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+/* External interfaces usable by dynamic objects loaded into GNU Make.
+Copyright (C) 2013 Free Software Foundation, Inc.
+This file is part of GNU Make.
+GNU Make is free software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation; either version 3 of the License, or (at your option) any later
+GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+You should have received a copy of the GNU General Public License along with
+this program. If not, see <>. */
+#ifndef _GNUMAKE_H_
+#define _GNUMAKE_H_
+/* Specify the location of elements read from makefiles. */
+typedef struct
+ {
+ const char *filenm;
+ unsigned long lineno;
+ } gmk_floc;
+typedef char *(*gmk_func_ptr)(const char *nm, unsigned int argc, char **argv);
+#ifdef _WIN32
+# define GMK_EXPORT __declspec(dllexport)
+# else
+# define GMK_EXPORT __declspec(dllimport)
+# endif
+# define GMK_EXPORT
+/* Free memory returned by the gmk_expand() function. */
+GMK_EXPORT void gmk_free (char *str);
+/* Allocate memory in GNU make's context. */
+GMK_EXPORT char *gmk_alloc (unsigned int len);
+/* Run $(eval ...) on the provided string BUFFER. */
+GMK_EXPORT void gmk_eval (const char *buffer, const gmk_floc *floc);
+/* Run GNU make expansion on the provided string STR.
+ Returns an allocated buffer that the caller must free with gmk_free(). */
+GMK_EXPORT char *gmk_expand (const char *str);
+/* Register a new GNU make function NAME (maximum of 255 chars long).
+ When the function is expanded in the makefile, FUNC will be invoked with
+ the appropriate arguments.
+ The return value of FUNC must be either NULL, in which case it expands to
+ the empty string, or a pointer to the result of the expansion in a string
+ created by gmk_alloc(). GNU make will free the memory when it's done.
+ MIN_ARGS is the minimum number of arguments the function requires.
+ MAX_ARGS is the maximum number of arguments (or 0 if there's no maximum).
+ MIN_ARGS and MAX_ARGS may not exceed 255.
+ The FLAGS value may be GMK_FUNC_DEFAULT, or one or more of the following
+ flags OR'd together:
+ GMK_FUNC_NOEXPAND: the arguments to the function will be not be expanded
+ before FUNC is called.
+GMK_EXPORT void gmk_add_function (const char *name, gmk_func_ptr func,
+ unsigned int min_args, unsigned int max_args,
+ unsigned int flags);
+#define GMK_FUNC_DEFAULT 0x00
+#define GMK_FUNC_NOEXPAND 0x01
+#endif /* _GNUMAKE_H_ */