Warn if mbedtls_config.h is included manually

Some projects using Mbed TLS have migrated their configuration
file (config.h -> mbedtls_config.h, or MBEDTLS_CONFIG_FILE) from Mbed TLS
2.x, and kept including check_config.h. This is unnecessary since Mbed TLS
3.0, and increasingly in 3.x it may report spurious errors because the
configuration adjustments have not been done yet.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2024-05-16 14:54:04 +02:00
parent 66b2742a6c
commit f948e2fa52

View File

@ -19,6 +19,13 @@
#define MBEDTLS_CHECK_CONFIG_H
/* *INDENT-OFF* */
#if !defined(MBEDTLS_CONFIG_IS_FINALIZED)
#warning "Do not include mbedtls/check_config.h manually! " \
"This may cause spurious errors. " \
"It is included automatically at the right point since Mbed TLS 3.0."
#endif /* !MBEDTLS_CONFIG_IS_FINALIZED */
/*
* We assume CHAR_BIT is 8 in many places. In practice, this is true on our
* target platforms, so not an issue, but let's just be extra sure.