-mlong-double-* used in libgcc/config/t-* files

[Zdenek Sojka]

Hello,

tmake file libgcc/config/i386/t-linux [1] enforces -mlong-double-80 for libgcc compilation.

From my point of view, it can only cause problems:
- if you are linking with C binaries compiled with -mlong-double-80, everything is OK
- if you are linking with C binaries compiled with -mlong-double-128, the linking goes OK, but the binaries won't work, because libgcc and your binary has different "long double" size
I haven't investigated how the compiler behaves when configured with --with-long-double-128, or how C++ linking works.

What am I missing?


Thanks,
Zdenek

[1] http://repo.or.cz/official-gcc.git/blob/HEAD:/libgcc/config/i386/t-linux