Index: b/configure.ac
===================================================================
--- b/configure.ac
+++ b/configure.ac
@@ -85,6 +85,7 @@
 # for Qt and autoconf does does not allow that.
 AC_PROG_CXX
 AC_PROG_LN_S
+PKG_PROG_PKG_CONFIG
 AC_CHECK_TOOL(WINDRES, windres, :)
 AC_CHECK_PROGS(GITLOG_TO_CHANGELOG, gitlog-to-changelog,
                [build-aux/gitlog-to-changelog])
@@ -430,8 +431,7 @@
 
 dnl check for pkg-config
 if test "$pinentry_gtk_2" != "no" -o "$pinentry_gnome_3" != "no"; then
-        AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-	if test x"${PKG_CONFIG}" = xno ; then
+	if test -z "${PKG_CONFIG}"; then
 		pinentry_gtk_2=no
 		pinentry_gnome_3=no
 	fi
@@ -504,8 +504,7 @@
 
 dnl check for pkg-config
 if test "$libsecret" != "no"; then
-        AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-	if test x"${PKG_CONFIG}" = xno ; then
+	if test -z "${PKG_CONFIG}" ; then
 		libsecret=no
 	fi
 fi