Use external toolchain for sama5d2_xplained_xaprc defconfig

[drbild]

The build is faster with an external toolchain, since it doesn't need to be compiled as part of the build.

This also fixes compilation of some Xaptum packages.

[peterhaijen]

Unfortunately, this is not helping. In fact, I think the problem remains exactly the same.

../../examples/xtt_client.c: In function ‘initialize_server_id’:
../../examples/xtt_client.c:353:40: error: unused parameter ‘tcti_type’ [-Werror=unused-parameter]
                          xtt_tcti_type tcti_type,
                                        ^~~~~~~~~
../../examples/xtt_client.c:354:38: error: unused parameter ‘dev_file’ [-Werror=unused-parameter]
                          const char* dev_file)
                                      ^~~~~~~~
../../examples/xtt_client.c: In function ‘initialize_daa’:
../../examples/xtt_client.c:403:91: error: unused parameter ‘tcti_type’ [-Werror=unused-parameter]
 int initialize_daa(struct xtt_client_group_context *group_ctx, int use_tpm, xtt_tcti_type tcti_type, const char* dev_file)
                                                                                           ^~~~~~~~~
../../examples/xtt_client.c:403:114: error: unused parameter ‘dev_file’ [-Werror=unused-parameter]
 int initialize_daa(struct xtt_client_group_context *group_ctx, int use_tpm, xtt_tcti_type tcti_type, const char* dev_file)
                                                                                                                  ^~~~~~~~

[drbild]

Hmm, a clean build of this commit works for me:

make clean
make sama5d2_xplained_xaprc_defconfig
make

I just rebased this on the current master. Now I get the same failure.

[drbild]

Unfortunately, this is not helping. In fact, I think the problem remains exactly the same.

../../examples/xtt_client.c: In function ‘initialize_server_id’:
../../examples/xtt_client.c:353:40: error: unused parameter ‘tcti_type’ [-Werror=unused-parameter]
                          xtt_tcti_type tcti_type,
                                        ^~~~~~~~~

TLDR: Disable BR2_PACKAGE_XTT_UTILS. TLDR: Enable BR2_PACKAGE_XTT_TPM_SUPPORT.

That's a problem in the xtt example programs. The compiler used for development had less strict warnings. They weren't tested with USE_TPM=OFF. It's been fixed in xtt master, but we haven't cut a release yet.

For now, we should enable TPM support on this config. (We have a TPM USB stick that can be used with the Xplained board, so it makes sense to have the TPM support enabled here.)