I installed GLFW3 and am trying to compile my OpenGL program with the following:
g++ -std=c++11 main.cpp -lGL -lGLEW -lglfw3
But here's the library error I get:
/usr/bin/ld: cannot find -lglfw3
collect2: error: ld returned 1 exit status
I also tried with pkg-config:
g++ `pkg-config --cflags glfw3 glew` -o myprog main.cpp `pkg-config --static --libs glfw3 glew`
it compiles but when I run myprog it says it can't find libglfw.so.3
But it is located in /usr/local/lib
http://www.brandonfoltz.com/2012/12/compile-glfw-on-ubuntu-and-fix-libglfw-so-cannot-open-error/
Ubuntu installs libglfw.so.3 in /usr/local/lib so you have to add this line to /etc/ld.so.conf
I had the same problem.
In my case was usefull following steps:
Download glfw source code
unzip it
cd glfw_folder
cmake . (with dot)
make
sudo make install
To check, copy and paste following command in your console "whereis libglfw3".
you should have output like this one: "libglfw3: /usr/local/lib/libglfw3.a" (or another path after ":").
My config: VAIO Pro 13/Ubuntu 16.04 LTS/ Intel HD4000.
P.S.: Yes, I'd tryed "sudo apt-get install libglfw3" and all dependenses.
Related
I am trying to use the geos library on a Raspbery Pi 3, using Debian. I am trying to compile a program in C ++.
The same program can be compiled on other computers, this means that the source code of my program is correct.
When executing the command geos-config --version, version 3.7.1 is returned to me.
A while ago, a friend compiled and has been using the same code in Raspibian. However, I can't run it on Debian. My friend does not remember how he installed the geos library.
Would anyone know of anything that could help me?
make
Building target using GCC compiler: sources/geometry-manager.cpp
g++ -g -c sources/geometry-manager.cpp -std=c++17 -w -c -rdynamic -W `wx-config --cxxflags --libs --gl-libs` `geos-config --cflags` -lgeos -lglut -lGLU -lGL -lm -lGLEW -o builded/geometry-manager.o `pkg-config --libs geographiclib`
In file included from sources/geometry-manager.cpp:14:
sources/../include/geometry-manager.hpp:26:10: fatal error: geos.h: No such file or directory
#include <geos.h>
^~~~~~~~
compilation terminated.
make: *** [Makefile:37: builded/geometry-manager.o] Error 1
geos-config --includes : /usr/include.
geos-config --cflags : -I/usr/include.
geos-config --libs : -L/usr/lib/aarcg64-linux-gnu -lgeos-3.7.1 .
I installed via apt-get. However, as it didn't work, I installed it from the cloned github repository. –
Solution:
I uninstalled geos from my computer. Afterwards, I deleted all the folders related to geos that were still on the computer.
For some reason, the installation from the current repository did not work. So I cloned an old version of the geos.
https://github.com/libgeos/geos.git
I ran autogen.sh script (which didn't work before).
And this time it compiled and installed it successfully.
Thanks
When I tried to run example of gRPC for c++ in folder grpc/examples/cpp/helloworld it requires libraries which weren't compiled when I built gRPC with Cmake
Firstly I built gRPC in Ububtu 16.04 with instructions:
$ git clone -b $(curl -L https://grpc.io/release) https://github.com/grpc/grpc
$ cd grpc
$ git submodule update --init
$ cd third_party/protobuf
$ git submodule update --init --recursive
$ ./autogen.sh
$ ./configure --prefix=/usr
$ make
$ make check
$ sudo make install
$ sudo ldconfig # refresh shared library cache.
$ pkg-config --cflags protobuf # print compiler flags
$ pkg-config --libs protobuf # print linker flags
$ pkg-config --cflags --libs protobuf # print both
cd ../..
make
sudo make install
After that I tried to run example in folder grpc/examples/cpp/helloworld
grps/grpc/examples/cpp/helloworld$ make
i got several mistakes, which were resolved by copying grpc_cpp_plugin from folder grpc/bins/opt to /usr/local/bin and grpc++.pc and grpc++_unsecure.pc from grpc/libs/opt/pkgconfig/ to /usr/local/lib/pkgconfig.
When I tried for the next time command
grpc/examples/cpp/helloworld$ make
I've got message
g++ helloworld.pb.o helloworld.grpc.pb.o greeter_client.o -L/usr/local/lib `pkg-config --libs protobuf grpc++ grpc` -pthread -Wl,--no-as-needed -lgrpc++_reflection -Wl,--as-needed -ldl -o greeter_client
/usr/bin/ld: cannot find -lgrpc++
/usr/bin/ld: cannot find -lgrpc++_reflection
collect2: error: ld returned 1 exit status
Makefile:44: recipe for target 'greeter_client' failed
make: *** [greeter_client] Error 1
So, I searched these libs libgrpc++ in folder grpc/libs/opt, but there only these libraries
grpc/libs/opt$ ls --l
libaddress_sorting.a libgrpc_cronet.so.8
libaddress_sorting.so libgrpc_cronet.so.8.0.0
libaddress_sorting.so.8 libgrpc_plugin_support.a
libaddress_sorting.so.8.0.0 libgrpc.so
libares.a libgrpc.so.8
libboringssl.a libgrpc.so.8.0.0
libgpr.a libgrpc_unsecure.a
libgpr.so libgrpc_unsecure.so
libgpr.so.8 libgrpc_unsecure.so.8
libgpr.so.8.0.0 libgrpc_unsecure.so.8.0.0
libgrpc.a pkgconfig
libgrpc_cronet.a protobuf
libgrpc_cronet.so
So make didn't compile static and dynamic libraries for gRPC. Is it I did something wrong or didn't something or there is a bug? Version of protobuf is
:~$ protoc --version
libprotoc 3.8.0
:~$ which protoc
/usr/bin/protoc
Here is some output after I run "make" from root directory
[MAKE] Generating /home/user/cpp_test/grps/grpc/libs/opt/pkgconfig/grpc++.pc
[MAKE] Generating /home/user/cpp_test/grps/grpc/libs/opt/pkgconfig/grpc++_unsecure.pc
So it creates pkgconfig files for "libgrpc++*" libraries, but doesn't create these libraries.
And these having libgrpc++
libgrpc++ depbase=`echo google/protobuf/io/tokenizer.lo | sed 's|[^/]*$|.deps/&|;s|\.lo$||'`;\
and
libgrpc++ depbase=`echo google/protobuf/util/delimited_message_util.lo | sed 's|[^/]*$|.deps/&|;s|\.lo$||'`;\
only two lines
It looks like you only ran make from the third_party/protobuf directory (which you need to do as the first step), and ran make from the helloworld directory. If you did not do so already, you should run make from the grpc repository root directory, per the documentation. This will ensure the libgrpc++* C++ libraries are built.
So, I resolved this problem.
When I run "make" on root gRPC folder, compilation ended with such result:
[CXX] Compiling /home/user/cpp_test/grps/grpc/gens/src/proto/grpc/core/stats.pb.cc
/home/user/cpp_test/grps/grpc/gens/src/proto/grpc/core/stats.pb.cc:187:13: error: ‘dynamic_init_dummy_src_2fproto_2fgrpc_2fcore_2fstats_2eproto’ defined but not used [-Werror=unused-variable]
static bool dynamic_init_dummy_src_2fproto_2fgrpc_2fcore_2fstats_2eproto = []()
^
cc1plus: all warnings being treated as errors
Makefile:2924: recipe for target '/home/user/cpp_test/grps/grpc/objs/opt//home/user/cpp_test/august/grpc/gens/src/proto/grpc/core/stats.pb.o' failed
make: *** [/home/user/cpp_test/grps/grpc/objs/opt//home/user/cpp_test/august/grpc/gens/src/proto/grpc/core/stats.pb.o] Error 1
Because all warnings were treated as errors. And compiling of another libraries was stopped. So I manually added in Makefile in root gRPC directory flag -Wno-unused-variableat the end of 357 line. After adding this flag building of gRPC library went succesfully, and all libgrpc++* and libgrpc* libraries were built.
CPPFLAGS += -g -Wall -Wextra -Werror $(W_NO_UNKNOWN_WARNING_OPTION) -Wno-long-long -Wno-unused-parameter -Wno-deprecated-declarations -Wno-sign-conversion -Wno-shadow -Wno-conversion -Wno-implicit-fallthrough -Wno-sign-compare -Wno-missing-field-initializers -Wno-maybe-uninitialized -DPB_FIELD_32BIT -DOSATOMIC_USE_INLINED=1 -Ithird_party/nanopb -Ithird_party/upb -Isrc/core/ext/upb-generated -Wno-unused-variable
I want to use the C++ API for graphicsmagick
I need to convert image data directly from OpenCV and use graphicsmagick to save the file as tiff with group 4 compression
The command line
gm convert input -type bilevel -monochrome -compress group4 output.tif
Could anyone provide some code (see the above command line) to simply convert the output from OpenCV to tiff with group 4 compression
I'm new to C++ :)
testing graphicsmagick
I'm trying to make graphicsmagick work. Found a very simple code in the docs
I can't find Magick++.h
locate /Magick++.h returns nothing
but graphicsmagick is installed
# gm -version
GraphicsMagick 1.3.20 2014-08-16 Q8 http://www.GraphicsMagick.org/
code
/*
* Compile
* g++ gm_test.cpp -o gm_test `GraphicsMagick++-config --cppflags --cxxflags --ldflags --libs`
*/
#include <Magick++.h>
using namespace std;
using namespace Magick;
int main(int argc, char **argv){
InitializeMagick(*argv);
Image image( "100x100", "white" );
image.pixelColor( 49, 49, "red" );
image.write( "red_pixel.png" );
return 0;
}
compile
# g++ gm_test.cpp -o gm_test `GraphicsMagick++-config --cppflags --cxxflags --ldflags --libs`
-bash: GraphicsMagick++-config: command not found
gm_test.cpp:6:22: fatal error: Magick++.h: No such file or directory
#include <Magick++.h>
^
compilation terminated.
Updated Answer
Try looking for a file called GraphicsMagick-config under the directory where you installed GraphicsMagick like this:
find /usr -name "GraphicsMagick-config"
When you find that, you can ask it to tell you the compiler include flags and linker flags like this:
/usr/some/path/GraphicsMagick-config --cflags --libs
Then you can compile with:
gcc $(/usr/some/path/GraphicsMagick-config --cflags --libs) somefile.c -o somefile
Original Answer
Look in the directory where you installed GraphicsMagick for a file ending in .pc, which is the pkg-config file, e.g.
find /usr/local -iname "graphic*.pc"
Then pass this file to pkg-config to get the CFLAGS and LIBS you should use for compiling. So, if your graphicsmagick.pc is in /usr/local/Cellar/graphicsmagick/1.3.23/lib/pkgconfig/GraphicsMagick.pc, use:
pkg-config --cflags --libs /usr/local/Cellar/graphicsmagick/1.3.23/lib/pkgconfig/GraphicsMagick.pc
which will give you this:
/usr/local/Cellar/graphicsmagick/1.3.23/lib/pkgconfig/GraphicsMagick.pc
-I/usr/local/Cellar/graphicsmagick/1.3.23/include/GraphicsMagick -L/usr/local/Cellar/graphicsmagick/1.3.23/lib -lGraphicsMagick
Then you would compile with:
gcc $(pkg-config --cflags --libs somefile.c -o somefile
i don't know if it's helpful, last day i have the same error :no magick++.h when i compile ImageMagick (not graphicsmagick).
so i follows the steps in a official website to reinstall ImageMagick and finally i succeed.web:
1 http://www.imagemagick.org/script/install-source.php
2 http://www.imagemagick.org/script/magick++.php
i download the latest source code(ImageMagick6.9) in centOS-6.5
and then ./configure, make, make install.
i hope it's helpful.
On Ubuntu the GraphicsMagick++-config program you are using to get compile flags is correctly part of the same package which includes Magick++.h. Trying to run it tell you where to find it:
$ g++ gm_test.cpp -o gm_test `GraphicsMagick++-config --cppflags --cxxflags --ldflags --libs`
The program 'GraphicsMagick++-config' is currently not installed. You can install it by typing:
sudo apt-get install libgraphicsmagick++1-dev
gm_test.cpp:6:22: fatal error: Magick++.h: No such file or directory
compilation terminated.
So do what it says:
$ sudo apt-get install libgraphicsmagick++1-dev
Try the compile again and you will get a different error because GraphicsMagick++-config is linking to an uninstalled and unneeded library:
$ g++ gm_test.cpp -o gm_test `GraphicsMagick++-config --cppflags --cxxflags --ldflags --libs`
/usr/bin/ld: cannot find -lwebp
collect2: error: ld returned 1 exit status
You can manually specify the libs and the compile and link works:
$ g++ gm_test.cpp -o gm_test -I/usr/include/GraphicsMagick -Wall -g -fno-strict-aliasing -O2 -pthread -lGraphicsMagick++ -lGraphicsMagick -ljbig
$ ./gm_test
Or you can install the required library:
$ sudo apt-get install libwebp-dev
I try to crosscompile this small program to my arm device, but get error:
arm-none-linux-gnueabi/bin/ld: cannot find -lasound
collect2: error: ld returned 1 exit status
Then i found libasound files in my target device and have copied to my folder /usr/lib but still no effect.
I use the commands:
export CFLAGS="-I/usr/include -I/usr/lib"
$CC -o play sound_playback.c $CFLAGS -lasound
I have installed libasound2-dev package on my Ubuntu 14.04 x64 and be able to compile the program on my native computer without any errors.
UPDATE WITH SOLUTION
As Marc and John have said below, i just should use -L flag to set my library path. So my command line should be:
$CC -o play sound_playback.c $CFLAGS -L/usr/lib -lasound
I'm trying to compile a sample program after installing Opencv with the command:
g++ hello-world.cpp -o hello-world -I /usr/local/include/opencv -L /usr/local/lib -lm -lcv -lhighgui -lcvaux
however, I'm getting an error that says:
/usr/bin/ld: cannot find -lcv
/usr/bin/ld: cannot find -lhighgui
/uer/bin/ld: cannot find -lcvaux
collect2: ld returned 1 exit status
What do I need to do to correct this?? I installed opencv by downloading the latest stable version and using cmake to create the build files, then ran make install from the command line.
Was there anything I may have missed?
UPDATED-
Better use this command:
g++ opencv.cpp -o opencv -L `pkg-config --cflags --libs opencv`
The pkg-config command will locate the correct include and library for your source code.
For better handling with OpenCV programming go with an IDE like code::block.
Maybe this tutorial will help you in OpenCV programming with code::block:
How to Setup OpenCV for code :: block in Linux and Windows?
Recently I started using OpenCV and I got similar problem and for me this works really well:
-lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_objdetect
Hope it will solve your problem.
You need to add another -L argument specifying the actual location of the OpenCV libraries.