Method check_funcs_once

numpy/distutils/command/config.py:349–408

Check a list of functions at once. This is useful to speed up things, since all the functions in the funcs list will be put in one compilation unit. Arguments --------- funcs : seq list of functions to test include_dirs : seq

(self, funcs,
                   headers=None, include_dirs=None,
                   libraries=None, library_dirs=None,
                   decl=False, call=False, call_args=None)

                             libraries, library_dirs)

    def check_funcs_once(self, funcs,
                   headers=None, include_dirs=None,
                   libraries=None, library_dirs=None,
                   decl=False, call=False, call_args=None):
        """Check a list of functions at once.

        This is useful to speed up things, since all the functions in the funcs
        list will be put in one compilation unit.

        Arguments
        ---------
        funcs : seq
            list of functions to test
        include_dirs : seq
            list of header paths
        libraries : seq
            list of libraries to link the code snippet to
        library_dirs : seq
            list of library paths
        decl : dict
            for every (key, value), the declaration in the value will be
            used for function in key. If a function is not in the
            dictionary, no declaration will be used.
        call : dict
            for every item (f, value), if the value is True, a call will be
            done to the function f.
        """
        self._check_compiler()
        body = []
        if decl:
            for f, v in decl.items():
                if v:
                    body.append("int %s (void);" % f)

        # Handle MS intrinsics. See check_func for more info.
        body.append("#ifdef _MSC_VER")
        for func in funcs:
            body.append("#pragma function(%s)" % func)
        body.append("#endif")

        body.append("int main (void) {")
        if call:
            for f in funcs:
                if f in call and call[f]:
                    if not (call_args and f in call_args and call_args[f]):
                        args = ''
                    else:
                        args = call_args[f]
                    body.append("  %s(%s);" % (f, args))
                else:
                    body.append("  %s;" % f)
        else:
            for f in funcs:
                body.append("  %s;" % f)
        body.append("  return 0;")
        body.append("}")
        body = '\n'.join(body) + "\n"