riscv: cleanup architecture macro checks

* We really should get out of the habbit of making up
our own architecture defines.
* __riscv with an additional __riscv_xlen is the
standard that developed... let's just roll with it.

Change-Id: Ieb777d48340ae25a6d66f66133afa0ec5c6da9b6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4402
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

m68k: really add fenv from musl-1.1.24

Somehow the first review merged only the commit log.

FreeBSD doesn't have m68k anyway, so use fenv from musl with as less
changes as possible.

Change-Id: I6372af6679e6773fbb6bf4c8b5b30512971a97a6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3161
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>

riscv64: Add missing (slightly modified) fenv.h from FreeBSD

* A few tips for future folks follows.
* fenv.h gets wrapped in our buildtools
* If anything in the arch fenv.h "doesn't work" buildtools
will silently fail early on (autotools HAVE_FENV_H)

Change-Id: Icae064fde42af3bbed5ea2eadfaa8c18c677e6a6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2164
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

Add missing fenv.h for sparc.

Borrowed from FreeBSD with some changes to get it building.
Now we need to rebuild the gcc package...

Change-Id: I6b8dfd7fb6ca912c76e2ff10fbe01ad583a09aec
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2131
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

ARM64: Initial changes so we can compile GCC toolchain

Signed-off-by: Jaroslaw Pelczar <jarek@jpelczar.com>
Change-Id: I0859d0619d601efd003472e2846d2f980ee2e457
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1799
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Change all references to "__INTEL__" to "__i386__".

They are functionally identical, but the former is a BeOS/Haiku-specfic
macro that we include in the compiler specs, and the latter is defined
by GCC.

arch: Cleanup of __ARM__ checks

* gcc 7.x defines __arm__ and __ARM__ (and others)
* clang defines __arm__ and __arm
* cleanup a few related ifdef vs if macros

Change-Id: I5da4bafac590f6fa3e10e543688001c2449f840d

Updated x86_64 fenv.h and added fenv.c.

Patch by kaliber to fix some compiling errors with clang. Removed the #include <iostream> part, but otherwise not modified.
See http://clang.llvm.org/compatibility.html#c++ why it is needed. Note that HashMap.h Key and Value are typenames as well.
Afaict this is correctly done, builds and runs on gcc4. This fixes #5892.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37550 a95241bf-73f2-0310-859d-f6bbb57e9c96

Patch by Nathan Mentley:
* Added a few header files in headers/posix/arch that'll allow for an x86_64
haiku target to be compiled. fenv.h is src/lib/msun/amd64/fenv.h from
freebsd.
* configure: Added support for x86_64 arch when running
build_cross_tools_gcc4.
* config[_build]/HaikuConfig.h, BuildSetup: Added x86_64 recognition.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36794 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added FreeBSD fenv implementation - tested with dmd port, seems that it works

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35437 a95241bf-73f2-0310-859d-f6bbb57e9c96

Updated x86_64 fenv.h and added fenv.c.

Patch by kaliber to fix some compiling errors with clang. Removed the #include <iostream> part, but otherwise not modified.
See http://clang.llvm.org/compatibility.html#c++ why it is needed. Note that HashMap.h Key and Value are typenames as well.
Afaict this is correctly done, builds and runs on gcc4. This fixes #5892.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37550 a95241bf-73f2-0310-859d-f6bbb57e9c96

Patch by Nathan Mentley:
* Added a few header files in headers/posix/arch that'll allow for an x86_64
haiku target to be compiled. fenv.h is src/lib/msun/amd64/fenv.h from
freebsd.
* configure: Added support for x86_64 arch when running
build_cross_tools_gcc4.
* config[_build]/HaikuConfig.h, BuildSetup: Added x86_64 recognition.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36794 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added FreeBSD fenv implementation - tested with dmd port, seems that it works

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35437 a95241bf-73f2-0310-859d-f6bbb57e9c96