Re: ld is broken

["H. J. Lu" <hjl at lucon dot org>]

On Tue, Oct 08, 2002 at 07:00:33AM -0700, H. J. Lu wrote:
> I got
> 
> mipsel-linux-gcc -O2  -DPURE_TERMINFO -DSVR4_CURSES  -o ncurses ../obj_s/ncurses.o -L../lib -lform -lmenu -lpanel -lncurses    -Wl,-rpath,/export/redhat/rpms/BUILD/ncurses-5.2/lib  
> /export/tools/lib/gcc-lib/mipsel-linux/2.96/collect2 -dynamic-linker /lib/ld.so.1 -o ncurses /export/tools/lib/gcc-lib/mipsel-linux/2.96/../../../../mipsel-linux/lib/crt1.o /export/tools/lib/gcc-lib/mipsel-linux/2.96/../../../../mipsel-linux/lib/crti.o /export/tools/lib/gcc-lib/mipsel-linux/2.96/crtbegin.o -L../lib -L/export/tools/lib/gcc-lib/mipsel-linux/2.96 -L/export/tools/lib/gcc-lib/mipsel-linux/2.96/../../../../mipsel-linux/lib ../obj_s/ncurses.o -lform -lmenu -lpanel -lncurses -rpath /export/redhat/rpms/BUILD/ncurses-5.2/lib -lgcc -lc -lgcc /export/tools/lib/gcc-lib/mipsel-linux/2.96/crtend.o /export/tools/lib/gcc-lib/mipsel-linux/2.96/../../../../mipsel-linux/lib/crtn.o
> /export/tools/lib/gcc-lib/mipsel-linux/2.96/../../../../mipsel-linux/bin/ld: input file ncurses is also the output file!
> collect2: ld returned 1 exit status
> 
> I will try to write a testcase for it.
> 

This patch

http://sources.redhat.com/ml/binutils/2002-10/msg00129.html

is almost completely bogus. For one thing, the error message is very
much misleading. There is no such a input file `ncurses' above. Also it
doesn't check symlinks/hardlinks. Many targets, like Linux, may open
some files for read implicitly via DT_NEEDED. I'd like to revert it
now.

To do it right, you have to check every open against the output. Also
comparing filename is not enough in that case.


H.J.