stm32: allow excluding mbedTLS to fit flash-constrained stm32g474ret6#2367
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The stm32g474ret6 has only 384 KB of flash. Cumulative firmware growth pushed the build past that limit, and mbedTLS/crypto accounts for ~38 KB. The G474 has an RNG, so crypto was pulled in unconditionally via STM32_HAS_RNG. Add an AVM_DISABLE_MBEDTLS option that forces the existing no-crypto build path (already used by RNG-less devices such as the G0B1) even on devices that have an RNG, and enable it for stm32g474ret6 in CI. Signed-off-by: Paul Guyot <pguyot@kallisys.net>
bettio
approved these changes
Jul 19, 2026
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The stm32g474ret6 has only 384 KB of flash. Cumulative firmware growth pushed the build past that limit, and mbedTLS/crypto accounts for ~38 KB. The G474 has an RNG, so crypto was pulled in unconditionally via STM32_HAS_RNG.
Add an AVM_DISABLE_MBEDTLS option that forces the existing no-crypto build path (already used by RNG-less devices such as the G0B1) even on devices that have an RNG, and enable it for stm32g474ret6 in CI.
These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).
SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later