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| author | Mårten Nordheim <marten.nordheim@qt.io> | 2019-07-05 10:47:26 +0200 |
|---|---|---|
| committer | Alexandru Croitor <alexandru.croitor@qt.io> | 2019-09-11 08:25:54 +0000 |
| commit | 2cf0ba1fba9293b3265a186527dbc90d395dfd20 (patch) | |
| tree | 4a25d77ccd7e201e01bfcbcf086370869c53cce4 /CMakeLists.txt | |
| parent | 7df0868ad59dd071f2ce2dd355488128fa56f645 (diff) | |
Use pre-compiled headers when building Qt with cmake
Some modules define their own manually-maintained lists, and we can rely
on the headers generated by each module to include in the pch as well
e.g. QtCore/QtCore.
There's also e.g. QtWidgetDepends for QtWidgets, but this only
works for modules, not for tools, examples or other applications.
For now we'll use the Qt<Module>/Qt<Module> headers for the
modules we depend on.
Building with PCH can be disabled with -DBUILD_WITH_PCH=NO, and it only
works for versions of CMake newer than 3.15.20190829.
Change-Id: Iae52bd69acfdfd58f4cd20d3cfa3c7f42775f732
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index a45098efbf..a52bed4658 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -41,6 +41,9 @@ set(QT_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS}) ## Should this Qt be built with Werror? option(WARNINGS_ARE_ERRORS "Build Qt with warnings as errors" ${FEATURE_developer_build}) +## Should Qt be built using PCH? +option(BUILD_WITH_PCH "Build Qt using precompiled headers?" ON) + ## Decide whether tools will be built. qt_check_if_tools_will_be_built() |