Linux SRV-16 6.18.44-paas #1 SMP PREEMPT_DYNAMIC Thu Aug 13 10:08:12 UTC 2026 x86_64

/proc/self/root/proc/self/root/opt/ruby-2.7/usr/share/ri/2.7.0/system/MakeMakefile/

//proc/self/root/proc/self/root/opt/ruby-2.7/usr/share/ri/2.7.0/system/MakeMakefile/have_var-i.ri

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::BlankLine�o; ; [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