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instance method

MakeMakefile#have_library

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

# File tmp/rubies/ruby-4.1.0-preview1/lib/mkmf.rb, line 1134
def have_library(lib, func = nil, headers = nil, opt = "", &b)
  dir_config(lib)
  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

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.

See also #have_header #have_macro #have_func #have_struct_member also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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