unable to infer compiler target triple for clang

unable to infer compiler target triple for clang

I have modified the clang. It was working properly. But then I had some
git related issues so I cleaned the git and checked out again. Now when I
try to run make clean in clang I am getting the following error. How can I
fix this?
warning: clang_darwin.mk: dropping arch 'i386' from lib 'eprintf'
warning: clang_darwin.mk: dropping arch 'i386' from lib '10.4'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib '10.4'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'ios'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'ios'
warning: clang_darwin.mk: dropping arch 'armv7' from lib 'ios'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'osx'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'osx'
warning: clang_darwin.mk: dropping arch 'armv7' from lib 'cc_kext'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'cc_kext'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'cc_kext'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'cc_kext_ios5'
warning: clang_darwin.mk: dropping arch 'armv7' from lib 'cc_kext_ios5'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'profile_osx'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'profile_osx'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'profile_ios'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'profile_ios'
warning: clang_darwin.mk: dropping arch 'armv7' from lib 'profile_ios'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'asan_osx_dynamic'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'asan_osx_dynamic'
warning: clang_darwin.mk: dropping arch 'i386' from lib 'ubsan_osx'
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'ubsan_osx'
make[5]: Entering directory `/home/test/llvm/projects/compiler-rt'
make/platform/clang_linux.mk:16: *** "unable to infer compiler target
triple for clang". Stop.
make[5]: Leaving directory `/home/test/llvm/projects/compiler-rt'
make[4]: *** [CleanRuntimeLibraries] Error 2
make[4]: Leaving directory `/home/test/llvm/tools/clang/runtime/compiler-rt'
make[3]: *** [compiler-rt/.makeclean] Error 2
make[3]: Leaving directory `/home/test/llvm/tools/clang/runtime'
make[2]: *** [clean] Error 1
make[2]: Leaving directory `/home/test/llvm/tools/clang'
make[1]: *** [clang/.makeclean] Error 2
make[1]: Leaving directory `/home/test/llvm/tools'
make: *** [clean] Error 1