httpd illegal instruction by rebuild with rpmrc file

[Dominik Kucher]

when i rebuild the src.rpm with my .rpmrc file i became the error "illegal
instruction", when i create the rpm without the .rpmrc file it works perfectly!
other builds (pure-ftpd, mpd, mpdscribble, samba, openssl) works with my rpmrc file, but
why it breaks httpd-* and mod_* files? maybe the problem of my mod_ssl build?
 i use the httpd-2.4.25-3.fc25.src.rpm file 

This is my .rpmrc file:

[builduser@buildsrv]: cat /home/builduser/.rpmrc 
optflags: x86_64 %{__global_cflags} -m64 -march=core2 -mtune=core2

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Dominik Kucher