Description: Use PKG_PROG_PKG_CONFIG instead of AC_PATH_CONFIG
Author: أحمد المحمودي (Ahmed El-Mahmoudy) <aelmahmoudy@users.sourceforge.net>
Forwarded: https://github.com/gtkwave/gtkwave/pull/206

Index: gtkwave/configure.ac
===================================================================
--- gtkwave.orig/configure.ac	2023-06-04 22:39:26.741992895 +0200
+++ gtkwave/configure.ac	2023-06-04 23:29:54.030424581 +0200
@@ -606,7 +606,7 @@
 # ------------- GTK -------------------
 if test "X$GTK3" = "Xyes" ; then
 
-	AC_PATH_PROG(PKG_CONFIG, [pkg-config], [notfound])
+	PKG_PROG_PKG_CONFIG()
         PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.0.0)
         GTK_VER=`$PKG_CONFIG gtk+-3.0 --modversion`
 
@@ -642,7 +642,7 @@
 
 else
 
-	AC_PATH_PROG(PKG_CONFIG, [pkg-config], [notfound])
+	PKG_PROG_PKG_CONFIG()
 	PKG_CHECK_MODULES(GTK, gtk+-2.0 >= 2.24.9)
 	GTK_VER=`$PKG_CONFIG gtk+-2.0 --modversion`