libroot: Replace most of libm with musl's.

The glibc libm code was showing its age, and has recently been
the subject of a number of tickets about its inaccuracy.
Additionally, some developers have complained about
how convoluted the headers are, and thus how hard it is
to add support for new architectures (and how flaky
the support for the existing architectures is.)

So, with this commit, nearly the entire glibc libm has been
gutted and replaced with the one from musl 1.1.24.

The complex functions from glibc are retained (as they
are more mature than musl's), as are some glibc-internal
libm functions.

This also has the advantage that these functions are
actually using our <math.h>, whereas GCC used its own,
which was rather dangerous for obvious reasons.

Additionally, the new math functions are always compiled
with GCC 8 (even on x86_gcc2), as it seems GCC 2 does
not quite understand some of the union-aliasing they
use (a lot of which was added in C99, I suppose.)
FFmpeg on x86_gcc2 is already compiled with GCC 8
and that has so far worked out well, so there should
not be any problems caused by this.

I did verify that ARM and PPC at least still compile,
though other architectures may require a bit more work
(they are not bootstrapped so I could not do much.)

Should fix #14933 among other issues.

Change-Id: Ifeea0ddab23a8d0480fc26dece1b0192afc263bd

glibc: cleanup long double support

- Add 128 bit long double support from current glibc and a few headers
they need
- Move the existing 80 bit float support in a sub directory of generic,
it is not universal to all archs (see file added in docs/develop/arch).
Also include some new .h files for x86 that are needed after these
changes (from newer versions of the glibc).
- Adjust Jamfiles for m68k, x86 and x86_64 to use the 80bit format
- Do not adjust arm jamfiles, it was wrongly using 80bit long double and
should be fixed to use 64bit instead (which means the double functions
can be used with aliases)
- Do not adjust powerpc jamfiles, because it uses yet another format and
we build it without long double support anyways.

Note that I moved only the files that were creating compile errors,
quite likely more of the s_* and e_* files need to be moved to the
specific directories, see glibc list here:

https://sourceware.org/git/?p=glibc.git;a=tree;f=sysdeps/ieee754/ldbl-128
https://sourceware.org/git/?p=glibc.git;a=tree;f=sysdeps/ieee754/ldbl-96

Change-Id: Ic2d8a454ba9a3b99638e4fbb63daf02df0fea403
Reviewed-on: https://review.haiku-os.org/c/1143
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

libroot: added a complex.h header based on ...

http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/complex.h.html
* added missing parts from glibc.
* x86_64 was already complete, x86 was missing a few functions.
* should help with #12202, provided that the gcc4 buildtools are rebuilt.

Add s_tanhl.c to x86 jamfile

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>

Add s_ldexpl.c to x86 jamfile

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>

Add glibc ilogbl implemenation

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>

More work towards hybrid support

* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).

Stop using glibc's asm strlen and use our own.

Mostly done because olta want less dependency on glibc.
It should also make porting a tiny bit simpler.

Testresults, mean values on Haiku from libMicro:
* with glibc: strlen_10: 0.03859S, strlen_1k: 1.67075S.
* with strlen.cpp: strlen_10: 0.03854S, strlen_1k: 1.66938S.

So at least on my machine it's possible to beat glibc ;)

Fixed math.h part of #2696

* added lgammal_r wrapper
* removed gamma_r and gammaf_r functions from math.h

Introduce __set_errno() throughout libroot.

* add errno_private.h, which defines the __set_errno() macro with
and without tracing
* instead of setting errno manually, all libroot's code now invokes
__set_errno(), which makes it much easier to trace changes to errno
* redirect glibc's use of __set_errno() to our own version

Applied a patch by MrSunshine that adds modfl() - thanks!

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37904 a95241bf-73f2-0310-859d-f6bbb57e9c96

added fmin, fma, fmax from glibc (ticket #5114).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34652 a95241bf-73f2-0310-859d-f6bbb57e9c96

added missing posix functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33867 a95241bf-73f2-0310-859d-f6bbb57e9c96

adding POSIX-functions llround*(), which Maxime reported missing
* copied implementations for llround(), llroundf() and llroundl() from
glibc-2.3.2
* added corresponding declarations to math.h


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33863 a95241bf-73f2-0310-859d-f6bbb57e9c96

added nexttoward()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27349 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more posix functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27348 a95241bf-73f2-0310-859d-f6bbb57e9c96

added a few more math functions, rearranged some functions in math.h


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27339 a95241bf-73f2-0310-859d-f6bbb57e9c96

added matherr, lroundl and roundl


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27338 a95241bf-73f2-0310-859d-f6bbb57e9c96

added gammal_r and lgammal_r private functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27274 a95241bf-73f2-0310-859d-f6bbb57e9c96

added fpclassifyl


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27272 a95241bf-73f2-0310-859d-f6bbb57e9c96

added s_signbitf.c for x86


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27259 a95241bf-73f2-0310-859d-f6bbb57e9c96

added memrchr and dirname


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24985 a95241bf-73f2-0310-859d-f6bbb57e9c96

I needed nextafterf support in WebKit, so I added it here. It was already
defined in the headers. If this is not the correct way to do this, let me
know, but it seems to work (well it compiled at least.)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22890 a95241bf-73f2-0310-859d-f6bbb57e9c96

added trunc, truncf (and truncl on x86) from glibc
should help on bug #1260


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21350 a95241bf-73f2-0310-859d-f6bbb57e9c96

Imported lround() and lroundf() from glibc.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17399 a95241bf-73f2-0310-859d-f6bbb57e9c96

updated gamma and gammaf
copied y0 y1 yn BeOS behaviour (even if the spec accepts both)
added ilogb ilogbf significand significandf (x86 and generic)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17248 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added fegetround() and fesetround(), disabled special SSE support for the latter, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16835 a95241bf-73f2-0310-859d-f6bbb57e9c96

replaced strlen with glibc optimized version i586 and powerpc32
if build fails, simply delete the object file posix_build.o manually


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16819 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more multibyte glibc functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16728 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added missing [l]lrint[f|l]() functions.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16570 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more math functions (complex ones)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16394 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more math functions (complex ones)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16392 a95241bf-73f2-0310-859d-f6bbb57e9c96

added missing wrappers from glibc 2.3.6
hopefully fix bug #157


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16391 a95241bf-73f2-0310-859d-f6bbb57e9c96

fix bug #151


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16371 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added missing wrappers for hypot() and hypotf(), fixing bug #75.
I wouldn't be surprised, if more wrappers are still missing.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15709 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed libroot/posix/math completely and added the respective
functions from glibc 2.3.2. Adding those one by one is extremely
boring and time-consuming work. We should probably just remove the
math stuff again, add a verbatim copy of the glibc directories, and
shuffle things around afterwards.
* Note that for x86 holds sizeof(long double) == 96. I removed the
generic 128 bit long double functions that were in use before and
added respective 96 bit versions to arch/x86 (or left them out, if
they weren't used). For PPC the System V ABI spec supplement specifies
sizeof(long double) == 128, but I had trouble configuring gcc to
actually use that setting (looks like there simply is no support for
TI mode for PPC 32). So we have to live with sizeof(long double) ==
sizeof(double) == 64 for the time being.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15477 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved architecture independent sources into new subdirectory "generic".


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15405 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added PPC specific and some generic glibc headers. Taken from
glibc 2.3.2, which seems to be the version used in other places,
though I also found older files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15402 a95241bf-73f2-0310-859d-f6bbb57e9c96

* libroot and the runtime loader are no longer built with kernel rules.
* New rule Ld, analogously to KernelLd.
* Added StaticLibrary parameter for supplying additional objects.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15191 a95241bf-73f2-0310-859d-f6bbb57e9c96

added some more glibc functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15064 a95241bf-73f2-0310-859d-f6bbb57e9c96

added some x86 glibc functions (more to come)
we might miss some wrappers for some ieee754 functions (to check)
hope nothing is broken


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14968 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged changes from branch build_system_redesign at revision 14573.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14574 a95241bf-73f2-0310-859d-f6bbb57e9c96

inline functions aren't inlined when we have -g / -O0
we filter them for this directory
hopefully this fixes Darkwyrm's build problem


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13152 a95241bf-73f2-0310-859d-f6bbb57e9c96

This should fix the build after all the kernel/system renaming.
If anything is still broken (and was not before :)), please shout.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12361 a95241bf-73f2-0310-859d-f6bbb57e9c96

Renamed src/kernel to src/system.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12359 a95241bf-73f2-0310-859d-f6bbb57e9c96

libroot: added a complex.h header based on ...

http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/complex.h.html
* added missing parts from glibc.
* x86_64 was already complete, x86 was missing a few functions.
* should help with #12202, provided that the gcc4 buildtools are rebuilt.

Add s_tanhl.c to x86 jamfile

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>

Add s_ldexpl.c to x86 jamfile

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>

Add glibc ilogbl implemenation

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>

More work towards hybrid support

* All packaging architecture dependent variables do now have a
respective suffix and are set up for each configured packaging
architecture, save for the kernel and boot loader variables, which
are still only set up for the primary architecture.
For convenience TARGET_PACKAGING_ARCH, TARGET_ARCH, TARGET_LIBSUPC++,
and TARGET_LIBSTDC++ are set to the respective values for the primary
packaging architecture by default.
* Introduce a set of MultiArch* rules to help with building targets for
multiple packaging architectures. Generally the respective targets are
(additionally) gristed with the packaging architecture. For libraries
the additional grist is usually omitted for the primary architecture
(e.g. libroot.so and <x86>libroot.so for x86_gcc2/x86 hybrid), so that
Jamfiles for targets built only for the primary architecture don't
need to be changed.
* Add multi-arch build support for all targets needed for the stage 1
cross devel package as well as for libbe (untested).

Stop using glibc's asm strlen and use our own.

Mostly done because olta want less dependency on glibc.
It should also make porting a tiny bit simpler.

Testresults, mean values on Haiku from libMicro:
* with glibc: strlen_10: 0.03859S, strlen_1k: 1.67075S.
* with strlen.cpp: strlen_10: 0.03854S, strlen_1k: 1.66938S.

So at least on my machine it's possible to beat glibc ;)

Fixed math.h part of #2696

* added lgammal_r wrapper
* removed gamma_r and gammaf_r functions from math.h

Introduce __set_errno() throughout libroot.

* add errno_private.h, which defines the __set_errno() macro with
and without tracing
* instead of setting errno manually, all libroot's code now invokes
__set_errno(), which makes it much easier to trace changes to errno
* redirect glibc's use of __set_errno() to our own version

Applied a patch by MrSunshine that adds modfl() - thanks!

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37904 a95241bf-73f2-0310-859d-f6bbb57e9c96

added fmin, fma, fmax from glibc (ticket #5114).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34652 a95241bf-73f2-0310-859d-f6bbb57e9c96

added missing posix functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33867 a95241bf-73f2-0310-859d-f6bbb57e9c96

adding POSIX-functions llround*(), which Maxime reported missing
* copied implementations for llround(), llroundf() and llroundl() from
glibc-2.3.2
* added corresponding declarations to math.h


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33863 a95241bf-73f2-0310-859d-f6bbb57e9c96

added nexttoward()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27349 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more posix functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27348 a95241bf-73f2-0310-859d-f6bbb57e9c96

added a few more math functions, rearranged some functions in math.h


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27339 a95241bf-73f2-0310-859d-f6bbb57e9c96

added matherr, lroundl and roundl


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27338 a95241bf-73f2-0310-859d-f6bbb57e9c96

added gammal_r and lgammal_r private functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27274 a95241bf-73f2-0310-859d-f6bbb57e9c96

added fpclassifyl


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27272 a95241bf-73f2-0310-859d-f6bbb57e9c96

added s_signbitf.c for x86


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27259 a95241bf-73f2-0310-859d-f6bbb57e9c96

added memrchr and dirname


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24985 a95241bf-73f2-0310-859d-f6bbb57e9c96

I needed nextafterf support in WebKit, so I added it here. It was already
defined in the headers. If this is not the correct way to do this, let me
know, but it seems to work (well it compiled at least.)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22890 a95241bf-73f2-0310-859d-f6bbb57e9c96

added trunc, truncf (and truncl on x86) from glibc
should help on bug #1260


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21350 a95241bf-73f2-0310-859d-f6bbb57e9c96

Imported lround() and lroundf() from glibc.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17399 a95241bf-73f2-0310-859d-f6bbb57e9c96

updated gamma and gammaf
copied y0 y1 yn BeOS behaviour (even if the spec accepts both)
added ilogb ilogbf significand significandf (x86 and generic)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17248 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added fegetround() and fesetround(), disabled special SSE support for the latter, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16835 a95241bf-73f2-0310-859d-f6bbb57e9c96

replaced strlen with glibc optimized version i586 and powerpc32
if build fails, simply delete the object file posix_build.o manually


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16819 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more multibyte glibc functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16728 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added missing [l]lrint[f|l]() functions.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16570 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more math functions (complex ones)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16394 a95241bf-73f2-0310-859d-f6bbb57e9c96

added more math functions (complex ones)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16392 a95241bf-73f2-0310-859d-f6bbb57e9c96

added missing wrappers from glibc 2.3.6
hopefully fix bug #157


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16391 a95241bf-73f2-0310-859d-f6bbb57e9c96

fix bug #151


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16371 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added missing wrappers for hypot() and hypotf(), fixing bug #75.
I wouldn't be surprised, if more wrappers are still missing.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15709 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed libroot/posix/math completely and added the respective
functions from glibc 2.3.2. Adding those one by one is extremely
boring and time-consuming work. We should probably just remove the
math stuff again, add a verbatim copy of the glibc directories, and
shuffle things around afterwards.
* Note that for x86 holds sizeof(long double) == 96. I removed the
generic 128 bit long double functions that were in use before and
added respective 96 bit versions to arch/x86 (or left them out, if
they weren't used). For PPC the System V ABI spec supplement specifies
sizeof(long double) == 128, but I had trouble configuring gcc to
actually use that setting (looks like there simply is no support for
TI mode for PPC 32). So we have to live with sizeof(long double) ==
sizeof(double) == 64 for the time being.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15477 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved architecture independent sources into new subdirectory "generic".


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15405 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added PPC specific and some generic glibc headers. Taken from
glibc 2.3.2, which seems to be the version used in other places,
though I also found older files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15402 a95241bf-73f2-0310-859d-f6bbb57e9c96

* libroot and the runtime loader are no longer built with kernel rules.
* New rule Ld, analogously to KernelLd.
* Added StaticLibrary parameter for supplying additional objects.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15191 a95241bf-73f2-0310-859d-f6bbb57e9c96

added some more glibc functions


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15064 a95241bf-73f2-0310-859d-f6bbb57e9c96

added some x86 glibc functions (more to come)
we might miss some wrappers for some ieee754 functions (to check)
hope nothing is broken


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14968 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged changes from branch build_system_redesign at revision 14573.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14574 a95241bf-73f2-0310-859d-f6bbb57e9c96

inline functions aren't inlined when we have -g / -O0
we filter them for this directory
hopefully this fixes Darkwyrm's build problem


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13152 a95241bf-73f2-0310-859d-f6bbb57e9c96

This should fix the build after all the kernel/system renaming.
If anything is still broken (and was not before :)), please shout.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12361 a95241bf-73f2-0310-859d-f6bbb57e9c96

Renamed src/kernel to src/system.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12359 a95241bf-73f2-0310-859d-f6bbb57e9c96