mesonbuild/meson

ninja build or ninja reconfigure does not detect dependency changes

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#2,475 建立於 2017年10月11日

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bugdependencieshelp wanted

描述

Hi,

I've got:

gmime3   = dependency ('gmime-3.0', required : false)
gmime2   = dependency ('gmime-2.6', required : false)

if gmime3.found ()
  gmime = gmime3
  gmime_gir = 'GMime-3.0'
elif gmime2.found ()
  gmime = gmime2
  gmime_gir = 'GMime-2.6'
else
  error ('neither gmime3 or gmime2 available')
  gmime_gir = ''
endif

deps = [ gmime ]

if gmime2 or gmime3 is installed/un-installed ninja reconfigure does not reliably detect the change. E.g. uninstalling gmime3, and installing gmime2 still tries to use gmime3 build commands. Have to delete dir and re-configure. Seems to sometimes work the other way.. which keeps breaking my separate build dir.

貢獻者指南

技術棧
python
領域
build system
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
4
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
over 1 week
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
needs investigation
前置要求
Understanding of Meson build systemFamiliarity with Ninja build tool
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
20
研究方向
Investigate how Meson currently tracks dependencies and triggers reconfiguration. Look at the code in 'mesonbuild/dependencies/' and how external dependency changes are detected. The issue indicates that ninja reconfigure does not reliably detect installation/uninstallation of gmime libraries; perhaps the dependency hash or timestamps are not being checked. Review linked discussions or similar issues for clues.