=================================
Add a Buildroot 'device' to ease cross-compilation
Qt5 has a mechanism to support "device" profiles, so that people can
specify the compiler, compiler flags and so on for a specific device.
We leverage this mechanism in the Buildroot packaging of qt5 to
simplify cross-compilation: we have our own "device" definition, which
allows us to easily pass the cross-compiler paths and flags from our
qt5.mk.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
===================================================================
@@ -0,0 +1,61 @@
+MAKEFILE_GENERATOR = UNIX
+CONFIG += incremental gdb_dwarf_index
+QMAKE_INCREMENTAL_STYLE = sublib
+
+include(../../common/linux.conf)
+include(../../common/gcc-base-unix.conf)
+include(../../common/g++-unix.conf)
+
+load(device_config)
+
+QT_QPA_DEFAULT_PLATFORM = eglfs
+
+BUILDROOT_CROSS_COMPILE =
+BUILDROOT_COMPILER_CFLAGS =
+BUILDROOT_COMPILER_CXXFLAGS =
+BUILDROOT_INCLUDE_PATH =
+BUILDROOT_INCDIR_OPENGL_ES2 =
+BUILDROOT_LIBDIR_OPENGL_ES2 =
+BUILDROOT_LIBS_OPENGL_ES2 =
+BUILDROOT_INCDIR_EGL =
+BUILDROOT_LIBDIR_EGL =
+BUILDROOT_LIBS_EGL =
+BUILDROOT_INCDIR_OPENVG =
+BUILDROOT_LIBDIR_OPENVG =
+BUILDROOT_LIBS_OPENVG =
+
+# modifications to g++.conf
+QMAKE_CC = $${BUILDROOT_CROSS_COMPILE}gcc
+QMAKE_CXX = $${BUILDROOT_CROSS_COMPILE}g++
+QMAKE_LINK = $${QMAKE_CXX}
+QMAKE_LINK_SHLIB = $${QMAKE_CXX}
+
+# modifications to linux.conf
+QMAKE_AR = $${BUILDROOT_CROSS_COMPILE}ar cqs
+QMAKE_OBJCOPY = $${BUILDROOT_CROSS_COMPILE}objcopy
+QMAKE_STRIP = $${BUILDROOT_CROSS_COMPILE}strip
+
+#modifications to gcc-base.conf
+QMAKE_CFLAGS += $${BUILDROOT_COMPILER_CFLAGS}
+QMAKE_CXXFLAGS += $${BUILDROOT_COMPILER_CXXFLAGS}
+QMAKE_CXXFLAGS_RELEASE += -O3
+INCLUDEPATH += $${BUILDROOT_INCLUDE_PATH}
+
+QMAKE_LIBS += -lrt -lpthread -ldl
+QMAKE_INCDIR_OPENGL_ES2 = $${BUILDROOT_INCDIR_OPENGL_ES2}
+QMAKE_LIBDIR_OPENGL_ES2 = $${BUILDROOT_LIBDIR_OPENGL_ES2}
+QMAKE_LIBS_OPENGL_ES2 = $${BUILDROOT_LIBS_OPENGL_ES2}
+QMAKE_INCDIR_EGL = $${BUILDROOT_INCDIR_EGL}
+QMAKE_LIBDIR_EGL = $${BUILDROOT_LIBDIR_EGL}
+QMAKE_LIBS_EGL = $${BUILDROOT_LIBS_EGL}
+QMAKE_INCDIR_OPENVG = $${BUILDROOT_INCDIR_OPENVG}
+QMAKE_LIBDIR_OPENVG = $${BUILDROOT_LIBDIR_OPENVG}
+QMAKE_LIBS_OPENVG = $${BUILDROOT_LIBS_OPENVG}
+
+# device specific glue code
+EGLFS_PLATFORM_HOOKS_SOURCES =
+
+# Sanity check
+deviceSanityCheckCompiler()
+
+load(qt_config)
===================================================================
@@ -0,0 +1 @@
+#include "../../linux-g++/qplatformdefs.h"
Hi all again, With this email I inline the changes I made in package/qt5/qt5base directory files. I call them proposals at this moment, as I suspect they can be improved, by people who have more buildroot inside knowledge. The changes are a variation on the Raspberry-Pi modifications. Note that the platform hooks point to the Freescale LTIB device directory that can already be found in the qt5 source: mkspecs/devices/linux-imx6-g++/qeglshooks.cpp (Arnout, both -mfloat-abi=softfp -mfpu=neon are needed for the floating point, the first seems to indicate the way parameters are transferred, the second indicates the FPU) kindly requesting for comments, Henk File qt5base-mkspecs-files.patch becomes: ================================= and the file qt5base.mk is then ================================= ############################################################# # # qt5base # ############################################################# QT5BASE_VERSION = $(QT5_VERSION) QT5BASE_SITE = http://releases.qt-project.org/qt5/$(QT5BASE_VERSION)/submodules_tar/ QT5BASE_SOURCE = qtbase-opensource-src-$(QT5BASE_VERSION).tar.xz QT5BASE_DEPENDENCIES = host-pkgconf zlib pcre QT5BASE_INSTALL_STAGING = YES # A few comments: # * -no-pch to workaround the issue described at # http://comments.gmane.org/gmane.comp.lib.qt.devel/5933. # * -system-zlib because zlib is mandatory for Qt build, and we # want to use the Buildroot packaged zlib # * -system-pcre because pcre is mandatory to build Qt, and we # want to use the one packaged in Buildroot QT5BASE_CONFIGURE_OPTS += \ -optimized-qmake \ -no-kms \ -no-cups \ -no-nis \ -no-libudev \ -no-iconv \ -no-gstreamer \ -no-gtkstyle \ -system-zlib \ -system-pcre \ -no-pch ifeq ($(BR2_ENABLE_DEBUG),y) QT5BASE_CONFIGURE_OPTS += -debug else QT5BASE_CONFIGURE_OPTS += -release endif ifeq ($(BR2_PREFER_STATIC_LIB),y) QT5BASE_CONFIGURE_OPTS += -static else # We apparently can't build both the shared and static variants of the # library. QT5BASE_CONFIGURE_OPTS += -shared endif ifeq ($(BR2_LARGEFILE),y) QT5BASE_CONFIGURE_OPTS += -largefile else QT5BASE_CONFIGURE_OPTS += -no-largefile endif ifeq ($(BR2_PACKAGE_QT5BASE_LICENSE_APPROVED),y) QT5BASE_CONFIGURE_OPTS += -opensource -confirm-license QT5BASE_LICENSE = LGPLv2.1 or GPLv3.0 QT5BASE_LICENSE_FILES = LICENSE.GPL LICENSE.LGPL LGPL_EXCEPTION.txt else QT5BASE_LICENSE = Commercial license QT5BASE_REDISTRIBUTE = NO endif # We have to use --enable-linuxfb, otherwise Qt thinks that -linuxfb # is to add a link against the "inuxfb" library. QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_GUI),-gui,-no-gui) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_WIDGETS),-widgets,-no-widgets) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_LINUXFB),--enable-linuxfb,-no-linuxfb) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_DIRECTFB),-directfb,-no-directfb) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_QT5BASE_DIRECTFB),directfb) ifeq ($(BR2_PACKAGE_QT5BASE_XCB),y) QT5BASE_CONFIGURE_OPTS += -xcb QT5BASE_DEPENDENCIES += \ libxcb \ xcb-util-wm \ xcb-util-image \ xcb-util-keysyms \ xlib_libX11 else QT5BASE_CONFIGURE_OPTS += -no-xcb endif QT5BASE_ADDITIONAL_INCLUDE_PATHS = $(STAGING_DIR)/usr/include ifeq ($(BR2_PACKAGE_QT5BASE_EGLFS),y) QT5BASE_CONFIGURE_OPTS += -opengl es2 -eglfs QT5BASE_DEPENDENCIES += libgles libegl QT5BASE_INCDIR_OPENGL_ES2 = QT5BASE_LIBDIR_OPENGL_ES2 = QT5BASE_LIBS_OPENGL_ES2 = QT5BASE_INCDIR_EGL = QT5BASE_LIBDIR_EGL = QT5BASE_LIBS_EGL = QT5BASE_INCDIR_OPENVG = QT5BASE_LIBDIR_OPENVG = QT5BASE_LIBS_OPENVG = ifeq ($(BR2_PACKAGE_RPI_USERLAND),y) QT5BASE_EGLFS_PLATFORM_HOOKS_SOURCES = \ $(@D)/mkspecs/devices/linux-rasp-pi-g++/qeglfshooks_pi.cpp endif ifeq ($(BR2_PACKAGE_GPU_VIV_BIN_IMX6Q),y) QT5BASE_EGLFS_PLATFORM_HOOKS_SOURCES = \ $(@D)/mkspecs/devices/linux-imx6-g++/qeglfshooks_imx6.cpp TARGET_CFLAGS += -mfloat-abi=softfp -mfpu=neon -DLINUX=1 -DEGL_API_FB=1 # TARGET_CXXFLAGS += -mfloat-abi=softfp -mfpu=neon -DLINUX=1 -DEGL_API_FB=1 # need to add the library paths here too QT5BASE_INCDIR_OPENGL_ES2 += $(STAGING_DIR)/usr/include QT5BASE_LIBDIR_OPENGL_ES2 += $(STAGING_DIR)/usr/lib QT5BASE_LIBS_OPENGL_ES2 += -lGLESv2 -lEGL-fb -lGAL-fb QT5BASE_INCDIR_EGL += $(STAGING_DIR)/usr/include QT5BASE_LIBDIR_EGL += $(STAGING_DIR)/usr/lib QT5BASE_LIBS_EGL += -lEGL-fb QT5BASE_INCDIR_OPENVG += $(STAGING_DIR)/usr/include QT5BASE_LIBDIR_OPENVG += $(STAGING_DIR)/usr/lib QT5BASE_LIBS_OPENVG += -lOpenVG -lEGL-fb -lGAL-fb # QT5BASE_ADDITIONAL_INCLUDE_PATHS += $(STAGING_DIR)/usr/include/directfb endif else QT5BASE_CONFIGURE_OPTS += -no-opengl -no-eglfs endif QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_OPENSSL),-openssl,-no-openssl) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_OPENSSL),openssl) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_FONTCONFIG),-fontconfig,-no-fontconfig) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_QT5BASE_FONTCONFIG),fontconfig) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_GIF),,-no-gif) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_JPEG),-system-libjpeg,-no-libjpeg) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_QT5BASE_JPEG),jpeg) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_PNG),-system-libpng,-no-libpng) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_QT5BASE_PNG),libpng) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_DBUS),-dbus,-no-dbus) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_QT5BASE_DBUS),dbus) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_LIBGLIB2),-glib,-no-glib) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_LIBGLIB2),libglib2) QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_ICU),-icu,-no-icu) QT5BASE_DEPENDENCIES += $(if $(BR2_PACKAGE_QT5BASE_ICU),icu) # Build the list of libraries to be installed on the target QT5BASE_INSTALL_LIBS_y += Qt5Core QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_NETWORK) += Qt5Network QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_CONCURRENT) += Qt5Concurrent QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_SQL) += Qt5Sql QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_TEST) += Qt5Test QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_XML) += Qt5Xml QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_GUI) += Qt5Gui QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_WIDGETS) += Qt5Widgets QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_PRINTSUPPORT) += Qt5PrintSupport QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_DBUS) += Qt5DBus # Ideally, we could use -device-option to substitute variable values # in our linux-buildroot-g++/qmake.config, but this mechanism doesn't # nicely support variable values that contain spaces. So we use the # good old sed solution here. define QT5BASE_CONFIG_SET $(SED) 's%^$(1).*%$(1) = $(2)%g' $(@D)/mkspecs/devices/linux-buildroot-g++/qmake.conf endef define QT5BASE_CONFIGURE_CMDS $(call QT5BASE_CONFIG_SET,BUILDROOT_CROSS_COMPILE,$(TARGET_CROSS)) $(call QT5BASE_CONFIG_SET,BUILDROOT_COMPILER_CFLAGS,$(TARGET_CFLAGS)) $(call QT5BASE_CONFIG_SET,BUILDROOT_COMPILER_CXXFLAGS,$(TARGET_CXXFLAGS)) $(call QT5BASE_CONFIG_SET,BUILDROOT_INCLUDE_PATH,$(QT5BASE_ADDITIONAL_INCLUDE_PATHS)) $(call QT5BASE_CONFIG_SET,BUILDROOT_INCDIR_OPENGL_ES2,$(QT5BASE_INCDIR_OPENGL_ES2)) $(call QT5BASE_CONFIG_SET,BUILDROOT_LIBDIR_OPENGL_ES2,$(QT5BASE_LIBDIR_OPENGL_ES2)) $(call QT5BASE_CONFIG_SET,BUILDROOT_LIBS_OPENGL_ES2,$(QT5BASE_LIBS_OPENGL_ES2)) $(call QT5BASE_CONFIG_SET,BUILDROOT_INCDIR_EGL,$(QT5BASE_INCDIR_EGL)) $(call QT5BASE_CONFIG_SET,BUILDROOT_LIBDIR_EGL,$(QT5BASE_LIBDIR_EGL)) $(call QT5BASE_CONFIG_SET,BUILDROOT_LIBS_EGL,$(QT5BASE_LIBS_EGL)) $(call QT5BASE_CONFIG_SET,BUILDROOT_INCDIR_OPENVG,$(QT5BASE_INCDIR_OPENVG)) $(call QT5BASE_CONFIG_SET,BUILDROOT_LIBDIR_OPENVG,$(QT5BASE_LIBDIR_OPENVG)) $(call QT5BASE_CONFIG_SET,BUILDROOT_LIBS_OPENVG,$(QT5BASE_LIBS_OPENVG)) $(call QT5BASE_CONFIG_SET,EGLFS_PLATFORM_HOOKS_SOURCES, \ $(QT5BASE_EGLFS_PLATFORM_HOOKS_SOURCES)) (cd $(@D); \ PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \ PKG_CONFIG_LIBDIR="$(STAGING_DIR)/usr/lib/pkgconfig" \ PKG_CONFIG_SYSROOT_DIR="$(STAGING_DIR)" \ MAKEFLAGS="$(MAKEFLAGS) -j$(PARALLEL_JOBS)" \ ./configure \ -v \ -prefix /usr \ -hostprefix $(HOST_DIR)/usr \ -sysroot $(STAGING_DIR) \ -plugindir /usr/lib/qt/plugins \ -no-rpath \ -nomake examples -nomake demos -nomake tests \ -device buildroot \ -no-c++11 \ $(QT5BASE_CONFIGURE_OPTS) \ ) endef define QT5BASE_BUILD_CMDS $(MAKE) -C $(@D) endef define QT5BASE_INSTALL_STAGING_CMDS $(MAKE) -C $(@D) install $(QT5_LA_PRL_FILES_FIXUP) endef define QT5BASE_INSTALL_TARGET_LIBS for lib in $(QT5BASE_INSTALL_LIBS_y); do \ cp -dpf $(STAGING_DIR)/usr/lib/lib$${lib}.so.* $(TARGET_DIR)/usr/lib ; \ done endef define QT5BASE_INSTALL_TARGET_PLUGINS if [ -d $(STAGING_DIR)/usr/lib/qt/plugins/ ] ; then \ mkdir -p $(TARGET_DIR)/usr/lib/qt/plugins ; \ cp -dpfr $(STAGING_DIR)/usr/lib/qt/plugins/* $(TARGET_DIR)/usr/lib/qt/plugins ; \ fi endef define QT5BASE_INSTALL_TARGET_FONTS if [ -d $(STAGING_DIR)/usr/lib/fonts/ ] ; then \ mkdir -p $(TARGET_DIR)/usr/lib/fonts ; \ cp -dpfr $(STAGING_DIR)/usr/lib/fonts/* $(TARGET_DIR)/usr/lib/fonts ; \ fi endef ifeq ($(BR2_PREFER_STATIC_LIB),y) define QT5BASE_INSTALL_TARGET_CMDS $(QT5BASE_INSTALL_TARGET_FONTS) endef else define QT5BASE_INSTALL_TARGET_CMDS $(QT5BASE_INSTALL_TARGET_LIBS) $(QT5BASE_INSTALL_TARGET_PLUGINS) $(QT5BASE_INSTALL_TARGET_FONTS) endef endif $(eval $(generic-package)) =================================