why the code update 11.02 is incompatible with Makefile? about hw

[zdraw]

I assume you're talking about the simulation Makefile, please correct me if I'm wrong.
The code base has started to introduce ways to configure the RTL. Part of this includes a preprocess step before the simulation Makefile can be called.
The steps are run "make" at hw/. This sets up paths and projects (nv_large or nv_small) You may need to provide input if your tools paths are different than ours. Since you had the original nv_large code, I suggest only trying to build nv_large)
You can double check or modify the paths and projects by opening tree.make after you're done.
You should also set PERL_ROOT and put this in your PATH variable. I have to do the following:
setenv PERL_ROOT /home/utils/perl-5.8.8
setenv PATH $PERL_ROOT/bin:$PATH
Then run "tools/bin/tmake" to run the preprocessor on the design. The outputs are placed in outdir/nvlarge

At this point you should be able to run the simulation Makefile as before. I suggest doing "make clean" in hw/verif/sim to clean out the old build objects before doing "make build" to create the simv.

[zdraw]

Closing. Please reopen if you're still seeing that error.

[CrazyBingo]

I'm sorry to be a little busy on a business trip, Return this topic back now.
Today I have down the code of 20171121, and done as you said:
1: hw path make, input c++/perl/gcc+java path and nv_largd
2: set perl variable in .cshrc
3: then run hw/tools/bin/tmake, but there is sth. wrong tha can not load YAML.pm and interrupted, which is execute： use YAML qw（LoadFile）
@zdraw

the error is like that:
Can't locate YAML.pm in @inc (@inc contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at ./tmake line 8.
BEGIN failed--compilation aborted at ./tmake line 8.

seems that perl path variable is wrong,..