From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29340 invoked by alias); 13 Jan 2009 16:26:59 -0000 Received: (qmail 28988 invoked by uid 48); 13 Jan 2009 16:26:50 -0000 Date: Tue, 13 Jan 2009 16:26:00 -0000 Subject: [Bug c++/38828] New: g++ 4.3.2: -O2 without -fno-inline-small-functions makes some template instantiations disappear X-Bugzilla-Reason: CC Message-ID: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "ronan dot lehy at probayes dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2009-01/txt/msg01362.txt.bz2 I'm compiling the attached source and inspecting symbols in it: g++-4.3 -v -save-temps -Wall -Wextra -O2 -fno-inline-small-functions mylib.cpp -c -o mylib.o nm mylib.o | c++filt | grep 'serialize<' With -O2 -fno-inline-small-functions (as above), nm gives (as expected): 00000000 W void boost::serialization::serialize(boost::archive::xml_iarchive&, A&, unsigned int) 00000000 W void boost::serialization::serialize(boost::archive::xml_iarchive&, B&, unsigned int) 00000000 W void boost::serialization::serialize(boost::archive::xml_oarchive&, A&, unsigned int) 00000000 W void boost::serialization::serialize(boost::archive::xml_oarchive&, B&, unsigned int) With just -O2, some symbols are missing: 00000000 W void boost::serialization::serialize(boost::archive::xml_iarchive&, B&, unsigned int) 00000000 W void boost::serialization::serialize(boost::archive::xml_oarchive&, B&, unsigned int) The disappearing functions are explicit template instantiations, that are not marked static, or inline. With g++-4.1 and g++-4.2, no symbols are missing. The g++ output follows. Using built-in specs. Target: i486-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.3.2-1ubuntu11' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-targets=all --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu Thread model: posix gcc version 4.3.2 (Ubuntu 4.3.2-1ubuntu11) COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-O2' '-c' '-o' 'mylib.o' '-shared-libgcc' '-mtune=generic' /usr/lib/gcc/i486-linux-gnu/4.3.2/cc1plus -E -quiet -v -D_GNU_SOURCE mylib.cpp -D_FORTIFY_SOURCE=2 -mtune=generic -Wall -Wextra -O2 -fpch-preprocess -o mylib.ii ignoring nonexistent directory "/usr/local/include/i486-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/i486-linux-gnu/4.3.2/../../../../i486-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/include/c++/4.3 /usr/include/c++/4.3/i486-linux-gnu /usr/include/c++/4.3/backward /usr/local/include /usr/lib/gcc/i486-linux-gnu/4.3.2/include /usr/lib/gcc/i486-linux-gnu/4.3.2/include-fixed /usr/include/i486-linux-gnu /usr/include End of search list. COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-O2' '-c' '-o' 'mylib.o' '-shared-libgcc' '-mtune=generic' /usr/lib/gcc/i486-linux-gnu/4.3.2/cc1plus -fpreprocessed mylib.ii -quiet -dumpbase mylib.cpp -mtune=generic -auxbase-strip mylib.o -O2 -Wall -Wextra -version -fstack-protector -o mylib.s GNU C++ (Ubuntu 4.3.2-1ubuntu11) version 4.3.2 (i486-linux-gnu) compiled by GNU C version 4.3.2, GMP version 4.2.2, MPFR version 2.3.2. GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: dc8f858cacda993dd8f70837f0d9565d COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-O2' '-c' '-o' 'mylib.o' '-shared-libgcc' '-mtune=generic' as -V -Qy -o mylib.o mylib.s GNU assembler version 2.18.93 (i486-linux-gnu) using BFD version (GNU Binutils for Ubuntu) 2.18.93.20081009 COMPILER_PATH=/usr/lib/gcc/i486-linux-gnu/4.3.2/:/usr/lib/gcc/i486-linux-gnu/4.3.2/:/usr/lib/gcc/i486-linux-gnu/:/usr/lib/gcc/i486-linux-gnu/4.3.2/:/usr/lib/gcc/i486-linux-gnu/:/usr/lib/gcc/i486-linux-gnu/4.3.2/:/usr/lib/gcc/i486-linux-gnu/ LIBRARY_PATH=/usr/lib/gcc/i486-linux-gnu/4.3.2/:/usr/lib/gcc/i486-linux-gnu/4.3.2/:/usr/lib/gcc/i486-linux-gnu/4.3.2/../../../../lib/:/lib/../lib/:/usr/lib/../lib/:/usr/lib/gcc/i486-linux-gnu/4.3.2/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-O2' '-c' '-o' 'mylib.o' '-shared-libgcc' '-mtune=generic' -- Summary: g++ 4.3.2: -O2 without -fno-inline-small-functions makes some template instantiations disappear Product: gcc Version: 4.3.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ronan dot lehy at probayes dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38828