[libvirt] [PATCH 1/2] cfg.mk: override gnulib's undesirable_word_seq check

[Ján Tomko]

The regex in gnulib checks if @xref is at the beginning
of a sentence, amongst other things.

Since we do not use Texinfo and the regex takes almost twice
as much as the rest of our checks, use a custom regex without
the @xref chcecks.
---
I do not know whether the gnulib regex can be optimized:

bad_xref_re_ ?= (?:[\w,:;] +|(?:see|also)\s+)\@xref\{
bad_pxref_re_ ?= (?:[.!?]|(?:see|also))\s+\@pxref\{
prohibit_undesirable_word_seq_RE_ ?=                    \
  /(?:\bcan\s+not\b|$(bad_xref_re_)|$(bad_pxref_re_))/gims

Either way, we do not need to check for xref in libvirt.

 cfg.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cfg.mk b/cfg.mk
index 2939458..e7db9a6 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -1299,3 +1299,8 @@ exclude_file_name_regexp--sc_prohibit_dt_without_code = \
 
 exclude_file_name_regexp--sc_prohibit_always-defined_macros = \
   ^tests/virtestmock.c$$
+
+# gnulib's CPU-hungry regex also checks if @xref starts a sequence
+# Use a custom regex since we do not use Texinfo
+prohibit_undesirable_word_seq_RE_ = \
+  /(?:\bcan\s+not\b)/gims
-- 
2.7.3