81881 - jprof fails to link, undefined symbol _r_debug

Status: RESOLVED FIXED

(SeaMonkey :: General, defect)

Description

[Chris McAfee]

linux, rh62, this used to build ok.

c++ -I/usr/X11R6/include -fno-rtti -fno-exceptions -Wall -Wconversion
-Wpointer-arith -Wbad-function-cast -Wcast-align -Woverloaded-virtual -Wsynth
-pedantic -Wno-long-long -pipe -pthread -O  -DNDEBUG -DTRIMMED -shared -Wl,-h
-Wl,libjprof.so -Wl,-Bsymbolic -o libjprof.so -o libjprof.so libmalloc.o
libmalloc.o: In function `DumpAddressMap(void)':
libmalloc.o(.text+0xfe): undefined reference to `_r_debug'
collect2: ld returned 1 exit status
gmake: *** [libjprof.so] Error 1

Comment 1

[Chris McAfee]

hmm, libc change?  adding cls.

Comment 2

[cls]

Got me.  Adding jlnance.

Comment 3

[jim_nance]

What are the configure options?  In particular is the lea allocator being used?

Comment 4

[Chris McAfee]

Hi Jim!  My configure options are as follows:

./configure --with-extensions=all --enable-optimize --disable-debug --enable-jpr
of --enable-eazel-profiler

not sure about lea allocator, but I think that's another option
I'm not using.

Comment 5

[jim_nance]

OK I looked at this some more today.  The _r_debug is a symbol that is used to
interface between the dynamic loader and the debugger.  It looks like someone
has modified jprof to use this interface to get symbol names (ie, I did not do
it so I dont know exactly whats going on).  I found that if you remove the
-Wl,-Bsymbolic from the compile line that this error goes away.  I think that
may be a bug with binutils.  I know what -Bsymbolic does and I dont see whay it
would create unresolved symbols in a shared library.  Actually I dont see how
you can ever get unresolved symbols in a shared lib but I may need to think
about it some more.

In any even, as a short term workaround, just go into the directory and run the
command that failed by hand, removing the -Wl-Bsymbolic flag.  Then start the
build again and everything should be happy.  I am going to try and figure out a
long term fix

Comment 6

[cls]

-Bsymbolic has been removed from the build.  Marking fixed.