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CMake: Don't cache QT_SYNCQT across builds

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There is no need for this variable to be stored in CMake's cache.  We
don't perform expensive operations to set up QT_SYNCQT, and we even
unset the cache variable to ensure it gets recomputed on
reconfiguration.

We still store QT_SYNCQT in a global property, because the function
qt_ensure_sync_qt is called in different directory scopes, and we want
to avoid re-calculations for every subdir.

It's now possible for the user to set QT_SYNCQT (see QTBUG-88088 for
motivation).  Also, in a non-prefix build, changes to syncqt.pl in the
source dir are reflected upon re-configuration in the build
tree (because qt_copy_or_install is called on every configure).

Pick-to: 6.2
Fixes: QTBUG-88088
Task-number: QTBUG-75290
Change-Id: I6137b060d200d3dafd4a64d5a6c1bd2549723d78
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Joerg Bornemann 2021-08-27 14:47:45 +02:00
parent 4d8fb1bc6f
commit 60f36007a3
2 changed files with 13 additions and 10 deletions
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4
cmake/QtBuild.cmake
View File

@ -401,10 +401,6 @@ qt_internal_set_qt_known_plugins("")
set(QT_KNOWN_MODULES_WITH_TOOLS "" CACHE INTERNAL "Known Qt modules with tools" FORCE)
# Reset syncqt cache variable, to make sure it gets recomputed on reconfiguration, otherwise
# it might not get installed.
unset(QT_SYNCQT CACHE)
# For adjusting variables when running tests, we need to know what
# the correct variable is for separating entries in PATH-alike
# variables.

19
cmake/QtSyncQtHelpers.cmake
View File

@ -14,11 +14,17 @@ function(qt_ensure_sync_qt)
return()
endif()
get_property(QT_SYNCQT GLOBAL PROPERTY _qt_syncqt)
if(NOT "${QT_SYNCQT}" STREQUAL "")
set(QT_SYNCQT "${QT_SYNCQT}" PARENT_SCOPE)
return()
endif()
# When building qtbase, use the source syncqt, otherwise use the installed one.
set(SYNCQT_FROM_SOURCE "${QtBase_SOURCE_DIR}/libexec/syncqt.pl")
if(NOT ("${QtBase_SOURCE_DIR}" STREQUAL "") AND EXISTS "${SYNCQT_FROM_SOURCE}")
set(QT_SYNCQT "${SYNCQT_FROM_SOURCE}" CACHE FILEPATH "syncqt script")
message(STATUS "Using source syncqt found at: ${QT_SYNCQT}")
set(syncqt_absolute_path "${SYNCQT_FROM_SOURCE}")
message(STATUS "Using source syncqt found at: ${syncqt_absolute_path}")
qt_path_join(syncqt_install_dir ${QT_INSTALL_DIR} ${INSTALL_LIBEXECDIR})
qt_copy_or_install(PROGRAMS "${SYNCQT_FROM_SOURCE}"
@ -27,15 +33,16 @@ function(qt_ensure_sync_qt)
get_filename_component(syncqt_absolute_path
"${QT_HOST_PATH}/${QT${PROJECT_VERSION_MAJOR}_HOST_INFO_LIBEXECDIR}/syncqt.pl"
ABSOLUTE)
set(QT_SYNCQT "${syncqt_absolute_path}" CACHE FILEPATH "syncqt script")
message(STATUS "Using host syncqt found at: ${QT_SYNCQT}")
message(STATUS "Using host syncqt found at: ${syncqt_absolute_path}")
else()
get_filename_component(syncqt_absolute_path
"${QT_BUILD_INTERNALS_RELOCATABLE_INSTALL_PREFIX}/${INSTALL_LIBEXECDIR}/syncqt.pl"
ABSOLUTE)
set(QT_SYNCQT "${syncqt_absolute_path}" CACHE FILEPATH "syncqt script")
message(STATUS "Using installed syncqt found at: ${QT_SYNCQT}")
message(STATUS "Using installed syncqt found at: ${syncqt_absolute_path}")
endif()
set(QT_SYNCQT "${syncqt_absolute_path}" PARENT_SCOPE)
set_property(GLOBAL PROPERTY _qt_syncqt "${syncqt_absolute_path}")
endfunction()
function(qt_install_injections target build_dir install_dir)