MSVC has ability to specify PE segment for data (using #pragma(section) and __declspec(allocate)). This allows to write functions which are automatically invoked before main() starts. Detailed description is http://stackoverflow.com/questions/1113409/attribute-constructor-equivalent-in-vc (http://stackoverflow.com/questions/1113409/attribute-constructor-equivalent-in-vc) (and it works for me, with a small fix). I use it to implement easy to use C tests. C++ uses this mechanism to invoke constructors for global objects.
My questions:
1. Is there similar capability in Pelles C?
2. Is there a way to have pragmas as part of macros? MSVC has __pragma for this purpose.
PellesC is a c99/c11 C compiler.
#include <stdio.h>
#include <stdlib.h>
static void initialize(void);
static void finalize(void);
#pragma startup initialize()
#pragma exit finalize()
static void finalize(void)
{
printf( "finalize\n");
}
static void initialize(void)
{
printf( "initialize\n");
atexit( finalize);
}
int main( int argc, char** argv)
{
printf( "main\n");
return 0;
}output:initialize
main
finalize
finalize
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To answer my second question, about __pragma equivalent: there's C99 _Pragma("..") in Pelles C. Unfortunately it is buggy.