Dear Haiying Wang, In message <1295906076.2051.127.camel@haiying-laptop> you wrote: > > > What I do not understand is what the TPL_BOOT variable in the > > Makefile is good for. I cannot understand the current use. > > Well, it was used to generate the tpl image under tpl/ directory. Maybe > TPL_BOOT is a bad name here, I just thought it was too simple to use TPL.
It's not the name. But you use it ina few places here, buth then hard encode "tpl" in a number of other paces there. Which means that you cannot change TPL_BOOT to any other value, or building would break. So why do we need this variable? > > > > > +$(TPL_BOOT): $(TIMESTAMP_FILE) $(VERSION_FILE) depend > > > > > + $(MAKE) -C tpl/board/$(BOARDDIR) all > > > > > > > > Assume CONFIG_TPL_U_BOOT is not defined, then TPL_BOOT is not defined, > > > > and this rule will probably cause a build error, doesn't it? > > > No, I don't think there is a build error. > > > > WEell, if CONFIG_TPL_U_BOOT is not 'y', then TPL_BOOT is not > > defined, which results in this make rule: > > > > : $(TIMESTAMP_FILE) $(VERSION_FILE) depend > > $(MAKE) -C tpl/board/$(BOARDDIR) all > > > > i. e. there would be no target name befoe the semicolon. > If TPL_BOOT here is not defined, the reset(after semicolon) will not be > executed, just like NAND_SPL and ONENAND_IPL etc. Sorry, I cannot follow - which reset? which semicolon? Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Quantum Mechanics is God's version of "Trust me." _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
