[Bug ld/25747] New: Give more helpful diagnostic when users try to link to foo.a with -lfoo

[jwakely.gcc at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25747

            Bug ID: 25747
           Summary: Give more helpful diagnostic when users try to link to
                    foo.a with -lfoo
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: jwakely.gcc at gmail dot com
  Target Milestone: ---

It seems pretty common for beginners to name an archive foo.a and then expect
-lfoo to find it.

If a link fails to find anything matching a -lfoo option, it might be useful to
search again with a different set of filename patterns. If foo.a or foo.so is
found, tell the user that they either need to rename the library or use -l:

i.e. instead of:

$ gcc src.c -L/path/to -lfoo
/usr/bin/ld: cannot find -lfoo
collect2: error: ld returned 1 exit status

print something like:

/usr/bin/ld: cannot find -lfoo
note: to link with /path/to/foo.a use -l:foo.a or rename it to libfoo.a
collect2: error: ld returned 1 exit status

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