[Buildroot] [PATCH 2/6] package/mesa3d: precomp-compiler does not need target llvm

[Bernd Kuhls]

Inspired by and fixes
https://gitlab.com/buildroot.org/buildroot/-/work_items/180

To build binaries provided by the host-mesa3d package we do not need to
build llvm packages for the target arch.

Signed-off-by: Bernd Kuhls <bernd at kuhls.net>
---
 package/mesa3d/Config.in | 46 +++++++++++++++++++++++-----------------
 package/mesa3d/mesa3d.mk |  8 ++++++-
 2 files changed, 33 insertions(+), 21 deletions(-)

diff --git a/package/mesa3d/Config.in b/package/mesa3d/Config.in
index cb86e6a2a4..feed6b68fe 100644
--- a/package/mesa3d/Config.in
+++ b/package/mesa3d/Config.in
@@ -23,8 +23,7 @@ config BR2_PACKAGE_MESA3D_NEEDS_ELFUTILS
 
 config BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	bool
-	select BR2_PACKAGE_SPIRV_LLVM_TRANSLATOR
-	select BR2_PACKAGE_SPIRV_TOOLS
+	select BR2_HOST_CMAKE_AT_LEAST_3_20 # host-llvm
 
 config BR2_PACKAGE_MESA3D_LLVM
 	bool "llvm support"
@@ -147,15 +146,17 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_I915
 
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_IRIS
 	bool "Gallium iris driver"
-	depends on BR2_PACKAGE_MESA3D_LLVM
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS # host-llvm
+	depends on BR2_HOST_GCC_AT_LEAST_7 # host-llvm
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_RUSTICL_SUPPORTED_DRIVER
 	help
 	  Mesa driver for iris-based Intel GPUs.
 
-comment "iris driver needs llvm"
-	depends on !BR2_PACKAGE_MESA3D_LLVM
+comment "iris driver needs host gcc >= 7"
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
+	depends on !BR2_HOST_GCC_AT_LEAST_7
 
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_LIMA
 	bool "Gallium lima driver"
@@ -189,15 +190,17 @@ config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_NOUVEAU
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_PANFROST
 	bool "Gallium panfrost driver"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
-	depends on BR2_PACKAGE_MESA3D_LLVM
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS # host-llvm
+	depends on BR2_HOST_GCC_AT_LEAST_7 # host-llvm
 	select BR2_PACKAGE_MESA3D_GALLIUM_DRIVER
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_RUSTICL_SUPPORTED_DRIVER
 	help
 	  Mesa driver for ARM Mali Midgard and Bifrost GPUs.
 
-comment "panfrost driver needs llvm"
-	depends on !BR2_PACKAGE_MESA3D_LLVM
+comment "panfrost driver needs host gcc >= 7"
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
+	depends on !BR2_HOST_GCC_AT_LEAST_7
 
 config BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_R300
 	bool "Gallium Radeon R300 driver"
@@ -360,46 +363,49 @@ config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_IMAGINATION
 	bool "Vulkan imagination driver"
 	depends on BR2_arm || BR2_aarch64
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
-	depends on BR2_PACKAGE_MESA3D_LLVM
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS # host-llvm
+	depends on BR2_HOST_GCC_AT_LEAST_7 # host-llvm
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 	help
 	  Vulkan imagination driver.
 
-comment "imagination vulkan needs llvm"
-	depends on !BR2_PACKAGE_MESA3D_LLVM
+comment "imagination vulkan driver needs host gcc >= 7"
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
+	depends on !BR2_HOST_GCC_AT_LEAST_7
 
 config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_INTEL
 	bool "Vulkan Intel driver"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17 # memfd.h
 	depends on BR2_TOOLCHAIN_USES_GLIBC # ifunc, static_assert
-	depends on BR2_PACKAGE_MESA3D_LLVM
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS # host-llvm
+	depends on BR2_HOST_GCC_AT_LEAST_7 # host-llvm
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 	help
 	  Vulkan driver for Intel hardware from Ivy Bridge onward.
 
-comment "intel vulkan needs llvm"
-	depends on !BR2_PACKAGE_MESA3D_LLVM
-
-comment "intel vulkan needs a glibc toolchain w/ headers >= 3.17"
+comment "intel vulkan driver needs a glibc toolchain w/ headers >= 3.17, host gcc >= 7"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
 	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17 || \
-		!BR2_TOOLCHAIN_USES_GLIBC
+		!BR2_TOOLCHAIN_USES_GLIBC || !BR2_HOST_GCC_AT_LEAST_7
 
 config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_PANFROST
 	bool "Vulkan panfrost driver"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 || !BR2_PACKAGE_XORG7 # libxshmfence
-	depends on BR2_PACKAGE_MESA3D_LLVM
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS # host-llvm
+	depends on BR2_HOST_GCC_AT_LEAST_7 # host-llvm
 	select BR2_PACKAGE_LLVM_RTTI if BR2_PACKAGE_MESA3D_LLVM
 	select BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER
 	select BR2_PACKAGE_MESA3D_VULKAN_DRIVER
 	help
 	  Vulkan panfrost driver.
 
-comment "panfrost vulkan needs llvm"
-	depends on !BR2_PACKAGE_MESA3D_LLVM
+comment "panfrost vulkan driver needs host gcc >= 7"
+	depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
+	depends on !BR2_HOST_GCC_AT_LEAST_7
 
 config BR2_PACKAGE_MESA3D_VULKAN_DRIVER_SWRAST
 	bool "Vulkan swrast driver"
diff --git a/package/mesa3d/mesa3d.mk b/package/mesa3d/mesa3d.mk
index 8c78167685..779ea9f111 100644
--- a/package/mesa3d/mesa3d.mk
+++ b/package/mesa3d/mesa3d.mk
@@ -181,7 +181,7 @@ endif
 
 ifeq ($(BR2_PACKAGE_MESA3D_NEEDS_PRECOMP_COMPILER),y)
 MESA3D_CONF_OPTS += -Dmesa-clc=system -Dprecomp-compiler=system
-MESA3D_DEPENDENCIES += host-mesa3d spirv-llvm-translator spirv-tools
+MESA3D_DEPENDENCIES += host-mesa3d
 endif
 
 ifeq ($(BR2_PACKAGE_MESA3D_VULKAN_DRIVER),)
@@ -350,6 +350,12 @@ HOST_MESA3D_CONF_OPTS = \
 	-Dglx=disabled \
 	-Dvulkan-drivers=""
 
+ifeq ($(BR2_PACKAGE_LLVM_RTTI),y)
+HOST_MESA3D_CONF_OPTS += -Dcpp_rtti=true
+else
+HOST_MESA3D_CONF_OPTS += -Dcpp_rtti=false
+endif
+
 HOST_MESA3D_DEPENDENCIES = \
 	host-libclc \
 	host-libdrm \
-- 
2.47.3