I'm writing a CPython extension using Jetbrain's CLion IDE and I was hoping to get code-completion working for functions and variables inside of Python.h.
I looked through the preferences and I can't find anything relevant. How do I add code completion and inspection for included libraries?
CLion uses the CMakeLists.txt in your project to control the lookup paths for code completion and other features -- because your library includes are build specific, it makes sense in a way to put this here.
To the specific question of how to get the Python.h library signatures into autocomplete, your CMakeList file should have something like the following:
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -I/usr/local/Cellar/python3/3.4.3/Frameworks/Python.framework/Versions/3.4/include/python3.4m")
Where -I/path/to/file.h is the local path to the directory that contains the header files that you want to include in your build (and by proxy, your autocomplete lookup for the project).
Related
GCC allows for having command-line options passed by a file by #file syntax. Using this the file should be added as prerequisite (aka dependency) to the target.
I'm not finding any reference in CMake docs about argument files, suggesting it's not supported. Or perhaps just takes a little bit more plumbing, e.g. cat file|xargs? Or some way telling CMake explicitly that the file is a prerequisite? I mean "Prerequisite" according to GNU Make terminology. If file contents change I have to rebuild. AKA dependency.
Which is it? And how does it work?
You should just be able to use target_compile_options() or CXX_<LANG>_FLAGS like you normally would.
Since the flags available for different compilers are usually different, you probably will have one for each compiler you support, in which case you can wrap your target_compile_options() calls with if() blocks based on CMAKE_CXX_COMPILER_ID or the MSVC variable, or use the CXX_COMPILER_ID or X_COMPILER_ID generator expressions to use the right file (if you have multiple files for multiple compilers) for the right compiler.
However, I've also noticed before when trying this that using file flags like this doesn't automatically add the file as a dependency to the target (the CMake won't add a rule for the target to rebuild if that file changes), so you might need to do that manually like this:
# wrap this in a function taking `target` as an argument.
get_target_property(sources ${target} SOURCES)
set_property(SOURCE ${sources}
# DIRECTORY "${PROJECT_SOURCE_DIR}" "${PROJECT_BINARY_DIR}"
TARGET_DIRECTORY ${target}
APPEND PROPERTY OBJECT_DEPENDS "${PROJECT_SOURCE_DIR}/path/to/flags/file.txt"
)
The above snippet courtesy of a user in this GitHub issue. It uses the OBJECT_DEPENDS source file property to make every source file of a target depend on the compiler options file. I (and the author of that code snippet) would classify it as a workaround, since it only works for Generators that support OBJECT_DEPENDS. From the CMake docs:
Specifies a semicolon-separated list of full-paths to files on which any object files compiled from this source file depend. On Makefile Generators and the Ninja generator an object file will be recompiled if any of the named files is newer than it. Visual Studio Generators and the Xcode generator cannot implement such compilation dependencies.
I'm not sure at what level of the toolchain it would be best to request that such automatic dependency-tracking functionality be added. According some of the Ninja buildsystem maintainers in the above linked GitHub issue, (if my noob brain is understanding the words they're saying correctly :P), it's something that could be handled by compilers when they generate depfiles given a compile comand for a source file. I'm currently too scared to ask compiler maintainers if that's the case. If you're interested in digging onto the part that CMake plays in orchestrating other tools to get dependency tracking for things like header files and the creation of dependency-tracking files ("depfiles"), you can go to your CMake installation's Modules folder and grep for CMAKE_DEPFILE_FLAGS_. Then use "find in files" at https://github.dev/Kitware/CMake.
Notes: Visual Studio / MSVC's compiler calls these "command files", gcc doesn't seem to have a particular name for them, and clang calls these "configuration files". They all support similar #file syntax. I'm not sure what the history is with that, but many compilers aim to have levels of compatibility (similar interface to) with GCC.
That's all. If you're bored and want to read a bit about how CMake does header dependency detection (which is loosely related here on the topic of depfiles), see this other post of mine.
I am trying to build Quantlib using Boost Libraries.
I followed the instructions here: and also on the Quantlib website.
I downloaded and unzipped boost_1_57_0 into C:\program files
I then used the Visual Studio 2013 x64 Native prompt to go to the boost directory and ran
bootstrap.bat
and then
b2 --toolset=msvc --build-type=complete architecture=x86 address-model=64 stage
Then I opened Quantlib_vc12.sln in Visual Studio 2013.
Picked "Release" and "x64", opened "Quantlib" in Property Manager and set the VC++ Directories.
In the include directories I added C:\Programm Files\boost_1_57_0
In the Library Directories I added C:\Program Files\boost_1_57_0\stage\lib
Then I went to the Solution Explorer and right clicked and chose build.
I got one LNK1104 error.
LNK1104: cannot open file 'libboost_unit_test_framework-vc120-mt-1_57.lib
Please see attached screenshot:
I have no idea how to fix this and I would really appreciate some help. I had successfully installed this at work using an admin account but was not able to access Quantlib using my user account. I have since deleted and attempted installations atleast 15 times but it's not working. I am worried that all these attempts at installing may have messed something else up, like some registry (I have no idea how that works but I only know to be afraid). Please help! Thanks.
UPDATE: Still get the same error after adding BOOST_AUTO_LINK_NOMANGLE define to project.
UPDATE2: I am getting these messages on the screen while running b2 to build boost. Is this an error I need to fix?
This is exactly what I warned you about in another related question/answer. What's happening here is that the boost headers you are including in this quantlib are (through macros) detecting that you're using MSVC, detecting the version, then automatically linking the required DLL files to build quantlib using #pragma comment(lib....). So even though under Project Settings -> C/C++ -> Linker there are no external DLL's or Lib's specified, they're still being linked by these pragma statements.
So when these macros are detecting your compiler and so on, they're dynamically building a string name of what they think the required libraries would be named on your system. Remember when you built boost, you specified the -layout option. This the naming layout of your boost libraries. Well by default, that layout is something like this:
LIB_LIBRARY_NAME_COMPILER_VERSION_SingleOrMultiThreaded_BOOST_VERSION.LIB
Which in practice looks like this:
libboost_unit_test_framework-vc120-mt-1_57.lib
This is boost "mangling" the name of your library to be as descriptive as possible about how the libraries were build so that, just by glancing at the file name, you know. What we do with -layout=system is tell the boost build system NOT to mangle the names, but to name them according to what option we gave to "layout". Since we chose layout=system, boost is going to name our libraries like this:
LIB_LIBRARY_NAME.LIB
Which in practice will produce:
libboost_unit_test_framework.lib
So when we start using boost after doing this (with MSVC only does this happen), these dynamically generated linker statements don't give a rip about or know about what -layout option you built boost with. They will attempt to link in required libraries using the fully mangled naming format, which is why you get the error:
cannot open file 'libboost_unit_test_framework-vc120-mt-1_57.lib
.. because you don't have a file named that! That's the mangled name! You have a file named libboost_unit_test_framework.lib. See the difference! So, you need to tell these stupid macros to stop mangling the library names when auto-linking required libraries. You do that by adding the following preprocessor definition to your Quantlib project:
BOOST_AUTO_LINK_NOMANGLE
You add that in Project Settings -> C/C++ -> Preprocessor -> Preprocessor definitions.
If you'd rather avoid this headache and don't care about the long and (imo ugly) mangling that boost does to library names, you can build boost omitting the -layout option and it will default to this mangled naming convention, where you shouldn't get stuck on this error at all anymore. I personally put out the effort to keep nice short/clean library names but it's all about preference.
Edit
Since you have the same error after fixing the NO_MANGLE problem, then the only possible reason that you're getting this particular link error is that you do not have whatever file the linker is complaining about missing stored in any of the directories supplied to the linker.
Verify the folders/paths you provide to the linker and verify that the file the linker is looking for is in one of the directories that you're providing to the linker. You have to provide directories to the linker because you're telling the linker "you can look in all of these places for the libraries my project needs". If you specify none, it's got nowhere to look. :(
Example:
I'm trying to link the shared library of boost thread into my application.
System: Windows8
IDE: Visual Studio 2010
I build the boost library using:
b2 --with-thread --build-type=complete link=shared
I can see the
boost_thread-vc100-mt-gd-1_55.dll
boost_thread-vc100-mt-gd-1_55.lib
and other file inside the stage/lib directory
I've added the path to Additional Library Directories and Input in linker option as:
Additional Library Directories: C:/boost_1_55_0_dyn/stage/lib
Input: C:\boost_1_55_0_dyn\stage\lib\boost_thread-vc100-mt-gd-1_55.lib
I don't know why on the earth Visual Studio is looking for libboost_thread-vc100-mt-gd-1_55.lib. I haven't mentioned the libboost_thread-vc100-mt-gd-1_55.lib anywhere in the properties or any place. I even search all my files and folders inside the project, libboost_thread-vc100-mt-gd-1_55.lib is not mentioned anywhere.
Well I forgot to put BOOST_ALL_DYN_LINK in preprocessor definition. If the BOOST_ALL_DYN_LINK is not defined, boost looks for static library, that is why its looking for libboost_thread-vc100-mt-gd-1_55.lib
This is additional information to the answer Pritesh already posted, but I'm new here so I can't comment.
It boils down to compatibility between your VS project settings and the way the boost libraries were built. It gets a little tricky because boost and VS do some autolinking for you. Check out the file …\Include\boost\config\Auto_link.hpp. It explains the algorithms and macros that will cause libraries that you didn't explicitly include to show up in your project.
For example, BOOST_ALL_DYN_LINK is used to help determine if the boost library name should have "lib" pre-pended to the name during autolink.
Additionally ,
If you are using cmake and qibuild you can try this :
It automatically links with the corresponding libraries and make their headers available.
qi_use_lib(yourProgramName your libraries)
like this:
qi_use_lib(getimages ALCOMMON ALPROXIES ALVISION OPENCV2_CORE OPENCV2_HIGHGUI OPENCV2_IMGPROC)
I working with Firebreath 1.7, MacOSX 10.8.3, Xcode 4.6.3.
I want add boost::chrono as static library to my plugin.
After running prepmac.sh i have my_plugin bundle target. I choose my_plugin target in project/targets tab and don't see option "Link binary With Libraries".
How i can add boost::chrono library to my_plugin by another method?
Changing things manually there is not the correct way to do it; you should never change the project files without changing the cmake files, because eventually you'll need to rerun the prep script.
First of all, are you using system boost? boost::chrono is not part of the boost that firebreath includes, which is a subset of the boost features to keep size down for those who don't want to deal with it. If you are using part firebreath boost and part your own, you could have problems.
If you've configured system boost correctly, you should be able to just add this to the end of your PluginConfig.cmake file and rerun the prep script:
add_boost_library(chrono)
Barring that, you could also just do it using cmake directly, which would mean adding a target_link_libraries command to your CMakeLists.txt or Mac/projectDef.cmake file at the end, something like:
target_link_libraries(${PROJECT_NAME} boost_chrono)
(you'd need to find out for sure what the library name is; you might even need to use find_library to locate it).
we're building a cross-platform utility which must have a small footprint. We've been pulling header files from boost as and when we need them but now we must link against some boost C++ thread code. The easiest immediate solution was to create our own custom library using CMake's "add_library" command to create a static library composed of some boost thread source files. These compile without any problems.
The difficulty arises when I try to link to this library from an executable. Visual Studio 2008 returns an error saying that it cannot link to "libboost_thread-vc90-mt-sgd-1_40.lib". What really puzzles me is that I've grepped through all the source code and CMake config files and I can't find any reference to this libboost library, leading me to think that this has been autogenerated in some way.
This works OK in Linux, can anyone point out why I'm experiencing these issues in Windows?
#Gearoid
You found the correct reason for your problem, but not the correct solution. The BOOST_AUTO_LINK_NOMANGLE is an internal, i.e. for library authors, definition to control the auto-linking. The user level definition is BOOST_ALL_NO_LIB which when defined disables the auto-linking feature for all Boost Libraries code you use. This is described in the user.hpp configuration header (see user.hpp near the bottom and the Boost Config documentation). You can also control this on a per library level as describe in that header.
Ok, well, it turns out that Boost uses this auto-link feature for Visual Studio which embeds references to a mangled (ie, platform-compiler-mult-threaded, etc) boost library name.
The header file which controls this is called "auto_link.hpp" which lives in the config directory of the boost include tree. There's a special preprocessor definition called "BOOST_AUTO_LINK_NOMANGLE" which toggles this behaviour.
Another triumph of mediocrity for Microsoft.