https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77894
--- Comment #3 from nsz at gcc dot gnu.org --- currently --enable-gnu-indirect-function enables its use in gcc target libs like libatomic which breaks if the libc has no support for it. (In reply to Florian Weimer from comment #2) > (In reply to nsz from comment #1) > > the ifunc abi still has many problems and i don't think it's possible to > > detect > > dynamic linker support for cross compilation so if it is enabled do it only > > if > > the default libc is glibc (e.g. on linux musl, bionic and uclibc does not > > plan to implement it). > > Will GCC generate IFUNCs although the attribute is never used? > > If it is harmless to enable it, I'd suggest to do so unconditionally, so > that people can cross-build glibc on any Linux system using the system > compiler. currently --enable-gnu-indirect-function enables ifuncs in gcc target libs like libatomic, which breaks if the libc has no support for it (i think this is a significant abi commitment between gcc and libc which is not justified).
