I want to start creating programs in C, so I installed the VSCode C/C++ extension, but then the guide (https://code.visualstudio.com/docs/languages/cpp) says that I also need a compiler. It says to check for one first:
Checking for the GCC compiler g++:
g++ --version
Checking for the Clang compiler clang:
clang --version
But when I execute those in the VSCode terminal (or even in the windows terminal) like this I get an error:
C:\Users\15Z-DB000>clang --version
'clang' is not recognized as an internal or external command,
operable program or batch file.
Is something missing from my terminal or windows? Or am I using the wrong terminal? In which directory am I even supposed to execute those commands? I also encountered similar issues before but it never bothered me until now. What else can I do?
If you have some other guides/recommendations for IDE's/compilers then feel free to list them as well.
I am using Codeblocks and have to run an OpenMP C program. So, I added the flag -fopenmp in Codeblocks (compiler settings) and am now getting the error of 'mingw32-g++.exe: error: libgomp.spec: No such file or directory'
So after a bit of searching on the internet about the error, I downloaded TDM-GCC ( installed in C:\TDM-GCC-64). But still the same error is being shown on Codeblocks.
What am I doing wrong?
Here is the build log:
mingw32-gcc.exe -c "D:\Language Files\MatrixMultiplication.c" -o "D:\Language Files\MatrixMultiplication.o"
mingw32-g++.exe -o "D:\Language Files\MatrixMultiplication.exe" "D:\Language Files\MatrixMultiplication.o" -fopenmp
mingw32-g++.exe: error: libgomp.spec: No such file or directory
There are multiple possible causes for this: Either you did not install OpenMP with the compiler or you made a mistake in the Code::Blocks configuration. Anyways go through the following steps and you should be able to fix it. You seem to be working on Windows but I also added remarks on how to do it on Linux.
1) You will need a compiler that comes with OpenMP. For Windows download TDM-GCC preferably the 64-bit executable (second file) and install it. Make sure you select OpenMP in the component tab: Components > gcc (TDM current: ....) > OpenMP (the last entry). Linux already comes with GCC so just open the command line and get yourself OpenMP by typing sudo apt-get install libomp-dev in the terminal.
2) You will have to configure the Compiler in Code::Blocks now: Go to Settings > Compiler under Selected Compiler select GNU GCC Compiler and click Copy and type in a convenient name for your new compiler such as TDM-GCC Compiler. Go to Toolchain executables and browse the directory for all the Program files (C compiler, C++ compiler, Linkers, Debugger, Resource compiler, Make) you should be able to find them in C:\TDM-GCC-64\ ...\bin on a Windows machine if you chose the default installation. I can't tell you the precise sub-directory as I working on a Linux machine but you should be able to find it pretty easily. Depending on your installation there might be two folders for 32- and 64-bit. For Linux this step is not necessary.
4) Then you need to set the Linker settings. This can be done for all projects (which I would not recommend) by doing the following steps in the aforementioned menu or for your current project by clicking Project > Build options. Go to Linker settings of the corresponding configuration (Debug or Release) and click Add under Link libraries. On a Windows machine you will need to browse a file called libgomp-1.dll (32-bit) or libgomp_64-1.dll (64-bit) which should be located in the same folder as the aforementioned Program files. Under Linux instead choose -lgomp under Other linker options.
3) Set the compiler flag -fopenmp (for all the projects or only the current one) by going to Compiler settings > Other compiler options and typing in there -fopenmp.
4) Test it with a program like the OpenMP "Hello World".
I am trying to use regex in a c program. i am using windows 10 and Dev-C++ . whenever i add header file for regex i.e.
#include <regex.h>
it gives me error
[error] regex.h: NO such file or directory.
i couldn't figure out how to download and install regex library for c in dev-c++. compiler: TDM-GCC 4.9.2 64-bit Release. Thanks for your help.
I assume there something wrong with the include path during the compilation process. There is a nice expanation of the compilation process of c/c++ applications over here, in case you're interested.
Basically, when compiling a c/c++ application, your compiler, in a first step, scans your source files and replaces all #include <file.h> with the content of file.h it finds in its search path.
Dev-c++ uses MinGW and a port of the GNU compiler collection (gcc) for the compilation process.
Now what you have to do:
Figure out whether regex.h is included in your MinGW installation (Check /usr/include.)
Adapt the include path in dev-c++
Sadly I don't have a computer running Windows nearby making it hard to help with these two steps. To install regex on MinGW this package seems promising.
I have installed codeblocks in windows 7 first time and try to run a simple C program but I get this error?
can't find compiler executable in your search path (GNU GCC compiler)
I tried many things to solve it but unable to compile.
Have you installed the Mingw compiler or any other simiar compiler? If not install that first. After you have done so, you need to set codeblocks to use that compiler. You can do that by going to the settings>compiler settings and set the necessary options there. You may need to refer the place where you have installed Mingw or other compiler. Note the compiler executable is gcc for C and g++ for C++ and the linker is ld i guess. Debugger is gdb. You need to tell codeblocks where are these located.
I also received that error. I fixed it using Settings -> Compiler -> Global compiler settings -> Toolchain executables -> Auto detect.
I haven't done C in a long time. I'd like to compile this program, but I have no idea how to proceed. It seems like the makefile refers to GCC a lot and I've never used GCC.
I just want an executable that will run on windows.
You may need to install either cygwin or mingw, which are UNIX-like environments for Windows.
http://www.mingw.org/
http://www.cygwin.com/
When downloading/installing either cygwin or mingw, you will have the option of downloading and installing some optional features; you will need the following:
gcc (try version 2.x first, not 3.x)
binutils
GNU make (or gmake)
If it requires gcc and you want it to run on Windows, you could download Cygwin.
That's basically an emulator for GNU/Linux type stuff for Windows. It works with an emulation DLL.
http://www.cygwin.com/
In order to compile this program you need a C compiler. It does not have to be gcc, although you are already given a makefile set up to use gcc. The simplest thing for you to do would be the following:
Install cygwin
Open the cygwin command prompt
go into the directory where you have your makefile
type 'make'
That should compile your program
If you are not comfortable with using command line tools then you can download the free version of MS Visual Studio and import the source files into a new Visual Studio project. This way you would not need to install cygwin and use gcc, but you would need to know how to create projects and run programs in Visual Studio.
You almost certainly don't need all of cygwin to compile using gcc. There are plenty of standalone gcc clones for Windows, like gcw.
If it's reasonably portable C code (I haven't looked at it), then you may be able to just ignore the included Makefile and feed the source into whatever compiler you do want to use. What happens when you try that?
Dev-C++ provides a simple but nice IDE which uses the Mingw gcc compiler and provides Makefile support. Here are the steps I used to build the above code using Dev-C++ (i.e. this is a "how-to")
After downloading the source zip from NIST, I
downloaded and installed the Dev-C++ 5 beta 9 release
created a new empty project
added all the .c files from sts-2.0\src
Then under Project Options
added -lm in the Linker column under Parameters
added sts-2.0\include to the Include Directories in Directories
set the Executable and Object directories to the obj directory under the Build Options
and then hit OK to close the dialog. Go to Execute > Compile and let it whirl. A minute later, you can find the executable in the sts-2.0\obj directory.
First, there is little chance that a program with only makefiles will build with visual studio, if only because visual studio is not a good C compiler from a standard POV (the math functions in particular are very poorly supported on MS compilers). It may be possible, but it won't be easy, specially if you are not familiar with C. You should really stick to the makefiles instead of trying to import the code in your own IDE - this kind of scienfitic code is clearly meant to be compiled from the command line. It is a test suite, so trying things randomly is NOT a good idea.
You should use mingw + msys to install it: mingw will give you the compilers (gcc, etc...) and msys the shell for the make file to run correctly. Contrary to one other poster, I would advise you against using gcc 2 - I don't see any point in that. I routinely use gcc 3 (and even 4) on windows to build scientific code, it works well when the code is unix-like (which is the standard platform for this kind of code).