I am very new to using C on MacOS. I have been trying to compile C code on MacOS using clang, using the make command.
However, I want to use the default clang that comes with MacOS. When I type which clang on my Mac, it gives the result,
/Users/prateek/opt/anaconda3/bin/clang
instead of the standard clang that comes with MacOS, /usr/bin/clang.
Any ideas on how to change this back to the /usr/bin/clang ?
I am new to asking questions on StackOverflow as well, so please excuse my mistakes, if I have made any. Help would be really appreciated, thanks in advance!
Just add a line in your .bash_profile after the block added by conda installation.
export PATH="/usr/bin:$PATH"
Then it uses the clang in /usr/bin as you want. But I would recommend you use CommandLineTools clang instead because, otherwise, it can give you SDK version conflicts sometimes. You can just replace that with:
export PATH="/Library/Developer/CommandLineTools/usr/bin:$PATH"
Related
I have been using gcc version 5.3.0. It says that it comes with openmp support. But every time when I compile a program using either gcc [by terminal] or via xCode 7, I get same error, "file omp.h not found". I have searched too much on this issue and tried almost everything I found.
First I tried to locate omp.h on my mac. I found some files; then in header file, I used that specific location of omp.h but no help [it gave me linker error].
I installed gcc version 6.0 (pre-release) but no help. I tried changing C_INCLUDE_PATH [which is now, and previously set to none] but that didn't helped me as well.
I reinstalled clang-omp but no help.
I am using llvm compiler version 7.0. Although i have installed clang-omp, there is no omp.h in my /usr/include/*
I changed the compiler and now I am able to run it. [It was issue of clang, which I couldn't solve].
I am a student and Intel is giving Intel Parallel Studio 1 year licence for free to students.
So I downloaded, and installed it.
In xCode, under build settings, I set my compiler to 'Intel C/C++ compiler' and in parallalization, I turned it to 'yes'. That was it. Then it compiled successfully. But, note that you won't be using header file 'omp.h' anymore.
By the way, I am still looking for answers, just to know what I was doing wrong.
You can install 'clang-omp' or 'gcc' (corresponds to GCC 5.3 right now) packages via Homebrew, both of which support OpenMP.
The built in GCC is based upon GCC 4.2.1 abs uses LLVM back end via Dragonegg, which is why it doesn't support OpenMP.
As noted already, Intel compilers support OpenMP on Mac.
I don't use Xcode editor so I don't know how to use any of these from there, but all will work from terminal just as they do on Linux.
the compiler on the mac is clang (based on llvm 3.5) which does not support openmp.
you can try install llvm/clang/openmp from source or using prebuild binaries, but I must admit it does not work as advertised for me…
edit unless you use the -fopenmp=libomp flag.
I upgraded to Yosemite, and now all my compilers (from the command line—gcc and icc) are giving me errors like: cannot open source file “ctype.h"
Does anyone know how to fix this? Do I need to reinstall the compilers?
OK, not sure what’s going on here, but after updating to Xcode 6.1.1 and installing the associated command line tools, icc seems like it can now find the system headers. Now having a separate issue with gcc, will post separately…
The following html link contains all the relevant bash command line records of the installation process. Thank you for help!
That was a bad question
I didn't use XCode through I know Xcode will make it easier! I use an Air, memory of 4GB currently.
If this won't work easily I probably will quit learning C or run and compile C on Windows. :(
And XCode stuff, whatever.
You command-line output indicates rather clearly that you aren't telling gcc what to compile, so it's throwing its hands up in exasperation:
$ gcc
i686-apple-darwin10-gcc-4.2.1: no input files
You'll need to specify the file you're compiling. Better yet, use an IDE, like Xcode.
<Shrug> What do you want us to say?
Obviousy Macports is trying to build/install gcc but it can't without a compiler. Yes gcc can be built without a preexisting compiler, but good luck and why? Especially when XCode is a free download, click click let it start and a little while later it's done. At that point as pointed out elsewhere, gcc, g++ will work, but it's not actually gcc but clang in disguise.
If you want, you can use macports or brew or whatever later if you really want to, but again why? For programs that only work using gcc extensions? Doubt it. You just want a c/c++ compiler. If you ever want to do programs for the Mac or IPhone, you need XCode anyway, gcc won't do.
I'm compiling a C code in Xcode 4.6.3, however I don't know which compiler I'm using. I need to use gcc 4.2.
Thanks in advance.
If you really need to change to gcc, you can do so in the build settings:
I just installed Dev C++ and I am learning C programming.
the code i used was
#include <stdio.h>
int main()
{
printf("Hello world");
getch();
}
I saved it as a .c file. When I compile it works fine, but when I compile and run it says source file not compiled. So I googled buncha things and came across this video on youtube which shows you how to fix it. I also saw other forums on google which suggest the same thing... However, after doing whats asked, Now I can't even compile my code. I get this error
Compiler: Default compiler
Executing C:\Dev-Cpp\bin\gcc.exe...
C:\Dev-Cpp\bin\gcc.exe "C:\Users\ubaid\Documents\C\Untitled1.c" -o "C:\Users\ubaid\Documents\C\Untitled1.exe" -I"C:\Dev-Cpp\include" -L"C:\Dev-Cpp\lib"
gcc.exe: Internal error: Aborted (program collect2)
Please submit a full bug report.
See <URL:http://www.mingw.org/bugs.shtml> for instructions.
Execution terminated
I have also used what is asked on this link, and still no luck..
http://learntogeek.com/miscellaneous/solved-source-file-not-compiled-error-in-dev-cpp/
I am using windows 8
I was having this issue and fixed it by going to:
C:\Dev-Cpp\libexec\gcc\mingw32\3.4.2
, then deleting collect2.exe
Install new version of Dev c++. It works fine in Windows 8. It also supports 64 bit version.
Download link is http://sourceforge.net/projects/orwelldevcpp/ .
I guess you're using windows 7 with the Orwell Dev CPP
This version of Dev CPP is good for windows 8 only. However on Windows 7 you need the older version of it which is devcpp-4.9.9.2_setup.exe
Download it from the link and use it.
(Don't forget to uninstall any other version already installed on your pc)
Also note that the older version does not work with windows 8.
This maybe because the c compiler is designed to work in linux.I had this problem too and to fix it go to tools and select compiler options.In the box click on programs
Now you will see a tab with gcc and make and the respective path to it.Edit the gcc and make path to use mingw32-c++.exe and mingw32-make.exe respectively.Now it will work.
The reason was that you were using compilers built for linux.
You can always try doing it manually from the command prompt. Navigate to the path of the file and type:
gcc filename.c -o filename
I found a solution. Please follow the following steps:
Right Click the My comp. Icon
Click Advanced Setting.
CLick Environment Variable. On the top part of Environment Variable Click New
Set Variable name as: PATH then
Set Variable Value as: (" the location of g++ .exe" )
For ex. C:\Program Files (x86)\Dev-Cpp\MinGW64\bin
Click OK
This error occurred because your settings are not correct.
For example I receive
cannot open output file Project1.exe: Permission denied
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe: *** [Project1.exe] Error 1
Because I have no permission to write on my exe file.
After some investigation, and with Dr.Topaz's help, I have learned that you will want to confirm that the program set for g++ in the Compiler Options really does compile the source code. In my case, the C:\Dev-Cpp\bin\g++.exe program did not create an exe, but the C:\Dev-Cpp\bin\c++.exe program did. Either program appears to be intended to take the same arguments and options as GNU g++. I would love to find an actual doc on the Dev-C++ compiler programs, but I have not so far.
You can test the compiler program with a simple example like this:
C:\Dev-Cpp\bin\c++.exe hello.cpp -o hello.exe
Currently in 2021, the Dev-C++ site invites you to download either original Dev-C++ or a newer fork by a group named Embarcadero.
I decided to try the Embarcadero version and the experience was slightly better. The UI is still a tad dated, but the g++.exe program it came with was able to compile programs without issue. Again, take note of where the program is being installed, but in my case, the Embarcadero compiler programs were in C:\Program Files (x86)\Embarcadero\Dev-Cpp\TDM-GCC-64\bin.
Both original Dev-C++ and Embarcadero come with mingw-32 versions of the compiler programs that from what I see do work in a Git Bash console, with slight differences such as not recognizing a default locale when using the command std::cout.imbue(std::locale("")).
I faced this similar error, and none of the solutions worked.
so I tried to download the latest version from here, https://www.bloodshed.net/
I rerun the program.
and everything is now working correctly.
I was facing the same issue as described above.
It can be resolved by creating a new project and creating a new file in that project.
Save the file and then try to build and run.
Hope that helps. :)