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Currently we force selection on mbedtls for bctoolbox. If, for whatever reason, mbedTLS is not found, bctoolbox searches for PolarSSL and, if not present, fails with: ``` Could NOT find PolarSSL (missing: POLARSSL_INCLUDE_DIRS HAVE_POLARSSL_SSL_H) ``` This happens because bctoolbox enables support for mbedTLS and PolarSSL by default, whereas, if both are enabled, mbedTLS is preferred over PolarSSL. However, crypto support is not mandatory and support for both libraries can be turned off. Therefore, optionally depend on mbedTLS or PolarSSL and enable/disable the library support explicitly. This fixes the issue of searching for PolarSSL altough the dependency is not declared in the bctoolbox package. Note, that this does not fix the issue why mbedtls is not found although it is enabled. This issue is address in this thread [1]. Fixes: http://autobuild.buildroot.net/results/cfe/cfeb2f542598e5d450b332fb51a6d79bae24158c/ .. and more. [1] http://lists.busybox.net/pipermail/buildroot/2017-February/183055.html Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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