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49 lines
1.4 KiB
Meson
49 lines
1.4 KiB
Meson
conf_data = configuration_data()
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compiler = meson.get_compiler('c')
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older_oses = get_option('support-older-oses')
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if not older_oses
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code = '''#include <stddef.h>
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#include <inttypes.h> /* OSX sys/random.h needs Availability.h from this */
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#include <sys/random.h>
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int main() { return getentropy((void*)0, 0); }
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'''
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sysrandom = compiler.links(code, name : 'getentropy in sys/random.h')
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conf_data.set('ENT_GE_SYSRANDOM', sysrandom)
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if not sysrandom
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code = '''#include <unistd.h>
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int main() { return getentropy((void*)0, 0); }
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'''
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unistd = compiler.links(code, name : 'getentropy is in unistd.h')
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conf_data.set('ENT_GE_UNISTD', unistd)
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endif
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have_getentropy = sysrandom or unistd
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conf_data.set('ENT_GETENTROPY', have_getentropy)
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else
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have_getentropy = false
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endif
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if not have_getentropy
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code = '''#define _GNU_SOURCE
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#include <asm/unistd.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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int main() { return !syscall(__NR_getrandom, (void*)0, 0, 0); }
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'''
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getrandom = compiler.links(code, name : 'getrandom syscall available')
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conf_data.set('ENT_GETRANDOM', getrandom)
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if not getrandom
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code = '''#include <fcntl.h>
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int main() { return open("/dev/urandom", O_RDONLY) >= 0 ? 0 : 1; }
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'''
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urandom = compiler.run(code, name : 'can open /dev/urandom').returncode() == 0
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conf_data.set('ENT_URANDOM', urandom)
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endif
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endif
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configure_file(output : 'config.h',
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configuration : conf_data)
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