method

have_library

v2_5_5 - Show latest stable - 0 notes - Class: MakeMakefile

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What's this?

have_library(lib, func = nil, headers = nil, opt = "", &b) public

Returns whether or not the given entry point func can be found within lib. If func is nil, the main() entry point is used by default. If found, it adds the library to list of libraries to be used when linking your extension.

If headers are provided, it will include those header files as the header files it looks in when searching for func.

The real name of the library to be linked can be altered by –with-FOOlib configuration option.

Show source

# File lib/mkmf.rb, line 997
  def have_library(lib, func = nil, headers = nil, opt = "", &b)
    lib = with_config(lib+'lib', lib)
    checking_for checking_message(func && func.funcall_style, LIBARG%lib, opt) do
      if COMMON_LIBS.include?(lib)
        true
      else
        libs = append_library($libs, lib)
        if try_func(func, libs, headers, opt, &b)
          $libs = libs
          true
        else
          false
        end
      end
    end
  end

have_library

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