[Bug driver/21055] New: Option -Wl,-wrap when no input file

[Bug driver/21055] New: Option -Wl,-wrap when no input file

[bitmap at pan dot homelinux dot com]

Why there is no 'input file error' when using -Wl,-wrap ? 
 
$ gcc -shared -o champion.so                                                     
gcc: no input files 
$ gcc -shared -o champion.so -Wl,-wrap -Wl,toto 
$ ld -shared -o champion.so -wrap toto 
ld: no input files

-- 
           Summary: Option -Wl,-wrap when no input file
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: driver
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bitmap at pan dot homelinux dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: Reading specs from /usr/lib/gcc/i486-linux/3.4.4/specs
                    Configur
  GCC host triplet: Linux
GCC target triplet: gcc (GCC) 3.4.4 20050314 (prerelease) (Debian 3.4.3-12)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21055

[Bug driver/21055] Option -Wl,-wrap when no input file

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-16 13:10 -------
$ gcc -shared -o champion.so -Wl,-wrap -Wl,toto 

Because we add -lgcc -lc and others, so this is not a bug at all.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
  GCC build triplet|Reading specs from          |Reading specs from
                   |/usr/lib/gcc/i486-          |/usr/lib/gcc/i486-
                   |linux/3.4.4/specs           |linux/3.4.4/specsConfigur
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21055

[Bug driver/21055] Option -Wl,-wrap when no input file

[wilson at gcc dot gnu dot org]

------- Additional Comments From wilson at gcc dot gnu dot org  2005-04-19 20:09 -------
This is due to an internal implementation detail.  The -Wl options are handled
by pretending that the argument to the -Wl option is an object file name.  This
works because the only thing we do with object file names on the command line is
to pass them to the linker.  Search gcc.c for "-Wl", and note that the code
increments n_infiles.  Once n_infiles has been incremented, it is impossible for
the gcc driver to tell whether or not the user has specified any input files.

This is clearer without the other arguments.
aretha$ gcc
gcc: no input files
aretha$ gcc -Wl,-wrap
/usr/lib64/gcc-lib/x86_64-suse-linux/3.3.3/../../../../lib64/crt1.o(.text+0x21):
In function `_start':
../sysdeps/x86_64/elf/start.S:92: undefined reference to `main'
collect2: ld returned 1 exit status

The -Xlinker/-Xassembler/-Xpreprocessor options have the same problem.  

Incidentally, -Xassembler/-Xpreprocessor can't possibly work, as they aren't
supposed to be passing options to the linker.  It looks like they have never
worked.  The original patch from Apple has the same bug.  This probably deserves
another bug report.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21055

[Bug driver/21055] Option -Wl,-wrap when no input file

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-19 05:15 -------
But this problem with -Wl,-wrap is really invalid as we treat all -Wl, as input files and unknown to what 
GCC the driver should do.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
  GCC build triplet|Reading specs from          |
                   |/usr/lib/gcc/i486-          |
                   |linux/3.4.4/specsConfigur   |
   GCC host triplet|Linux                       |
 GCC target triplet|gcc (GCC) 3.4.4 20050314    |i486-pc-linux-gnu
                   |(prerelease) (Debian 3.4.3- |
                   |12)                         |
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21055