| project('has function', 'c', 'cpp') |
| |
| compilers = [meson.get_compiler('c'), meson.get_compiler('cpp')] |
| |
| foreach cc : compilers |
| if not cc.has_function('printf', prefix : '#include<stdio.h>') |
| error('"printf" function not found (should always exist).') |
| endif |
| |
| # Should also be able to detect it without specifying the header |
| # We check for a different function here to make sure the result is |
| # not taken from a cache (ie. the check above) |
| # On MSVC fprintf is defined as an inline function in the header, so it cannot |
| # be found without the include. |
| if cc.get_id() != 'msvc' |
| assert(cc.has_function('fprintf'), '"fprintf" function not found without include (on !msvc).') |
| else |
| assert(cc.has_function('fprintf', prefix : '#include <stdio.h>'), '"fprintf" function not found with include (on msvc).') |
| endif |
| |
| if cc.has_function('hfkerhisadf', prefix : '#include<stdio.h>') |
| error('Found non-existent function "hfkerhisadf".') |
| endif |
| |
| # With glibc on Linux lchmod is a stub that will always return an error, |
| # we want to detect that and declare that the function is not available. |
| # We can't check for the C library used here of course, but if it's not |
| # implemented in glibc it's probably not implemented in any other 'slimmer' |
| # C library variants either, so the check should be safe either way hopefully. |
| if host_machine.system() == 'linux' and cc.get_id() == 'gcc' |
| assert (cc.has_function('poll', prefix : '#include <poll.h>'), 'couldn\'t detect "poll" when defined by a header') |
| assert (not cc.has_function('lchmod', prefix : '''#include <sys/stat.h> |
| #include <unistd.h>'''), '"lchmod" check should have failed') |
| endif |
| |
| # For some functions one needs to define _GNU_SOURCE before including the |
| # right headers to get them picked up. Make sure we can detect these functions |
| # as well without any prefix |
| if cc.has_header_symbol('sys/socket.h', 'recvmmsg', prefix : '#define _GNU_SOURCE') |
| # We assume that if recvmmsg exists sendmmsg does too |
| assert (cc.has_function('sendmmsg'), 'Failed to detect function "sendmmsg" (should always exist).') |
| endif |
| endforeach |
