build options:
CFLAGS   = -std=c++11 -pedantic -Wall -Os -I. -I/usr/include -DVERSION="ALPHA"
LDFLAGS  = -s -L/usr/lib -lc -pthread -lboost_system
CC       = clang++ -v
CC -o main
clang version 3.1 (branches/release_31)
Target: x86_64-pc-linux-gnu
Thread model: posix
 "/usr/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name main.cpp -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version 2.21.1 -momit-leaf-frame-pointer -v -resource-dir /usr/bin/../lib/clang/3.1 -fmodule-cache-path /var/tmp/clang-module-cache -internal-isystem /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4 -internal-isystem /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/x86_64-pc-linux-gnu -internal-isystem /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/backward -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/clang/3.1/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir "/home/richter/src/ARCADIVS/Environment Plus" -ferror-limit 19 -fmessage-length 0 -pthread -mstackrealign -fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak -fobjc-fragile-abi -fcxx-exceptions -fexceptions -fdiagnostics-show-option -o /tmp/main-1yTYVB.o -x c++ main.cpp
clang -cc1 version 3.1 based upon LLVM 3.1 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/x86_64-pc-linux-gnu
 /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/backward
 /usr/local/include
 /usr/bin/../lib/clang/3.1/include
 /usr/include
End of search list.
 "/usr/bin/x86_64-pc-linux-gnu-ld" -s --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o main /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../../..//lib/../lib64/crt1.o /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../../..//lib/../lib64/crti.o /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/crtbegin.o -L/usr/lib -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2 -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../../..//lib/../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib//../../lib64 -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../../..//lib -L/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../.. -L/lib -L/usr/lib /tmp/main-1yTYVB.o -lc -lboost_system -lstdc++ -lm -lgcc_s -lgcc -lpthread -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/crtend.o /usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/../../../..//lib/../lib64/crtn.o
/tmp/main-1yTYVB.o: In function `boost::filesystem3::exists(boost::filesystem3::path const&)':
main.cpp:(.text._ZN5boost11filesystem36existsERKNS0_4pathE[_ZN5boost11filesystem36existsERKNS0_4pathE]+0x1b): undefined reference to `boost::filesystem3::detail::status(boost::filesystem3::path const&, boost::system::error_code*)'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [main] Error 1