cconvey@spaceman /tmp/y $ /home/cconvey/src/llvm-install/bin/clang -v -fsanitize=dataflow  example.c -lreadline
clang version 3.6.0 (https://github.com/llvm-mirror/clang 76d233c3472e061dbe64101040fde2e0e8644895) (https://github.com/llvm-mirror/llvm 6a9506acf9237da888851031f582b44be36ce441)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.9.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.6.4
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9.1
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
 "/home/cconvey/src/llvm-install/bin/clang-3.6" -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free -main-file-name example.c -mrelocation-model pic -pic-level 2 -pie-level 2 -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 -resource-dir /home/cconvey/src/llvm-install/bin/../lib/clang/3.6.0 -internal-isystem /usr/local/include -internal-isystem /home/cconvey/src/llvm-install/bin/../lib/clang/3.6.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdebug-compilation-dir /tmp/y -ferror-limit 19 -fmessage-length 190 -fsanitize=dataflow -fsanitize-blacklist=/home/cconvey/src/llvm-install/bin/../lib/clang/3.6.0/dfsan_abilist.txt -mstackrealign -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/example-1a5156.o -x c example.c
clang -cc1 version 3.6.0 based upon LLVM 3.6.0 default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /home/cconvey/src/llvm-install/bin/../lib/clang/3.6.0/include
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
 "/usr/bin/ld" -pie --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/Scrt1.o /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/4.8/crtbeginS.o -L/usr/lib/gcc/x86_64-linux-gnu/4.8 -L/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/4.8/../../.. -L/home/cconvey/src/llvm-install/bin/../lib -L/lib -L/usr/lib -whole-archive /home/cconvey/src/llvm-install/bin/../lib/clang/3.6.0/lib/linux/libclang_rt.dfsan-x86_64.a -no-whole-archive --dynamic-list=/home/cconvey/src/llvm-install/bin/../lib/clang/3.6.0/lib/linux/libclang_rt.dfsan-x86_64.a.syms /tmp/example-1a5156.o -lreadline --no-as-needed -lpthread -lrt -lm -ldl -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/lib/gcc/x86_64-linux-gnu/4.8/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crtn.o
/tmp/example-1a5156.o: In function `main':
example.c:(.text+0x2d): undefined reference to `dfs$readline'
clang-3.6: error: linker command failed with exit code 1 (use -v to see invocation)