Issue #10821 has been updated by Yui NARUSE. Backport changed from 2.0.0: UNKNOWN, 2.1: REQUIRED, 2.2: REQUIRED to 2.0.0: UNKNOWN, 2.1: REQUIRED, 2.2: DONE ruby_2_2 r49581 merged revision(s) 49482,49487. ---------------------------------------- Bug #10821: mkmf.rb: Incorrect have_devel? test depending on run order https://bugs.ruby-lang.org/issues/10821#change-51485 * Author: Joshua Peek * Status: Closed * Priority: Normal * Assignee: * ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin14.0] * Backport: 2.0.0: UNKNOWN, 2.1: REQUIRED, 2.2: DONE ---------------------------------------- have_devel? is usually lazily checked on the first call to try_do(). However, try_do() may be invoked within the scope of a with_ldflags or with_cflags block. If have_devel? is checked for the first time with altered test LDFLAGS or CFLAGS it may crash. ~~~ # extconf.rb $LDFLAGS = "-L/custom/path/to/lib try_ldflags "-Issl" # try_ldflags -> try_link -> try_do -> have_devel (with incorrect $LDFLAG in scope) ~~~ -- https://bugs.ruby-lang.org/