>>> Paolo Bonzini <pbonz...@redhat.com> 2017/2/13 星期一 下午 6:07 >>> > > >On 13/02/2017 10:51, Lin Ma wrote: >> By commit 67a1de0d, When we perform 'git pull && make && sudo make install', >> In 'make' stage a qemu-version.h.tmp will be generated. If the content of >> qemu-version.h.tmp and qemu-version.h aren't consistent, The >> qemu-version.h.tmp >> will be renamed to qemu-version.h. Because of the target FORCE, The same >> action >> will be do again in 'make install' stage. > >But why does the content of .h and .h.tmp not match during "make install"? The content of qemu-version.h recorded the git head info of last build. After 'git pull && make ', Because the content of qemu-version.h.tmp is generated based on the lastest git describe, Now this .h.tmp and the old .h aren't consistent, So this .h.tmp will be renamed to qemu-version.h. Then during 'sudo make install', because there is no .h.tmp any more, a new one will be generated with privileged permissions.
Thanks, Lin
