fails to build under Raspbian - alignment of pointers

[CDKnightNASA]

Describe the bug
Trying to build under Raspbian, sample_app fails with "cast increases required alignment of target type" errors.

/home/pi/cFS/apps/sample_app/fsw/src/sample_app.c:365:25: error: cast increases required alignment of target type [-Werror=cast-align]
     CFE_SB_TimeStampMsg((CFE_SB_Msg_t *) &Sample_AppData.SAMPLE_HkTelemetryPkt);
                         ^
/home/pi/cFS/apps/sample_app/fsw/src/sample_app.c:366:20: error: cast increases required alignment of target type [-Werror=cast-align]
     CFE_SB_SendMsg((CFE_SB_Msg_t *) &Sample_AppData.SAMPLE_HkTelemetryPkt);

To Reproduce
Build on Raspbian.

Expected behavior
Should not cause warnings/errors.

Code snips

System observed on:
Raspberry Pi Zero W

Additional context
Add any other context about the problem here.

Reporter Info
Christopher.D.Knight@nasa.gov

[CDKnightNASA]

Note that CFE_SB_InitMsg() takes a void *, whereas TimeStampMsg and SendMsg take CFE_SB_MsgPtr_t. I'm guessing InitMsg should be updated to use CFE_SB_MsgPtr_t.

[jphickey]

See also nasa/cFE#440 about the API inconsistency here.

[jphickey]

The alignment warnings are the same general issue as in nasa/cFE#313. If you want you can assign this to me and just turn off -Wcast-align in your build for now.