Add cmake support.

cmake/CMakeLists.txt

@@ -0,0 +1,72 @@
+cmake_minimum_required(VERSION 2.8)
+
+project(protobuf C CXX)
+
+option(BUILD_TESTING "Build tests" ON)
+option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
+if (MSVC)
+  option(ZLIB "Build with zlib support" OFF)
+endif (MSVC)
+
+find_package(Threads REQUIRED)
+if (CMAKE_USE_PTHREADS_INIT)
+  set(HAVE_PTHREAD 1)
+else (CMAKE_USE_PTHREADS_INIT)
+  set(HAVE_PTHREAD 0)
+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)
+  find_package(ZLIB)
+  if (ZLIB_FOUND)
+    set(HAVE_ZLIB 1)
+  else (ZLIB_FOUND)
+    set(HAVE_ZLIB 0)
+    # Explicitly set these to empty (override NOT_FOUND) so cmake doesn't
+    # complain when we use them later.
+    set(ZLIB_INCLUDE_DIRECTORIES)
+    set(ZLIB_LIBRARIES)
+  endif (ZLIB_FOUND)
+endif (MSVC)
+
+if (MSVC)
+  if (BUILD_SHARED_LIBS)
+    add_definitions(-DPROTOBUF_USE_DLLS)
+  endif (BUILD_SHARED_LIBS)
+  add_definitions(/wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
+endif (MSVC)
+
+include(find_hash_map.cmake)
+
+configure_file(config.h.in config.h)
+configure_file(pbconfig.h.in google/protobuf/stubs/pbconfig.h)
+
+get_filename_component(protobuf_source_dir ${protobuf_SOURCE_DIR} PATH)
+
+include_directories(
+  ${ZLIB_INCLUDE_DIRECTORIES}
+  ${protobuf_BINARY_DIR}
+  ${protobuf_source_dir}/src)
+
+if (MSVC)
+  # Add the "lib" prefix for generated .lib outputs.
+  set(LIB_PREFIX lib)
+else (MSVC)
+  # When building with "make", "lib" prefix will be added automatically by
+  # the build tool.
+  set(LIB_PREFIX)
+endif (MSVC)
+
+include(libprotobuf-lite.cmake)
+include(libprotobuf.cmake)
+include(libprotoc.cmake)
+if (BUILD_TESTING)
+  include(protoc.cmake)
+endif (BUILD_TESTING)

cmake/README.md

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+This directory contains cmake files that can be used to generate MSVC project
+files in order to build protobuf on windows. You need to have cmake installed
+on your computer before proceeding.
+
+Compiling and Installing
+========================
+
+1. Check whether a gtest directory exists in the upper level directory. If
+   you checkout the code from github via "git clone", this gtest directory
+   won't exist and you won't be able to build the tests described below. To
+   avoid this problem consider downloading one of the release tar balls which
+   contains gtest already and copying the gest directory from there to your
+   protobuf directory:
+
+        https://github.com/google/protobuf/releases
+
+2. Use cmake to generate MSVC project files. Running the following commands
+   in a command shell will generate project files for Visual Studio 2008 in
+   a sub-directory named "build".
+
+        $ cd path/to/protobuf/cmake
+        $ mkdir build
+        $ cd build
+        $ cmake -G "Visual Studio 9 2008" ..
+
+3. Open the generated protobuf.sln file in Microsoft Visual Studio.
+4. Choose "Debug" or "Release" configuration as desired.
+5. From the Build menu, choose "Build Solution".  Wait for compiling to finish.
+6. From a command shell, run tests.exe and lite-test.exe and check that all
+   tests pass. Make sure you have changed the working directory to the output
+   directory because tests.exe will try to find and run test_plugin.exe
+   in the working directory.
+7. Run extract_includes.bat to copy all the public headers into a separate
+   "include" directory (under the top-level package directory).
+8. Copy the contents of the include directory to wherever you want to put
+   headers.
+9. Copy protoc.exe wherever you put build tools (probably somewhere in your
+   PATH).
+10. Copy libprotobuf.lib, libprotobuf-lite.lib, and libprotoc.lib wherever you
+   put libraries.
+
+  To avoid conflicts between the MSVC debug and release runtime libraries, when
+  compiling a debug build of your application, you may need to link against a
+  debug build of libprotobuf.lib.  Similarly, release builds should link against
+  release libs.
+
+DLLs vs. static linking
+=======================
+
+Static linking is now the default for the Protocol Buffer libraries.  Due to
+issues with Win32's use of a separate heap for each DLL, as well as binary
+compatibility issues between different versions of MSVC's STL library, it is
+recommended that you use static linkage only.  However, it is possible to
+build libprotobuf and libprotoc as DLLs if you really want.  To do this,
+do the following:
+
+  1. Add an additional flag "-DBUILD_SHARED_LIBS=ON" when invoking cmake:
+
+        $ cmake -G "Visual Studio 9 2008" -DBUILD_SHARED_LIBS=ON ..
+
+  2. Follow the same steps as described in the above section.
+  3. When compiling your project, make sure to #define PROTOBUF_USE_DLLS.
+
+When distributing your software to end users, we strongly recommend that you
+do NOT install libprotobuf.dll or libprotoc.dll to any shared location.
+Instead, keep these libraries next to your binaries, in your application's
+own install directory.  C++ makes it very difficult to maintain binary
+compatibility between releases, so it is likely that future versions of these
+libraries will *not* be usable as drop-in replacements.
+
+If your project is itself a DLL intended for use by third-party software, we
+recommend that you do NOT expose protocol buffer objects in your library's
+public interface, and that you statically link protocol buffers into your
+library.
+
+ZLib support
+============
+
+If you want to include GzipInputStream and GzipOutputStream
+(google/protobuf/io/gzip_stream.h) in libprotobuf, you will need to do a few
+additional steps:
+
+1. Obtain a copy of the zlib library.  The pre-compiled DLL at zlib.net works.
+2. Make sure zlib's two headers are in your include path and that the .lib file
+   is in your library path.  You could place all three files directly into this
+   cmake directory to compile libprotobuf, but they need to be visible to
+   your own project as well, so you should probably just put them into the
+   VC shared icnlude and library directories.
+3. Add flag "-DZLIB=ON" when invoking cmake:
+
+        $ cmake -G "Visual Studio 9 2008" -DZLIB=ON ..
+
+   If it reports NOTFOUND for zlib_include or zlib_lib, you might haven't put
+   the headers or the .lib file in the right directory.
+4) Open the generated protobuf.sln file and build as usual.
+
+Notes on Compiler Warnings
+==========================
+
+The following warnings have been disabled while building the protobuf libraries
+and compiler.  You may have to disable some of them in your own project as
+well, or live with them.
+
+* C4018 - 'expression' : signed/unsigned mismatch
+* C4146 - unary minus operator applied to unsigned type, result still unsigned
+* C4244 - Conversion from 'type1' to 'type2', possible loss of data.
+* C4251 - 'identifier' : class 'type' needs to have dll-interface to be used by
+  clients of class 'type2'
+* C4267 - Conversion from 'size_t' to 'type', possible loss of data.
+* C4305 - 'identifier' : truncation from 'type1' to 'type2'
+* C4355 - 'this' : used in base member initializer list
+* C4800 - 'type' : forcing value to bool 'true' or 'false' (performance warning)
+* C4996 - 'function': was declared deprecated
+
+C4251 is of particular note, if you are compiling the Protocol Buffer library
+as a DLL (see previous section).  The protocol buffer library uses templates in
+its public interfaces.  MSVC does not provide any reasonable way to export
+template classes from a DLL.  However, in practice, it appears that exporting
+templates is not necessary anyway.  Since the complete definition of any
+template is available in the header files, anyone importing the DLL will just
+end up compiling instances of the templates into their own binary.  The
+Protocol Buffer implementation does not rely on static template members being
+unique, so there should be no problem with this, but MSVC prints warning
+nevertheless.  So, we disable it.  Unfortunately, this warning will also be
+produced when compiling code which merely uses protocol buffers, meaning you
+may have to disable it in your code too.
+

cmake/config.h.in

@@ -0,0 +1,4 @@
+#define GOOGLE_PROTOBUF_CMAKE_BUILD
+
+#define HAVE_PTHREAD ${HAVE_PTHREAD}
+#define HAVE_ZLIB ${HAVE_ZLIB}

cmake/find_hash_map.cmake

@@ -0,0 +1,119 @@
+include(CheckCXXSourceCompiles)
+
+function(find_hash_map)
+  set(HAVE_HASH_MAP 1 PARENT_SCOPE)
+  set(HAVE_HASH_SET 1 PARENT_SCOPE)
+  # Search for hash_map in the following order:
+  #  1. <unordered_map> ::std::unordered_map
+  #  2. <tr1/unordered_map> ::std::tr1::unordered_map
+  #  3. <hash_map> ::hash_map
+  #  4. <hash_map>  ::stdext::hash_map
+  #  5. <ext/hash_map> ::std::hash_map
+  #  6. <ext/hash_map> ::__gnu_cxx::hash_map
+  check_cxx_source_compiles("
+    #include <unordered_map>
+    int main() {  ::std::unordered_map<int, int> v; return v[0]; }
+  " HAS_STD_UNORDERED_MAP)
+  if (HAS_STD_UNORDERED_MAP)
+    set(HASH_NAMESPACE ::std PARENT_SCOPE)
+    set(HASH_MAP_H <unordered_map> PARENT_SCOPE)
+    set(HASH_MAP_CLASS unordered_map PARENT_SCOPE)
+    set(HASH_SET_H <unordered_set> PARENT_SCOPE)
+    set(HASH_SET_CLASS unordered_set PARENT_SCOPE)
+    return()
+  endif (HAS_STD_UNORDERED_MAP)
+
+  check_cxx_source_compiles("
+    #include <tr1/unordered_map>
+    int main() {  ::std::tr1::unordered_map<int, int> v; return v[0]; }
+  " HAS_STD_TR1_UNORDERED_MAP)
+  if (HAS_STD_TR1_UNORDERED_MAP)
+    set(HASH_NAMESPACE ::std::tr1 PARENT_SCOPE)
+    set(HASH_MAP_H <tr1/unordered_map> PARENT_SCOPE)
+    set(HASH_MAP_CLASS unordered_map PARENT_SCOPE)
+    set(HASH_SET_H <tr1/unordered_set> PARENT_SCOPE)
+    set(HASH_SET_CLASS unordered_set PARENT_SCOPE)
+    return()
+  endif (HAS_STD_TR1_UNORDERED_MAP)
+
+  check_cxx_source_compiles("
+    #include <hash_map>
+    int main() {  ::hash_map<int, int> v; return v[0]; }
+  " HAS_HASH_MAP)
+  if (HAS_HASH_MAP)
+    set(HASH_NAMESPACE :: PARENT_SCOPE)
+    set(HASH_MAP_H <hash_map> PARENT_SCOPE)
+    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
+    set(HASH_SET_H <hash_set> PARENT_SCOPE)
+    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
+    return()
+  endif (HAS_HASH_MAP)
+
+  check_cxx_source_compiles("
+    #include <hash_map>
+    int main() {  ::stdext::hash_map<int, int> v; return v[0]; }
+  " HAS_STDEXT_HASH_MAP)
+  if (HAS_STDEXT_HASH_MAP)
+    set(HASH_NAMESPACE ::stdext PARENT_SCOPE)
+    set(HASH_MAP_H <hash_map> PARENT_SCOPE)
+    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
+    set(HASH_SET_H <hash_set> PARENT_SCOPE)
+    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
+    return()
+  endif (HAS_STDEXT_HASH_MAP)
+
+  check_cxx_source_compiles("
+    #include <ext/hash_map>
+    int main() {  ::std::hash_map<int, int> v; return v[0]; }
+  " HAS_STD_HASH_MAP)
+  if (HAS_STD_HASH_MAP)
+    set(HASH_NAMESPACE ::std PARENT_SCOPE)
+    set(HASH_MAP_H <ext/hash_map> PARENT_SCOPE)
+    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
+    set(HASH_SET_H <ext/hash_set> PARENT_SCOPE)
+    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
+    return()
+  endif (HAS_STD_HASH_MAP)
+
+  check_cxx_source_compiles("
+    #include <ext/hash_map>
+    int main() {  ::__gnu_cxx::hash_map<int, int> v; return v[0]; }
+  " HAS_GNU_CXX_HASH_MAP)
+  if (HAS_GNU_CXX_HASH_MAP)
+    set(HASH_NAMESPACE ::gnu_cxx PARENT_SCOPE)
+    set(HASH_MAP_H <ext/hash_map> PARENT_SCOPE)
+    set(HASH_MAP_CLASS hash_map PARENT_SCOPE)
+    set(HASH_SET_H <ext/hash_set> PARENT_SCOPE)
+    set(HASH_SET_CLASS hash_set PARENT_SCOPE)
+    return()
+  endif (HAS_GNU_CXX_HASH_MAP)
+
+  set(HAVE_HASH_MAP 0 PARENT_SCOPE)
+  set(HAVE_HASH_SET 0 PARENT_SCOPE)
+endfunction()
+
+function(find_hash_compare)
+  if (MSVC)
+    check_cxx_source_compiles("
+      #include ${HASH_MAP_H}
+      int main() { ::std::hash_compare<int> cp; return cp(0); }
+    " HAS_STD_HASH_COMPARE)
+    if (HAS_STD_HASH_COMPARE)
+      set(HASH_COMPARE ::std::hash_compare PARENT_SCOPE)
+      return()
+    endif (HAS_STD_HASH_COMPARE)
+
+    check_cxx_source_compiles("
+      #include ${HASH_MAP_H}
+      int main() { ::stdext::hash_compare<int> cp; return cp(0); }
+    " HAS_STDEXT_HASH_COMPARE)
+    if (HAS_STDEXT_HASH_COMPARE)
+      set(HASH_COMPARE ::stdext::hash_compare PARENT_SCOPE)
+      return()
+    endif (HAS_STDEXT_HASH_COMPARE)
+  endif (MSVC)
+  set(HASH_COMPARE PARENT_SCOPE)
+endfunction()
+
+find_hash_map()
+find_hash_compare()

cmake/libprotobuf-lite.cmake

@@ -0,0 +1,23 @@
+set(libprotobuf_lite_files
+  ${protobuf_source_dir}/src/google/protobuf/arena.cc
+  ${protobuf_source_dir}/src/google/protobuf/arenastring.cc
+  ${protobuf_source_dir}/src/google/protobuf/extension_set.cc
+  ${protobuf_source_dir}/src/google/protobuf/generated_message_util.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/coded_stream.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream_impl_lite.cc
+  ${protobuf_source_dir}/src/google/protobuf/message_lite.cc
+  ${protobuf_source_dir}/src/google/protobuf/repeated_field.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/atomicops_internals_x86_gcc.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/atomicops_internals_x86_msvc.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/common.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/once.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/stringprintf.cc
+  ${protobuf_source_dir}/src/google/protobuf/wire_format_lite.cc
+)
+
+add_library(libprotobuf-lite ${libprotobuf_lite_files})
+target_link_libraries(libprotobuf-lite ${CMAKE_THREAD_LIBS_INIT})
+set_target_properties(libprotobuf-lite PROPERTIES
+    COMPILE_DEFINITIONS LIBPROTOBUF_EXPORTS
+    OUTPUT_NAME ${LIB_PREFIX}protobuf-lite)

cmake/libprotobuf.cmake

@@ -0,0 +1,42 @@
+set(libprotobuf_files
+  ${protobuf_source_dir}/src/google/protobuf/any.cc
+  ${protobuf_source_dir}/src/google/protobuf/any.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/api.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/compiler/importer.cc
+  ${protobuf_source_dir}/src/google/protobuf/compiler/parser.cc
+  ${protobuf_source_dir}/src/google/protobuf/descriptor.cc
+  ${protobuf_source_dir}/src/google/protobuf/descriptor.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/descriptor_database.cc
+  ${protobuf_source_dir}/src/google/protobuf/duration.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/dynamic_message.cc
+  ${protobuf_source_dir}/src/google/protobuf/empty.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/extension_set_heavy.cc
+  ${protobuf_source_dir}/src/google/protobuf/field_mask.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/generated_message_reflection.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/gzip_stream.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/printer.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/strtod.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/tokenizer.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream_impl.cc
+  ${protobuf_source_dir}/src/google/protobuf/map_field.cc
+  ${protobuf_source_dir}/src/google/protobuf/message.cc
+  ${protobuf_source_dir}/src/google/protobuf/reflection_ops.cc
+  ${protobuf_source_dir}/src/google/protobuf/service.cc
+  ${protobuf_source_dir}/src/google/protobuf/source_context.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/struct.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/structurally_valid.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/strutil.cc
+  ${protobuf_source_dir}/src/google/protobuf/stubs/substitute.cc
+  ${protobuf_source_dir}/src/google/protobuf/text_format.cc
+  ${protobuf_source_dir}/src/google/protobuf/timestamp.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/type.pb.cc
+  ${protobuf_source_dir}/src/google/protobuf/unknown_field_set.cc
+  ${protobuf_source_dir}/src/google/protobuf/wire_format.cc
+  ${protobuf_source_dir}/src/google/protobuf/wrappers.pb.cc
+)
+
+add_library(libprotobuf ${libprotobuf_lite_files} ${libprotobuf_files})
+target_link_libraries(libprotobuf ${CMAKE_THREAD_LIBS_INIT} ${ZLIB_LIBRARIES})
+set_target_properties(libprotobuf PROPERTIES
+    COMPILE_DEFINITIONS LIBPROTOBUF_EXPORTS
+    OUTPUT_NAME ${LIB_PREFIX}protobuf)