[llvm-dev] trunk check-all failing on Linux using compiler-rt and libcxx

[Steve Downey via llvm-dev]

Posting to the list first, rather than filing a bug because I'm not sure
this is still an intended configuration:

With LLVM configured as:
CXX=clang++ CC=clang cmake ../llvm/  \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_INSTALL_PREFIX=~/install/llvm-master/ \
-DLLVM_TARGETS_TO_BUILD=host \
-DLLVM_ENABLE_ASSERTIONS=true \
-DLLVM_ENABLE_LIBCXX=yes \
-DLLVM_ENABLE_LIBCXXABI=yes

The check-all target is failing to compile the interception tests:
/home/sdowney/bld/llvm-master/llvm/projects/compiler-rt/lib/interception/tests/interception_linux_test.cc:26:18:
error: redefinition of 'isdigit'
INTERCEPTOR(int, isdigit, int d) {
                 ^
/usr/include/ctype.h:185:1: note: previous definition is here
__isctype_f (digit)
^
/usr/include/ctype.h:93:3: note: expanded from macro '__isctype_f'
  is##type (int __c) __THROW
   \
  ^
<scratch space>:835:1: note: expanded from here
isdigit

Without the tests, clang builds and appears to work. And in the checkin
prior to the interception tests, the tests all passed.
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