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Fix doc snarfing with GCC 4.5+.
From <http://git.savannah.gnu.org/cgit/guile.git/commit/?h=branch_release-1-8&id=aac41d28358cea594bb30f6e547afb82bb6004a6>.
diff --git a/scripts/snarf-check-and-output-texi b/scripts/snarf-check-and-output-texi
index ea33e17..8cd42e8 100755
--- a/scripts/snarf-check-and-output-texi
+++ b/scripts/snarf-check-and-output-texi
@@ -267,6 +267,17 @@ exec ${GUILE-guile} -l $0 -c "(apply $main (cdr (command-line)))" "$@"
(set! *file* file)
(set! *line* line))
+ ;; newer gccs like to throw around more location markers into the
+ ;; preprocessed source; these (hash . hash) bits are what they translate to
+ ;; in snarfy terms.
+ (('location ('string . file) ('int . line) ('hash . 'hash))
+ (set! *file* file)
+ (set! *line* line))
+
+ (('location ('hash . 'hash) ('string . file) ('int . line) ('hash . 'hash))
+ (set! *file* file)
+ (set! *line* line))
+
(('arglist rest ...)
(set! *args* (do-arglist rest)))
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