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