Hi folks, I've got a test Java class with a single native method. The native method lives in a C++ shared library and is implemented with gcj's CNI. The lib compiles fine and a Linux shared object file is created. The java class compiles fine into an object file, but when linking the executable the linker complains about undefined references to a hidden alias:
de/dbt/simplelibclient/SimpleCPPLib.o:(.data.rel+0xc): undefined reference to `hidden alias for de::dbt::simplelibclient::SimpleCPPLib::square(int)' de/dbt/simplelibclient/SimpleCPPLib.o:(.data.rel+0x68): undefined reference to `hidden alias for de::dbt::simplelibclient::SimpleCPPLib::square(int)' When linking directly to the object file - SimpleCPPLib.o - the library consists of and not the library - libSimpleCPPLib.so - itself, an executable is created without errors. (Don't be confused about SimpleCPPLib.o. There are two of them. The Java class compiles to a SimpleCPPLib.o and the C++ class implementing the native method also compiles to a SimpleCPPLib.o.) I put all relevant files into a tar archive "simplecpplib_sample.tar.bz2" attached to this mailing list mail (is it possible to attach a file to a bugzilla report?): http://sources.redhat.com/ml/binutils/2007-03/msg00321.html I can reproduce problem - on an Athlon-XP system running openSUSE 10.2 - on a Pentium-Core2-Duo system running openSUSE 10.2 - on an Athlon-XP system running Kubuntu 6.1 products used - gcc/gcj 4.1.2 (on all systems) - binutils 2.17 (on all systems) - glibc 2.5 (on all systems) - Linux kernel 2.6.18.8 (on openSUSE Athlon-XP system) I also reproduced the problem (on the openSUSE Athlon-XP system) with - gcc/gcj 4.1.2 built from the current release sources (with and without --enable-bootstrap configure option) - gcc/gcj 4.2.0 from the snapshot sources of 2007/03/07 - binutils 2.17 built from the current release sources I also tested different compiler optimizations when building gcc/gcj and binutils - -O2 -march=athlon-xp -mmmx -m3dnow -msse -mfpmath=sse - -O2 -m486 - -O2 which seems to have no effect Thanks in advance. -- Summary: hidden alias not found while linking gcj compiled Java class with native C++ lib and CNI binding under Linux x86 Product: binutils Version: 2.17 Status: NEW Severity: normal Priority: P2 Component: ld AssignedTo: unassigned at sources dot redhat dot com ReportedBy: mail at andreas-buergel dot de CC: bug-binutils at gnu dot org GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://sourceware.org/bugzilla/show_bug.cgi?id=4266 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. _______________________________________________ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
