Add a RPi4 device spec

[ChangeLog][Platform Specific Changes][Linux] Added a device spec for
Raspberry Pi 4 (32-bit, V3D)

Change-Id: Idea889842a89dcc74705f1bb9559953dadc07251
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 40 insertions, 0 deletions

diff --git a/mkspecs/devices/linux-rasp-pi4-v3d-g++/qmake.conf b/mkspecs/devices/linux-rasp-pi4-v3d-g++/qmake.conf
new file mode 100644
index 0000000000..69b0c761a8
--- /dev/null
+++ b/mkspecs/devices/linux-rasp-pi4-v3d-g++/qmake.conf
@@ -0,0 +1,40 @@
+# qmake configuration for the Raspberry Pi 4 (32-bit) using the Mesa V3D
+# graphics stack. (not the Broadcom stack)
+#
+# This supports accelerated OpenGL both for X11 and DRM/KMS.  Perhaps
+# Wayland too.
+#
+# Tested with a sysroot created from Raspbian Buster and a gcc 7.4
+# toolchain from Linaro.
+#
+# Example configure command line, assuming installation to
+# /usr/local/qt5pi on device and ~/rpi/qt5 on the host:
+#
+# ./configure -release -opengl es2 -device linux-rasp-pi4-v3d-g++ -device-option CROSS_COMPILE=~/rpi/gcc-linaro-7.4.1-2019.02-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- \
+#   -sysroot ~/rpi/sysroot -opensource -confirm-license -make libs -prefix /usr/local/qt5pi -extprefix ~/rpi/qt5 -v
+#
+# Check the configure output carefully. EGLFS, EGLFS GBM, and EGL on X11
+# should all be 'yes'. Otherwise something is wrong.
+#
+# If getting linker errors like "undefined reference to `_dl_stack_flags'" check the
+# symlinks in the sysroot, they were probably not adjusted
+# correctly. F.ex. sysroot/usr/lib/arm-linux-gnueabihf/libpthread.so must point to
+# sysroot/lib/arm-linux-gnueabihf/libpthread.so.0. If it is a broken link instead, bad
+# things will happen.
+
+include(../common/linux_device_pre.conf)
+
+QMAKE_LIBS_EGL         += -lEGL
+QMAKE_LIBS_OPENGL_ES2  += -lGLESv2 -lEGL
+
+QMAKE_CFLAGS            = -march=armv8-a -mtune=cortex-a72 -mfpu=crypto-neon-fp-armv8
+QMAKE_CXXFLAGS          = $$QMAKE_CFLAGS
+
+DISTRO_OPTS            += hard-float
+DISTRO_OPTS            += deb-multi-arch
+
+EGLFS_DEVICE_INTEGRATION = eglfs_kms
+
+include(../common/linux_arm_device_post.conf)
+
+load(qt_config)