+
+/* Handle #pragma GCC pch_preprocess, to load in the PCH file. */
+
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif
+
+void
+c_common_pch_pragma (cpp_reader *pfile)
+{
+ tree name_t;
+ const char *name;
+ int fd;
+
+ if (c_lex (&name_t) != CPP_STRING)
+ {
+ error ("malformed #pragma GCC pch_preprocess, ignored");
+ return;
+ }
+
+ if (! cpp_get_options (pfile)->preprocessed)
+ {
+ error ("pch_preprocess pragma should only be used with -fpreprocessed");
+ inform ("use #include instead");
+ return;
+ }
+
+ name = TREE_STRING_POINTER (name_t);
+
+ fd = open (name, O_RDONLY | O_BINARY, 0666);
+ if (fd == -1)
+ fatal_error ("%s: couldn't open PCH file: %m\n", name);
+
+ if (c_common_valid_pch (pfile, name, fd) != 1)
+ {
+ if (!cpp_get_options (pfile)->warn_invalid_pch)
+ inform ("use -Winvalid-pch for more information");
+ fatal_error ("%s: PCH file was invalid", name);
+ }
+
+ c_common_read_pch (pfile, name, fd, name);
+
+ close (fd);
+}