Using curb on Windows

[volkanunsal]

I am trying to install the curb gem. Since I need to have "A working (lib)curl installation, with development stuff" installed on my computer, I went to the cURL Download Wizard and downloaded this package.

But adding the bin into my PATH did not produce improvement and I still got an error when I try to install the curb gem, such as:

extconf.rb:19: Can't find libcurl or curl/curl.h (RuntimeError)

Even though, curl is already in the PATH.

I also tried raking the gem with this command:

rake install EXTCONF_OPTS='--with-curl-dir=B:\curl'

But all it fails saying "make failed" and throwing a bunch of errors like this:

C:/Ruby/lib/ruby/gems/1.8/gems/curb-0.7.7.1/ext/curb_postfield.c:76: undefined reference to 'imp_curl_formadd'

[volkanunsal]

Does anyone have an answer for this?

[phiggins]

@tenaciousflea: I installed curb on a Windows XP machine a few weeks ago, and when I had to do it on a second machine I decided to document my steps in case I had to do it a third time. You can see how I did it over here on my blog.

[volkanunsal]

The thing is I couldn't find libcurl for mingw32 anywhere. The download page is so complicated for that project, it's hopeless. In the end, I decided to use http://github.com/archiloque/rest-client

[taf2]

Yeah, really anytime you need to compile source on windows... it's not going to be an easy task... I've thought about setting up a mingw32 build environment and cross compiling binary win32 releases of curb, but don't have a need for it, since I don't use windows... if anyone else is interested in supporting it this would be a different story of course...

[ghazel]

I've had curb working with Windows for some time. To pass extconf args to gem, you need an extra pair of dashes. I used the "Win32 - Generic" package, specifically "Win32 2000/XP 7.21.3 libcurl SSL Günter Knauf 3.02 MB", http://www.gknw.net/mirror/curl/win32/curl-7.21.3-devel-mingw32.zip

gem install curb -- --with-curl-include=c:\Users\Greg\projects\curl-7.21.3-devel-mingw32\include --with-curl-lib=c:\Users\Greg\projects\curl-7.21.3-devel-mingw32\bin

A few notes:

• curb tends to have some C99 parts, so using MSVC won't work, you have to use DevKit/mingw (sadly)
• yes, point with-curl-lib at \bin not \lib. I believe this is some DevKit oddity.
• DevKit (sadly) does not support spaces in paths, so the include and lib dirs can't have them
• There are probably some directories you could copy (!) the libcurl lib and include files to so that they're picked up automatically, but I don't recommend it

[volkanunsal]

thanks

[abdufarag]

I have tried every thing but still cant install curb on Windows 10
C:>gem install curb -- --with-curl-lib="C:/curl-7.27.0-devel-mingw32/bin" --with-curl-include="C:/curl-7.27.0-devel-mingw32/include"
Temporarily enhancing PATH to include DevKit...
Building native extensions with: '--with-curl-lib=C:/curl-7.27.0-devel-mingw32/bin --with-curl-include=C:/curl-7.27.0-devel-mingw32/include'
This could take a while...
ERROR: Error installing curb:
ERROR: Failed to build gem native extension.

C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20170418-13264-4p5aww.rb extconf.rb --with-curl-lib=C:/curl-7.27.0-devel-mingw32/bin --with-curl-include=C:/curl-7.27.0-devel-mingw32/include

checking for curl-config... no
checking for main() in -lcurl... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.

Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=C:/Ruby22-x64/bin/$(RUBY_BASE_NAME)
--with-curl-dir
--without-curl-dir
--with-curl-include=${curl-dir}/include
--with-curl-lib=${curl-dir}/lib
--with-curllib
--without-curllib
extconf.rb:18:in `

': Can't find libcurl or curl/curl.h (RuntimeError)

Try passing --with-curl-dir or --with-curl-lib and --with-curl-include
options to extconf.

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/curb-0.9.3 for inspection.
Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/curb-0.9.3/gem_make.out