This change fixes compiler errors in Android as following.
../../../iodev/sound/soundoss.cc:43:10: fatal error: 'sys/soundcard.h'
file not found
43 | #include <sys/soundcard.h>
| ^~~~~~~~~~~~~~~~~
../../../iodev/network/slirp/misc.cc:195:12: error: use of undeclared
identifier 'getdtablesize'; did you mean 'getpagesize'?
195 | for (s = getdtablesize() - 1; s >= 3; s--)
| ^~~~~~~~~~~~~
| getpagesize
/data/data/com.termux/files/usr/include/unistd.h:356:5: note:
'getpagesize' declared here
356 | int getpagesize(void) __INTRODUCED_IN(21);
| ^
The official documentation also suggests to use __ANDROID__ macro which
is defined by the compiler irrespective of included headers and build
system.
https://android.googlesource.com/platform/bionic/+/HEAD/docs/defines.md
e1d67d9ce0