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kernel: Guard SYS_CLOCK_HW_CYCLES_PER_SEC to avoid spurious empty macro

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If SYS_CLOCK_EXISTS is not enabled, then the SYS_CLOCK_HW_CYCLES_PER_SEC
still gets created, but with no value. This causes the code generation
in misc/generated/CMakeLists.txt to create an empty assembly macro:

`.equ  CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC,`

which then causes a build error.

Disable SYS_CLOCK_HW_CYCLES_PER_SEC entirely when SYS_CLOCK_EXISTS is
disabled to fix this.

This is a follow-up to 03f46db859.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
This commit is contained in:
Carles Cufi 2025-06-06 10:53:21 +02:00 • committed by Fabio Baltieri
commit 61cdcb3383
1 changed files with 1 additions and 0 deletions
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kernel/Kconfig
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@ -844,6 +844,7 @@ config SYS_CLOCK_TICKS_PER_SEC
config SYS_CLOCK_HW_CYCLES_PER_SEC config SYS_CLOCK_HW_CYCLES_PER_SEC
int "System clock's h/w timer frequency" int "System clock's h/w timer frequency"
default 0 if TIMER_READS_ITS_FREQUENCY_AT_RUNTIME default 0 if TIMER_READS_ITS_FREQUENCY_AT_RUNTIME
depends on SYS_CLOCK_EXISTS
help help
This option specifies the frequency of the hardware timer used for the This option specifies the frequency of the hardware timer used for the
system clock (in Hz). This option is set by the SOC's or board's Kconfig file system clock (in Hz). This option is set by the SOC's or board's Kconfig file