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107 lines
4.8 KiB
107 lines
4.8 KiB
project('has function', 'c', 'cpp') |
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host_system = host_machine.system() |
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# This is used in the `test_compiler_check_flags_order` unit test |
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unit_test_args = '-I/tmp' |
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defines_has_builtin = '''#ifndef __has_builtin |
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#error "no __has_builtin" |
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#endif |
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''' |
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compilers = [meson.get_compiler('c'), meson.get_compiler('cpp')] |
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foreach cc : compilers |
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if not cc.has_function('printf', prefix : '#include<stdio.h>', |
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args : unit_test_args) |
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error('"printf" function not found (should always exist).') |
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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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# On MSVC fprintf is defined as an inline function in the header, so it cannot |
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# be found without the include. |
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if not ['msvc', 'intel-cl'].contains(cc.get_id()) |
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assert(cc.has_function('fprintf', args : unit_test_args), |
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'"fprintf" function not found without include (on !msvc).') |
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else |
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assert(cc.has_function('fprintf', prefix : '#include <stdio.h>', |
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args : unit_test_args), |
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'"fprintf" function not found with include (on msvc).') |
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# Compiler intrinsics |
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assert(cc.has_function('strcmp'), |
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'strcmp intrinsic should have been found on MSVC') |
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assert(cc.has_function('strcmp', prefix : '#include <string.h>'), |
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'strcmp intrinsic should have been found with #include on MSVC') |
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endif |
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if cc.has_function('hfkerhisadf', prefix : '#include<stdio.h>', |
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args : unit_test_args) |
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error('Found non-existent function "hfkerhisadf".') |
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endif |
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if cc.has_function('hfkerhisadf', args : unit_test_args) |
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error('Found non-existent function "hfkerhisadf".') |
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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_system == 'linux' or host_system == 'darwin' |
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assert (cc.has_function('poll', prefix : '#include <poll.h>', |
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args : unit_test_args), |
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'couldn\'t detect "poll" when defined by a header') |
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lchmod_prefix = '#include <sys/stat.h>\n#include <unistd.h>' |
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has_lchmod = cc.has_function('lchmod', prefix : lchmod_prefix, args : unit_test_args) |
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if host_system == 'linux' |
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glibc_major = cc.get_define('__GLIBC__', prefix: '#include <gnu/libc-version.h>', args: unit_test_args) |
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glibc_minor = cc.get_define('__GLIBC_MINOR__', prefix: '#include <gnu/libc-version.h>', args: unit_test_args) |
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glibc_vers = '@0@.@1@'.format(glibc_major, glibc_minor) |
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message('GLIBC vetsion:', glibc_vers) |
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# lchmod was implemented in glibc 2.32 (https://sourceware.org/pipermail/libc-announce/2020/000029.html) |
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if glibc_vers.version_compare('<2.32') |
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assert (not has_lchmod, '"lchmod" check should have failed') |
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else |
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assert (has_lchmod, '"lchmod" check should have succeeded') |
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endif |
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else |
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# macOS and *BSD have lchmod |
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assert (has_lchmod, '"lchmod" check should have succeeded') |
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endif |
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# Check that built-ins are found properly both with and without headers |
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assert(cc.has_function('alloca', args : unit_test_args), |
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'built-in alloca must be found on ' + host_system) |
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assert(cc.has_function('alloca', prefix : '#include <alloca.h>', |
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args : unit_test_args), |
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'built-in alloca must be found with #include') |
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if not cc.compiles(defines_has_builtin, args : unit_test_args) |
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assert(not cc.has_function('alloca', |
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prefix : '#include <alloca.h>\n#undef alloca', |
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args : unit_test_args), |
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'built-in alloca must not be found with #include and #undef') |
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endif |
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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', |
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prefix : '#define _GNU_SOURCE', |
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args : unit_test_args) |
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# We assume that if recvmmsg exists sendmmsg does too |
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assert (cc.has_function('sendmmsg', args : unit_test_args), |
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'Failed to detect function "sendmmsg" (should always exist).') |
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endif |
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# We should be able to find GCC and Clang __builtin functions |
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if ['gcc', 'clang'].contains(cc.get_id()) |
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# __builtin_constant_p is documented to exist at least as far back as |
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# GCC 2.95.3 |
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assert(cc.has_function('__builtin_constant_p', args : unit_test_args), |
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'__builtin_constant_p must be found under gcc and clang') |
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endif |
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endforeach
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