message: [waf] Add --variant=asan
diff: @@ -117,17 +117,26 @@ def configure(ctx):
  ctx.load('compiler_cxx')
  cxxflags = ['-g', '-std=c++11', '-Wall', '-Wno-sign-compare', '-Werror']
  + ldflags = []
  # /Zi: -g, /WX: -Werror, /W3: roughly -Wall, there is no -std=c++11 equivalent in MSVC.
  # /wd4722: ignores warning C4722 (destructor never returns) in loguru
  # /wd4267: ignores warning C4267 (conversion from 'size_t' to 'type'), roughly -Wno-sign-compare
  msvcflags = ['/nologo', '/FS', '/EHsc', '/Zi', '/W3', '/WX', '/wd4996', '/wd4722', '/wd4267', '/wd4800']
  - if ctx.options.variant != 'debug':
  + if ctx.options.variant == 'asan':
  + cxxflags.append('-fsanitize=address,undefined')
  + cxxflags.append('-O')
  + ldflags.append('-fsanitize=address,undefined')
  + elif ctx.options.variant == 'debug':
  + pass
  + else:
  cxxflags.append('-O3')
  msvcflags.append('/O2') # There is no O3
  if ctx.env.CXX_NAME != 'msvc':
  # If environment variable CXXFLAGS is unset, provide a sane default.
  if not ctx.env.CXXFLAGS:
  ctx.env.CXXFLAGS = cxxflags
  + if not ctx.env.LDFLAGS:
  + ctx.env.LDFLAGS = ldflags
  else:
  ctx.env.CXXFLAGS = msvcflags
  