From: Hideki Yamane <henrich@debian.org>
Date: Fri, 9 Feb 2018 23:04:58 +0900
Subject: detect oniguruma without onig-config

---
 configure.ac | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 3c12182..0bd2e35 100644
--- a/configure.ac
+++ b/configure.ac
@@ -346,13 +346,10 @@ AC_MSG_CHECKING([whether to use Oniguruma])
 if test "$ac_cv_enable_oniguruma" = yes; then
 	AC_MSG_RESULT(yes)
 	AC_MSG_CHECKING([whether Oniguruma is available])
-        dnl AC_CHECK_PROG(ONIG_CONFIG, onig-config, onig-config)
-	ONIG_CONFIG=onig-config
-	ONIG_VERSION=`$ONIG_CONFIG --version 2>/dev/null`
-	if test "x$ONIG_VERSION" != "x"; then
+	if `pkg-config --exists oniguruma`; then
 		AC_MSG_RESULT(yes)
-		CFLAGS="$CFLAGS `$ONIG_CONFIG --cflags`"
-		LIBS="$LIBS `$ONIG_CONFIG --libs`"
+		CFLAGS="$CFLAGS `pkg-config --cflags oniguruma`"
+		LIBS="$LIBS `pkg-config --libs oniguruma`"
 		AC_DEFINE(USE_ONIGURUMA, 1, Define if you want to use Oniguruma.)
 	else
 		AC_MSG_RESULT(no)