[Bug ld/6753] In a prefixed install, -L order is not respected when searching for -l<libname>, but -T fixes it

[hjl dot tools at gmail dot com]

------- Additional Comments From hjl dot tools at gmail dot com  2008-07-24 
14:21 -------
(In reply to comment #10)
> (In reply to comment #9)
> > (In reply to comment #8)
> > > > 
> > > > You have a very strange setup. You better come up with a testcase
> > > > which doesn't require me to copy things into /usr/lib.
> > > 
> > > so, don't copy. change the name libmylib.so to libcwait.so. Or pick 
> > > another
> > > library name which is in /usr/lib and use that. Only condition is binutils
needs
> > > to be installed in a prefix and the same library needs to be present in
> > > $PREFIX/usr/lib/ and /usr/lib and with "-L$PREFIX/usr/lib -L/usr/lib", ld 
> > > will
> > > just pick the one form /usr/lib.
> > 
> > Please provide a testcase I can try.
> > 
> 
> The bug reproduces only in a prefixed environment. And if you have a prefixed
> binutils install, the steps mentioned by me should reproduce the problem:
> 
> 1. run the script
> 2. cd /tmp/mydir
> 3 gcc -shared -o libcwait.so mysymbol.o
> 4 mv libcwait.so $PREFIX/usr/lib/libcwait.so
> 5. gcc -o mymain mymain.o -L$PREFIX/usr/lib -L/usr/lib -lcwait
> 
> You can use any other name for library. It should be already present in 
> /usr/lib.
> 
> The link will fail with undefined symbol.
> 
> This is the minimal I can do. The bug is pretty obvious in prefix env.

I can't reproduce it. I configured binutils with

--prefix=$HOME/bugs/binutils/6753/usr

bash-3.2$ make
gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -I. -fPIC   -c -o
mysymbol.o mysymbol.c
gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -shared -o libcrypt.so
mysymbol.o
gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -I.   -c -o mymain.o
mymain.c
gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -o foo mymain.o -lcrypt
-L/export/home/hjl/bugs/binutils/6753/usr/usr/lib
bash-3.2$ ls -l /export/home/hjl/bugs/binutils/6753/usr/usr/lib
total 4
-rwxr-xr-x 1 hjl hjl 4000 2008-07-24 07:14 libcrypt.so
bash-3.2$ gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -o foo
mymain.o -lcrypt -L/export/home/hjl/bugs/binutils/6753/usr/usr/lib
bash-3.2$ gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -o foo
mymain.o -lcrypt -L/export/home/hjl/bugs/binutils/6753/usr/lib
mymain.o: In function `main':
mymain.c:(.text+0x12): undefined reference to `mysymbol'
collect2: ld returned 1 exit status
bash-3.2$ mv usr/usr/lib/libcrypt.so usr/lib
bash-3.2$ gcc -m32 -B/export/home/hjl/bugs/binutils/6753/usr/bin/ -o foo
mymain.o -lcrypt -L/export/home/hjl/bugs/binutils/6753/usr/lib
bash-3.2$ 



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WORKSFORME


http://sourceware.org/bugzilla/show_bug.cgi?id=6753

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