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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 57d0943a07..21f9f1694d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -842,7 +842,7 @@ AC_PATH_PROG(SPHINXBUILD,sphinx-build)
AC_CACHE_CHECK([for version of sphinx-build], fp_cv_sphinx_version,
changequote(, )dnl
[if test -n "$SPHINXBUILD"; then
- fp_cv_sphinx_version=`"$SPHINXBUILD" --version 2>&1 | sed 's/Sphinx\( (sphinx-build)\)\? v\?\([0-9]\.[0-9]\.[0-9]\)/\2/' | head -n1`;
+ fp_cv_sphinx_version=`"$SPHINXBUILD" --version 2>&1 | sed 's/.* v\?\([0-9]\.[0-9]\.[0-9]\)/\1/' | head -n1`;
fi;
changequote([, ])dnl
])