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"""This module implements additional tests ala autoconf which can be useful.
"""
from __future__ import division, absolute_import, print_function
# 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 = """
#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 = """
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_gcc4(cmd):
"""Return True if the C compiler is GCC 4.x."""
cmd._check_compiler()
body = """
int
main()
{
#if (! defined __GNUC__) || (__GNUC__ < 4)
#error gcc >= 4 required
#endif
return 0;
}
"""
return cmd.try_compile(body, None, None)
def check_gcc_function_attribute(cmd, attribute, name):
"""Return True if the given function attribute is supported."""
cmd._check_compiler()
body = """
#pragma GCC diagnostic error "-Wattributes"
#pragma clang diagnostic error "-Wattributes"
int %s %s(void*);
int
main()
{
return 0;
}
""" % (attribute, name)
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 = """
#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