Yes. If you built libobjc2 (using cmake!) linking against libsupc++ Base will pick it up.
在 2013-6-13，上午2:14，Frank Rehwinkel <[email protected]> 写道： > In trying to understand your suggestion by searching the web for llvm and > libcxxrt references, I run into notes saying that clang is normally linked > with libsupc++. libsupc++ is in both the FreeBSD 9.1 host and the jail. > > Is using libsupc++ an option for building libobjc2 and gnustep-base? > > > On Wed, Jun 12, 2013 at 1:57 PM, Maxthon Chan <[email protected]> wrote: > Download and build it separately using the same SVN head version. > > If you built that, you should also build libc++ (LLVM's C++ runtime) and > (maybe) link it against libc++rt. > > Also, when building gnustep-base, specify -I/usr/local/include and > -L/usr/local/lib appropriately. > > 在 2013-6-13，上午1:54，Frank Rehwinkel <[email protected]> 写道： > >> gnustep-base configuration fails. See link error at the bottom and the >> command line from config.log. In trying to rebuild objc2 1.7-RC1, I get >> similar link errors now. I don't know why I didn't get these before but >> maybe because now gnustep-make has been installed. >> >> Anyway, these errors seem to indicate that the libcxxrt.a is needed but >> missing. In my FreeBSD 9.1 jail, there isn't even source for this library >> let alone the library, and no port. On the FreeBSD host, there are the >> source directories for it but as pointed out earlier, this library is not >> yet built automatically. >> >> On a fresh FreeBSD 9.1 jail, where llvm and clang (trunk head 3.4) have been >> manually built and installed to /usr/local, the configure step for -base >> fails to link objc code. >> >> If I do need the libcxxrt.a, how do I build on the host? If I can do that, >> manually copying library and headers to jail is then necessary I guess. >> >> I tried to follow instructions from >> http://lists.gnu.org/archive/html/gnustep-dev/2013-03/msg00127.html >> (Building libobjc2 on FreeBSD 9.1 with clang 3.2 using cmake fails) >> >> which says to add MK_LIBCPLUSPLUS = yes >> to /etc/make.conf but then make in /usr/src/lib/libcxxrt gives this error >> >> "/usr/share/mk/bsd.own.mk", line 478: MK_LIBCPLUSPLUS can't be set by a user. >> >> FreeBSD 9.1 seems to ship with clang 3.1 but the ports would bring it to >> 3.2. If I'm building the library manually, which clang version is >> sufficient? >> >> In case libcxxrt isn't needed, here are the configure calls for -make and >> -base. gnustep-make is built and installed with gmake and gmake install >> (run as root). >> >> export CC=/usr/local/bin/clang >> export CXX=${CC} >> ( >> cd core/make >> ./configure \ >> --with-layout=gnustep \ >> --with-objc-lib-flag=-l:libobjc.so.4.6 \ >> CC=${CC} CXX=${CXX} >> gmake >> gmake install # as root >> ) >> export GNUSTEP_CONFIG_FILE=/etc/GNUstep.conf >> . /usr/GNUstep/System/Library/Makefiles/GNUstep.sh >> ( >> cd core/base >> ./configure \ >> --with-layout=gnustep \ >> CC=${CC} CXX=${CXX} >> ) >> >> configure:13164: checking whether objc really works >> configure:13194: /usr/local/bin/clang -o conftest -g -O2 \ >> -I/usr/GNUstep/System/Library/Headers -I/usr/GNUstep/Local/Library/Headers >> \ >> -I/usr/local/include \ >> -fgnu-runtime -x objective-c \ >> -L/usr/GNUstep/System/Library/Libraries >> -L/usr/GNUstep/Local/Library/Libraries -L/usr/local/lib \ >> conftest.c \ >> -lrt -lpthread -rdynamic -pthread \ >> -fobjc-nonfragile-abi -fgnu-runtime \ >> -L/home/frank/GNUstep/Library/Libraries >> -L/usr/GNUstep/Local/Library/Libraries \ >> -L/usr/GNUstep/System/Library/Libraries -L/usr/local/lib \ >> -l:libobjc.so.4.6 -lm >> >> In file included from conftest.c:99: >> In file included from ././config/config.objc.m:2: >> ././config/objc-common.g:53:3: warning: assignment to Objective-C's isa is >> deprecated in favor of object_setClass() [-Wdeprecated-objc-isa-usage] >> obj->isa = self; >> ^ ~~~~~~~ >> object_setClass( , ) >> ././config/objc-common.g:46:5: note: instance variable is declared here >> id isa; >> ^ >> 1 warning generated. >> /usr/local/lib/libobjc.so.4.6: undefined reference to `vtable for >> std::type_info' >> /usr/local/lib/libobjc.so.4.6: undefined reference to >> `std::type_info::__is_function_p() const' >> /usr/local/lib/libobjc.so.4.6: undefined reference to `typeinfo for >> std::type_info' >> /usr/local/lib/libobjc.so.4.6: undefined reference to >> `std::type_info::~type_info()' >> /usr/local/lib/libobjc.so.4.6: undefined reference to >> `std::type_info::__do_upcast(__cxxabiv1::__class_type_info const*, void**) >> const' >> /usr/local/lib/libobjc.so.4.6: undefined reference to >> `std::type_info::__is_pointer_p() const' >> clang-3.4: error: linker command failed with exit code 1 (use -v to see >> invocation) >> >> _______________________________________________ >> Gnustep-dev mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/gnustep-dev > >
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