[Bug regression/67415] New: [5.1/5.2 Regression] -mcpu= breaks -print-file-name for ARM crosscompilers

[Bernhard.Rosenkranzer at linaro dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67415

            Bug ID: 67415
           Summary: [5.1/5.2 Regression] -mcpu= breaks -print-file-name
                    for ARM crosscompilers
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: regression
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Bernhard.Rosenkranzer at linaro dot org
  Target Milestone: ---

If -mcpu=anything is specified on the gcc command line, -print-file-name stops
looking in the compiler's armv7-a library subdirectories.

$ gcc-5.2/bin/arm-linux-androideabi-gcc -print-file-name=libatomic.a
/MYPREFIX/gcc-5.2/bin/../lib/gcc/arm-linux-androideabi/5.2.1/../../../../arm-linux-androideabi/lib/armv7-a/libatomic.a

works as expected, but:

$ gcc-5.2/bin/arm-linux-androideabi-gcc -mcpu=cortex-a9
-print-file-name=libatomic.a
libatomic.a
$ gcc-5.2/bin/arm-linux-androideabi-gcc -mcpu=generic-armv7-a
-print-file-name=libatomic.a
libatomic.a

4.9 behaves as expected, 5.1 and 5.2 don't find the library.