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Diffstat (limited to 'docs/zephyr/zephyr_troubleshooting.md')
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1 files changed, 12 insertions, 2 deletions
diff --git a/docs/zephyr/zephyr_troubleshooting.md b/docs/zephyr/zephyr_troubleshooting.md index aa6980a9d5..3f3cc508cc 100644 --- a/docs/zephyr/zephyr_troubleshooting.md +++ b/docs/zephyr/zephyr_troubleshooting.md @@ -135,13 +135,23 @@ example a missing `struct device` can show as /tmp/ccCiGy7c.ltrans0.ltrans.o:(.rodata+0x6a0): undefined reference to `__device_dts_ord_75' ``` -Adding `CONFIG_LTO=n` to the corresponding `prj.conf` usually results in more -useful error messages, for example: +Adding `CONFIG_LTO=n` to the corresponding `prj.conf` or building with `zmake +build <project> -DCONFIG_LTO=n` usually results in more useful error messages, +for example: ``` modules/ec/libec_shim.a(adc.c.obj):(.rodata.adc_channels+0x58): undefined reference to `__device_dts_ord_75' ``` +## Macro Error Expansion + +GCC errors on macros include macro expansion by default. This usually results +in a wall of errors that makes it very hard to identify the actual problem. For +these situations it's useful to disable macro expansion entirely by setting +`CONFIG_COMPILER_TRACK_MACRO_EXPANSION=n`, for example by building with: + +`zmake build <project> -DCONFIG_COMPILER_TRACK_MACRO_EXPANSION=n` + ## Build artifacts The buildsystem can be configured to leave the build artifact next to the |