man pages: allow underscores in match and target names

Signed-off-by: Maciej Zenczykowski <maze@google.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/extensions/GNUmakefile.in b/extensions/GNUmakefile.in
index 74a058c141cd01af566c8958db27bb40d514053d..b96bd11f403c3815bd5ac61b2f419f47775c2559 100644 (file)
--- a/extensions/GNUmakefile.in
+++ b/extensions/GNUmakefile.in
@@ -155,8 +155,8 @@ initext6.c: .initext6.dd
 #
 #      Manual pages
 #
-ex_matches = $(sort $(shell echo $(1) | LC_ALL=POSIX grep -Eo '\b[[:alnum:]]+\b'))
-ex_targets = $(sort $(shell echo $(1) | LC_ALL=POSIX grep -Eo '\b[[:alnum:]]+\b'))
+ex_matches = $(sort $(shell echo $(1) | LC_ALL=POSIX grep -Eo '\b[[:alnum:]_]+\b'))
+ex_targets = $(sort $(shell echo $(1) | LC_ALL=POSIX grep -Eo '\b[[:alnum:]_]+\b'))
 man_run    = \
        ${AM_VERBOSE_GEN} \
        for ext in $(1); do \