[LLVMbugs] [Bug 1611] New: llvm-ld cannot link when compiled with -fvisibility-hidden

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=1611

           Summary: llvm-ld cannot link when compiled with -fvisibility-
                    hidden
           Product: tools
           Version: trunk
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: llvm-ld
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: hs4233 at mail.mn-solutions.de
                CC: llvmbugs at cs.uiuc.edu


I compiled two files like this:

$ /usr/src/llvm/dist/bin/llvm-gcc -c -pipe --emit-llvm -fvisibility=hidden \
  -Wall -W -Wno-pointer-sign -Wextra -Wno-sign-compare -O2 \
  -D_REENTRANT -DNDEBUG -DLITTLE_ENDIAN=1 -DQT_NO_DEBUG \
  -DQT_THREAD_SUPPORT -DQT_SHARED -DQT_TABLET_SUPPORT \
  -I/usr/share/qt3/mkspecs/default -I. -I.. -I../../../include/qt3 -I.obj/ \
  -o .obj/conf.o ../lib5250/conf.c
$ /usr/src/llvm/dist/bin/llvm-g++ -c -pipe --emit-llvm -fvisibility=hidden \
  -Wall -W -Wextra -Wno-sign-compare -O2 \
  -D_REENTRANT -DNDEBUG -DLITTLE_ENDIAN=1 -DQT_NO_DEBUG \
  -DQT_THREAD_SUPPORT -DQT_SHARED -DQT_TABLET_SUPPORT \
  -I/usr/share/qt3/mkspecs/default -I. -I.. -I../../../include/qt3 -I.obj/ \
  -o .obj/configwriter.o ../configwriter.cpp

and linked the resulting files with this:

$ /usr/src/llvm/dist/bin/llvm-ld -v -stats -native -O1 -strip-all \
  -o main .obj/conf.o .obj/configwriter.o \
  -L/usr/share/qt3/lib -L/usr/X11R6/lib \
  -lcrypto -lusb -lutil -lqt-mt -lXext -lX11 -lm -lpthread
  Linking bitcode file '.obj/conf.o'
  Linked in file '.obj/conf.o'
  Linking bitcode file '.obj/configwriter.o'
llvm-ld: error: Cannot link file '.obj/configwriter.o': Linking functions
named 'strcmp': symbols have different visibilities!

The same error doesn't happen when I omit the -fvisibility-hidden compiler
command switch.


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