Now that LLVM 2.7 has been released, I thought I'd have a go at building 
macruby trunk against it. I had to build LLVM with RTTI support enabled, and 
made some minor patches to get through the initial compilation stage (basically 
removing includes of ModuleProvider.h and use of ExistingModuleProvider -- 
attached). Compiling with LLVM_TOT then seemed to be progressing well until it 
segfaulted here:

/usr/bin/gcc -I. -I../../include -I../../include/ruby/backward -I../../include 
-I. -DHAVE_EDITLINE_READLINE_H -DHAVE_RL_GETC_FUNCTION 
-DHAVE_RL_FILENAME_COMPLETION_FUNCTION -DHAVE_RL_COMPLETION_MATCHES 
-DHAVE_RL_DEPREP_TERM_FUNCTION -DHAVE_RL_COMPLETION_APPEND_CHARACTER 
-DHAVE_RL_BASIC_WORD_BREAK_CHARACTERS -DHAVE_RL_COMPLETER_WORD_BREAK_CHARACTERS 
-DHAVE_RL_COMPLETER_QUOTE_CHARACTERS -DHAVE_RL_ATTEMPTED_COMPLETION_OVER 
-DHAVE_RL_LIBRARY_VERSION -DHAVE_RL_LINE_BUFFER -DHAVE_RL_POINT 
-DHAVE_RL_CLEANUP_AFTER_SIGNAL -DHAVE_RL_SET_SCREEN_SIZE 
-DHAVE_RL_GET_SCREEN_SIZE -DHAVE_REPLACE_HISTORY_ENTRY -DHAVE_REMOVE_HISTORY 
-DHAVE_CLEAR_HISTORY  -fno-common -fexceptions -fno-common -pipe -O3 -g -Wall 
-Wno-parentheses -arch i386 -arch x86_64 -o readline.o -c readline.c
/usr/bin/gcc -dynamic -bundle -undefined suppress -flat_namespace -arch i386 
-arch x86_64 -o readline.bundle readline.o -L. -L../..   -arch i386 -arch 
x86_64  -lmacruby -ledit -lncurses   
cd ext/ripper && ../../miniruby -I../.. -I../../lib -r rbconfig -e 
"RbConfig::CONFIG['libdir'] = '../..'; require './extconf.rb'"
checking for bison... yes
unknown: [BUG] Segmentation fault
MacRuby version 0.6 (ruby 1.9.0) [universal-darwin10.0, x86_64]

sh: line 1: 95261 Abort trap              ../../miniruby -I../.. -I../../lib -r 
rbconfig -e "RbConfig::CONFIG['libdir'] = '../..'; require './extconf.rb'"
rake aborted!
Command failed with status (134): [cd ext/ripper && ../../miniruby -I../.. 
-I...]

Any idea what's going wrong here? My knowledge of macruby and llvm is somewhat 
limited. I'm building on 10.6, btw.

Craig

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