From 9d50da70608de32d9db0c29859caec6f2cddb95f Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Wed, 5 Oct 2016 18:34:39 +0200
Subject: gnu: wordnet: Make sure the self-reference is visible to the GC.
Before that, "guix gc --references $(guix build wordnet)" would not show
WordNet itself, erroneously so.
* gnu/packages/wordnet.scm (wordnet)[arguments]: Add -fno-builtin-strcpy
to #:configure-flags.
---
gnu/packages/wordnet.scm | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
(limited to 'gnu')
diff --git a/gnu/packages/wordnet.scm b/gnu/packages/wordnet.scm
index dd3cdf3008..357c19351b 100644
--- a/gnu/packages/wordnet.scm
+++ b/gnu/packages/wordnet.scm
@@ -51,7 +51,22 @@
;; Provide the `result' field in `Tcl_Interp'.
;; See <https://bugs.gentoo.org/show_bug.cgi?id=452034>.
- "CFLAGS=-DUSE_INTERP_RESULT -O2")
+ ;;
+ ;; The 'DEFAULTPATH' string literal, which
+ ;; contains the output path, only appears as
+ ;; the operand of one 'strcpy' call. As a
+ ;; consequence, GCC does not store the string
+ ;; literal as is but instead introduces "gaps"
+ ;; for alignment reasons presumably---like
+ ;; "/gnu/sto?????re/8jp8b??????ky105…". This
+ ;; makes this string invisible to the GC, which
+ ;; in turns causes problems when running a
+ ;; grafted WordNet because that grafted WordNet
+ ;; keeps referring to the ungrafted variant,
+ ;; which is not protected from GC. Thus,
+ ;; disable use of '__builtin_strcpy' to avoid
+ ;; that.
+ "CFLAGS=-DUSE_INTERP_RESULT -O2 -fno-builtin-strcpy")
#:phases
(modify-phases %standard-phases
(add-after 'install 'post-install
--
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