Could I get a step by step on how to compile my file.c using Tiny C Compiler and Windows prompt?
Some questions I already have:
Where do I stick all TCC files from the download?
Do I have to compile stdio.h to use the printf function? (I'd like to do a 'Hello World').
This is what my file.c looks like:
// #include <stdio.h> // for printf
int main(void){
printf("Hello Eric. You've compiled and run the program! \n");
}
Thanks,
EDIT 1
So far I'm running it and getting the error: include file 'stdio.h' not found.
you put the files wherever you like.
no, you do not need to compile stdio.h in order to use the printf() function.
the tcc-distribution (tcc-0.9.25-win32-bin\tcc) consists of this:
tcc.exe
tiny_impdef.exe
tiny_libmaker.exe
include\
stdio.h ...
lib\
libtcc1.a ...
doc\
examples\
if you do not tear that order apart, tcc should work out of the box (i compiled a hello.c seconds ago). if you separated the files or something else does not work:
% tcc.exe -Ipath/to/include/folder/of/tcc input.c -L/path/to/lib/folder/of/
by looking at the source code of tcc i found this:
/* on win32, we suppose the lib and includes are at the location
of 'tcc.exe' */
char path[1024], *p;
GetModuleFileNameA(NULL, path, sizeof path);
p = tcc_basename(normalize_slashes(strlwr(path)));
so, per default it assumes the libs and the headers to be in the place right next to the tcc.exe.
Related
I have some symbols collision in a C program, some previous search leads to this objcopy the problem is my workflow is a golang cgo one so I don't deal myself with the .o and .a (I know I could be the goal of my lib is to be used by other people so I can't have a custom golang workflow.).
More info of what I need:
I have a bunch of functions doing various things in my go lib, this code is autogenerated and can't be predicted, they sometimes collide (have the same name) with other function later in the build pipeline, so I would like all the C function in my go lib to be renamed, this can either happend at build time using the standart cgo process (basicaly build each file first with gcc and then link them all up) or after the autogeneration of the code (I guess I could run a preprocessor renaming all the functions and there calls in the source but I weren't able to find one).
What I've tried already :
#pragma extern_prefix
This and this seems very promising but whatever I try I can't get it to works :
// test.c
#include <stdio.h>
#pragma extern_prefix "TestPrefix"
int test() {
printf("Hello, World!\n");
return 0;
}
#pragma extern_prefix ""
int main() {
return test();
}
Shell output :
$ gcc test.c -o test && ./test && nm -an test | grep test
Hello, World!
0000000000000000 a test.c
0000000000001149 T test
Unlike what I expected the test symbol isn't prefixed like I expect (with my understanding the symbol should be TestPrefixtest).
I'm trying to compile and link a simple program to a DOS .com file using Turbo C compiler and linker. By that I try the simplest C-program I can think of.
void main()
{}
Are there command line arguments to link to com files in the Turbo C Linker?
The Error Message I get from the Linker is the following:
"Fatal: Cannot generate COM file: invalid entry point address"
I know that com files need entry point to be at 100h. Does Turbo C have an option to set this address?
It has been a long time since I have genuinely tried to use Turbo-C for this kind of thing. If you are compiling and linking on the command line separately with TCC.EXE and TLINK.EXE then this may work for you.
To compile and link to a COM file you can do this for each one of your C source files creating an OBJ file for each:
tcc -IF:\TURBOC3\INCLUDE -c -mt file1.c
tcc -IF:\TURBOC3\INCLUDE -c -mt file2.c
tcc -IF:\TURBOC3\INCLUDE -c -mt file3.c
tlink -t -LF:\TURBOC3\LIB c0t.obj file1.obj file2.obj file3.obj,myprog.com,myprog.map,cs.lib
Each C file is compiled individually using -mt (tiny memory model) to a corresponding OBJ file. The -I option specifies the path of the INCLUDE directory in your environment (change accordingly). The -c option tell TCC to compile to a OBJ file only.
When linking -t tells the linker to generate a COM program (and not an EXE), -LF:\TURBOC3\LIB is the path to the library directory in your environment (change accordingly). C0T.OBJ is the C runtime file for the tiny memory model. This includes the main entry point that you are missing. You then list all the other OBJ files separated by a space. After the first comma is the output file name. If using -t option name the program with a COM extension. After the second comma is the MAP file name (you can leave the file name blank if you don't want a MAP file). After the third comma is the list of libraries separated by spaces. With the tiny model you want to use the small model libraries. The C library for the small memory model is called CS.LIB .
As an example if we have a single source file called TEST.C that looks like:
#include<stdio.h>
int main()
{
printf("Hello, world!\n");
return 0;
}
If we want to compile and link this the commands would be:
tcc -IF:\TURBOC3\INCLUDE -c -mt test.c
tlink -t -LF:\TURBOC3\LIB c0t.obj test.obj,test.com,test.map,cs.lib
You will have to use the paths for your own environment. These commands should produce a program called TEST.COM. When run it should print:
Hello, world!
You can generate COM file while still using IDE to generate EXE. Following worked on TC 2.01. Change memory model to Tiny in the options, then compile the program and generate EXE file, then go to command prompt, and run EXE2BIN PROG.EXE PROG.COM. Replace PROG with your program name.
Your problem is about "entry point"
some compiler or linker can recognize void main() like entry point omiting a return value but no all of them.
You shoud use int main() entry point instead for better control of app and compiler can recognize main function as entry point
example:
int main() {
/* some compiler return 0 when you don't for main,
they can ask for return value */
}
from geekforgeeks:
A conforming implementation may provide more versions of main(), but they must all have return type int. The int returned by main() is a way for a program to return a value to “the system” that invokes it. On systems that doesn’t provide such a facility the return value is ignored, but that doesn’t make “void main()” legal C++ or legal C. Even if your compiler accepts “void main()” avoid it, or risk being considered ignorant by C and C++ programmers.
In C++, main() need not contain an explicit return statement. In that case, the value returned is 0, meaning successful execution.
source: https://www.geeksforgeeks.org/fine-write-void-main-cc/
Inspired by this PCG challange: https://codegolf.stackexchange.com/q/61836/31033
I asked my self, if one would try to leave as few trace as possible when compiling such kind of tool (no matter of a browser or something else), is there some way (aimed for gcc/clang as this probably are the preinstalled commandline compillers in such a working enviroment) to hand over source code to the compiler as command line argument or equal mechanism, without need for the source code beeing saved as *.c file, as the user would usually do?
(ofcourse the compiler will produce temp files while compiling, but those probably won't get scanned.)
At least gcc can as it is able to read source from the standard input. You can also use Unix here string bash construction :
gcc -xc - << "int main() { exit(0); }"
or here file sh construction :
gcc -xc - <<MARK
int main() {
exit(0);
}
MARK
----EDIT----
You can also imagine using cryptography to encode your source, uncipher the content on the fly and inject the result to the standard input of gcc, something like:
uncipher myfile.protected | gcc -xc -
Ok so I am doing a final project for one of my classes and trying to do a bit extra and create multiple files to work with. I am coding inside of CodeBlocks. So far I have a main.c, levels.c, and levels.h for my files. Inside of the levels.c levelOne function, I put the printf statement as a test to make sure I could have the two files work with each other before I went forward in my coding. I got a "undefined reference to 'levelOne' when I compiled and ran the program.
Inside my main.c file:
#include <stdio.h>
#include <stdlib.h>
#include "levels.h"
int main()
{
levelOne();
return 0;
}
Inside my levels.h file:
#ifndef LEVELS_H_INCLUDED
#define LEVELS_H_INCLUDED
void levelSelect(char c);
void levelOne();
void levelTwo();
void levelThree();
void levelCustom(int difficulty);
#endif // LEVELS_H_INCLUDED
Inside my levels.c file:
void levelOne()
{
//level scope of 1 to 10
srand(time(NULL));
int randomNum = (rand() % 9)+1);
printf("the random number is: %i\n", randomNum);
}
levels.c is not getting passed into the compiler, are you sure you have included levels.c in the whole project? If not it will not link. You need a project if you want to compile multiple files. In CodeBlocks, the sources and the settings for the build process are stored in a project file <name>.cbp
Here is the User Manual
gcc levels.c main.c should link successfully. gcc main.c will only compile one file and try and link to create final executable and levelOne() will not be found. since it is in file levels.c
You need to include levels.h in levels.c as well or if a function (physically) above levelOne calls it, it is undefined.
Then compile it with gcc -Wall *.c -o myapp to compile and link all of the c files in that directory into myapp (or you can name them individually) with (almost) all warnings enabled. This is provided you have it in its own directory.
Once you get into larger projects with more code, you can compile individual .c files into .o object files with gcc -Wall -c somecode.c and then link all the objects with gcc *.o -o myapp. If it gets really large, you'll want a build system to help with rebuilding objects only when its code (or dependent code) changes (such as Makefiles, waf, and dare I say autotools).
I had this exact same problem, the solution is easy. Right click on levels.c and select properties. A properties window should come up select the "Build" tab tick compile file, link file, and in the box check debug and release. This should fix your problem.
Don't make the mistake of doing this with a header file because it will give you a "...h.gch: file not recognized: File format not recognized.." error.
Looking into learning C. As I understand it when I say #include <stdio.h> it grabs stdio.h from the default location...usually a directory inside your working directory called include. How do I actually get the file stdio.h? Do I need to download a bunch of .h files and move them from project to project inside the include directory? I did the following in a test.c file. I then ran make test and it outputted a binary. When I ran ./test I did not see hello print onto my screen. I thought I wasn't seeing output maybe because it doesn't find the stdio.h library. But then again if I remove the greater than or less than signs in stdio the compiler gives me an error. Any ideas?
I'm on a Mac running this from the command line. I am using: GNU Make 3.81. This program built for i386-apple-darwin10.0
#include <stdio.h>
main()
{
printf("hello");
}
Edit: I have updated my code to include a datatype for the main function and to return 0. I still get the same result...compiles without error and when I run the file ./test it doesn't print anything on screen.
#include <stdio.h>
int main()
{
printf("hello");
return 0;
}
Update:
If I add a \n inside of the printf it works! so this will work:
#include <stdio.h>
int main()
{
printf("hello\n");
return 0;
}
Your code should have preferably
printf("hello\n");
or
puts("hello");
If you want to know where does the standard header file <stdio.h> comes from, you could run your compiler with appropriate flags. If it is gcc, try compiling with
gcc -H -v -Wall hello.c -o hello
Pedantically, a standard header file is even not required to exist as a file; the standard permits an implementation which would process the #include <stdio.h> without accessing the file system (but e.g. by retrieving internal resources inside the compiler, or from a database...). Few compilers behave that way, most really access something in the file system.
If you didn't have the file, you'd get a compilation error.
My guess is the text was printed, but the console closed before you got the chance to see it.
Also, main returns an int, and you should return 0; to signal successful completion.
#include <header.h>, with angle brackets, searches in standard system locations, known to the compiler-- not in your project's subdirectories. In Unix systems (including your Mac, I believe), stdio.h is typically in /usr/include. If you use #include "header.h", you're searching subdirectories first and then the same places as with <header.h>.
But you don't need to find or copy the header to run your program. It is read at compilation time, so your ./test doesn't need it at all. Your program looks like it should have worked. Is it possible that you just typed "test", not "./test", and got the system command "test"? (Suggestion: Don't name your programs "test".)
Just going to leave this here : STILL! in 2018, December... Linux Mint 18.3
has no support for C development.
innocent / # cc ThoseSorts.c
ThoseSorts.c:1:19: fatal error: stdio.h: No such file or directory
compilation terminated.
innocent / # gcc ThoseSorts.c
ThoseSorts.c:1:19: fatal error: stdio.h: No such file or directory
compilation terminated.
innocent / # apt show libc6
(Abbreviated)::
Package: libc6
Version: 2.23-0ubuntu10
Priority: required
Section: libs
Source: glibc
Origin: Ubuntu
Installed-Size: 11.2 MB
Depends: libgcc1
Homepage: http://www.gnu.org/software/libc/libc.html
Description: GNU C Library: Shared libraries
Contains the standard libraries that are used by nearly all programs on
the system. This package includes shared versions of the standard C library
and the standard math library, as well as many others.
innocent / # apt-get install libc6-dev libc-dev
So, magic... and a minute later they are all installed on the
computer and then things work as they should.
Not all distros bundle up all the C support libs in each ISO.
Hunh.
hardlyinnocent / # gcc ThoseSorts.c
hardlyinnocent / # ./a.out
20
18
17
16
... ... ...