BTW from the RHEL based spec file:
%install %{__rm} -rf %{buildroot} %{__make} install DESTDIR="%{buildroot}" AM_INSTALL_PROGRAM_FLAGS=""
Your spec file calls install-am, which skips BUILT_SOURCES.
BTW from the RHEL based spec file:
%install "%{buildroot} " AM_INSTALL_ PROGRAM_ FLAGS=" "
%{__rm} -rf %{buildroot}
%{__make} install DESTDIR=
Your spec file calls install-am, which skips BUILT_SOURCES.