Avoid adding `MRUBY_ROOT/src` to `cc.include_paths`
MODIFY
mrbgems/mruby-errno/mrbgem.rake
mrbgems/mruby-errno/mrbgem.rake
MRuby::Gem::Specification.new('mruby-errno') do |spec|
spec.license = 'MIT'
spec.authors = 'Internet Initiative Japan Inc.'
-
- spec.cc.include_paths << "#{build.root}/src"
end

MODIFY
mrbgems/mruby-io/mrbgem.rake
mrbgems/mruby-io/mrbgem.rake
@@ -3,8 +3,6 @@ MRuby::Gem::Specification.new('mruby-io') do |spec|
spec.authors = ['Internet Initiative Japan Inc.', 'mruby developers']
spec.summary = 'IO and File class'
- spec.cc.include_paths << "#{build.root}/src"
-
if spec.for_windows?
spec.linker.libraries << "ws2_32"
end

MODIFY
mrbgems/mruby-pack/mrbgem.rake
mrbgems/mruby-pack/mrbgem.rake
@@ -2,6 +2,4 @@ MRuby::Gem::Specification.new('mruby-pack') do |spec|
spec.license = 'MIT'
spec.authors = ['Internet Initiative Japan Inc.', 'mruby developers']
spec.summary = 'Array#pack and String#unpack method'
-
- spec.cc.include_paths << "#{build.root}/src"
end

MODIFY
mrbgems/mruby-socket/mrbgem.rake
mrbgems/mruby-socket/mrbgem.rake
@@ -3,7 +3,6 @@ MRuby::Gem::Specification.new('mruby-socket') do |spec|
spec.authors = ['Internet Initiative Japan', 'mruby developers']
spec.summary = 'standard socket class'
- spec.cc.include_paths << "#{build.root}/src"
#spec.cc.defines << "HAVE_SA_LEN=0"
# If Windows, use winsock

Avoid adding `MRUBY_ROOT/src` to `cc.include_paths`