LibTCC demo - usage example for live c code compilation & execution

libtccdemo.c

#include <stdio.h>
#include <stdlib.h>
#include <libtcc.h>

void callme(int x) {
    printf("hello, %d\n", x);
}

void error_func(void * user, const char * msg) {
    printf("TCC Error: %s\n", msg);
    exit(1);
}

int main(int argc, char ** argv) {
    int err;
    TCCState * s = tcc_new();
    tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
    tcc_compile_string(s, "void callme(int); int main() { callme(42); }");
    tcc_set_error_func(s, 0, error_func);
    tcc_add_symbol(s, "callme", callme);
    tcc_run(s, argc, argv);
    tcc_delete(s);
}

Thanks llandsmeer for the example! It shows that it's possible to compile a code in run time and run it. Kind of being equivalent to the "eval" in some scripting languages.

Here is what I did to get it compiled and run (YMMV).

1. Checked out the source code of tcc (link here),

2. untar and build it with ./configure; make

3. cd tcc-0.9.27

4. sudo mkdir /usr/local/lib/tcc

5. sudo cp libtcc*.c /usr/local/lib/tcc

6. Compile the above example code (put in a file called testme.c)
   gcc -I . testme.c -L . -ltcc -ldl

7. ./a.out