`--> ~/build/bin/clang-4.0 -isysroot /tmp -c x.c -v
clang version 4.0.0 (tags/RELEASE_400/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/yamaguchi/build/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.0.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.4.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
 "/home/yamaguchi/build/bin/clang-4.0" -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name x.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -v -dwarf-column-info -debugger-tuning=gdb -coverage-notes-file /tmp/x.gcno -resource-dir /home/yamaguchi/build/bin/../lib/clang/4.0.0 -isysroot /tmp -internal-isystem /usr/local/include -internal-isystem /home/yamaguchi/build/bin/../lib/clang/4.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir /tmp -ferror-limit 19 -fmessage-length 119 -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o x.o -x c x.c
clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/tmp/usr/local/include"
ignoring nonexistent directory "/tmp/home/yamaguchi/build/bin/../lib/clang/4.0.0/include"
ignoring nonexistent directory "/tmp/usr/include/x86_64-linux-gnu"
ignoring nonexistent directory "/tmp/include"
ignoring nonexistent directory "/tmp/usr/include"
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