On Mon, Jan 16, 2017 at 09:47:06AM +0000, André Przywara wrote:
On 16/01/17 08:55, Maxime Ripard wrote:
On Fri, Jan 13, 2017 at 09:42:28AM +0000, Andre Przywara wrote:
Re wanting to build SPL either as 32-bit or 64-bit, could this be a Kconfig option perhaps?
Sounds like a direction worth to investigate. In the moment we have two separate defconfig files, because CPU_V7 and ARM64 are actually mutually exclusive, which is really a pain and the main reason that part wasn't merged.
I really like that option.
So I gave this a try this weekend, I have something like:
+choice
- prompt "32/64 bit build selection"
- depends on MACH_SUN50I
+config SUNXI_64BIT_BUILD
- bool "64-bit Aarch64 build"
- select ARM64
+config SUNXI_32BIT_BUILD
- bool "32-bit ARM build"
- select CPU_V7
- select PHYS_64BIT
+endchoice
I then set CONFIG_SUNXI_64BIT_BUILD=y in the defconfig. That seems to work, however switching to a 32-bit build requires either a) a separate defconfig - which is what we didn't want b) manually toggling this via menuconfig c) sed-ing these two lines in .config
I was hoping that there was some simple command line way of toggling a Kconfig option, à la: $ make pine64_plus_defconfig CONFIG_SUNXI_32BIT_BUILD=y
But that didn't work. mergeconfig.sh wasn't helpful as well.
Any ideas on how we could easily switch between the two options?
I know that Linux has a way to append defconfig fragments (originally for android options iirc). That could be worth a look.
Maxime