correctly link ruby bindings

fixes #1279

diff --git a/bindings/ruby/extconf.rb b/bindings/ruby/extconf.rb
index 882b0b0718078efc89bcc6f74ae61cfd69b59223..de0171dc6d700a0c26309e0fd4120813ff16e026 100644 (file)
--- a/bindings/ruby/extconf.rb
+++ b/bindings/ruby/extconf.rb
@@ -13,6 +13,10 @@ elsif /aix/ =~ RUBY_PLATFORM
    $LDFLAGS += ' -blibpath:$(EPREFIX)/lib'
 end
 
-dir_config("rrd",['$(ABS_TOP_BUILDDIR)/src', '$(ABS_TOP_SRCDIR)/src'],'$(ABS_TOP_BUILDDIR)/src/.libs')
+ABS_TOP_BUILDDIR = ENV['ABS_TOP_BUILDDIR'] || '../..'
+ABS_TOP_SRCDIR = ENV['ABS_TOP_SRCDIR'] || '../..'
+
+
+dir_config("rrd", ["#{ABS_TOP_BUILDDIR}/src", "#{ABS_TOP_SRCDIR}/src"], "#{ABS_TOP_BUILDDIR}/src/.libs")
 have_library("rrd", "rrd_create")
 create_makefile("RRD")