D25501: FreeBSD: lld does not support -Wl,-z,nodump

[Tobias C. Berner]

tcberner created this revision.
tcberner added reviewers: FreeBSD, KStars.
Herald added a project: KDE Edu.
Herald added a subscriber: kde-edu.
tcberner requested review of this revision.

REVISION SUMMARY
  kstars appends -Wl,-z,nodump to the linker flags, which is not supported by lld>=7 (previous versions just discareded unkonwn flags).
  
  Add an ecm module to check whether a linker flag is supported.
  
  Add cmake module to check for support of the flag. (See also the abandoned D17863 <https://phabricator.kde.org/D17863>).
  
  This should fix the build on FreeBSD CI.

TEST PLAN
  - Should be tested on Linux too.

REPOSITORY
  R321 KStars

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25501

AFFECTED FILES
  CMakeLists.txt
  cmake/modules/CheckNodump.cmake

To: tcberner, #freebsd, #kstars
Cc: kde-edu, narvaez, apol
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