Fix to use absolute path on creating depend

Author: yoshoku

ext/numo/linalg/blas/depend.erb

@@ -1,5 +1,5 @@
-COGEN=ruby gen/cogen.rb -l
-GENDEPS=gen/*.rb tmpl/*.c
+COGEN=<%= "ruby #{__dir__}/gen/cogen.rb -l" %>
+GENDEPS=<%= "#{__dir__}/gen/*.rb #{__dir__}/tmpl/*.c" %>
 
 <%
 srcs = %w[s d c z].map{|c| [c, "blas_#{c}.c"]}

ext/numo/linalg/blas/extconf.rb

@@ -36,5 +36,5 @@
 end
 
 create_site_conf
-create_depend
+create_depend(__dir__)
 create_makefile('numo/linalg/blas')

ext/numo/linalg/lapack/depend.erb

@@ -1,5 +1,5 @@
-COGEN=ruby gen/cogen.rb -l
-GENDEPS=gen/*.rb tmpl/*.c
+COGEN=<%= "ruby #{__dir__}/gen/cogen.rb -l" %>
+GENDEPS=<%= "#{__dir__}/gen/*.rb #{__dir__}/tmpl/*.c" %>
 
 <%
 srcs = %w[s d c z].map{|c| [c, "lapack_#{c}.c"]}

ext/numo/linalg/lapack/extconf.rb

@@ -36,5 +36,5 @@
   exit(1) unless have_func("LoadLibrary")
 end
 
-create_depend
+create_depend(__dir__)
 create_makefile('numo/linalg/lapack')

ext/numo/linalg/mkmf_linalg.rb

@@ -69,12 +69,12 @@ def find_libnarray_a
   end
 end
 
-def create_depend
+def create_depend(base_dir)
   require 'erb'
   message "creating depend\n"
-  dep_path = File.join(Dir.pwd, "depend")
+  dep_path = "#{base_dir}/depend"
   File.open(dep_path, "w") do |dep|
-    dep_erb_path = File.join(Dir.pwd, "depend.erb")
+    dep_erb_path = "#{base_dir}/depend.erb"
     File.open(dep_erb_path, "r") do |dep_erb|
       erb = ERB.new(dep_erb.read)
       erb.filename = dep_erb_path