7361a155ef
When building a firmware for the MACCHIATObin with edk2 and
arm-trusted-firmware, the build can randomly fail with the
following make error:
make[1]: Circular output/build/edk2-edk2-stable202411/.stamp_configured <- arm-trusted-firmware dependency dropped.
The message appears also when the build is not failing, depending on
the number of parallel jobs and the build order.
The issue can be observed with the following commands:
cat >.config <<EOF
BR2_aarch64=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="a80x0_mcbin"
BR2_TARGET_ARM_TRUSTED_FIRMWARE_EDK2_AS_BL33=y
BR2_TARGET_BINARIES_MARVELL=y
BR2_TARGET_EDK2=y
BR2_TARGET_EDK2_PLATFORM_SOLIDRUN_ARMADA80X0MCBIN=y
BR2_TARGET_MV_DDR_MARVELL=y
EOF
make olddefconfig
utils/brmake
grep -FC5 'dependency dropped' br.log
The circular dependency happen due to [1] and [2].
In fact, only TF-A depends on EDK II (passed as BL33) for building and
not vice versa. See [3]. The EDK II "SolidRun MacchiatoBin" platform
build does not need any TF-A image, compared to some other platforms
such as "Socionext DeveloperBox" or "QEMU SBSA" which are referencing
TF-A images in a hook added in EDK2_PRE_BUILD_HOOKS.
Drop the false dependency on TF-A to fix the build.
This issue has been present since the EDK2 introduction in commit [4].
[1] https://gitlab.com/buildroot.org/buildroot/-/blob/2025.02/boot/arm-trusted-firmware/arm-trusted-firmware.mk#L121
[2] https://gitlab.com/buildroot.org/buildroot/-/blob/2025.02/boot/edk2/edk2.mk#L118
[3] https://github.com/Semihalf/edk2-platforms/wiki/Build_firmware
[4] 1074a37e78
Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>
Cc: Dick Olsson <hi@senzilla.io>
[Julien: add extra info in commit log]
Signed-off-by: Julien Olivain <ju.o@free.fr>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches