bin/ld.exe: cannot find -lgmp collect2.exe: error: ld returned 1 exit status

Samir Sabri

If I try to install json gem, I get this error:

$ gem install json -v '2.1.0'
Fetching: json-2.1.0.gem (100%)
Temporarily enhancing PATH for MSYS/MINGW...
Building native extensions.  This could take a while...
ERROR:  Error installing json:
        ERROR: Failed to build gem native extension.

    current directory: C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0/ext/json/ext/generator
C:/laragon-ruby/bin/ruby/Ruby24-x64/bin/ruby.exe -r ./siteconf20181211-3760-18relmd.rb extconf.rb
creating Makefile

current directory: C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0/ext/json/ext/generator
make "DESTDIR=" clean

current directory: C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0/ext/json/ext/generator
make "DESTDIR="
generating generator-x64-mingw32.def
compiling generator.c
linking shared-object json/ext/generator.so
c:/laragon-ruby/bin/devkit/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.7.2/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgmp
collect2.exe: error: ld returned 1 exit status
make: *** [generator.so] Error 1

make failed, exit code 2

Gem files will remain installed in C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0 for inspection.
Results logged to C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/json-2.1.0/gem_make.out

$ cat C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/extensions/x64-mingw32/2.4.0/json-2.1.0/gem_make.out
current directory: C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0/ext/json/ext/generator
C:/laragon-ruby/bin/ruby/Ruby24-x64/bin/ruby.exe -r ./siteconf20181211-3760-18relmd.rb extconf.rb
creating Makefile

current directory: C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0/ext/json/ext/generator
make "DESTDIR=" clean

current directory: C:/laragon-ruby/bin/ruby/Ruby24-x64/lib/ruby/gems/2.4.0/gems/json-2.1.0/ext/json/ext/generator
make "DESTDIR="
generating generator-x64-mingw32.def
compiling generator.c
linking shared-object json/ext/generator.so
c:/laragon-ruby/bin/devkit/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.7.2/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgmp
collect2.exe: error: ld returned 1 exit status
make: *** [generator.so] Error 1

make failed, exit code 2

Please advice

leokhoa

@Samir-Sabri : Did you add DevKit (Menu > Tools > Quick add > DevKit)?

Samir Sabri

Thanks for quick response, I found that I have installed a ruby version without the devkit.
By the way, there is no Quick add menu at Menu > Tools >

leokhoa

@Samir-Sabri : You need to have Laragon 4.0+ for the Quick add feature.
https://forum.laragon.org/topic/1204/laragon-4-0-released-with-quick-add-feature