aviralgarg05 commented on PR #18374:
URL: https://github.com/apache/nuttx/pull/18374#issuecomment-3944412007
@linguini1
I reproduced the same failure pattern from #18232 using the reported setup
(`CONFIG_LIBM_TOOLCHAIN=y`, `CONFIG_LIBCXXTOOLCHAIN=y`,
I also captured a clear before/after with the exact same compile command:
```bash
g++-15 -std=gnu++17 \
-isystem <stub-config-path> \
-isystem <cxx-header-path> \
-c repro.cpp -o repro.o
```
Before this patch (using the previous `include/cxx/cmath`), build fails with
the same class of errors:
```text
.../include/c++/15/math.h:39:12: error: 'acos' has not been declared in 'std'
.../include/c++/15/math.h:40:12: error: 'asin' has not been declared in 'std'
.../include/c++/15/math.h:41:12: error: 'atan' has not been declared in 'std'
.../include/c++/15/math.h:42:12: error: 'atan2' has not been declared in
'std'
.../include/c++/15/math.h:43:12: error: 'cos' has not been declared in 'std'
...
```
After this patch (current `include/cxx/cmath`), the same command succeeds:
```text
(No output - build successful)
```
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