I am compiling a fortran code using gfortran, it is giving me an error stating
2.6/cp2k/tools/build_libsmm/run_tiny_dnn/output_linux.gnu/"//trim(filename)
1
Error: Syntax error in OPEN statement at (1)
I am not sure what could have triggered this. BTW, there was no issue with ifort and the line that triggered is
open(unit=unit,file=\"`pwd -P`/$(OUTDIR)/\"//trim(filename))
It would be great, if someone has any pointers to fix this issue.
The open() statement in fortran needs the relative path to the file to open from the position of where the compiled fortran program will resort. So your code should look similar to this with dir the relative path to your output files.
! parameter declaration
integer,intent(in)::unit
char(len=512),intent(in)::dir,filename
char(len=512)::relPath
! -----------------------------------------------------------------------
relPath=trim(dir)//'/'//trim(filename)
open(unit=unit,file=trim(relPath),action='readwrite',possition='append')
I always add the action and position to the open command to make sure that you do the right things with your files.
Related
I am writing a c++/CUDA code with Visual Studio 2015 to generate a mex file to integrate with MATLAB.
When I run the mex file through the MATLAB console and then try to compile it again on VS I get this error:
LINK : fatal error LNK1168: cannot open filename.mexw64 for writing
Closing the MATLAB and opening the programme again solves the problem.
Does anyone know any solution which not involves closing the MATLAB?
MEX-files are DLLs (on Windows, shared objects on other systems). When first run, MATLAB links to them, but doesn't unlink unless explicitly told to (or quitting MATLAB of course).
Typing
clear mex
in MATLAB will unlink all MEX-files. See the relevant documentation.
But note that your MEX-file can call mxLock, which will cause it to be locked in memory and then it will not be cleared by clear mex. If you use this function in your MEX-file, you need to include a facility to have your MEX-file call mxUnlock. I usually add a syntax such as mymexfile --unlock: the MEX-file checks to see if it is called with one argument, and that argument is a string, and the string matches "--unlock", then it calls mxUnlock.
I have two short files located in the same directory. The contents of each are shown below.
File test.cpp contains:
int main()
{
#include <test.h>
}
File test.h contains:
syntax_error
Upon compiling test.cpp with either g++ or clang++, I get an error which is expected.
test.cpp:3:11: error: 'test.h' file not found with <angled> include; use
"quotes" instead
#include <test.h>
^~~~~~~~
"test.h"
However, I also get a second error which seems to contradict the first error.
In file included from test.cpp:3:
./test.h:1:1: error: use of undeclared identifier 'syntax_error'
syntax_error
^
Essentially, the first error reports that the compiler cannot find the file test.h, and the second reports a syntax error in the file that the compiler reported it could not find.
These are the only two errors generated.
I understand why the compiler reports the first error and that I should use quotes with #include in this case. Why, though, does the compiler say it cannot find the file when it clearly has found it? And, why would it continue to report errors in the "unfound" file?
This is a feature, not a bug.
The idea is that if the error is trivial (like a missing semicolon), then the compiler will try to continue compiling as if you had already fixed the error. This enables you to fix multiple errors in one go. This is especially useful when compiling your code takes a long time.
Imagine fixing a missing semicolon, recompiling for five hours, just so that the compiler finds another missing semicolon. And then you have to recompile again. That would be very frustrating, no?
Basically, the compiler will try to recover from any errors as far as it is able to, to be able to report as much errors as possible. Most compilers have a flag for this.
Why, though, does the compiler say it cannot find the file when it clearly has found it?
The compiler found the file yes, that's why it gave you a hint to use "" instead of <>. If it hadn't, it might not have given you the hint. Still, the compiler is not allowed to compile your code correctly, because your code is ill-formed.
As an analogy, just because the compiler found a missing semicolon, that doesn't mean that it can just compile the code with that missing character (if it tries to be Standards compliant). It will however recover and try to find other errors, if any.
How to fix the above error ? I am trying to build my code on IAR embedded workbench through makefile. While building, it throws the above error.
I think more details need to be specified. If you can paste the full error you got when compiling the code, that will help. Also compiling error must be referring to some source file with a specified line number also....It will be helpful if you can paste the snippet around the line of error from the source file.
I've got an update function in my game that contains the following code:
void DrawMiniFPSCounter();
DrawMiniFPSCounter();
The DrawMiniFPSCounter() function is declared in a file called miniFPSCounter.cpp, which is part of the build target (I'm using Xcode). When building, I get a linker error saying that the DrawMiniFPSCounter symbol cannot be found. I've tried removing the declaration above and just calling DrawMiniFPSCounter() but that results in a 'symbol not found' error during compilation. Why would the linker have trouble finding this symbol? Is it something to do with the order in which symbols are resolved in the project?
EDIT: I ran the command nm hrMiniFPSCounter.o | grep Draw in my build directory, and got the following output:
00000000 T __Z15DrawMiniCounteriiiii
0002d040 S __Z15DrawMiniCounteriiiii.eh
00000a00 T __Z18DrawMiniFPSCounterv
0002d148 S __Z18DrawMiniFPSCounterv.eh
00000560 t __ZL9DrawDigitiiib
0002d128 s __ZL9DrawDigitiiib.eh
is this normal? Why the extra characters on the end of the function names?
In my experience most common "errors":
Was the file (really) compiled?
Was it (really) linked correctly?
Did you give the function the name you thought you did?
new Namespace issues :)
Are you sure that the miniFPSCounter.cpp file is compiled (/have been incouded in the project in the right way)? I guess what you are experiencing could be caused by a few different things,but in lack of more information I would say: Try to make sure that the cpp file is being compiled (maybe introduce a few syntax errors which would give rise to a compilation error if it is indeed compiled) and when you are sure about that, you can start checking for other stuff (suchas that it is being linked correctly, etc)
Edit: Putting checklist on top.
I'm getting this compilation error:
fatal error: can’t create precompiled header f: Text file busy
compilation terminated.
This is a very mysterious one, since i get it only once in a while..
Where do i go wrong?
ETXTBSY is a standard errno value, the best explanation I've found being:
An attempt to execute a file that is currently open for writing, or write to a file that is currently being executed. Often using a debugger to run a program is considered having it open for writing and will cause this error. (The name stands for "text file busy".)
So, you might still be executing the program the compiler is trying to recreate/update...?