_dir}/src/google/protobuf/compiler/objectivec/objectivec_helpers_unittest.cc
   ${protobuf_source_dir}/src/google/protobuf/compiler/parser_unittest.cc
   ${protobuf_source_dir}/src/google/protobuf/compiler/python/python_plugin_unittest.cc
@@ -162,7 +166,6 @@ set(tests_files
   ${protobuf_source_dir}/src/google/protobuf/util/internal/json_stream_parser_test.cc
   ${protobuf_source_dir}/src/google/protobuf/util/internal/protostream_objectsource_test.cc
   ${protobuf_source_dir}/src/google/protobuf/util/internal/protostream_objectwriter_test.cc
-  ${protobuf_source_dir}/src/google/protobuf/util/internal/type_info_test_helper.cc
   ${protobuf_source_dir}/src/google/protobuf/util/json_util_test.cc
   ${protobuf_source_dir}/src/google/protobuf/util/time_util_test.cc
   ${protobuf_source_dir}/src/google/protobuf/util/type_resolver_util_test.cc
@@ -170,6 +173,10 @@ set(tests_files
   ${protobuf_source_dir}/src/google/protobuf/wire_format_unittest.cc
 )
 
+if(protobuf_ABSOLUTE_TEST_PLUGIN_PATH)
+  add_compile_options(-DGOOGLE_PROTOBUF_TEST_PLUGIN_PATH="$<TARGET_FILE:test_plugin>")
+endif()
+
 add_executable(tests ${tests_files} ${common_test_files} ${tests_proto_files} ${lite_test_proto_files})
 target_link_libraries(tests libprotoc libprotobuf gmock_main)
 
@@ -194,3 +201,7 @@ set(lite_arena_test_files
 )
 add_executable(lite-arena-test ${lite_arena_test_files} ${common_lite_test_files} ${lite_test_proto_files})
 target_link_libraries(lite-arena-test libprotobuf-lite gmock_main)
+
+add_custom_target(check
+  COMMAND tests
+  WORKING_DIRECTORY ${protobuf_source_dir})