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[CMAKE] Avoid duplicating the compiler/linker flags

Authored by Fabien on Aug 8 2019, 14:42.



This will allow for adding the flags both at top level and in the
submodules (e.g. secp256k1) whithout duplicating them on the command
line, thus allowing these submodules to build standalone.

Note: duplicating the flag is not very expensive as the check result is
already in cache.

Depends on D3825.

Test Plan

Duplicate a compiler and/or linker flag and run ninja -v.
Check in the output that the flag is not duplicated on the command line.

Diff Detail

rABC Bitcoin ABC
Automatic diff as part of commit; lint not applicable.
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

Fabien created this revision.Aug 8 2019, 14:42
Herald added a reviewer: Restricted Project. · View Herald TranscriptAug 8 2019, 14:42
jasonbcox accepted this revision.Aug 8 2019, 19:34
This revision is now accepted and ready to land.Aug 8 2019, 19:34
This revision was automatically updated to reflect the committed changes.