Thomas Petazzoni
e1d159c5d5
The build of the following basic configuration enabling the
imagination Vulkan driver
BR2_aarch64=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
BR2_PACKAGE_MESA3D=y
BR2_PACKAGE_MESA3D_VULKAN_DRIVER_IMAGINATION=y
fails with:
meson.build:847:3: ERROR: Feature llvm cannot be disabled: CLC requires LLVM
Adding just LLVM as a dependency is not enough, as then libclc is
needed, then LLVMSPIRVLib, then clangBasic, then the pco_clc tool.
In fact, like the Panfrost driver, building the Imagination driver
requires building host tools using host-mesa3d. To fix this we:
- Make the BR2_PACKAGE_MESA3D_OPENCL option selectable
- Make sure that BR2_PACKAGE_MESA3D_VULKAN_DRIVER_IMAGINATION depends
on BR2_PACKAGE_MESA3D_LLVM and select
BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER (the latter being needed to
build host-mesa3d)
- Make sure the host-mesa3d builds imagination
tools (-Dtools=imagination) and install
pco_clc (HOST_MESA3D_INSTALL_PCO_CLC). This requires introducing
HOST_MESA3D_TOOLS as a list of tools to build, which then gets used
to construct the -Dtools argument, as we can now have both
"panfrost" and "imagination" in this list.
With all this, the defconfig above builds successfully.
This has been broken since Buildroot commit
5e818c16a3, which introduced the vulkan
driver support.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
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