Use the "js buildsys".

configure.ac

@@ -0,0 +1,60 @@
+AC_INIT(ObjXMPP, 0.1, js@webkeks.org)
+AC_CONFIG_SRCDIR(src)
+
+AC_PATH_TOOL(OBJFW_CONFIG, objfw-config)
+OBJC="$($OBJFW_CONFIG --objc)"
+
+AC_LANG([Objective C])
+AC_PROG_OBJC
+AC_PROG_OBJCPP
+AC_PROG_LN_S
+AC_PROG_INSTALL
+
+CPP="$OBJCPP"
+CPPFLAGS="$CPPFLAGS $OBJCPPFLAGS $($OBJFW_CONFIG --cppflags)"
+OBJCFLAGS="$OBJCFLAGS -Wall $($OBJFW_CONFIG --objcflags)"
+LDFLAGS="$LDFLAGS $($OBJFW_CONFIG --ldflags)"
+LIBS="$LIBS $($OBJFW_CONFIG --libs)"
+
+AC_ARG_ENABLE(shared,
+	AS_HELP_STRING([--disabel-shared], [do not build shared library]))
+AS_IF([test x"$enable_shared" != x"no"], [
+	BUILDSYS_SHARED_LIB
+	AC_SUBST(OBJXMPP_SHARED_LIB, "${LIB_PREFIX}objxmpp${LIB_SUFFIX}")
+])
+AC_ARG_ENABLE(static, AS_HELP_STRING([--enable-static], [build static library]))
+AS_IF([test x"$enable_static" = x"yes" -o x"$enable_shared" = x"no"], [
+	AC_PATH_TOOL(AR, ar)
+	AC_PROG_RANLIB
+	AC_SUBST(OBJXMPP_STATIC_LIB, "libobjxmpp.a")
+])
+
+AC_CHECK_LIB(objopenssl, main, [
+	LIBS="$LIBS -lobjopenssl"
+], [
+	AC_MSG_ERROR(You need ObjOpenSSL installed!)
+])
+
+PKG_CHECK_MODULES(libidn, [libidn >= 0.25], [
+	CPPFLAGS="$CPPFLAGS $libidn_CFLAGS"
+	LIBS="$LIBS $libidn_LIBS"
+], [
+	AC_MSG_ERROR(You need at least libidn 2.5 installed!)
+])
+
+AS_IF([test x"$GOBJC" = x"yes"], [
+	OBJCFLAGS="$OBJCFLAGS -Wwrite-strings -Wcast-align -Wpointer-arith"
+	OBJCFLAGS="$OBJCFLAGS -Werror"
+])
+
+BUILDSYS_INIT
+BUILDSYS_TOUCH_DEPS
+
+dnl We don't call AC_PROG_CPP, but only AC_PROG_OBJCPP and set CPP to OBJCPP
+dnl and add OBJCPPA.FLAGS to CPPFLAGS, thus we need to AC_SUBST these ourself
+AC_SUBST(CPP)
+AC_SUBST(CPPFLAGS)
+
+AC_SUBST(PACKAGE, ObjFW)
+AC_CONFIG_FILES([buildsys.mk extra.mk])
+AC_OUTPUT