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Diffstat (limited to '')
| -rw-r--r-- | test cases/common/36 has function/meson.build | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/test cases/common/36 has function/meson.build b/test cases/common/36 has function/meson.build new file mode 100644 index 0000000..a3f0a3c --- /dev/null +++ b/test cases/common/36 has function/meson.build @@ -0,0 +1,116 @@ +project('has function', 'c', 'cpp') + +host_system = host_machine.system() + +# This is used in the `test_compiler_check_flags_order` unit test +unit_test_args = '-I/tmp' +defines_has_builtin = '''#ifndef __has_builtin +#error "no __has_builtin" +#endif +''' +compilers = [meson.get_compiler('c'), meson.get_compiler('cpp')] + +foreach cc : compilers + if not cc.has_function('printf', prefix : '#include<stdio.h>', + args : unit_test_args) + 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 not ['msvc', 'intel-cl'].contains(cc.get_id()) + assert(cc.has_function('fprintf', args : unit_test_args), + '"fprintf" function not found without include (on !msvc).') + else + assert(cc.has_function('fprintf', prefix : '#include <stdio.h>', + args : unit_test_args), + '"fprintf" function not found with include (on msvc).') + # Compiler intrinsics + assert(cc.has_function('strcmp'), + 'strcmp intrinsic should have been found on MSVC') + assert(cc.has_function('strcmp', prefix : '#include <string.h>'), + 'strcmp intrinsic should have been found with #include on MSVC') + endif + + if cc.has_function('hfkerhisadf', prefix : '#include<stdio.h>', + args : unit_test_args) + error('Found non-existent function "hfkerhisadf".') + endif + + if cc.has_function('hfkerhisadf', args : unit_test_args) + error('Found non-existent function "hfkerhisadf".') + endif + + # With glibc (before 2.32, see below) 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 the main + # alternative Linux C library (musl) doesn't use glibc's stub mechanism; + # also, it has implemented lchmod since 2013, so it should be safe to check + # that lchmod is available on Linux when not using glibc. + if host_system == 'linux' or host_system == 'darwin' + assert (cc.has_function('poll', prefix : '#include <poll.h>', + args : unit_test_args), + 'couldn\'t detect "poll" when defined by a header') + lchmod_prefix = '#include <sys/stat.h>\n#include <unistd.h>' + has_lchmod = cc.has_function('lchmod', prefix : lchmod_prefix, args : unit_test_args) + + if host_system == 'linux' + # __GLIBC__ macro can be retrieved by including almost any C library header + glibc_major = cc.get_define('__GLIBC__', prefix: '#include <unistd.h>', args: unit_test_args) + # __GLIBC__ will only be set for glibc + if glibc_major != '' + glibc_minor = cc.get_define('__GLIBC_MINOR__', prefix: '#include <unistd.h>', args: unit_test_args) + glibc_vers = '@0@.@1@'.format(glibc_major, glibc_minor) + message('GLIBC version:', glibc_vers) + + # lchmod was implemented in glibc 2.32 (https://sourceware.org/pipermail/libc-announce/2020/000029.html) + if glibc_vers.version_compare('<2.32') + assert (not has_lchmod, '"lchmod" check should have failed') + else + assert (has_lchmod, '"lchmod" check should have succeeded') + endif + else + # Other C libraries for Linux should have lchmod + assert (has_lchmod, '"lchmod" check should have succeeded') + endif + else + # macOS and *BSD have lchmod + assert (has_lchmod, '"lchmod" check should have succeeded') + endif + # Check that built-ins are found properly both with and without headers + assert(cc.has_function('alloca', args : unit_test_args), + 'built-in alloca must be found on ' + host_system) + assert(cc.has_function('alloca', prefix : '#include <alloca.h>', + args : unit_test_args), + 'built-in alloca must be found with #include') + if not cc.compiles(defines_has_builtin, args : unit_test_args) + assert(not cc.has_function('alloca', + prefix : '#include <alloca.h>\n#undef alloca', + args : unit_test_args), + 'built-in alloca must not be found with #include and #undef') + endif + 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', + args : unit_test_args) + # We assume that if recvmmsg exists sendmmsg does too + assert (cc.has_function('sendmmsg', args : unit_test_args), + 'Failed to detect function "sendmmsg" (should always exist).') + endif + + # We should be able to find GCC and Clang __builtin functions + if ['gcc', 'clang'].contains(cc.get_id()) + # __builtin_constant_p is documented to exist at least as far back as + # GCC 2.95.3 + assert(cc.has_function('__builtin_constant_p', args : unit_test_args), + '__builtin_constant_p must be found under gcc and clang') + endif +endforeach |