Jeffrey Walton wrote: > > If I recall correctly, those old PowerMac use 128-bit floats from > > IEEE754 by default. > > > > I think you should build with `-mlong-double-64` on the old PowerMacs.
This advice would work for a program; it does not work for a library or for Gnulib. The reason is that '-mlong-double-64' changes the ABI. This means, in particular, the program could no longer pass 'long double' values to *printf (because *printf in libc is compiled with the original ABI). Sevan Janiyan wrote: > Thank you for the hint, that did the trick on 10.4 (G5) & 10.5 (G4) > PASS test-float (exit status: 0) > > Should m4/float_h.m4 be modified to pass -mlong-double-64 on > Darwin/powerpc or it's left to the operator? It can't, because that's an option that changes the ABI. Even compiler options that don't change the ABI, like -mieee-with-inexact on Linux/alpha, cannot be enforced, because we don't control (and shouldn't dictate) the compiler option choices of the package that uses Gnulib. Bruno
