Having a small issue with conflicting libraries while packaging an Unreal Engine 4.27 project.
My project contains this gRPC library from google and I followed these steps to build it with CMake and after include it in my Unreal Project.
In addition my project requires enabling PixelStreaming plugin. However it seems that this plugin imported another version of protobuf which, on packaging is conflicting with the one included in gRPC.
The error is the following:
libprotobuf.lib(coded_stream.obj) : error LNK2005: "public: __cdecl google::protobuf::io::CodedOutputStream::CodedOutputStream(class google::protobuf::io::ZeroCopyOutputStream *,bool)" (??0CodedOutputStream#io#protobuf#google##QEAA#PEAVZeroCopyOutputStream#123#_N#Z) already defined in webrtc.lib(coded_stream.obj)
appearing for different objs.
I came across similar issues as such but disabling gRPC is not a feasible solution for me.
Could anyone advise on how to "instruct" the built gRPC to use the existing protobuf library from Pixel Streaming plugin?
Which steps do I need to take to properly configure these conflicting libraries?
having the same issue with GCP libs.
This issue seems to be caused by an bad commit of Protobuf (3.16.0 the branch linked by GRPC doesn't build correctly it seems)
If you build a different branch of protobuf manualy and use -DgRPC_PROTOBUF_PROVIDER=package
option when building gRPC you should be able to get this to work.
Im working in an msys environment so not 1 to 1 but my commands for building both protobuf and grpc are.
//protobuff
C:/msys64/mingw64/bin/cmake.exe -H. -Bbuild-output -G "MinGW Makefiles" -DCMAKE_MAKE_PROGRAM=C:/msys64/mingw64/bin/mingw32-make.exe -DCMAKE_C_COMPILER=C:/msys64/mingw64/bin/gcc.exe -DCMAKE_CXX_COMPILER=C:/msys64/mingw64/bin/g++.exe -DCMAKE_INSTALL_MESSAGE=NEVER -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DCMAKE_CXX_STANDARD=17 -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_ABSL_PROVIDER=package
//gprc
C:/msys64/mingw64/bin/cmake.exe -H. -Bbuild-output -G "MinGW Makefiles" -DCMAKE_MAKE_PROGRAM=C:/msys64/mingw64/bin/mingw32-make.exe -DCMAKE_C_COMPILER=C:/msys64/mingw64/bin/gcc.exe -DCMAKE_CXX_COMPILER=C:/msys64/mingw64/bin/g++.exe -DCMAKE_INSTALL_MESSAGE=NEVER -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DCMAKE_CXX_STANDARD=17 -DgRPC_INSTALL=ON -DgRPC_BUILD_TESTS=OFF -DgRPC_ABSL_PROVIDER=package -DgRPC_CARES_PROVIDER=package -DgRPC_PROTOBUF_PROVIDER=package -DgRPC_RE2_PROVIDER=package -DgRPC_SSL_PROVIDER=package -DgRPC_ZLIB_PROVIDER=package
Building protobuf 3.20.x seemed to work for me (though having issues with absl further down the line)
What solved my issue was migrating to UE5.
Using the same steps with aforementioned grpc project, in UE5 new project. Having a libprotobuf.lib in ThirdPary folder within UE5 project the packaging process worked with no LINK conflicts. Not sure why UE packaging did not complain this time but what works, works!
Related
I'm using CLion with MinGW-GCC on the Windows-x64 platform - This is the background of the problem.
I was trying to install gtest before. But a lot of confusion arose in the middle.
First time I ran those commands(in googletest-release-1.12.1\) according to the instructions of googletest-release-1.12.1\googletest\README.md:
mkdir build
cd build
cmake ..
But I got error messages like:
CMake Error at CMakeLists.txt:51 (project):
Failed to run MSBuild command:
C:/Windows/Microsoft.NET/Framework/v4.0.30319/MSBuild.exe
to get the value of VCTargetsPath:
Then I changed my last command to
cmake -G "MinGW Makefiles" ..
because I use make provided by MinGW. I don't know whether it's right but, it ran properly.
then I called
make
make install
make ran smoothly. But when I ran make install, I got these messages:
Install the project...
-- Install configuration: ""
-- Installing: C:/Program Files (x86)/googletest-distribution/include
CMake Error at googlemock/cmake_install.cmake:41 (file):
file INSTALL cannot make directory "C:/Program Files
(x86)/googletest-distribution/include": No such file or directory.
Call Stack (most recent call first):
cmake_install.cmake:42 (include)
make: *** [Makefile:109: install] Error 1
I have no idea at all this time. So I changed my way. According to this answer, I copied the whole library into my project and edited CMakeLists.txt like this:
cmake_minimum_required(VERSION 3.23)
project(gtest_study)
set(CMAKE_CXX_STANDARD 20)
add_subdirectory(googletest-release-1.12.1)
include_directories(googletest-release-1.12.1/googletest/include)
include_directories(googletest-release-1.12.1/googlemock/include)
add_executable(gtest_study main.cpp)
target_link_libraries(gtest_study gtest gtest_main)
target_link_libraries(gtest_study gmock gmock_main)
So my questions are:
Is there any difference between the two which build it using make and cmake metioned firstly, and just use commands like include_directories and target_link_libraries in CMakeLists.txt? (maybe like .h and .dll file? Or just completely the same? I don't know)
When I use make install to install a library on Windows, what should I do in particular? Specify some directory (I don't know which one) or what?
Although in my system environment I use MinGW-makefile, in CLion which the libraries are eventually used, I use ninja as the generator for CMake (it just comes with CLion, not installed for the system). Do I have to specify it and how? （-G "Ninja"doesn't work in my native env）
The difference between
cmake ..
and
cmake -G "MinGW Makefiles" ..
Is the choice of generator: The former uses the default generator, the latter uses the generator you specified. (cmake --help should put a * next to the default generator.)
Based on the error message I assume this is a visual studio generator and you may not be able to run that one properly from within a MinGW terminal.
In the latter case the default install directory seems to be based on the target OS (Windows) but does not seem to incorporate the fact that you're running from a MinGW terminal where the default install path (C:/Program Files (x86)/googletest-distribution) is not valid.
You could try to fix this by providing it during cmake configuration (passing -D 'CMAKE_INSTALL_PREFIX=/c/Program Files (x86)/googletest-distribution' before the source dir) or by providing the install directory during the installation.
The following process should allow you to install the lib. I'm using my preferred way of building here, i.e. not using build system dependent commands, but using cmake to run the build/install commands. I assume the working directory to be the root directory of the gtest sources:
cmake -G "MinGW Makefiles" -S . -B build
cmake --build build
cmake --install build --prefix '/c/Program Files (x86)/googletest-distribution'
The last command needs to be run with admin privileges, the first 2 I don't recommend running as admin. You could instead install to a directory where you do have the permissions to create directories even without admin privileges.
The difference between using the process described above and using add_subdirectory is that the former results in a installation on the system which can be used via find_package and the google test libs won't be rebuilt for every project where you do this.
...
project(gtest_study)
...
# you may need to pass the install location via -D CMAKE_PREFIX_PATH=<install_location> during configuration for this to work
find_package(GTest REQUIRED)
target_link_libraries(gtest_study PRIVATE GTest::gtest_main GTest::gmock)
The latter builds the google test project as part of your own project build and for every project where you use this approach a seperate version of the google test libs is built. Note: there should be no need to specify the include dirs yourself, since this kind of information is attached to the cmake target and gets applied to the linking target automatically:
#include_directories(googletest-release-1.12.1/googletest/include)
#include_directories(googletest-release-1.12.1/googlemock/include)
add_executable(gtest_study main.cpp)
target_link_libraries(gtest_study PRIVATE gtest_main gmock)
As for 3.: The CMake generator used for building GTest should be independent of the generator of the project using it. The thing that's important is that the compilers used by the build systems are compatible. I cannot go into detail about this, since I've never used CLion and therefore have too little knowlege about the compilers used by it. (Personally I'm working with Visual Studio on Windows.)
I was trying to build SFML in order to start developing 2d-games in c++. I put the source-code directory inside C: (the directory itself is called 'SFML'). while trying to generate .cbp files using CMake, I ran into an error:
"The source directory "C:/SFML" does not appear to contain CMakeLists.txt"
It seems like there is a missing file that CMake didn't create.
I am using Cmake 3.10.1, the installation file can be found in https://cmake.org/download/ under the title:"Windows win32-x86 Installer".
I tried to build SFML 2.4.2, using the generator of Codeblocks - MinGW makefiles. The version of codeblocks used is: codeblocks-16.01mingw-setup.exe, found in http://www.codeblocks.org/downloads/26
Did someone encounter the same problem before and knows how to overcome it? If not -
Is there an already-built, ready to use, libray of this version? (2.4.2)
If not.. do you know about a version of SFML that is usable in visual studio 2017?
And another question (That is the last one, I promise...) - maybe you can recommend me about another library for c++, that is usable to develop 2d-games?
edt:
note: I am completely new to all this building thing
the containments of SFML:
maybe it's the binary version?
lib contains some static libraries, bin contains some .dll s
You probably downloaded something wrong or potentially extracted the SFML source into a sub folder or something like that.
Since you've mentioned Visual Studio: SFML is 100% compatible with Visual Studio and you can build it from source any time without having to worry about dependencies (everything included in the repository).
The steps to compile are pretty easy. I'd recommend you install Git to clone the latest source from the SFML repository. In addition you'll need CMake, which you obviously got already.
Open a Command Prompt and change your directory to C:\SFML.
Clone the official repository using Git: git clone https://github.com/SFML/SFML.git source (note the trailing .)
Wait for the source to be checked out to the source sub directory.
Create a new directory called build: md build && cd build
Now invoke CMake, pointing to the source directory and also defining your install path: cmake -DCMAKE_INSTALL_PREFIX=C:/SFML ../source
Build and install a debug build of SFML: cmake --build . --target install --config debug
Build and install a release build of SFML: cmake --build . --target install --config release
Alternatively you can just open the generated Visual Studio solution and build the INSTALL project on your own.
(You shouldn't have to define a build tool or anything; CMake should notice Visual Studio being installed and pick it up automatically.)
I have experienced this using cmake version 3.10 when using the -S command line option. On cmake version 3.15.4 it behaves as expected - so if you update cmake then it might just work.
Note that the -S command line option was not supported before version 3.13:
https://cmake.org/cmake/help/v3.13/release/3.13.html#command-line
Normally cmake is called from a "build" subdirectory of a project root, the project root contains CMakelists.txt. So you would create a "build" directory, change to it, and submit "cmake ..". This would pull in CMakelists.txt from the project root, and use the "build" subdirectory that you are in as the build directory. We say "build", what it actually does is generate makefiles which can then used by the "native" build system (e.g. "make" or Visual Studio) to perform the actual compilation and linking. This arrangement is not always convenient, hence the introduction of the -S and -B command line options.
CMake has a find_package() backed by a bunch of FindXYZ scripts (which you can also add to).
What mechanism, if any, is available to me to tell cmake: "Find this package, and if you haven't found it, download it and trigger its build" - with the downloading and building part also backed by per-package scripts or settings (so that downloading could be with wget or git clone, building could be with cmake or maven or a package-specific command, etc.) ?
Yeah, I was bitten by that Friday.
So, CMake has an ExternalProject directive, meant for exactly that, get/update if necessary, configure, build and install this and that external project. Awesome!
Sadly, CMake isn't that awesome.
You can't use the target defined by ExternalProject as a library in target_link_libraries. I've really tried to.
The basic problem is that the updating, building and installation of the external project happens at build time, whereas CMake insists on only using libraries that it found during pre-build (i.e. during the CMake run); you can't re-detect stuff while running make/ninja/msvc… .
You can define a custom target, tell it where the .so you'd want to link against later will be, and try to coerce CMake into believing you without checking at pre-build. Sadly, at least in the CMake versions I had, that broke dependency tracking, so that it simply didn't build the external library, because nothing needed it.
From the error messages you get when trying to use an external project in target_link_library, it seems CMake assumes you'd only want to install tools you need at build time that way, not libraries. A bummer.
You can roll your own version of download-on-demand using execute_process() (which runs on the CMake configure step) with ${CMAKE_COMMAND} as the command invoked on a CMakeLists.txt containing ExternalProject_Add().
You could even either configure_file() the CMakeLists.txt to fill out custom variables or dynamically create the CMakeLists.txt file.
I am trying to build PoDoFo Library on my Windows Platform (for use as an API). It is done using CMake. The ReadMe file says the following. Unfortunately I am new to CMake and I can't make out much from it.
Building PoDoFo on Windows
CMake 2.6.x is required for Windows. You can download it from
cmake.org .
On Windows, PoDoFo may be built as either a shared or static library.
Building both is not supported. By default only the shared library
will be built. If you want a static library, just disable generation
of the shared library with the extra argument to cmake:
-DPODOFO_BUILD_SHARED=FALSE
Handling library naming on win32
Especially on Windows it is also common for custom built libraries to
have different names to those you might download as pre-built copies.
CMake won't be able to find them if they're called something else
unless you tell it. Use these variables to tell CMake what names to
look for a library under:
•FREETYPE_LIBRARY_NAMES_DEBUG, FREETYPE_LIBRARY_NAMES_RELEASE and FREETYPE_LIBRARY_NAMES
•TIFF_LIBRARY_NAMES_DEBUG, TIFF_LIBRARY_NAMES_RELEASE and TIFF_LIBRARY_NAMES
•LIBJPEG_LIBRARY_NAMES_DEBUG, LIBJPEG_LIBRARY_NAMES_RELEASE and LIBJPEG_LIBRARY_NAMES
•ZLIB_LIBRARY_NAMES_DEBUG, ZLIB_LIBRARY_NAMES_RELEASE,ZLIB_LIBRARY_NAMES
CMake builds on Windows with MinGW
Once MinGW is set up, make sure that the MinGW "bin" directory is on
your PATH, and be sure to set CMAKE_INCLUDE_PATH and
CMAKE_LIBRARY_PATH such that CMake can find the headers and .lib files
for the libraries PoDoFo requires. The GnuWin32 library packages from
http://gnuwin32.sf.net/ are known to work with PoDoFo, so installing
zlib, freetype, and libjpeg from there should do the trick.
To configure and build PoDoFo with a default GnuWin32 install and with
MinGW already on your PATH:
md ..\podofo-debug
cd ..\podofo-debug
cmake -G "MinGW Makefiles" ..\podofo-src -DCMAKE_INCLUDE_PATH=c:\progra~1\gnuwin32\include -DCMAKE_LIBRARY_PATH=c:\progra~1\gnuwin32\lib -DPODOFO_BUILD_SHARED:BOOL=FALSE mingw32-make
I have installed CMake and downloaded the other libraries mentioned like freetype, zlib, libjpeg. Their header and binary files are in their respective folders.
Now what should DCMAKE_INCLUDE_PATH and DCMAKE_LIBRARY_PATH be? Also what is "MinGW Makefiles"? Do I have to supply any extra parameters?
I'll be grateful if someone can explain in simple steps how I can go about it.
EDIT: error while executing CMAKE:
-- Ensure you cppunit installed version is at least 1.12.0
Cppunit not found. No unit tests will be built.
CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindPack
ageHandleStandardArgs.cmake:97 (message):
Could NOT find FREETYPE (missing: FREETYPE_LIBRARY FREETYPE_INCLUDE_DIR)
Call Stack (most recent call first):
C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/FindPackageHandleStan
dardArgs.cmake:291 (_FPHSA_FAILURE_MESSAGE)
cmake/modules/FindFREETYPE.cmake:75 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:372 (FIND_PACKAGE)
To build PoDoFo you need installed GnuWin32, CMake, MinGW32 and PoDoFo sources
download GetGnuWin32
install to c:\getgnuwin32
open cmd.exe
cd c:\getgnuwin32
download.bat
install.bat
Then as suggested in #ibizaman answer
cmake -G "MinGW Makefiles" -DCMAKE_INCLUDE_PATH="C:\gnuwin32\include" -DCMAKE_LIBRARY_PATH="C:\gnuwin32\lib" -DPODOFO_BUILD_STATIC=TRUE ..
FreeType should be installed with GnuWin32 packages
If you followed all the instructions, to compile it should normally be enough to do:
cd <podofo root directory (where CMakeLists.txt is)>
mkdir build
cd build
cmake -G "MinGW Makefiles" -DCMAKE_INCLUDE_PATH=<path to headers> -DCMAKE_LIBRARY_PATH=<path to libraries> -DPODOFO_BUILD_SHARED:BOOL=FALSE ..
mingw32-make
Step by step:
First, go to the directory where your podofo sources are. You should see a CMakeLists.txt file lying around.
Second (and third), create (and go into) a directory where the compilation will be done. I call it build but it can be any name. This is a best practice since you can simply delete the build directory and come back to a clean state.
Fourth, ask cmake to create the makefile(s) for mingw:
Specify the PODOFO_BUILD_SHARED like advertised in the manual: build shared or static version.
CMAKE_INCLUDE_PATH and CMAKE_LIBRAY_PATH are used to reference to the packages needed to build podofo. If you downloaded the precompiled packages like you did since you have de headers and the binaries, then you need to give to cmake the path to those headers and binaries. You can specify the variables multiple times if needed, e.g.:
cmake -G "MinGW Makefiles" -DCMAKE_INCLUDE_PATH=/path/to/freetype/include -DCMAKE_LIBRARY_PATH=/path/to/freetype/lib -DCMAKE_INCLUDE_PATH=/path/to/zlib/include -DCMAKE_LIBRARY_PATH=/path/to/zlib/lib -DPODOFO_BUILD_SHARED:BOOL=FALSE ..
The "MinGW Makefiles" tells cmake to create makefiles specific to mingw. Else, by default on windows, it creates makefiles specific to Microsoft Visual Studio.
Finaly reference the CMakeLists.txt in the parent directory with .. at the end.
Last, but not least, compile with the mingw version of make.
/usr/bin/ld: cannot find -lOpenGLSupport
The above error occurs when linking.
I have googled, to no avail.
Where can I obtain this library (package / build from source)?
(If this question is more at home/ appropriate on superuser.com, mods feel free to move it)
Thanks!
OS is Ubuntu Karmic.
-lOpenGLSupport appears to be from the bulletphysics library.
More details:
I had built this from source, however, had not specified that it should build shared libraries. Doing this appears to have rectified the problem.
For future reference:
Build bulletphysics using these commands
cmake -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=RelWithDebugInfo . -G "Unix Makefiles"
make
(answering own question)