akr	2013-05-08 21:39:38 +0900 (Wed, 08 May 2013)

  New Revision: 40611

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=40611

  Log:
    Add a comment.

  Modified files:
    trunk/configure.in

Index: configure.in
===================================================================
--- configure.in	(revision 40610)
+++ configure.in	(revision 40611)
@@ -1428,7 +1428,7 @@ dnl Check whether we need to define sys_ https://github.com/ruby/ruby/blob/trunk/configure.in#L1428
 AC_CHECK_DECLS([sys_nerr], [], [], [$ac_includes_default
 @%:@include <errno.h>])
 
-AC_CHECK_LIB(crypt, crypt)
+AC_CHECK_LIB(crypt, crypt)      # GNU/Linux
 AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
 AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX
 AC_CHECK_LIB(socket, socketpair)	# SunOS/Solaris

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