Add GNU Guile as an optional embedded scripting language for make.

On configure-enabled systems, configure will detect Guile installed
(using pkg-config, which is how GNU Guile is distributed) and enable
it if so.

On all non-configure-enabled systems, currently, the default is for
Guile support to be disabled.

1 files changed, 18 insertions, 0 deletions

diff --git a/function.c b/function.c
index a8b9609e..2f1afe71 100644
--- a/function.c
+++ b/function.c
@@ -2103,6 +2103,21 @@ func_abspath (char *o, char **argv, const char *funcname UNUSED)
   return o;
 }
 
+#ifdef HAVE_GUILE
+static char *
+func_guile (char *o, char **argv, const char *funcname UNUSED)
+{
+  if (argv[0] && argv[0][0] != '\0')
+    {
+      char *str = guile_eval_string (argv[0]);
+      o = variable_buffer_output (o, str, strlen (str));
+      free (str);
+    }
+
+  return o;
+}
+#endif
+
 /* Lookup table for builtin functions.
 
    This doesn't have to be sorted; we use a straight lookup.  We might gain
@@ -2156,6 +2171,9 @@ static struct function_table_entry function_table_init[] =
   { STRING_SIZE_TUPLE("and"),           1,  0,  0,  func_and},
   { STRING_SIZE_TUPLE("value"),         0,  1,  1,  func_value},
   { STRING_SIZE_TUPLE("eval"),          0,  1,  1,  func_eval},
+#ifdef HAVE_GUILE
+  { STRING_SIZE_TUPLE("guile"),         0,  1,  1,  func_guile},
+#endif
 #ifdef EXPERIMENTAL
   { STRING_SIZE_TUPLE("eq"),            2,  2,  1,  func_eq},
   { STRING_SIZE_TUPLE("not"),           0,  1,  1,  func_not},