method

have_header

Ruby latest stable (v2_5_5) - 0 notes - Class: Object

1_8_6_287
1_8_7_72
1_8_7_330
1_9_1_378 (0)
1_9_2_180 (0)
1_9_3_125 (0)
1_9_3_392 (0)
2_1_10
2_2_9
2_4_6
2_5_5
2_6_3
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Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v1_9_3_392) is shown here.

These similar methods exist in v2_5_5:

MakeMakefile#have_header

have_header(header, preheaders = nil, &b) public

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

For example, if have_header(‘foo.h’) returned true, then the HAVE_FOO_H preprocessor macro would be passed to the compiler.

Show source

# File lib/mkmf.rb, line 929
def have_header(header, preheaders = nil, &b)
  checking_for header do
    if try_header(cpp_include(preheaders)+cpp_include(header), &b)
      $defs.push(format("-DHAVE_%s", header.tr_cpp))
      true
    else
      false
    end
  end
end

have_header

Related methods

Method deprecated or moved