U:RDoc::AnyMethod[iI"
have_var:ETI"MakeMakefile#have_var;TF:publico:RDoc::Markup::Document:@parts[
o:RDoc::Markup::Paragraph;	[	I"JReturns whether or not the variable +var+ can be found in the common ;TI"Pheader files, or within any +headers+ that you provide.  If found, a macro ;TI"Mis passed as a preprocessor constant to the compiler using the variable ;TI"0name, in uppercase, prepended with +HAVE_+.;To:RDoc::Markup::BlankLineo;
;	[I"ITo check variables in an additional library, you need to check that ;TI"5library first using <code>have_library()</code>.;T@o;
;	[I"JFor example, if <code>have_var('foo')</code> returned true, then the ;TI"C+HAVE_FOO+ preprocessor macro would be passed to the compiler.;T:
@fileI"lib/mkmf.rb;T:0@omit_headings_from_table_of_contents_below000[I"'(var, headers = nil, opt = "", &b);T@FI"MakeMakefile;TcRDoc::NormalModule00