[Bug libffi/64855] New: FAIL: libffi.call/* -W -Wall -Wno-psabi -O0 -DABI_NUM=* -DABI_ATTR=* execution test on x86_64-apple-darwin*

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64855

            Bug ID: 64855
           Summary: FAIL: libffi.call/*  -W -Wall -Wno-psabi -O0
                    -DABI_NUM=* -DABI_ATTR=* execution test on
                    x86_64-apple-darwin*
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libffi
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: doko at gcc dot gnu.org, howarth at bromo dot med.uc.edu,
                    iains at gcc dot gnu.org, rth at gcc dot gnu.org
              Host: x86_64-apple-darwin*
            Target: x86_64-apple-darwin*
             Build: x86_64-apple-darwin*

After r220158 all the lib tests of the kind 'libffi.call/*  -W -Wall -Wno-psabi
-O0 -DABI_NUM=* -DABI_ATTR=*' fail on x86_64-apple-darwin*: see
https://gcc.gnu.org/ml/gcc-testresults/2015-01/msg03329.html.

While these failures are exposed by r220158, they were for new tests introduced
by r219477.

Note that trying to run struct5.exe compiled with

/opt/gcc/build_w/gcc/xgcc -B/opt/gcc/build_w/gcc/
/opt/gcc/work/libffi/testsuite/libffi.call/struct5.c -W -Wall -Wno-psabi -O2
-DABI_NUM=FFI_STDCALL -DABI_ATTR=__STDCALL__
-I/opt/gcc/build_w/x86_64-apple-darwin14.1.0/i386/libffi/include
-I/opt/gcc/work/libffi/include
-I/opt/gcc/build_w/x86_64-apple-darwin14.1.0/i386/libffi/
-L/opt/gcc/build_w/x86_64-apple-darwin14.1.0/i386/libffi/.libs
-L/opt/gcc/build_w/x86_64-apple-darwin14.1.0/i386/libstdc++-v3/src/.libs
-Wl,-allow_stack_execute -shared-libgcc -lffi -lm -m32 -o ./struct5.exe

gives

dyld: Library not loaded: /opt/gcc/gcc4.10w/lib/i386/libffi.4.dylib
  Referenced from:
/Users/dominiq/Documents/Fortran/g95bench/win/f90/bug/struct5.exe
  Reason: image not found
Trace/BPT trap

First I don't understand why /opt/gcc/build_w/gcc/xgcc -B/opt/gcc/build_w/gcc/
refers to my install directory.

Second, I don't find any libffi library in my install directories under
x86_64-apple-darwin14 (4.8 to 5.0), while I found them for
x86_64-apple-darwin10 and 4.8 (r209181).

Is this intended?