[Bug driver/69754] New: --print-{file,prog}-name don't work for liblto_plugin.so

[glebfm at altlinux dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69754

            Bug ID: 69754
           Summary: --print-{file,prog}-name don't work for
                    liblto_plugin.so
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: glebfm at altlinux dot org
                CC: amker.cheng at gmail dot com, unassigned at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64,arm,aarch64

Created attachment 37656
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37656&action=edit
proposed fix

+++ This bug was initially created as a clone of Bug #62290 +++

$ gcc -print-file-name=liblto_plugin.so
liblto_plugin.so
$ gcc -print-prog-name=liblto_plugin.so
liblto_plugin.so

gcc -print-prog-name checks for X_OK, but liblto_plugin.so is not executable:
-rw-r--r-- /usr/libexec/gcc/x86_64-alt-linux/5/liblto_plugin.so.0.0.0

The problem is that liblto_plugin.so is installed into $(libexecdir) which is
intended for executable files. The correct location is inside $(libdir) along
with other non-executable files.