Seen here:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:Gcc7/open-vm-tools/standard/i586

[  148s] hgfsServer.c: In function 'HgfsServerRead':
[  148s] hgfsServer.c:6541:43: error: taking address of packed member of
'struct HgfsReplyReadV3' may result in an unaligned pointer value
[-Werror=address-of-packed-member]
[  148s]  6541 |                                           &reply->actualSize);
[  148s]       |                                           ^~~~~~~~~~~~~~~~~~
[  148s] hgfsServer.c:6562:56: error: taking address of packed member of
'struct HgfsReplyRead' may result in an unaligned pointer value
[-Werror=address-of-packed-member]
[  148s]  6562 |                                        reply->payload,
&reply->actualSize);
[  148s]       |                                                       
^~~~~~~~~~~~~~~~~~
[  152s] cc1: all warnings being treated as errors
[  152s] make[2]: *** [Makefile:515: hgfsServer.lo] Error 1