I am currently working on a program that is encrypting a text file. I made it in Turbo C++, using C language, but my main problem is that:
I need to run turboc++, in order for my .exe program to run. Does anybody here know a way to compile it and run it as stand-alone program?
TurboC++ is an obsolete compiler for an obsolete variant of C++ or of C. Use a recent compiler (such as GCC 8 or Clang 7; both are open source so freely available) for recent C11 or C++14 (or C++11) standards. Get rid of TurboC++ since it is obsolete (and is not a good compiler, compared to other existing ones).
If using GCC, you'll compile your C file foo.c using gcc -Wall -g -O foo.c -o foo. If using Clang, you'll compile with clang -Wall -g -O foo.c -o foo. Don't forget to enable all warnings and debug info. You'll get an executable foo which can be run without having the source code. That executable is specific to your operating system and to your instruction set architecture.
I need to run turboc++, in order for my .exe program to run.
With any good enough C or C++ compiler, you don't need the compiler to run the executable it is producing.
Don't confuse a compiler with the IDE or source code editor you'll use to write C or C++ source code. All C or C++ compilers I heard of are command line programs, that might be run from a terminal, an IDE, a good source code editor (such as emacs or vim).
If your source is in C++, that is bar.cc, use g++ -Wall -g -O bar.cc -o bar or clang++ -Wall -g -O bar.cc -o bar
Adapt these compilation commands (I'm giving those for Linux) to your operating system. On Windows, executables have a file path ending with .exe.
Of course, both GCC and Clang are able to compile and link a program made of several translation units. Learn to use some build automation tool, such as make or ninja. Such tools are driving compilation and linking commands.
If you are learning to program in C++, be aware that it is a very difficult programming language (you'll need years of efforts to master it). And notice that Linux is a very developer-friendly operating system, mostly made of free software whose source code you could study. That is why I recommend Linux for those learning C++ or C.
PS. If your teacher requires TurboC, I do recommend to have a polite discussion with him, suggesting to make your homework with GCC or Clang.
Related
I am currently programming in the C language on CLion from JetBrains from a Windows computer.
I would like to use the gcc (GNU C) compiler in order to access external libraries, like BLAS.
At this point, in order to launch the hello.c program for instance, I need to go the CMakeLists.txt file and write this:
cmake_minimum_required(VERSION 3.23)
project(ProjectName C)
set(CMAKE_C_STANDARD 99)
add_executable(ProjectName hello.c)
To compile hello.c from gcc, I would need to enter cc hello.c in the gcc terminal. As CLion has no compilation problem using CMakeLists.txt, so far, so good.
Now, I want to use the dgemv_ function for matrix multiplication. I got the dgmev.f Fortran file. To execute my program, I need to use the BLAS librairy, and write cc hello.c -lblas in gcc. However, I have no idea how to link my Fortran librairy program with my C program without gcc (which I haven't).
Thus, I would like to know how to use the gcc compiler in CLion for C99 under Windows (maybe with a Makefile script ?), or, if it's not possible, how to use this Fortran librairy program without gcc.
Here you have the complete CLion project folder on Google Drive containing all the scripts I wrote about above.
I am following the tutorial at https://littleosbook.github.io/ and wanted to understand whether or not what I have currently working is conceptually correct. In terms of where I am at, I am using macOS 10.15.7 for the development and was able to call a C function from the loader. The loader is in assembly. However, I used the Clang compiler (Apple clang version 12.0.0) to compile the C file in which the aforementioned C function is. Then, I compiled the C file to generate an object file and linked the .o file with loader.o
Is this how it should be done? Or should I be trying to firstly install gcc or clang inside the OS and have that compiler compile the C function for me?
I am now learning c language, and my school put all assignments on myth, every time we have to log in by ssh and execute command remotely.
Thus I want to download the files and execute them on my own macbook. However when I use make command to compile the files, I got errors and warnings such as :
gcc -g -O0 -std=gnu99 -Wall $warnflags -m32 -c -I. vectest.c -o vectest.o
warning: unknown warning option '-Wlogical-op'; did you mean '-Wlong-long'?
vectest.c:10:10: fatal error: 'error.h' file not found
#include <error.h>”
I googled these problems but could not find a satisfactory answer. can anyone help me solve this ? or I have to use a linux machine instead?
Indeed; compilers for various platforms (even if it's the "same" compiler, such as GCC) may have different flags and behaviors. You may be able to get it to work - you could remove the -Wlogical-op flag from $warnflags in your Makefile, but if the error.h file is a system-supplied header file, you're probably in trouble. Therefore, I suggest that you download e.g. VirtualBox and run Linux on it.
See error(3) for what this header provides. It's not specific to linux but to the GNU C library. What you COULD do is provide your own minimal implementation of these functions and write your own error.h.
You could even `#define' them to do nothing at all, but then you will probably lose some error reporting in the existing code. Maybe you could try to find a teacher understanding the problem and discuss the issue ... it's probably better to learn standard C not using any platform-specific extensions.
I recently discovered the Tiny C Compiler. For the project that I'm currently working on, performance is not a real issue, but file size is, making TCC ideal. I'm using Autotools as a build manager, and I figured that using TCC would be as simple as ./configure CC=tcc.
However, this returns checking whether the C compiler works... no. In config.log, it says configure: exit 77.
Despite all of this, setting CC=clang works fine. Is there any way to get Autotools to use TCC?
The issue appears to have been the fault of my CFLAGS. While TCC was normally able to compile programs with them, Autotools seems to have thought otherwise. Setting CFLAGS="" resolved the issue.
For future reference, my CFLAGS are -march=native -mtune=native -O2 -pipe -fstack-protector --param=ssp-buffer-size=4.
iirc tcc does not produce tiny executables - it is tcc itself that is tiny. Perhaps you're looking for gcc -Os?
stackoverflow, et. al.,
I just installed Allegro 5 on my Ubuntu machine and I see some source code for this game development tool, but I do not see specific instructions for how to compile it.
For C programs I use gcc on the terminal.
My questions are:
From what directory do I compile allegro5 programs?
What compiler options are necessary? (the normal gcc someCProgram.c -o MyProgram doesnt work)
Thank-you for reading. I have read two c books so I am not a complete noob, but I have the struggles...
All the best,
user2085446
Okay, let's put this into an answer:
If your program just consists of a single .c file, you can run gcc from the path the file is in. However, in general there's nothing wrong with invoking gcc from anywhere else as long as you get the paths right.
For linking with external libraries, you need -lmylibrary options in the compiler command, e.g. -lfreetype for the freetype library and so on.
Now, this can get a bit complicated when your libraries depend on other libraries etc. That's what the pkg-config tool is for.
When you look at the allegro wiki page, you will see the following sample command:
gcc [source file(s)] -o [output] `pkg-config --libs allegro-5.0`
The pkg-config bit will resolve the relevant -l options for you.