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kernel: banner: use BUILD_VERSION only if not empty

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The `BUILD_VERSION` can be defined but empty when built
without git, causing version to be missing from the banner:

```
*** Booting Zephyr OS build  ***
Hello World! qemu_riscv64
```

Let's check if it is empty before using it, so that
`KERNEL_VERSION_STRING`, which is generated independently
with cmake can be used as a fallback:

```
*** Booting Zephyr OS build 3.5.0 ***
Hello World! qemu_riscv64
```

Signed-off-by: Yong Cong Sin <ycsin@meta.com>
This commit is contained in:
Yong Cong Sin 2024-04-02 14:48:02 +08:00 committed by Carles Cufí
parent 20b7b6e1d4
commit fbaf7dfdc1
1 changed files with 1 additions and 1 deletions
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2
kernel/banner.c
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@ -17,7 +17,7 @@
#endif /* defined(CONFIG_BOOT_DELAY) && (CONFIG_BOOT_DELAY > 0) */
#ifndef BANNER_VERSION
#ifdef BUILD_VERSION
#if defined(BUILD_VERSION) && !IS_EMPTY(BUILD_VERSION)
#define BANNER_VERSION STRINGIFY(BUILD_VERSION)
#else
#define BANNER_VERSION KERNEL_VERSION_STRING