Fix module-import-in-extern-c compiler error #10488
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This fixes a compiler error when building C++ projects that use the
'modules' C++ language feature consume Mbed TLS. The specific error is
module-import-in-extern-c, which occurs when `#include`s occur within
`extern C` blocks.
```
$ clang-17 -std=c++20 -fmodules -Itf-psa-crypto/include -Itf-psa-crypto/drivers/builtin/include -o sample sample.cpp
In file included from sample.cpp:8:
In file included from tf-psa-crypto/drivers/builtin/include/mbedtls/private/chachapoly.h:44:
tf-psa-crypto/drivers/builtin/include/mbedtls/private/chacha20.h:26:1: error: import of C++ module '_Builtin_stdint' appears within extern "C" language linkage specification [-Wmodule-import-in-extern-c]
26 | #include <stdint.h>
| ^
tf-psa-crypto/drivers/builtin/include/mbedtls/private/chachapoly.h:35:1: note: extern "C" language linkage specification begins here
35 | extern "C" {
| ^
1 error generated.
```
This seems to primarily be an issue with clang. See
https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fmodules
Signed-off-by: zacharykeyessonos <zachary.keyes@sonos.com>
This was referenced Oct 31, 2025
Signed-off-by: zacharykeyessonos <zachary.keyes@sonos.com>
Signed-off-by: zacharykeyessonos <zachary.keyes@sonos.com>
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Description
This fixes #10490.
This fixes a compiler error when building C++ projects that use the 'modules' C++ language feature consume Mbed TLS. The specific error is module-import-in-extern-c, which occurs when
#includes occur withinextern Cblocks.Example:
This seems to primarily be an issue with clang. See https://clang.llvm.org/docs/ClangCommandLineReference.html#cmdoption-clang-fmodules
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