Port some code to GCC, have some problems with #pragma directives

Question

I'm trying to compile this code with GCC and I have these #pragma directives that I'm trying to convert to GCC understandable instructions and I just can't figure out how:

#pragma section(".CRT$XCA", read, write)
#pragma data_seg(".CRT$XCA")        // start of ctor section
_PVFV __xc_a[] = {0};

#pragma section(".CRT$XCZ", read, write)
#pragma data_seg(".CRT$XCZ")        // end of ctor section
_PVFV __xc_z[] = {0};

#pragma data_seg()
#pragma comment(linker, "/merge:.CRT=.rdata")

I know that for creating a new section you can use __attribute__ ((section (".CRT$XCZ"))) but what about data_seg?

Answer 1

GCC uses a different and incompatible way of registering global constructors. Instead of trying to port it, you should rewrite it accordingly to the ABI used by GCC.

For the gory details, consult e.g. libgcc/crtstuff.c and libgcc/gbl-ctors.h in GCC source tree.