+AS_IF([test -n "${CONTRIB_DIR}"], [
+ AC_MSG_RESULT([${CONTRIB_DIR}])
+ export PATH=${CONTRIB_DIR}/bin:$PATH
+ CPPFLAGS="${CPPFLAGS} -I${CONTRIB_DIR}/include"
+ CPPFLAGS_save="${CPPFLAGS_save} -I${CONTRIB_DIR}/include"
+ CFLAGS="${CFLAGS} -I${CONTRIB_DIR}/include"
+ CFLAGS_save="${CFLAGS_save} -I${CONTRIB_DIR}/include"
+ CXXFLAGS="${CXXFLAGS} -I${CONTRIB_DIR}/include"
+ CXXFLAGS_save="${CXXFLAGS_save} -I${CONTRIB_DIR}/include"
+ OBJCFLAGS="${OBJCFLAGS} -I${CONTRIB_DIR}/include"
+ OBJCFLAGS_save="${OBJCFLAGS_save} -I${CONTRIB_DIR}/include"
+ AS_IF([test "$build" = "$host" -o "$PKG_CONFIG_LIBDIR"], [
+ export PKG_CONFIG_PATH="${CONTRIB_DIR}/lib/pkgconfig:$PKG_CONFIG_PATH"
+ ], [
+ export PKG_CONFIG_LIBDIR="${CONTRIB_DIR}/lib/pkgconfig"
+ ])
+ LDFLAGS="${LDFLAGS} -L${CONTRIB_DIR}/lib"
+ LDFLAGS_save="${LDFLAGS_save} -L${CONTRIB_DIR}/lib"
+
+ AS_IF([test "${SYS}" = "darwin"], [
+ export LD_LIBRARY_PATH="${CONTRIB_DIR}/lib:$LD_LIBRARY_PATH"
+ export DYLD_LIBRARY_PATH="${CONTRIB_DIR}/lib:$DYLD_LIBRARY_PATH"
+ ])
+], [
+ AS_IF([test -n "${with_contrib}" && test "${with_contrib}" != "no"], [
+ AC_MSG_ERROR([Third party libraries not found!])
+ ])
+])
+AC_SUBST(CONTRIB_DIR)