Fix undefined reference to __fpgetprec on i386

Closes #137

This reverts commit ebcd40f1b0378522b299bfec63e288df000b43d2.

The tests were failing to load the library on i386 due to an undefined
refe

Fix undefined reference to __fpgetprec on i386

Closes #137

This reverts commit ebcd40f1b0378522b299bfec63e288df000b43d2.

The tests were failing to load the library on i386 due to an undefined
reference to __fpgetprec, which resulted from __fpgetprec not being inlined
due to the missing definition of __GNUCLIKE_ASM and __CC_SUPPORTS___INLINE__.

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Update remaining references to bsd_cdefs.h to cdefs-compat.h.

It looks like we didn't substitute the name of the bsd_cdefs.h header
file in two source files when renaming it.

Blanket rename DLLEXPORT->OLM_DLLEXPORT

Also add DLLEXPORT in fenv.c

Fix Clang warnings on Windows

- Align DLLEXPORT in definitions and declations. There is still a few
cases left, where the declation in the compiler's complex.h disagrees
with the implementation

Fix Clang warnings on Windows

- Align DLLEXPORT in definitions and declations. There is still a few
cases left, where the declation in the compiler's complex.h disagrees
with the implementation here. For now we can't do anything about that,
but maybe should be revisited in the future.
- Fix the syntax on an .ascii directive that gcc accepted mistakingly, but
clang does not.

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Cleanup bsd_cdefs.h, merge i387 and amd64 duplicate files

Most macros were not actually used. This gets rid of warnings when
building on Linux.

Change some #ifdefs to be different than the system ones.

Enable stack protection for all ELFs, not only __linux__

Remove unused Symbol.map files.

Remove $ARCH/openlibm_fenv.h.

It seems I accidentally copied these headers twice in
d07820351bed7d16f1f0a1ae0596a2e2b6f50aaf. We should only have them in
include/.

Rename the fenv headers.

I guess the idea would be to eventually also install all of the
openlibm*.h headers, instead of just openlibm.h. Make openlibm_fenv.h
suitable for this purpose by moving all

Rename the fenv headers.

I guess the idea would be to eventually also install all of the
openlibm*.h headers, instead of just openlibm.h. Make openlibm_fenv.h
suitable for this purpose by moving all of the $ARCH/fenv.h headers next
to it.

We actually need this change to make OPENLIBM_USE_HOST_FENV_H work.
Right now it's still broken, because the "#include <fenv.h>" performed
by openlibm_fenv.h still pulls in $ARCH/fenv.h as $ARCH/ is added to the
compiler include path.

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Remove weak reference construct from fenv code.

I grepped through the FreeBSD source tree and for me, it seems to be
totally unclear why these two specific functions are weak references.
Such a cons

Remove weak reference construct from fenv code.

I grepped through the FreeBSD source tree and for me, it seems to be
totally unclear why these two specific functions are weak references.
Such a construct is commonly used by FreeBSD's threading library
(libthr) to override certain functions, but I can't find any traces of
that.

Just use the function name directly. This fixes a compiler warning as
well (-Wmissing-prototypes).

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Use more uniform style of including headers.

Put external headers before internal ones. While there, replace a lot of
occurences of "openlibm.h" with <openlibm.h>. It should be thought of as
an exte

Use more uniform style of including headers.

Put external headers before internal ones. While there, replace a lot of
occurences of "openlibm.h" with <openlibm.h>. It should be thought of as
an external header, as it is installed along with the library.

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Rename include/fenv.h to <openlibm_fenv.h>.

OpenLibm has an implementation of fenv.h internally. This may be
problematic in case you want it to build against the host system's
implementation, as it

Rename include/fenv.h to <openlibm_fenv.h>.

OpenLibm has an implementation of fenv.h internally. This may be
problematic in case you want it to build against the host system's
implementation, as it would require you to somehow take the fenv.h file
out of the compiler search path.

Simply use a different naming scheme, similar to openlibm.h and
openlibm_complex.h. If we want to build against the host's fenv.h, we
can simply add an '#include <fenv.h>' from within this header.

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Remove unneeded tests for <sys/cdefs.h>.

This test is also present in FreeBSD's <machine/ieeefp.h>. For FreeBSD
it makes sense, but for a portable math library, we cannot assume that
the system has

Remove unneeded tests for <sys/cdefs.h>.

This test is also present in FreeBSD's <machine/ieeefp.h>. For FreeBSD
it makes sense, but for a portable math library, we cannot assume that
the system has a header file like <sys/cdefs.h> and that it uses a
common header guard.

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Fix #35

Export ldexp aliases on Windows

skip END and add .drectve export in assembly versions

uncomment __strong_reference definition from cdefs-compat.h

use weak references in place of strong references

Export ldexp aliases on Windows

skip END and add .drectve export in assembly versions

uncomment __strong_reference definition from cdefs-compat.h

use weak references in place of strong references on Mac

add DLLEXPORT to all strong references

Fixes Julia issue #6777

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work around msvc bug where .model must be on its own line or it forgets about it

add win64 compat definitions also

normalize __WIN32__ to _WIN32, which is defined by all Windows compilers

provide fegetround & family functions on win64

Enable stack protection in all .S files

Hardware stack protection is required by most distributions.
See https://wiki.gentoo.org/wiki/Project:Hardened/GNU_stack_quickstart

provide fenv functions on windows

add DLLEXPORT to i387 and amd64 assembly (win32 target) and ld80/ld128 files

fix calling convention on win64, mostly passing the numerical tests