long double functions, that are identical to double functions, usually
define themselves as weak references to their double counterpart.
However, the piece of assembler written for that produces
.equ <name>l, <name>
but on SuperH C-exported symbols have leading underscores. This commit
adds an SH3 exception to use instead
.equ _<name>l, _<name>
which fixes a number of long double functions.
__strong_alias is an ELF feature that is not available on Darwin/MachO.
We have openlibm_strong_reference to paper over these differences,
but we weren't using it consistently. In particular, we were still
using it to define long double -> double aliases on platforms where
these are the same type (e.g. aarch64). This didn't used to matter,
because the only such platform we supported was always Linux and
thus ELF. This patch fixes these instances thus fixing the build
on Apple Silicon.
In particular, OpenBSD already defines __GNUC_PREREQ__, __BEGIN_DECLS,
and __warn_references. Hiding the definitions behind #ifndef guards
avoids warnings when building.
While there, also modify the install target. We should make sure to
install all openlibm*.h headers. There is still some work to be done:
openlibm_fenv_*.h still depends on some additional bits. I'd propose
that we eventually create an include/openlibm_cdefs.h that contains all
of the macros we need.
Lephenixnoir
Keno Fischer