Module: GoGem::Mkmf

Defined in:
_gem/lib/go_gem/mkmf.rb

Overview

Helper module for creating Go Makefiles

Instance Method Summary collapse

Instance Method Details

#create_go_makefile(target, srcprefix = nil) ⇒ Object

Create Makefile for go-gem

Examples:

require "mkmf"
require "go_gem/mkmf" # Append this

# Use create_go_makefile instead of create_makefile
# create_makefile("example/example")
create_go_makefile("example/example")

Parameters:

  • target (String)
  • srcprefix (String, nil) (defaults to: nil) 


18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File '_gem/lib/go_gem/mkmf.rb', line 18

def create_go_makefile(target, srcprefix = nil)
  find_executable("go")

  # rubocop:disable Style/GlobalVars
  $objs = []
  # @private
  def $objs.empty?; false; end
  # rubocop:enable Style/GlobalVars

  create_makefile(target, srcprefix)

  case `#{RbConfig::CONFIG["CC"]} --version` # rubocop:disable Lint/LiteralAsCondition
  when /Free Software Foundation/
    ldflags = "-Wl,--unresolved-symbols=ignore-all"
  when /clang/
    ldflags = "-undefined dynamic_lookup"
  end

  current_dir = File.expand_path(".")

  File.open("Makefile", "a") do |f|
    f.write <<~MAKEFILE.gsub(/^ {8}/, "\t")
      $(DLLIB): Makefile $(srcdir)/*.go
              cd $(srcdir); \
              CGO_CFLAGS='$(INCFLAGS)' CGO_LDFLAGS='#{ldflags}' \
                go build -p 4 -buildmode=c-shared -o #{current_dir}/$(DLLIB)
    MAKEFILE
  end
end