Bug #14623: backport r54737, r54740 and r55792

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 2.3 only
• Backport: 2.3: DONE, 2.4: DONTNEED, 2.5: DONTNEED

[usa (Usaku NAKAMURA)]

バックポート管理用チケットです。

[usa (Usaku NAKAMURA)]

• Related to Bug #12644: Support debug build on Windows with MSVC added

[usa (Usaku NAKAMURA)]

• Backport changed from 2.3: REQUIRED, 2.4: DONTNEED, 2.5: DONTNEED to 2.3: DONE, 2.4: DONTNEED, 2.5: DONTNEED