Issue #668 has been reported by Keith Hui.
----------------------------------------
Bug #668: mb/asus/p8x7x-series abuild broken
https://ticket.coreboot.org/issues/668
* Author: Keith Hui
* Status: New
* Priority: Normal
* Assignee: Matt DeVillier
* Category: coreboot common code
* Target version: none
* Start date: 2026-10-21
* Affected versions: main
----------------------------------------
abuild for this family of boards breaks if `CONFIG_BOOTBLOCK_CONSOLE` is
disabled.
The error is:
```
/usr/src/coreboot/util/crossgcc/xgcc/bin/i386-elf-ld.bfd:
coreboot-builds/ASUS_P8Z77_V_LE_PLUS/bootblock/superio/nuvoton/common/early_serial.o:
in function `nuvoton_enable_serial':
/usr/src/coreboot/src/superio/nuvoton/common/early_serial.c:17:(.text.nuvoton_enable_serial+0xf):
undefined reference to `console_serial_enabled'
```
It looks like a link time error, because console/serial_console.c is not being
compiled into bootblock in this case. This unit is a new addition of commit
605cba2fd137 ("console: allow enabling serial console at runtime").
To reproduce, from root of coreboot source tree:
1. Create a text file `nobootconsole` with this content:
```
CONFIG_BOOTBLOCK_CONSOLE=n
```
2. Run `util/abuild/abuild -p none -c 8 -t asus/p8x7x-series -S -K
nobootconsole`
This error isn't immediately obvious because CONFIG_BOOTBLOCK_CONSOLE defaults
to enabled (for good reasons), but it is a user Kconfig option so none can
guarantee it's always enabled.
Whether CONFIG_SEPARATE_ROMSTAGE is chosen or not does not seem to matter.
Build still fails.
I should check with Matt before I start working around this by deferring
nuvoton_enable_serial() to romstage at mainboard level, as my workaround plan
can be tricky as I need to find a romstage hook before console init to make
this call in.
Ideally, if a board has serial console support and bootblock console is
disabled, no serial and console init should happen in bootblock and should
instead happen early in romstage.
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