Building on scarthgap I'm seeing a problem using meson.
meson snippet:
```
lvgl_opt_var = cmake.subproject_options()
lvgl_c_flags = '-DEGL_NO_X11 -DLV_CONF_PATH=' + meson.current_source_dir()
+ '/lv_conf.h'
lvgl_cxx_flags = '-DEGL_NO_X11 -DLV_CONF_PATH=' +
meson.current_source_dir() + '/lv_conf.h'
lvgl_opt_var.add_cmake_defines(
{
'CMAKE_VERBOSE_MAKEFILE' : true,
'CMAKE_C_FLAGS' : lvgl_c_flags,
'CMAKE_CXX_FLAGS' : lvgl_cxx_flags })
```
Build Error:
```
| In file included from ../git/subprojects/lvgl/src/core/lv_group.h:16,
| from
../git/subprojects/lvgl/src/core/lv_group_private.h:17,
| from ../git/subprojects/lvgl/src/core/lv_group.c:9:
| ../git/subprojects/lvgl/src/core/../lv_conf_internal.h:54:42: fatal
error:
/mnt/raid10/yocto/scarthgap/up2u/tmp/work/corei7-64-poky-1/libdrmpp/git/git/examples/lvgl/lv_conf.h:
No such file or directory
| 54 | #include __LV_TO_STR(LV_CONF_PATH)
| | ^
| compilation terminated.
```
Observations:
```
$ ls -la
/mnt/raid10/yocto/scarthgap/up2u/tmp/work/corei7-64-poky-1/libdrmpp/git/git/examples/lvgl/lv_conf.h
ls: cannot access
'/mnt/raid10/yocto/scarthgap/up2u/tmp/work/corei7-64-poky-1/libdrmpp/git/git/examples/lvgl/lv_conf.h':
No such file or directory
```
```
$ ls -la
/mnt/raid10/yocto/scarthgap/up2u/tmp/work/corei7-64-poky-linux/libdrmpp/git/git/examples/lvgl/lv_conf.h
-rw-r--r--. 1 joel joel 36431 Dec 9 16:39
/mnt/raid10/yocto/scarthgap/up2u/tmp/work/corei7-64-poky-linux/libdrmpp/git/git/examples/lvgl/lv_conf.h
```
The same meson snippet works correctly on desktop
Why does `meson.current_source_dir()` in Yocto build return an incorrect
path?
Thanks,
Joel
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