[Bug ld/22948] New: Modify ld search path to match libxxx.lib

[ryan.gl.scott at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22948

            Bug ID: 22948
           Summary: Modify ld search path to match libxxx.lib
           Product: binutils
           Version: 2.27
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: ryan.gl.scott at gmail dot com
                CC: tnfchris at sourceware dot org
  Target Milestone: ---
            Target: mingw32

According to https://sourceware.org/binutils/docs/ld/WIN32.html for Windows the
standard shared library search order is:


```
For instance, when ld is called with the argument ‘-lxxx’ it will attempt to
find, in the first directory of its search path,

libxxx.dll.a
xxx.dll.a
libxxx.a
xxx.lib
cygxxx.dll (*)
libxxx.dll
xxx.dll
```

Could the search path be changed to

```
libxxx.dll.a
xxx.dll.a
libxxx.a
xxx.lib
libxxx.lib <-- new
cygxxx.dll (*)
libxxx.dll
xxx.dll
```

This way projects like PostgreSQL, which name their import libraries libpq.lib,
will use the import library instead of trying to link to libpq.dll directly
which, due to its imagebase outside the 4gb range, will end up truncating the
R_X86_64_PC32 relocation.

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