# Windows 7 - building win32/api gem **URL:** \ **Category:** Ruby\ **Created:** [March 3, 2009, 11:51am UTC](https://www.ruby-forum.com/t/windows-7-building-win32-api-gem/161882 "2009-03-03T11:51:37Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![swozniak](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/e9a140/32.png) [@swozniak](https://www.ruby-forum.com/u/swozniak)\ **Post date:** [March 3, 2009, 11:51am UTC](https://www.ruby-forum.com/t/windows-7-building-win32-api-gem/161882/1 "2009-03-03T11:51:37Z")
Hi Guys, I have been trying to install win32-api 1.4.0 gem on windows 7 x64 but no success. When i install x86 version, require ‘win32/api’ gives me following error: LoadError: 193: %1 is not a valid Win32 application. - c:/ruby/lib/ruby/gems/1.9.1/gems/win32-api-1.4.0-x86-mswin32-60/lib/win32/api.so from (irb):1:in `require' from (irb):1 from c:/ruby/bin/irb.bat:20:in`’ My ruby: ruby 1.9.1p0 (2009-01-30 revision 21907) [x64-mswin64\_80] My gems: 1.3.1 I have VS2008 installed and even managed to create a makefile but it complains about following: C:\>gem install win32-api Building native extensions. This could take a while… ERROR: Error installing win32-api: ERROR: Failed to build gem native extension. c:/ruby/bin/ruby.exe extconf.rb install win32-api checking for strncpy\_s()… yes creating Makefile nmake Microsoft ® Program Maintenance Utility Version 9.00.21022.08 Copyright © Microsoft Corporation. All rights reserved. ``` c:\ruby\bin\ruby -e "puts 'EXPORTS', 'Init_api'" > ``` api-x64-mswin64\_80.def cl -nologo -I. -Ic:/ruby/include/ruby-1.9.1/x64-mswin64\_80 -Ic:/ruby/include/ruby-1.9.1/ruby/backward -Ic:/ruby/include/ruby-1.9.1 -Iwin32 -MD -Zi -O2b 2xty- -Zm600 -DHAVE\_STRNCPY\_S -D\_CRT\_SECURE\_NO\_DEPRECATE -D\_CRT\_NONSTDC\_NO\_DEPRECATE -Foapi.obj -c -Tcwin32/api.c api.c cl -nologo -LD -Feapi.so api.obj msvcr80-ruby191.lib oldnames.lib user32.lib advapi32.lib shell32.lib ws2\_32.lib -link -incremental:no -debug -opt:re f -opt:icf -dll -libpath:"." -libpath:“c:/ruby/lib” -implib:api-x64-mswin64\_80.lib -pdb:api-x64-mswin64\_80.pdb -def:api-x64-mswin64\_80.def Creating library api-x64-mswin64\_80.lib and object api-x64-mswin64\_80.exp api.obj : error LNK2019: unresolved external symbol \_rb\_num2long referenced in function \_NUM2LONG api.obj : error LNK2019: unresolved external symbol \_rb\_int2big referenced in function \_LONG2NUM api.obj : error LNK2019: unresolved external symbol \_rb\_uint2big referenced in function \_ULONG2NUM api.obj : error LNK2019: unresolved external symbol \_rb\_data\_object\_alloc referenced in function \_api\_allocate api.obj : error LNK2019: unresolved external symbol \_rb\_raise referenced in function \_StringError api.obj : error LNK2019: unresolved external symbol \_rb\_iv\_set referenced in function \_callback\_init api.obj : error LNK2019: unresolved external symbol \_rb\_str\_new\_cstr referenced in function \_callback\_init api.obj : error LNK2019: unresolved external symbol \_rb\_scan\_args referenced in function \_callback\_init api.obj : error LNK2019: unresolved external symbol \_rb\_string\_value\_ptr referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_str\_cat referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_str\_new\_shared referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_check\_safe\_obj referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_string\_value referenced in function \_api\_init api.obj : error LNK2001: unresolved external symbol \_\_imp\_\_rb\_eArgError api.obj : error LNK2019: unresolved external symbol \_rb\_ary\_push referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_ary\_new referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_str\_split referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_respond\_to referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_intern referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_check\_type referenced in function \_api\_init api.obj : error LNK2019: unresolved external symbol \_rb\_str\_modify referenced in function \_CallbackFunction api.obj : error LNK2019: unresolved external symbol \_rb\_num2ulong referenced in function \_CallbackFunction api.obj : error LNK2019: unresolved external symbol \_rb\_funcall2 referenced in function \_CallbackFunction api.obj : error LNK2019: unresolved external symbol \_rb\_iv\_get referenced in function \_CallbackFunction api.obj : error LNK2019: unresolved external symbol \_rb\_str\_new referenced in function \_api\_call api.obj : error LNK2019: unresolved external symbol \_rb\_define\_const referenced in function \_Init\_api api.obj : error LNK2019: unresolved external symbol \_rb\_define\_attr referenced in function \_Init\_api api.obj : error LNK2019: unresolved external symbol \_rb\_define\_method referenced in function \_Init\_api api.obj : error LNK2019: unresolved external symbol \_rb\_define\_alloc\_func referenced in function \_Init\_api api.obj : error LNK2001: unresolved external symbol \_\_imp\_\_rb\_eRuntimeError api.obj : error LNK2019: unresolved external symbol \_rb\_define\_class\_under referenced in function \_Init\_api api.obj : error LNK2001: unresolved external symbol \_\_imp\_\_rb\_cObject api.obj : error LNK2019: unresolved external symbol \_rb\_define\_module referenced in function \_Init\_api api.so : fatal error LNK1120: 33 unresolved externals NMAKE : fatal error U1077: ‘“C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\BIN\cl.EXE”’ : return code ‘0x2’ Stop. Gem files will remain installed in c:/ruby/lib/ruby/gems/1.9.1/gems/win32-api-1.4.0 for inspection. Results logged to c:/ruby/lib/ruby/gems/1.9.1/gems/win32-api-1.4.0/ext/gem\_make.out Does anyone have any idea about building gem on windows? Or maybe you have precompiled api.so on your x64 system. I would appreciate your help. ---
**Author:** ![swozniak](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/e9a140/32.png) [@swozniak](https://www.ruby-forum.com/u/swozniak)\ **Post date:** [March 3, 2009, 4:37pm UTC](https://www.ruby-forum.com/t/windows-7-building-win32-api-gem/161882/2 "2009-03-03T16:37:47Z")
Hi, 2009/3/3 Stanislaw W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > Â Â Â Â from (irb):1:in `require’ > complains about following: > nmake > -D\_CRT\_NONSTDC\_NO\_DEPRECATE -Foapi.obj -c -Tcwin32/api.c > api.c > … > > Does anyone have any idea about building gem on windows? Or maybe you > have precompiled api.so on your x64 system. I guess you tried to build win32-api module with Visual C++ 9.0. You must use the same compiler with the Ruby version(x64-mswin64\_80). After some trials and errors, I managed to build win32-api module with Visual C++ 8.0. You can download at [http://121.78.227.9/win32-api-1.4.0/lib/win32/api.so](http://121.78.227.9/win32-api-1.4.0/lib/win32/api.so) NB, Using win32utils on the 64bit Ruby is not tested. Regards, Park H. ---
**Author:** ![swozniak](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/e9a140/32.png) [@swozniak](https://www.ruby-forum.com/u/swozniak)\ **Post date:** [March 3, 2009, 4:54pm UTC](https://www.ruby-forum.com/t/windows-7-building-win32-api-gem/161882/3 "2009-03-03T16:54:08Z")
Thanks for your help, it worked like a charm. For my future reference, is VC++ 8.0 included in Visual Studio 2005? ---
**Author:** ![swozniak](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/e9a140/32.png) [@swozniak](https://www.ruby-forum.com/u/swozniak)\ **Post date:** [March 3, 2009, 4:55pm UTC](https://www.ruby-forum.com/t/windows-7-building-win32-api-gem/161882/4 "2009-03-03T16:55:56Z")
And BTW, would you mind sharing how to setup build environment and how to build extensions on windows? I am installing VS2005 as we speak ---
**Author:** ![swozniak](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/e9a140/32.png) [@swozniak](https://www.ruby-forum.com/u/swozniak)\ **Post date:** [March 4, 2009, 2:04am UTC](https://www.ruby-forum.com/t/windows-7-building-win32-api-gem/161882/5 "2009-03-04T02:04:04Z")
Hi, 2009/3/4 Stanislaw W. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > And BTW, would you mind sharing how to setup build environment and how > to build extensions on windows? I am installing VS2005 as we speak Build environment is just Visual Studio 2005 x64 command prompt. The ruby 1.9.1p0 (2009-01-30 revision 21907) [x64-mswin64\_80] distribution lacks win32.h file in \include\ruby-1.9.1\ruby folder. Coping win32.h from ruby 1.9.1p0 source code to the above folder is required. This subject is more suitable on win32utils-devel mailing list. Please join at [http://rubyforge.org/mail/?group\_id=85](http://rubyforge.org/mail/?group_id=85) for more discussion. Regards, Park H.