I have CodeBlocks 13.12 and I want to compile a c99 code on it. Is there any way I can do this. If there is any other way to compile a c99 code, that is okay as well.
Thanks!
From the option of add new flag I added -std=c99 in the tab for compiler flag and it works.
Related
I am using codeblock 13.12 and it uses mingw (GCC 4.7 & 4.8 Series)
It supports call by reference (func1(int &a)) eventhough I am selecting C project and not CPP project. If I am not mistaken, there is no concept of call by reference in C and everything is call by value even if it is making use of pointers.
My question is how to use C only features? Any settings for this? I saw that in toolchain it is using mingw32-gcc.exe for c compilations.
How to know which compiler version (Like C11, C99 etc) it is really using?
Name your files with an extension of .c. And definitely not .cc or .cpp
Compile with gcc as the command line, not g++
And if in doubt, use the -std= command line parameter to force the flavor of C you want (e.g. -std=C90, -std=C99, or even -std=C11 ). There's also -ansi.
Also, a cheap and dirty way to validate if your code is getting compiled as C and not C++ is to add this block of code within your source code. If it's C++, then the compiler will generate an error.
#ifdef __cplusplus
int compile_time_assert[-1];
#endif
Is there any way to compile C code with c89 standard NOT c99 in Xcode (or another way with terminal)?
I've searched in Xcode settings but I didn't find any way to choose compiler or standard.
You should add -pedantic-errors to Other C flags in your project settings, like so:
Of course, don't forget to set the C language dialect to C89 as well.
This will give you the appropriate compile time errors when you try to compile something that is not valid C89.
Optionally, if you want Xcode to compile your code regardless of incompatibilities, but only give you yellow warnings at the problematic lines, use -pedantic instead of -pedantic-errors.
In a nutshell, these flags make the compiler stick to the language standard more strictly, as opposed to the default behavior, which is to attempt compiling the code any way possible.
I hope this helps :)
Source
(even though they mention this in the context of GCC, but the same flags apply for Clang as well)
We required to use the CLANG compiler with the C99 standard and AddressSanitizer (ASAN) turned on, however I cannot figure out how to change these settings using the csupport plugin.
I have read the relevant sections of the help file but I'm still lost, any help would be appreciated.
Change the global variable g:C_CCompiler to clang and set the flags using g:C_CFlags
More information can be found here
I am trying to compile some C code on a beagleboard xm. I try to compile, but I get the error: undefined reference to 'isfinite' which is in the math.h library. This code compiles perfectly in all my other computers, and I do include -lm in my makefile.
I suspect that it may be my compiler, maybe it is an over version? On the beagleboard it's version 4.3.3, but on my computer it's 4.7.3, but I don't know how to get a later version. I thought opkg would automatically get the latest available.
Any ideas why this may be happening?
The function infinite() is part of C99. Your compiler is by default using an older version of the C language. You need to compile with the the flag -std=c99 to enable this macro.
`gnu89' GNU dialect of ISO C90 (including some C99 features). This is
the default for C code.
http://gcc.gnu.org/onlinedocs/gcc-4.3.3/gcc/C-Dialect-Options.html
isfinite is part of the C++11 standard and gcc 4.3.3 is to old to know that. Try
int finite(double x); or int finitef(float x);.
I recently realized that I am not even in C99 mode after receiving the compile error
'for' loop initial declarations are only allowed in C99 mode
I found some advice on how to get to C99 via a quick search which has told me to go to Projects -> Properties... But alas, it is greyed out and I am not sure that is even the correct way to fix it (probably not available because my file is not a project, it is a normal source file). I have also seen a lot of similar questions saying to enable C99 mode so I have looked inside the compiler flags menu, but I cannot see anything about C99. I have tried some other flags such as In C Mode, support all ISO C90 programs..., but after I set this flag, I got more errors than I had before which seem to appear whenever the compiler finds comments inside main().
Note: Please don't just say to initialize the counter outside the for loop.
Update: While trying to compile outside of codeblocks with gcc, I tried
gcc -O2 -std=C99 filename.c, but received an error:
unrecognized command line option "-std=C99"
I use 64-bit Windows 7, CodeBlocks10.05, and GNU gcc.
For future reference, type in the flag -std=c99 in settings->compiler->other options which is not case-sensitive, however when compiling in a terminal the flag is case-sensitive. Thanks chris!