/home/joseph/buildroot-test/instance-3/output/build/boost-1.67.0/libs/predef/check/../tools/check/predef.jam:46: Unescaped special character in argument $(language)::$(expression)
...found 9 targets...
...updating 4 targets...
gcc.compile.c++ libs/config/checks/architecture/bin/gcc-6.4.0/debug/32.o
...updated 4 targets...
...found 2 targets...
...updating 1 target...
gcc.compile.c++ libs/config/checks/architecture/bin/gcc-6.4.0/debug/arm.o
...updated 1 target...
...found 3 targets...
...updating 3 targets...
link.touch bin.v2/test-symlink-source
link.mklink bin.v2/test-symlink
...updated 3 targets...
...found 125 targets...
...updating 8 targets...
gcc.compile.c++ bin.v2/libs/regex/build/gcc-6.4.0/debug/has_icu_test.o
libs/regex/build/has_icu_test.cpp:12:30: fatal error: unicode/uversion.h: No such file or directory
 #include <unicode/uversion.h>
                              ^
compilation terminated.

    "/home/joseph/buildroot-test/instance-3/output/host/bin/arm-linux-g++"   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os   -Wl,-elf2flt -static  -Wl,-elf2flt -static -fPIC -O0 -fno-inline -Wall -pedantic -g  -DBOOST_ALL_NO_LIB=1 -DBOOST_HAS_ICU=1  -I"." -c -o "bin.v2/libs/regex/build/gcc-6.4.0/debug/has_icu_test.o" "libs/regex/build/has_icu_test.cpp"

...failed gcc.compile.c++ bin.v2/libs/regex/build/gcc-6.4.0/debug/has_icu_test.o...
...skipped <pbin.v2/libs/regex/build/gcc-6.4.0/debug>has_icu for lack of <pbin.v2/libs/regex/build/gcc-6.4.0/debug>has_icu_test.o...
...skipped <pbin.v2/libs/regex/build/gcc-6.4.0/debug>has_icu.passed for lack of <pbin.v2/libs/regex/build/gcc-6.4.0/debug>has_icu...
...failed updating 1 target...
...skipped 2 targets...
...updated 5 targets...
...patience...
...found 178 targets...
...updating 14 targets...
gcc.compile.c++ bin.v2/libs/thread/build/gcc-6.4.0/debug/threading-multi/has_atomic_flag_lockfree_test.o
gcc.compile.c++ bin.v2/libs/system/build/gcc-6.4.0/debug/threading-multi/error_code.o
gcc.link.dll bin.v2/libs/system/build/gcc-6.4.0/debug/threading-multi/libboost_system.so.1.67.0
ld (ld-elf2flt): -shared used without passing a shared library ID
collect2: error: ld returned 1 exit status

    "/home/joseph/buildroot-test/instance-3/output/host/bin/arm-linux-g++"    -o "bin.v2/libs/system/build/gcc-6.4.0/debug/threading-multi/libboost_system.so.1.67.0" -Wl,-h -Wl,libboost_system.so.1.67.0 -shared -Wl,--start-group "bin.v2/libs/system/build/gcc-6.4.0/debug/threading-multi/error_code.o"  -Wl,-Bstatic  -Wl,-Bdynamic -lrt -Wl,--end-group -fPIC -pthread -g  -Wl,-elf2flt -static 

...failed gcc.link.dll bin.v2/libs/system/build/gcc-6.4.0/debug/threading-multi/libboost_system.so.1.67.0...
...skipped <pbin.v2/libs/thread/build/gcc-6.4.0/debug/threading-multi>has_atomic_flag_lockfree for lack of <pbin.v2/libs/system/build/gcc-6.4.0/debug/threading-multi>libboost_system.so.1.67.0...
...failed updating 1 target...
...skipped 1 target...
...updated 12 targets...
...found 1 target...
...updating 1 target...
config-cache.write bin.v2/project-cache.jam
...updated 1 target...