Also add missing declarations to misc. functions.
Fix clearerr() implementation (previous was broken).
Handle feature test macros like _POSIX_C_SOURCE properly.
Change-Id: Icdc973a6b9d550a166fc2545f727ea837fe800c4
bionic/libc/include/../include/stdlib.h: In function 'int grantpt(int)':
bionic/libc/include/../include/stdlib.h:138:23: warning: parameter '__fd' set but not used [-Wunused-but-set-parameter]
By adding __attribute((unused)) to __fd, the warning is gone, and this
attribute is compatible with gcc-4.4.0, gcc-4.3.1 gcc-4.2.1.
There is no any side effect.
Change-Id: I385f0f4da1013ffd1499e391eac9123aafe1f7a5
The gHardy man pages specify the return type of ptsname_r to be char*, but the
return value to be 0 on success, negative on error and the gHardy stdlib.h
defines extern int ptsname_r(...).
Busybox telnetd fails to run successfully without this change.
This reverts commit 754c178ae5.
Turns out we don't need it afterall (needed a stable sort anyways).
So, we'll make that change in the dev branch instead.
NOTE: This replaces qsort.c with the FreeBSD version. While
the patch changes the source, it should not alter the
implementation that should use the exact same algorithm.
