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7670c84f77
Provides support for dynamically loadable objects in GNU make, as a "technology preview".
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/* GNU Guile interface for GNU Make.
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Copyright (C) 2011-2012 Free Software Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3 of the License, or (at your option) any later
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version.
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GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "make.h"
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#include "debug.h"
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#include "dep.h"
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#include "variable.h"
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#include <libguile.h>
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static SCM make_mod = SCM_EOL;
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static SCM obj_to_str = SCM_EOL;
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/* Convert an SCM object into a string. */
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static char *
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cvt_scm_to_str (SCM obj)
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{
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return scm_to_locale_string (scm_call_1 (obj_to_str, obj));
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}
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/* Perform the GNU make expansion function. */
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static SCM
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guile_expand_wrapper (SCM obj)
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{
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char *str = cvt_scm_to_str (obj);
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SCM ret;
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char *res;
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DB (DB_BASIC, (_("guile: Expanding '%s'\n"), str));
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res = allocated_variable_expand (str);
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ret = scm_from_locale_string (res);
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free (str);
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free (res);
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return ret;
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}
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/* Invoked by scm_c_define_module(), in the context of the GNU make module. */
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static void
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guile_define_module (void *data UNUSED)
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{
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/* Ingest the predefined Guile module for GNU make. */
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#include "gmk-default.h"
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/* Register a subr for GNU make's eval capability. */
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scm_c_define_gsubr ("gmk-expand", 1, 0, 0, guile_expand_wrapper);
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/* Define the rest of the module. */
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scm_c_eval_string (GUILE_module_defn);
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}
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/* Initialize the GNU make Guile module. */
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static void *
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guile_init (void *arg UNUSED)
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{
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/* Define the module. */
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make_mod = scm_c_define_module ("gnu make", guile_define_module, NULL);
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/* Get a reference to the object-to-string translator, for later. */
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obj_to_str = scm_variable_ref (scm_c_module_lookup (make_mod, "obj-to-str"));
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/* Import the GNU make module exports into the generic space. */
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scm_c_eval_string ("(use-modules (gnu make))");
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return NULL;
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}
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static void *
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internal_guile_eval (void *arg)
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{
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return cvt_scm_to_str (scm_c_eval_string (arg));
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}
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/* This is the function registered with make */
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static char *
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func_guile (char *o, char **argv, const char *funcname UNUSED)
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{
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if (argv[0] && argv[0][0] != '\0')
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{
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char *str = scm_with_guile (internal_guile_eval, argv[0]);
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if (str)
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{
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o = variable_buffer_output (o, str, strlen (str));
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free (str);
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}
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}
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return o;
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}
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/* ----- Public interface ----- */
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/* We could send the flocp to define_new_function(), but since guile is
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"kind of" built-in, that didn't seem so useful. */
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int
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guile_gmake_setup (const struct floc *flocp UNUSED)
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{
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/* Initialize the Guile interpreter. */
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scm_with_guile (guile_init, NULL);
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/* Create a make function "guile". */
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define_new_function (NILF, "guile", 0, 1, 1, func_guile);
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return 1;
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}
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