From 2895f3ffaa632f129232f70564a16f202ead0bda Mon Sep 17 00:00:00 2001
From: Simon Hausmann <simon.hausmann@qt.io>
Date: Fri, 21 Jun 2019 14:58:52 +0200
Subject: Generate a toolchain and convenience cmake wrapper

This gets us a step into the direction of convenience that qmake
offered:

    * QtBase is configured with a long command line (especially when
      cross-compiling)
    * Afterwards application developers (or other module builds) can
      just use qmake && make

By generating a toolchain file we can capture vcpkg and toolchain
chain-loading and a shell script can take care of providing the prefix
path.

Change-Id: Ided81f5432cab862306f2bea86cfe8e56adf71b0
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
---
 cmake/QtBaseGlobalTargets.cmake | 28 ++++++++++++++++++++++++++++
 cmake/qt.toolchain.cmake.in     | 18 ++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 cmake/qt.toolchain.cmake.in

(limited to 'cmake')

diff --git a/cmake/QtBaseGlobalTargets.cmake b/cmake/QtBaseGlobalTargets.cmake
index 5bb0925f5b..34f2cfe635 100644
--- a/cmake/QtBaseGlobalTargets.cmake
+++ b/cmake/QtBaseGlobalTargets.cmake
@@ -60,6 +60,34 @@ qt_install(FILES
     COMPONENT Devel
 )
 
+# Generate toolchain file for convenience
+if(QT_HOST_PATH)
+    get_filename_component(init_qt_host_path "${QT_HOST_PATH}" ABSOLUTE)
+    set(init_qt_host_path "set(QT_HOST_PATH \"${init_qt_host_path}\" CACHE PATH \"\" FORCE)")
+endif()
+
+if(CMAKE_TOOLCHAIN_FILE)
+    set(init_original_toolchain_file "set(qt_chainload_toolchain_file \"${CMAKE_TOOLCHAIN_FILE}\")")
+endif()
+
+if(VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
+    list(APPEND init_vcpkg "set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE \"${VCPKG_CHAINLOAD_TOOLCHAIN_FILE}\")")
+endif()
+
+if(VCPKG_TARGET_TRIPLET)
+    list(APPEND init_vcpkg "set(VCPKG_TARGET_TRIPLET \"${VCPKG_TARGET_TRIPLET}\")")
+endif()
+
+string(REPLACE ";" "\n" init_vcpkg "${init_vcpkg}")
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/cmake/qt.toolchain.cmake.in" "${__GlobalConfig_build_dir}/qt.toolchain.cmake" @ONLY)
+qt_install(FILES "${__GlobalConfig_build_dir}/qt.toolchain.cmake" DESTINATION "${__GlobalConfig_install_dir}" COMPONENT Devel)
+
+# Also provide a convenience cmake wrapper
+if(UNIX)
+    configure_file("${CMAKE_CURRENT_SOURCE_DIR}/bin/qt-cmake.in" "${QT_BUILD_DIR}/${INSTALL_BINDIR}/qt-cmake" @ONLY)
+    qt_install(PROGRAMS "${QT_BUILD_DIR}/bin/qt-cmake" DESTINATION "${INSTALL_BINDIR}")
+endif()
+
 ## Library to hold global features:
 ## These features are stored and accessed via Qt::GlobalConfig, but the
 ## files always lived in Qt::Core, so we keep it that way
diff --git a/cmake/qt.toolchain.cmake.in b/cmake/qt.toolchain.cmake.in
new file mode 100644
index 0000000000..d816e1dcc9
--- /dev/null
+++ b/cmake/qt.toolchain.cmake.in
@@ -0,0 +1,18 @@
+list(APPEND CMAKE_PREFIX_PATH "@CMAKE_INSTALL_PREFIX@")
+list(APPEND CMAKE_FIND_ROOT_PATH "@CMAKE_INSTALL_PREFIX@")
+
+@init_qt_host_path@
+
+@init_original_toolchain_file@
+
+@init_vcpkg@
+
+if(qt_chainload_toolchain_file)
+    include("${qt_chainload_toolchain_file}")
+    unset(qt_chainload_toolchain_file)
+endif()
+
+if(QT_HOST_PATH)
+    list(APPEND CMAKE_PREFIX_PATH "${QT_HOST_PATH}")
+    list(APPEND CMAKE_FIND_ROOT_PATH "${QT_HOST_PATH}")
+endif()
-- 
cgit v1.2.3