I have included the boost library in a Codeblocks c++ project.
Now, in the file
boost/function.hpp
there is an include statement
#include <boost/preprocessor/iterate.hpp>
However I get this error in Codeblocks when I try and compile:
/home/arvind/Documents/Workspace/Browser/boost/function.hpp|15|fatal error:
boost/preprocessor/iterate.hpp: No such file or directory|
What am I doing wrong here? I have simply included the Boost library as it is.
Also, I cannot find the screen/option to set the main class (which will actually execute).
How do I do this?(I am new to CodeBlocks hence this question).
Your boost includes seem to be in a non-standard/system directory : /home/arvind/Documents/Workspace/Browser, you must tell the compiler to look there (gcc -I command-line switch).
Go to Project->Build Options->Search Directories->Compiler and add the directory where boost includes are. I don't have a codeblocks install right here so this was from here.
If you can, I would recommand installing boost on your system once and for all instead of just copying files in your codeblocks workspace.
Related
I have a CMake file which does this:
find_package(Boost COMPONENTS system filesystem)
add_library(MyModule MODULE main.cpp)
target_include_directories(MyModule PUBLIC ${Boost_INCLUDE_DIRS})
target_link_libraries(MyModule Boost::system Boost::filesystem)
I'm using VS 2017 as my generator. When I generate the project file with cmake, it finds boost_system-vc141-mt-1_63.lib and I can see that it is in the linking rules of the vcxproj. However, when I try to compile I get this error:
LINK : fatal error LNK1104: cannot open file 'libboost_system-vc140-mt-1_63.lib
Note the different generators (vc140 vs vc141). I know my compiler has output the right values because I built boost from source, so I tried to just rename vc141 to vc140, but the error stayed the same. I also confirmed that vc140 is not referenced in the project file.
What's going on? How can I force boost to link to the correct version?
When building with Visual Studio, boost has some pragma statements which do the linking for you. This is called "Auto-linking" and it over-rides any command-line arguments you may be passing to the linker.
The solution is to define BOOST_ALL_NO_LIB. This can be done in two ways:
In source code before including boost headers as #define BOOST_ALL_NO_LIB.
It could be added to your cmake file as: add_definitions("-DBOOST_ALL_NO_LIB").
As of CMake 3.5: Use the disable_autolinking imported target:
target_link_libraries(MyModule Boost::system Boost::filesystem Boost::disable_autolinking)
Trying to use Code::blocks with the library Eigen. Using windows vista. With some help from a forum I got this command to compile a sample program:
C:\Users\Me\Desktop\eigen>g++ -I C:\Users\Me\Desktop\eigen\eigen3
-o test2.exe C:\Users\Me\Desktop\eigen\test.cpp
But if I cd anywhere else (other than my folder containing test.cpp) and try to build, I get a permission denied error.
On code blocks I started a new project and went to Settings->Compiler->Linker settings->Link libraries-> and added C:\Users\Me\Desktop\eigen
And also added the same link under build options. I got this error:
C:\Users\Me\Desktop\GUI\vector\main.cpp|2|fatal error:
Eigen/Dense: No such file or directory|
The pages I followed were:
http://eigen.tuxfamily.org/dox/GettingStarted.html
https://github.com/Microsoft/AirSim/blob/master/docs/install_eigen.md
As eigen has already stated, all you have to do is copy the headers from the eigen folder to the include folder of your compiler (or just make sure your compiler can find your eigen folder).
Just copy the entire Eigen folder from drive/(where eigen is)/eigen/ to the include folder of code blocks in CodeBlocks\MinGW\include.
After that, all you have to do is make sure in Settings->Compiler in the Search directories tab, the compiler tab has the location to include and linker tab to lib, and the same goes for your build options.
There is absolutely no use of adding the Eigen folder to link libraries option of the linker tab, since Eigen has no libraries and works only with headers.
I have included an external package callled SoPlex (a folder of .cpp and .h files and the library files) into my OMNet++ project. I have already tested the package in Code::Blocks IDE and it works fine besides some warnings it had: warning: explicit conversion operators only available with -std=c++11 or -std=gnu++11.
It certainly was working in Code::Blocks IDE. But when I want to use it in my OMNet++ project it gives a lot of errors for the SoPlex package like in the picture:
It gives a lot of errors for just the code of SoPlex and not my OMNet++ project code.
Any idea what may cause the problem?
I have used MinGW to compile SoPlex package in Code::Blocks IDE. When I use MinGW GCC in OMNet++ instead of GCC for OMNet++ as current toolchain there is this error fatal error: omnetpp.h: No such file or directory.
Regarding the errors with the 3rd party library. Depending where you put the library inside the src folder, at least that directory must be added as an include dir, otherwise the header files will not be found by the compiler.
As for the problem with the omnetpp.h: OMNeT++ has it's own makefile generator which automatically adds the required include folder (omnetpp_root/include). The generic MinGW GCC toolchain does not. If you want to avoid extra work, always use the omnet toolchain to build your models.
I used Cmake gui and the FindBoost module to add Boost as a dependency in my visual studio 2010 c++ project. I set the parameter that tells FindBoost to use the win32 thread library instead of pthread (because I'm running on windows). When i build my code, all the calls to boost libraries compile fine, but boost itself is having a compile error. its failing on
boost\thread\pthread\mutex.hpp line 11
cannot open include file: 'pthread.h': No such file or directory
If I could make it use the win32 library, the mutex.hpp (and all the other files) dont call pthread.h
How do I build so that it uses boost\thread\win32 ?
here is the section of my cmakelists.txt
# include boost
set(BOOST_ROOT "E:/boost_1_58_0/boost_1_58_0")
add_definitions( -DBOOST_ALL_NO_LIB )
find_package(Boost COMPONENTS thread system)
if(Boost_FOUND)
message(STATUS "Boost was found, Success!")
# telling it to use win32 threads not pthreads
set(Boost_THREADAPI "win32")
INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
LINK_DIRECTORIES(${Boost_LIBRARY_DIRS})
endif()
CMake comes with a module called FindBoost which i used, and it correctly found the boost directory and set the following
Boost_INCLUDE_DIR
E:/boost_1_58_0/boost_1_58_0/
Boost_LIBRARY_DIR
E:/boost_1_58_0/boost_1_58_0/stage/lib
Boost_SYSTEM_LIBRARY_DEBUG
E:/boost_1_58_0/boost_1_58_0/stage/lib/boost_system-vc100-mt-gd-1_58.lib
Boost_SYSTEM_LIBRARY_RELEASE
E:/boost_1_58_0/boost_1_58_0/stage/lib/boost_system-vc100-mt-1_58.lib
Boost_THREAD_LIBRARY_DEBUG
E:/boost_1_58_0/boost_1_58_0/stage/lib/boost_system-vc100-mt-gd-1_58.lib
Boost_THREAD_LIBRARY_RELEASE
E:/boost_1_58_0/boost_1_58_0/stage/lib/boost_thread-vc100-mt-1_58.lib
visual studio project settings
C/C++ -> General -> Additional Include Directories:
...bunch of my other dependencies
E:\boost_1_58_0\boost_1_58_0
Linker -> General -> Additional Library Directories
E:/boost_1_58_0/boost_1_58_0/stage/lib;E:/boost_1_58_0/boost_1_58_0/stage/lib/$(Configuration);%(AdditionalLibraryDirectories)
Linker -> General -> Link Library Dependencies - No
Linker -> General -> Use LIbrary Dependency Inputs - No
Linker -> Input -> Additional Dependencies:
...bunch of my other .libs
boost_thread.lib
boost_system.lib
I fixed the error but I had try what I call the "dumb" way. The "smart" way didnt work. Smart way was reviewing several times the cmakelists code and the visual studio include library settings. i even did a clean and rebuild boost using b2 and manually set threading=multi and link=static because i thought maybe the library just wasnt built correct.
Finally i gave up and tried the dumb way: I cut and pasted the pthread folder and moved it somewhere else, so that it was no longer in the boost/thread folder, only the win32 folder.
I wish i tried it so long ago, because i didnt think that the compilation error would be due to my project's code, but rather an environment setting in the include and linking. But sure enough i got an error showing that in one of my project's files i was directly trying to include that mutex.hpp from the pthread folder. i didnt write this code (its open source) so i couldnt have exactly known, but still i want to slap myself
#include <boost/thread.hpp>
#include <boost/thread/pthread/mutex.hpp>
changing pthread to win32 made the error go away.
I am trying to compile some C++ code which uses the CGAL library on OS X Lion. I downloaded and installed on some directory the CGAL library. Then, when I try to compile the code, using "make";
triangulation.h:18:64: error: CGAL/Exact_predicates_inexact_constructions_kernel.h: No such file or directory
which means it does not find the CGAL lib. I look at the Makefile, and I see that it compiles using the flag
-lCGAL
Wondering how to solve this, I guess I could pass the information about the placement of my compiled library to this variable, but I do not how. I tried with export and so on but it does not recognize it, any hints?
The error message doesn't mean the library isn't found; it means a header file isn't found. The -lCGAL switch does indeed refer to the library. You're going to need a -IXXXXX switch added on to CFLAGS, where XXXXX is the path to the directory containing the CGAL directory which in turn contains Exact_predicates_inexact_constructions_kernel.h .