"""This module implements additional tests ala autoconf which can be useful.
"""
import textwrap
# We put them here since they could be easily reused outside numpy.distutils
def check_inline(cmd):
"""Return the inline identifier (may be empty)."""
cmd._check_compiler()
body = textwrap.dedent("""
#ifndef __cplusplus
static %(inline)s int static_func (void)
{
return 0;
}
%(inline)s int nostatic_func (void)
{
return 0;
}
#endif""")
for kw in ['inline', '__inline__', '__inline']:
st = cmd.try_compile(body % {'inline': kw}, None, None)
if st:
return kw
return ''
def check_restrict(cmd):
"""Return the restrict identifier (may be empty)."""
cmd._check_compiler()
body = textwrap.dedent("""
static int static_func (char * %(restrict)s a)
{
return 0;
}
""")
for kw in ['restrict', '__restrict__', '__restrict']:
st = cmd.try_compile(body % {'restrict': kw}, None, None)
if st:
return kw
return ''
def check_compiler_gcc(cmd):
"""Check if the compiler is GCC."""
cmd._check_compiler()
body = textwrap.dedent("""
int
main()
{
#if (! defined __GNUC__)
#error gcc required
#endif
return 0;
}
""")
return cmd.try_compile(body, None, None)
def check_gcc_version_at_least(cmd, major, minor=0, patchlevel=0):
"""
Check that the gcc version is at least the specified version."""
cmd._check_compiler()
version = '.'.join([str(major), str(minor), str(patchlevel)])
body = textwrap.dedent("""
int
main()
{
#if (! defined __GNUC__) || (__GNUC__ < %(major)d) || \\
(__GNUC_MINOR__ < %(minor)d) || \\
(__GNUC_PATCHLEVEL__ < %(patchlevel)d)
#error gcc >= %(version)s required
#endif
return 0;
}
""")
kw = {'version': version, 'major': major, 'minor': minor,
'patchlevel': patchlevel}
return cmd.try_compile(body % kw, None, None)
def check_gcc_function_attribute(cmd, attribute, name):
"""Return True if the given function attribute is supported."""
cmd._check_compiler()
body = textwrap.dedent("""
#pragma GCC diagnostic error "-Wattributes"
#pragma clang diagnostic error "-Wattributes"
int %s %s(void* unused)
{
return 0;
}
int
main()
{
return 0;
}
""") % (attribute, name)
return cmd.try_compile(body, None, None) != 0
def check_gcc_function_attribute_with_intrinsics(cmd, attribute, name, code,
include):
"""Return True if the given function attribute is supported with
intrinsics."""
cmd._check_compiler()
body = textwrap.dedent("""
#include<%s>
int %s %s(void)
{
%s;
return 0;
}
int
main()
{
return 0;
}
""") % (include, attribute, name, code)
return cmd.try_compile(body, None, None) != 0
def check_gcc_variable_attribute(cmd, attribute):
"""Return True if the given variable attribute is supported."""
cmd._check_compiler()
body = textwrap.dedent("""
#pragma GCC diagnostic error "-Wattributes"
#pragma clang diagnostic error "-Wattributes"
int %s foo;
int
main()
{
return 0;
}
""") % (attribute, )
return cmd.try_compile(body, None, None) != 0
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