[Bug ld/14904] New: Poor linker plugin DSO error detection

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14904

             Bug #: 14904
           Summary: Poor linker plugin DSO error detection
           Product: binutils
           Version: 2.24 (HEAD)
               URL: http://sourceware.org/ml/binutils/2012-11/msg00356.htm
                    l
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: address@hidden
        ReportedBy: address@hidden
    Classification: Unclassified


For a bad liblto_plugin.so, we got

address@hidden gcc]$  ./xgcc -B./ -flto /tmp/x.c     
/export/build/gnu/binutils/build-x86_64-linux/ld/ld-new: ./liblto_plugin.so:
error in plugin cleanup (ignored)
/export/build/gnu/binutils/build-x86_64-linux/ld/ld-new: ./liblto_plugin.so:
error loading plugin
collect2: error: ld returned 1 exit status
address@hidden gcc]$ 

instead of

address@hidden gcc]$  ./xgcc -B./ -flto /tmp/x.c     
/usr/local/bin/ld: error loading plugin: ./liblto_plugin.so: undefined symbol:
foo
collect2: error: ld returned 1 exit status
address@hidden gcc]$ 

Another case:

address@hidden gcc]$  ./xgcc -B./ -flto /tmp/x.c     
/export/build/gnu/binutils/build-x86_64-linux/ld/ld-new: ./liblto_plugin.so:
error in plugin cleanup (ignored)
/export/build/gnu/binutils/build-x86_64-linux/ld/ld-new: ./liblto_plugin.so:
error loading plugin
collect2: error: ld returned 1 exit status
address@hidden gcc]$ 

instead of

address@hidden gcc]$  ./xgcc -B./ -flto /tmp/x.c     
/usr/local/bin/ld: error loading plugin: ./liblto_plugin.so: undefined symbol:
_onload
collect2: error: ld returned 1 exit status
address@hidden gcc]$ 

A patch is posted at

http://sourceware.org/ml/binutils/2012-11/msg00356.html

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