MakeMakefile#have_framework

have_framework(fw, &b)

# File tmp/rubies/ruby-3.4.1/lib/mkmf.rb, line 1261
def have_framework(fw, &b)
  if Array === fw
    fw, header = *fw
  else
    header = "#{fw}.h"
  end
  checking_for fw do
    src = cpp_include("#{fw}/#{header}") << "\n" "int main(void){return 0;}"
    opt = " -framework #{fw}"
    if try_link(src, opt, &b) or (objc = try_link(src, "-ObjC#{opt}", &b))
      $defs.push(format("-DHAVE_FRAMEWORK_%s", fw.tr_cpp))
      # TODO: non-worse way than this hack, to get rid of separating
      # option and its argument.
      $LDFLAGS << " -ObjC" if objc and /(\A|\s)-ObjC(\s|\z)/ !~ $LDFLAGS
      $LIBS << opt
      true
    else
      false
    end
  end
end

Returns whether or not the given framework can be found on your system. If found, a macro is passed as a preprocessor constant to the compiler using the framework name, in uppercase, prepended with HAVE_FRAMEWORK_.

For example, if have_framework('Ruby') returned true, then the HAVE_FRAMEWORK_RUBY preprocessor macro would be passed to the compiler.

If fw is a pair of the framework name and its header file name that header file is checked, instead of the normally used header file which is named same as the framework.

See also #find_library #have_func #find_header #have_header also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0

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