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build-system: fail with Qt6

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I thought that explicitly requesting Qt5 should be enough, but we have a report
from a user who tried to build against Qt6 and cmake happily let them proceed.
So let's fail this explicitly.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2021-07-28 07:44:56 -07:00
parent 42eb39fc4a
commit 383f326136
1 changed files with 7 additions and 0 deletions
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7
CMakeLists.txt
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@ -299,6 +299,13 @@ elseif (SUBSURFACE_TARGET_EXECUTABLE MATCHES "DownloaderExecutable")
find_package(Qt5 5.11 REQUIRED COMPONENTS ${QT_FIND_COMPONENTS})
set(MAKE_TESTS OFF)
endif()
# we don't support Qt6
# the comparison with an invalid version of 5.15 ensures that this will keep working even if
# there are newer Qt 5.15 versions over time (which is unfortunately doubtful)
if (Qt5Core_VERSION VERSION_GREATER 5.15.15)
message(FATAL_ERROR "Subsurface cannot be built against Qt 6 or later")
endif()
foreach(_QT_COMPONENT ${QT_FIND_COMPONENTS})
list(APPEND QT_LIBRARIES Qt5::${_QT_COMPONENT})
endforeach()