https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38354
--- Comment #10 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- This seems like an enhancement request to me. Initializers using a 64-bit function address cast to 32-bit are outside the scope of my model of constant expressions for GNU C (<http://www.polyomino.org.uk/computer/c/const-exprs-gnu.txt> - fairly old, may be out of date). It so happens that the x86_64 ABI does include a relocation for 32-bit symbol references (in fact two of them, R_X86_64_32 and R_X86_64_32S), but I don't believe GCC has that information about what relocations the target supports at present (and then there would be the question of which of those two relocations to use, though maybe that's a question for the assembler).
