gistfile1.txt

$ ./waf configure
reinitialized logger
subdirectories dir = ['wscript']
extensions subdirs = []
Running init() - this constructs the matrix of legal waf operation names 
Setting top to                           : /home/elias/src/clasp 
Setting out to                           : /home/elias/src/clasp/build 
cfg.options.enable_mpi = None 
configure() 
wscript.config option LLVM_CONFIG_BINARY = /home/elias/src/llvm-project/dist/bin/llvm-config
wscript.config option USE_PARALLEL_BUILD = True
wscript.config option USE_LLD = True
wscript.config option PREFIX = /home/elias/src/clasp/dist/
wscript.config option DEBUG_OPTIONS = ['DEBUG_RELEASE', 'DEBUG_BCLASP_LISP', 'DEBUG_CCLASP_LISP']
Checking for waf version in 1.7.5-2.1.0  : ok 
DEST_OS = linux
Using llvm-config binary: /home/elias/src/llvm-project/dist/bin/llvm-config
PATH has been prefixed with '/home/elias/src/llvm-project/dist/bin'
Checking for program 'git'               : /usr/bin/git 
default cfg.env.CLASP_BUILD_MODE = faso, final cfg.env.LTO_FLAG = '[]'
Traceback (most recent call last):
  File "/home/elias/src/clasp/.waf3-2.0.10-21b9fcc8516c313e4e3a81dc239e6d66/waflib/Scripting.py", line 119, in waf_entry_point
    run_commands()
  File "/home/elias/src/clasp/.waf3-2.0.10-21b9fcc8516c313e4e3a81dc239e6d66/waflib/Scripting.py", line 179, in run_commands
    ctx=run_command(cmd_name)
  File "/home/elias/src/clasp/.waf3-2.0.10-21b9fcc8516c313e4e3a81dc239e6d66/waflib/Scripting.py", line 170, in run_command
    ctx.execute()
  File "/home/elias/src/clasp/.waf3-2.0.10-21b9fcc8516c313e4e3a81dc239e6d66/waflib/Configure.py", line 85, in execute
    super(ConfigurationContext,self).execute()
  File "/home/elias/src/clasp/.waf3-2.0.10-21b9fcc8516c313e4e3a81dc239e6d66/waflib/Context.py", line 85, in execute
    self.recurse([os.path.dirname(g_module.root_path)])
  File "/home/elias/src/clasp/.waf3-2.0.10-21b9fcc8516c313e4e3a81dc239e6d66/waflib/Context.py", line 126, in recurse
    user_function(self)
  File "/home/elias/src/clasp/wscript", line 992, in configure
    raise Exception("You must have clang/llvm version %d installed - you have %s" % (LLVM_VERSION, cur_clang_version[0]) )
Exception: You must have clang/llvm version 9 installed - you have 1