+ /* Store the definition of all the muscles. */
+ const char *tempdir = getenv ("TMPDIR");
+ char *tempfile = NULL;
+ FILE *out = NULL;
+ int fd;
+
+ if (tempdir == NULL)
+ tempdir = DEFAULT_TMPDIR;
+ tempfile = xmalloc (strlen (tempdir) + 11);
+ sprintf (tempfile, "%s/bsnXXXXXX", tempdir);
+ fd = mkstemp (tempfile);
+ if (fd == -1)
+ error (EXIT_FAILURE, errno, "%s", tempfile);
+
+ out = fdopen (fd, "w");
+ if (out == NULL)
+ error (EXIT_FAILURE, errno, "%s", tempfile);
+
+ /* There are no comments, especially not `#': we do want M4 expansion
+ after `#': think of CPP macros! */
+ fputs ("m4_changecom()\n", out);
+ fputs ("m4_init()\n", out);
+
+ fputs ("m4_define([b4_actions], \n[[", out);
+ actions_output (out);
+ fputs ("]])\n\n", out);
+
+ fputs ("m4_define([b4_guards], \n[[", out);
+ guards_output (out);
+ fputs ("]])\n\n", out);
+
+ fputs ("m4_define([b4_tokens], \n[", out);
+ token_definitions_output (out);
+ fputs ("])\n\n", out);
+
+ muscles_m4_output (out);
+
+ fputs ("m4_wrap([m4_divert_pop(0)])\n", out);
+ fputs ("m4_divert_push(0)dnl\n", out);
+ xfclose (out);
+
+ /* Invoke m4 on the definition of the muscles, and the skeleton. */
+ {
+ const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
+ const char *m4 = getenv ("M4");
+ if (!m4)
+ m4 = M4;
+ if (!bison_pkgdatadir)
+ bison_pkgdatadir = PKGDATADIR;
+ if (trace_flag)
+ fprintf (stderr,
+ "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n",
+ m4, bison_pkgdatadir, tempfile, skeleton);
+ skel_in = readpipe (m4,
+ "-I", bison_pkgdatadir,
+ "m4sugar/m4sugar.m4",
+ tempfile,
+ skeleton,
+ NULL);
+ if (!skel_in)
+ error (EXIT_FAILURE, errno, "cannot run m4");
+ skel_lex ();
+
+ /* If `debugging', keep this file alive. */
+ if (!trace_flag)
+ unlink (tempfile);
+ }
projects / bison.git / blobdiff