### Checks for programs
AC_PROG_CC
+# pkg-config
+PKG_PROG_PKG_CONFIG
+
+# Check whether pkg-config supports Requires.private
+if $PKG_CONFIG --atleast-pkgconfig-version 0.22; then
+ pkgconfig_requires_private="Requires.private"
+else
+ pkgconfig_requires_private="Requires"
+fi
+AC_SUBST(pkgconfig_requires_private)
+
+
# doxygen program for documentation building
EFL_CHECK_DOXYGEN([build_doc="yes"], [build_doc="no"])