I am trying to compile a simple "hello world" program with gcc on macOS and for some reason I get the error
"fatal error: stdio.h: No such file or directory"
The interesting thing is that, if I compile using the entire path, so
/usr/bin/gcc hello.c
then everything works out fine. Although, if I run
which gcc
I get
/usr/local/bin/gcc
and with this path the compilation gives me the same error.
I used homebrew to install gcc, Xcode is up do date.
I really need to get this work, because I need to compile a code that uses both fortran and c modules, nd I have no idea how to modify the Makefile. Fortran compilation with gfortran works out fine.
Thanks!
Follow steps
Step 1 : run xcode-select --install
Step2 : Added this line
export CPATH=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
to your .bash_profile file.
Step 3 : restart the terminal.
I'm trying to compile my OpenMP program, but it doesn't work, this error message shows:
fatal error: 'omp.h' file not found
I've tried the solutions for this problem here, but nothing worked with me.
please help
I'm Mac user
You probably need to reinstall with:
brew reinstall gcc --without-multilib
Then you need to make sure you use the homebrew version of gcc (rather than anything Apple supplies) by running gcc-5 rather than plain gcc. You can check its name and version by running the following because homebrew normally always installs everything to /usr/local/bin:
ls /usr/local/bin/gcc*
Finally, you need to add the -fopenmp flag to your compiler invocation to tell the compiler to do the OpenMP thing.
So, your command will look like:
gcc-5 -fopenmp program.c -o program
When I run
gcc test.c
in the terminal of msys,
I get the error
test.c:1:18: fatal error: x264.h: No such file or directory
#include <x264.h>
I can find the x264.h in /local/include
$ ls /local/include/
x264.h x264_config.h
Why MinGW gcc doesn't search the default place?
It's not a "default place" for MinGW GCC. The fact that you're calling native Win32 GCC from the MSYS shell does not mean it knows about these Unix paths MSYS conjures up.
Either install to the / directory or add your 3rd party library directory to the include paths on the commandline:
-I/local/include
Note the above only works from within the MSYS shell.
I downloaded
Ruben’s build of
Cygwin GCC.
However upon running it seems unable to compile any files
$ touch foo.c
$ gcc foo.c
gcc: error: spawn: No such file or directory
As a workaround, I found this to work
i686-w64-mingw32-gcc foo.c
I had the same problem and solved it by installing the g++ package in addition to gcc-core
I had this same problem on Cygwin64, and the solution was PATH related..kinda.
Turns out, there are copies of gcc in /usr/bin and /bin (at least, there is in my install).
Executing /bin/gcc failed with the error above -- I'm guessing due to incorrectly assumed relative paths???
Executing /usr/bin/gcc works as expected!
In my case, the "problem" was that I had inadvertently injected "/bin" into my PATH environment variable, resulting in /bin/gcc being executed, instead of /usr/bin/gcc. Removing the "/bin" from the path solved the problem.
Still unclear why there are two gcc binaries (which appear to be identical) in different places... but maybe the Cygwin gurus can answer that; or maybe my installation is just foo-barred.
Ruben's builds are not Cygwin GCC packages, rather they are cross-compilers which run on various platforms but target native Windows using the MinGW-w64 toolchain.
In any case, you shouldn't be using them on Cygwin. If you want to compile Cygwin executables, install the gcc4 packages; if you want to cross-compile for Windows, install the mingw64-i686-gcc (for Win32) or mingw64-x86_64-gcc (for Win64) packages instead.
Gcc isn't really the compiler. It's a front end program that orchestrates the execution of any necessary compiler, assembler, and linker components. Typically these others are separately compiled programs.
So, gcc is trying (kind of) to tell you that it can't find the compiler. I guess it needs to be on your PATH or in an expected location.
If you are executing this from a Windows DOS box then it definitely needs a windows PATH setting.
I like to install Cygwin, making sure to include rxvt. At that point, you can configure a purely sh(1) path and your environment is rather more civilized.
I had the same error when I tried to extract a couple of executables from cygwin installation dirctory and copied them into another location.
strace shows me the file which was not found by spawn:
/lib/gcc/x86_64-pc-cygwin/6.4.0/cc1.exe
When I copied cc1.exe into the location relative to
<dir with sh.exe and cpp.exe>/../lib/gcc/x86_64-pc-cygwin/6.4.0/cc1.exe
it works fine.
This error occurs whenever cygwin cc can't find a required file.
For those running stuff within cygwin's bin directly from a Windows shell, a gotcha to watch out for is that Windows allow you to run programs from the command line like this:
e:cyg/bin/gcc -flags
Notice that there is no slash between e: and cyg.
So this command would successfully start cygwin gcc from the Windows shell, but halfway through the run it will error out because some component(s) of gcc will utilize the first argument of the input e:cyg/bin/gcc and unlike mingw, this is not a valid path for cygwin gcc.
This can be fixed simply by changing the command to:
e:/cyg/bin/gcc -flags
Notice the slash in between e: and cyg.
A similar gotcha is due to Windows allowing paths like e:/../folder1 as an alternative to e:/folder1. Windows does not give you an error if you are at the root folder and try to go up another folder using ...
So you could start running cygwin gcc using the command:
e:/../cyg/bin/gcc -flags
..or even:
e:/../../../../../../../../../cyg/bin/gcc -flags
However, it would fail halfway with gcc: error: spawn: No such file or directory because some component(s) of cygwin gcc would attempt to run gcc using the first argument of the command input itself, and unlike mingw, e:/../cyg/bin/gcc is not recognized as a valid path by cygwin because you are going up a folder when there's no folder to go up to.
As like above, this can be fixed by keeping the path valid:
e:/cyg/bin/gcc -flags
Make sure the source file extension is in lowercase (i.e. main.c, not main.C):
$ gcc -o main main.C
$ gcc: error: spawn: No such file or directory
$ gcc -o main main.c
$ # all good
This only refers to the case of the extension as given to the gcc, the actual source file can have the extension in whatever case you want.
Explanation: This is from my experimenting with cygwin and gcc, I don't know the actual reason for this behavior.
The issue I'm having is that gcc (and family) don't appear to be properly setup. I have a 10.7.4 machine that I just installed Xcode on (from the app store). I've done no prior development on this machine.
Working w/in Xcode seems to work fine. I can build and compile no problem. However, trying to execute gcc command line fails.
First, I gcc wasn't on my path ... no big deal. I located it and ran as:
/Applications/Xcode.app/Contents/Developer/usr/bin/gcc -dynamiclib -fno-common -o s.dylib s.c
(I'm working on a lib w/some functions...). Anyways, it fails.
s.c:1:19: error: stdio.h: No such file or directory
s.c:2:20: error: stdlib.h: No such file or directory
s.c:3:20: error: string.h: No such file or directory
Surprise! hah, well I searched my machine for stdio.h and I can't find it anywhere. Since I've been out of the OSX game for a bit, I'm assuming I'm missing something -
Basically I want to be able to continue using Xcode but I want to be able to build C/C++/etc on the command line with all the dependencies (.h) in the correct place.
Any thoughts?
There are two main ways to run the compiler from the command line: the Command Line Tools package, and xcrun.
xcrun is particularly good if you just need this occasionally. Just stick "xcrun" at the start, like you'd do with sudo:
xcrun gcc -dynamiclib -fno-common -o s.dylib s.c
This will find the correct version of gcc and set the needed directories, etc. You can specify a specific SDK with --sdk.
If you do this a lot, download and install the Command Line Tools package (Xcode>Open Developer Tool>More Tools...; it also may be available in Preferences>Downloads). This installs a full copy of everything in /usr.
Probably xcrun is not enough if you are using 10.8.
Looking in to the clang documentation I found that you need to include the system root because you do not have your libraries in the standard place but inside Xcode.
using:
xcrun gcc -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk
or:
xcrun clang -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk