ladybird/Libraries/LibC/crt0.cpp
Andreas Kling c74e4d0c80 LibC: Pass the environment as third argument to main()
After some very confused debugging, I discovered that GNU make has a
main() function with this signature:

    int main(int argc, char** argv, char** envp)

Apparently this is a non-standard but widely supported thing, so let's
do the same in Serenity so make works as expected.

This fixes an issue where you had to do "make PATH=..." instead of make
just picking up PATH from the environment. :^)
2019-09-12 21:43:32 +02:00

55 lines
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C++

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
extern "C" {
int main(int, char**, char**);
__thread int errno;
char** environ;
bool __environ_is_malloced;
void __libc_init()
{
void __malloc_init();
__malloc_init();
void __stdio_init();
__stdio_init();
}
int _start(int argc, char** argv, char** env)
{
environ = env;
__environ_is_malloced = false;
__libc_init();
extern void _init();
_init();
extern void (*__init_array_start[])(int, char**, char**) __attribute__((visibility("hidden")));
extern void (*__init_array_end[])(int, char**, char**) __attribute__((visibility("hidden")));
const size_t size = __init_array_end - __init_array_start;
for (size_t i = 0; i < size; i++)
(*__init_array_start[i])(argc, argv, env);
int status = main(argc, argv, environ);
exit(status);
return 20150614;
}
[[noreturn]] void __cxa_pure_virtual()
{
ASSERT_NOT_REACHED();
}
void __cxa_atexit()
{
}
}