I downloaded the last ICU release (49) binaries and add the following arg to b2:
-sICU_PATH="D:\lib64\icu"
I got
gcc.link D:\boost\1.51.0\boost\boost\bin.v2\libs\locale\build\gcc-mingw-4.7.1\debug\has_icu64.exe
d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.7.1/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -licui18n
d:/mingw/bin/../lib/gcc/x86_64-w64-mingw32/4.7.1/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -licudata
collect2.exe: error: ld returned 1 exit status
There were not such libicui18n, libicudata among icu binaries.
So I tried to build it myself. I got this error
PATH=../../lib:../../stubdata:../../tools/ctestfw:$PATH ../../bin/genrb -e UTF-8 -s resources -d uconvmsg root.txt
Makefile:173: recipe for target `uconvmsg/root.res' failed
make[2]: *** [uconvmsg/root.res] Error 127
Could somebody suggest me how I should build Boost with ICU using MinGW?