I can compile a sample C++ Code (including OpenCV) using both CMake and following command line:
g++ cv.cpp -o cvapp pkg-config --cflags --libs opencv
But I want to use CodeLite IDE for this purpose. I have added
/usr/include/opencv;/usr/include/opencv2
in the Include Paths under compiler tab in project settings. And added
/usr/local/lib
in Libraries Search Path under Linker tab.
But still, I am getting errors shown in this screenshot for a sample code.
Now is it possible to use CodeLite for OpenCV coding environment? If yes then how?
To use opencv in codelite the simplest option is to continue using pkg-config, you can do this as follows:
Right click on the project name and select settings...
2.Open the following dialog and select the Linker tab, in that window add pkg-config --cflags --libs opencv in linker-options:
Press the apply button and Ok and then compile the project.
Related
I use Code::Blocks IDE with wxWidgets in Debian 8.9 Jessie (x86-64).
When I use the GNU GCC Compiler everything works fine thus compiling nice wxWidgets executable for Linux.
But I need to have my program working on Windows platforms so I have to do cross-compiling.
I have installed mingw32 and followed the cross-compiling instructions given
here.
I did my wxWidgets build configuration as follows:
./configure prefix=/usr/i686-w64-mingw32 --host=i686-w64-mingw32 --enable-unicode --build=`./config.guess` --disable-shared
This is so because the MinGW compiler I have is i686-w64-mingw32, located in the folder /usr/i686-w64-mingw32, and wxWidgets version is 3.1.
My compiler set-up in Code::Blocks should be correct because I managed to do cross-compiling for simple console applications and those run properly on Windows 10.0. But when it comes to wxWidgets applications there are several problems:
The compiler gives me the error (it happens when --static is added to Other compiler options in the build options for the project):
fatal error: wx/app.h: No such file or directory|
Now since wx directory in question is in the path /usr/i686-w64-mingw32/include/wx-3.1 I added this path to the search directories for the project (the build target only for the moment). This worked fine to proceed further.
My compiler settings are: wx-config --host=i686-w64-mingw32 --static --cflags
The compiler swears again (not surprised though :-)):
fatal error: wx/setup.h: No such file or directory|
Ok I've found this one in /usr/i686-w64-mingw32/lib/wx/include/i686-w64-mingw32-msw-unicode-static-3.1, so added this path to the compiler search directories.
The linker is swearing this time (creeping on my nerves):
for the build target:
undefined reference to `wxEntry(HINSTANCE__*, HINSTANCE__*, char*, int)'|
for the release target:
undefined reference to `wxAppConsoleBase::CheckBuildOptions(char const*, char const*)'|
My linker settings are wx-config --host=i686-w64-mingw32 --static --libs
I tried hard to fix this with several different build options for the wxWidgets library but with no effect on the result. So please, someone help!
I also noticed that running ./config.guess form the wxWidgets download directory gives me x86_64-unknown-linux-gnu. Thus this mean I should use x86_64-w64-mingw32 (I have this one installed in /usr/x86_64-w64-mingw32) compiler instead i686-w64-mingw32?
So the main issue is that the command wx-config --static --cflags is not recognized in Other compiler options and wx-config --static --libs is not recognized in Other linker options.
The problem persisted even though I added the path to wx-config file in the .bashrc file from the home directory, i.e. export PATH="$PATH:/usr/i686-w64-mingw32/bin". At that time I was able to run wx-config from the terminal at any location.
To solve it I've changed the options to /usr/i686-w64-mingw32/bin/wx-config --static --cflags in Other compiler options and /usr/i686-w64-mingw32/bin/wx-config --static --libs in Other linker options. This worked as a charm.
I've added the location of libstdc++-6.dll (simply found it with a search in the file manager) in Link libraries and the flags -static and -static-libgcc in Other linker options and finally did the testing with the minimal sample as Igor suggested. Just create new console application, add minimal.cpp file to it and all of the mentioned above.
The compiler did a Minimal.exe file that I have opened successfully with wine.
Note: All the include directories I mentioned in my question were in wx-config --cflags for the compiler and wx-config --libs for the linker, so no need to add them in search directories.
I have been working on a program in SDL and I would like to send it to my friends who only run a Windows environment. I have done some reading and found that I should use mingw to cross-compile for Windows. The binary I found and compiled was x86_64-w64-mingw32-g++, however I am getting some issues getting my program to compile. Using the following command I get the following error:
/usr/bin/x86_64-w64-mingw32-g++ sapphire.cpp `pkg-config --cflags --libs sdl2` -lSDL2_image -lSDL2_mixer -lSDL2_ttf -std=c++11
fatal error: iconv.h: No such file or directory
While I realize I should make a makefile eventually, I am not going to do that now.
I tried installing iconv (Version 1.15) from here and used the following commands to compile it:
./configure --prefix=/usr/local
make
make all
My iconv.h is located in /usr/include but if I include that I get another error for missing gnu/stubs.h and if I include that then I get a myriad of errors that I'm not sure how/if I could fix seen here. Does anyone know how I could perhaps fix this? I would appreciate any help!
Thanks in advance!
You can use pkg-config with mingw in a crosscompiler environment but you should take care to where pkg-config searches for his .pc files.
I'm assuming your mingw crosscompiler is installed in /usr/x86_64-w64-mingw32, change it to the installation path where his "include" and "lib" subdirectories are.
Provided SDL windows developement package is installed in the same prefix on your computer and the installation has a correct pkg-config .pc file you can do:
export PKG_CONFIG_PATH=/usr/x86_64-w64-mingw32/lib/pkgconfig
and then try pkg-config from the command line:
pkg-config sdl2 --cflags
This should point you to some path inside /usr/x86_64-w64-mingw32, if it does your compilation will be successful.
Please note that if you want to compile a package for crosscompile (like the iconv you tried to compile) you should add to the ./configure script parameters:
--host=x86_64-w64-mingw32 --prefix=/usr/xx86_64-w64-mingw32
... and this may work or not, depending the package support the mingw32 compiler or not.
The way you compiled iconv built another linux version of it in /usr/local!
NOTE: As far as I know Ubuntu does not provide a windows package for SDL2, while other linux distro do, so you'll need to cross-compile SDL2 with the option I gave before you can compile your code. SDL2 does support cross-compilation using mingw.
I am desperately trying to install WebKitGTK+, but I have hit a two-hour impasse.
For one, the tarball provided on the website does not seem to follow any of the typical "build from source" conventions, and there are no instructions anywhere. Any build-from-source instructions they provide involve the unstable repository version, which I do not want to use...and anyhow, those do not seem to work.
I can find both the Webkit (libwebkitgtk-3.0-dev) and Webkit2 (libwebkit2gtk-3.0-dev) versions on the repository (I love Synaptic Package Manager), but though I've installed them, C++ (CodeBlocks) fails on...
#include <webkit/webkit.h>
It is worth noting that one of my employees installed the same package (libwebkitgtk-3.0-dev) successfully from the Debian Wheezy repositories, and he can use them in his code just fine, with the same import statement.
I added the path to /usr/include/webkitgtk-3.0/webkit under Global Compiler Settings --> Search Directories --> Compiler. My employee and I both have the exact same paths to this library added - his work, mine don't.
I'm losing my mind now. Help?
In Codeblocks go to the Project Build Options settings. You can get there by right clicking on the project in the "Projects Management" panel on the left side of the screen and choosing 'Build Options' then clicking on the project itself(NOT just the debug/release options) in the window that shows up. Click the "Search Directories" tab and in the compiler subtab you will need to enter the following path:
/usr/include/webkitgtk-3.0/
When adding them make sure you DO NOT add it as a relative path. Additionally in the "Compiler Settings" -> "Other Options" tab you might need to add one or more of:
`pkg-config --cflags gtk+-3.0 `
`pkg-config --cflags glib-2.0 `
`pkg-config --cflags pango `
`pkg-config --cflags cairo `
`pkg-config --cflags gdk-pixbuf-2.0 `
`pkg-config --cflags atk `
`pkg-config --cflags libsoup-2.4 `
On my system I could not get pkg-config to work for webkitgtk itself.
In trying to get Allegro (A C++ game programming library) to work with a very simple C++ application in Ubuntu 12.04, I am unable to get the program to compile with the allegro header definitions. It returns the error allegro.h - no such file or directory found. I tried running a pkg-config to find the proper linker command, but that didn't help in compilation.
I am almost certain it is installed correctly at this point. I tried using a pkg-config --cflags --libs allegro-5.0 for the include file paths, none of which worked when using in the g++ compile line.
Thanks in advance.
Running a pkg-config --cflags --libs allegro-5.0 told me wrong on the include path. It told me to use -I/usr/local/include and after some digging into that folder, I found that the include path is -I/usr/local/include/allegro5 instead. It is compiling fine now.
i want to add a dynamic configuration path (generated from pkg-config) to my project. (this is basically for third-party dependencies like boost, so workspace includes is not appropiate, and filesystem include neither because that would be hardcoded and every developer would have to change that manually)
i am on project properties->c++ general->paths and symbols->includes tab->add...->add directory path->variables but i can only select among existing variables, how do i create a new variable dynamically generated from a command line program? like pkg-config --cflags boost-1.43?
this is easy to do in netbeans; you just add the pkg-config commandline with the backquotes in the build additional options and it resolves the build include and even in theory it should update the indexer (although truth be said, last time the indexer was correctly updating from pkg-config was on netbeans 6.8, it has been broken on 6.9 and 6.9.1)
i read this StackOverflow post but i still not sure how it helps this specific case
i read somewhere that you can use $(shell pkg-config...) to generate environment variables but not sure where to place the command
if there is no easy out of the box solution i'll try the script in this blog post
btw, i'm using eclipse helios -cdt 7
thanks!
Pkg-config support is finally coming to CDT and will be finished on August.
http://code.google.com/p/pkg-config-support-for-eclipse-cdt/
you can use $(shell pkg-config --cflags your_libs) in:
Project properties->C/C++ Build->Settings->"Tools Settings" tab->**C Compiler**->Miscellaneous->Other Flags
and
you can use
$(shell pkg-config **--libs** your_libs)
in
Project properties->C/C++ Build->Settings->"Tools Settings" tab->**C Linker**->Miscellaneous->Other Flags
if the linker doesn't link, make sure (for example in the build console window) that the pkg-config flags appear after the objects to link.
you can do this in properties->C/C++ Build->Settings->"Tools Settings" tab->C Linker->Command line pattern moving ${FLAGS} to the end :
from this (for example) :
${COMMAND} **${FLAGS}** ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} **${INPUTS}**
to this :
${COMMAND} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} **${INPUTS} ${FLAGS}**
In eclipse 4.3.2 at least, it looks as though it's possible to simply add
`pkg-config --libs <mylibname>`
in
Project->Properties->C/C++ Build->Settings->GCC {C|C++} Linker->Miscellaneous->Linker Flags
similarly
`pkg-config --cflags <mylibname>`
in
Project->Properties->C/C++ Build->Settings->GCC {C|C++} Compiler->Miscellaneous->Other Flags
what i found so far is that you can do
project-> properties-> c++ build-> build variables
add a new variable of string type.
Call it whatever you like:
UNITTEST_CPP_CXXFLAGS
then set as its value:
$(shell pkg-config --cflags unittest-cpp)
the go to project properties-> c++ general -> path and symbols,
includes.
Select languages c++, otherwise it defaults to assembly source file.
Click add.
On the add directory path, click variables... (because we want to add the variable we have just created)
type the name of the variable (UNITTEST_CPP_CXXFLAGS), press enter and ok
when you rebuild the result of the shell command is replaced in a -I option (for the gnu gcc toolchain at least), in general pkg-config output might include one or more -I so this won't work. Lets go to c++ build->settings->tool settings->gcc c++ compiler->miscellaneous. In there, add ${UNITTEST_CPP_CXXFLAGS} to the other flags.
now the include will be added, but there is no hope of getting the indexer to browse those include!
Use this link at eclipse help/install new spftware. It installs pkg-config. https://raw.githubusercontent.com/TuononenP/pkg-config.p2/master/site.xml
I did find this link in this webpage. https://groups.google.com/forum/#!topic/pkg-config-support-for-eclipse-cdt/HNblZRTKBQQ