[ruby-core:54589] [ruby-trunk - Bug #7856][Closed] The usage of try_run in extconf.rb is broken when crosscompiling

Issue #7856 has been updated by akr (Akira Tanaka).

Status changed from Feedback to Closed

I modified ext/socket/extconf.rb (r40464 and r40466)
and ext/curses/extconf.rb (r40468).

I think they don't use try_run while cross compiling after r40468.

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Bug #7856: The usage of try_run in extconf.rb is broken when crosscompiling
https://bugs.ruby-lang.org/issues/7856#change-38911

Author: luizluca (Luiz Angelo Daros de Luca)
Status: Closed
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: ext
Target version: next minor
ruby -v: 1.9.2p0
Backport: 


Hello,

Every "try_run" inside extconf.rb (found in some ext/*/extconf.rb) tries to compile and run the generated binary. However,
when crosscompiling, this simply can't work.

Please, make try_run be ignored (or just test the compilation) when crosscompiling is detected. I tested this only at 1.9.2
but this might affect all versions that uses try_run to test dependencies.

Taking socket as an example, this can be solved individually, from the original:

getaddr_info_ok = (enable_config("wide-getaddrinfo") && :wide) ||
  (checking_for("wide getaddrinfo") {try_run(<<EOF)} && :os)

to:

getaddr_info_ok = (enable_config("wide-getaddrinfo") && :wide) ||
  (CROSS_COMPILING && :cross) ||
  (checking_for("wide getaddrinfo") {try_run(<<EOF)} && :os)

or just allow the check for every try_run to be manually defined in ./configure script
like:

getaddr_info_ok = (enable_config("wide-getaddrinfo") && :wide) ||
  (enable_config("ignore-getaddr_info-check") && :manual ) ||
  (CROSS_COMPILING && <warn the user to use --ignore-getaddr_info-check> && false) ||
  (checking_for("wide getaddrinfo") {try_run(<<EOF)} && :os)

Regards,



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