Only increment once per fgets.

Make mathtest fail on error so make check fails too.

Without printing anything on success it is unclear if the right set
of functions got hooked up in the test code.

Arm state code can be called from thumb code, so don't hide the symbol.

To allow libmathlib.a to be a drop-in replacement for libc functions
on 32bit arm, we should provide long double symbols otherwise the
libc long double implementation may pull in double symbols that can
conflict with libmathlib.a in case of static linking.

Using wrappers instead of alias to avoid type declaration conflicts.

The only difference is changing the symbol name from strrchr
to __strrchr_aarch64_sve.

The only difference is changing the symbol name from strnlen
to __strnlen_aarch64_sve.

The only difference is changing the symbol name from strncmp
to __strncmp_aarch64_sve.

The only difference is changing the symbol name from strlen
to __strlen_aarch64_sve.

The only difference is changing the symbol name from strcpy
to __strcpy_aarch64_sve.

The only difference is changing the symbol name from strcmp
to __strcmp_aarch64_sve.

The only difference is changing the symbol name from strchr/strchrnul
to __strchr_aarch64_sve and __strchrnul_aarch64_sve.

The only difference is changing the symbol name from memcmp
to __memcmp_aarch64_sve.

The only difference is changing the symbol name from memchr
to __memchr_aarch64_sve.

Removed tanf declaration since the implementation got removed too.

Changed the remaining string functions that Arm published under BSD
license to the MIT license.

Zatrazz/cortex strings import

The only difference is changing the symbol name from strlen
to __strlen_armv6t2.

The only difference is changing the symbol name from strcmp
to __strcmp_armv6m.

The only difference is changing the symbol name from strcmp
to __strcmp_arm.

The differences from cortex-strings are:

  - Simplify the thumb-2/thumb selection by removing the usage of
    PREFER_SIZE_OVER_SPEED and __OPTIMIZE_SIZE__.

  - Removed the dumb byte-per-byte loops.

The only difference is changing the symbol name from memchr
to __memchr_arm and the final .size directive.

The only difference is changing the symbol name from memset
to __memset_arm and the final .size directive.

The only difference is changing the symbol name from memcpy
to __memcpy_arm.