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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