Fix wrong include path

Author: katzer

mrbgem.rake

@@ -27,12 +27,15 @@ MRuby::Gem::Specification.new('mruby-process') do |spec|
   spec.license = 'MIT'
   spec.authors = 'mruby developers'
 
-  spec.add_test_dependency 'mruby-print',       core: 'mruby-print'
-  spec.add_test_dependency 'mruby-env',         mgem: 'mruby-env'
-  spec.add_test_dependency 'mruby-os',          mgem: 'mruby-os'
+  spec.add_test_dependency 'mruby-print', core: 'mruby-print'
+  spec.add_test_dependency 'mruby-env',   mgem: 'mruby-env'
+  spec.add_test_dependency 'mruby-os',    mgem: 'mruby-os'
 
-  spec.mruby.cc.defines       << 'HAVE_MRB_PROCESS_H'
-  spec.mruby.cc.include_paths << "#{build_dir}/include"
+  spec.mruby.cc.defines << 'HAVE_MRB_PROCESS_H'
+
+  [spec.cc, spec.mruby.cc].each do |cc|
+    cc.include_paths << "#{spec.dir}/include/mruby/ext"
+  end
 
   ENV['RAND'] = Time.now.to_i.to_s if build.test_enabled?
 

src/posix.c

@@ -25,7 +25,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
-
 #include <sys/stat.h>
 #include <fcntl.h>
 

src/win32.c

@@ -27,7 +27,6 @@
 #include <windows.h>
 #include <process.h>
 #include <errno.h>
-
 #include <tchar.h>
 #include <stdio.h>