(I am listing a problem in compling boost/regex, and a solution, and want to know if this is the right approach. We are trying to use boost as a static library, with regex and icu support. Thanks. =cs) Here used is the vanilla static compile of ICU (i.e. no changes to icu4c-4_6-src.tgz), installed in subdirectory icu2 as: ./bootstrap.sh --with-icu=/home/cxs/icu2 --prefix=osboost --without-libraries=python link=static variant=release ==================================================================== $ ./bjam --list-libraries -d+2 .... .... gcc.compile.c++ bin.v2/libs/regex/build/gcc-4.1.2/debug/has_icu_test.o "g++" -ftemplate-depth-128 -O0 -fno-inline -Wall -pedantic -g -fPIC -DBOOST_ALL_NO_LIB=1 -DBOOST_HAS_ICU=1 -I"." -I"/home/cxs/icu2/include" -c -o "bin.v2/libs/regex/build/gcc-4.1.2/debug/has_icu_test.o" "libs/regex/build/has_icu_test.cpp" libs/regex/build/has_icu_test.cpp:26:2: warning: no newline at end of file libs/regex/build/has_icu_test.cpp: In function 'int main()': libs/regex/build/has_icu_test.cpp:24: warning: unused variable 'c' gcc.link bin.v2/libs/regex/build/gcc-4.1.2/debug/has_icu "g++" -L"/home/cxs/icu2/lib" -Wl,-R -Wl,"/home/cxs/icu2/bin" -Wl,-R -Wl,"/home/cxs/icu2/lib" -Wl,-rpath-link -Wl,"/home/cxs/icu2/lib" -o "bin.v2/libs/regex/build/gcc-4.1.2/debug/has_icu" -Wl,--start-group "bin.v2/libs/regex/build/gcc-4.1.2/debug/has_icu_test.o" -Wl,-Bstatic -Wl,-Bdynamic -licuuc -licui18n -licudata -Wl,--end-group -g /home/cxs/icu2/lib/libicuuc.a(putil.ao): In function `uprv_dl_sym_46': putil.c:(.text+0x241): undefined reference to `dlsym' /home/cxs/icu2/lib/libicuuc.a(putil.ao): In function `uprv_dl_open_46': putil.c:(.text+0x2a6): undefined reference to `dlopen' /home/cxs/icu2/lib/libicuuc.a(putil.ao): In function `uprv_dl_close_46': putil.c:(.text+0x269): undefined reference to `dlclose' collect2: ld returned 1 exit status ...failed updating 1 target... Performing configuration checks - has_icu builds : no .... .... (So icu is not detected due to a missing -ldl flag in the last call to g++ above.) ==================================================================== This issue is taken care of by adding to libs/regex/build/Jamfile.v2 these lines to the else clause of if $(ICU_LINK) {...} else { lib dl : : <search>$(ICU_PATH)/lib <link>shared <runtime-link>shared ; lib dl : : <toolset>msvc <variant>debug <name>dl <search>$(ICU_PATH)/lib <link>shared <runtime-link>shared ; lib dl : : <name>this_is_an_invalid_library_name ; ... } and add to ICU_OPTS = <library>dl/<link>shared/<runtime-link>shared The question is: is this the correct approach? Thanks, =cs