INSTALL_TARGET=install-strip runs into "permission denied"

[Tijl Coosemans]

On Sun, 18 Jan 2015 12:18:27 +0100 (CET) Gerald Pfeifer <gerald at pfeifer.com> wrote:
> The ports q/a framework has been suggesting this for a while, so 
> I added INSTALL_TARGET=install-strip to lang/gcc5/Makefile.
> 
> Using install-strip for vanilla GCC builds (from source, outside
> the FreeBSD Ports framework) works just fine.
> 
> In the context of Ports this runs into a permission problem since
> install sets binaries to r-x, at which point strip then fails.
> 
> Here is the build log:
> 
> install   -m 555 fixinc.sh .../prefix/gcc5/libexec/gcc5/gcc/i386-portbld-freebsd10.1/5.0.0/install-tools/fixinc.sh
> install  -s  -m 555 fixincl .../prefix/gcc5/libexec/gcc5/gcc/i386-portbld-freebsd10.1/5.0.0/install-tools/fixincl
> install   -m 555 mkheaders .../prefix/gcc5/libexec/gcc5/gcc/i386-portbld-freebsd10.1/5.0.0/install-tools/mkheaders
> test -z 'strip' || strip .../prefix/gcc5/libexec/gcc5/gcc/i386-portbld-freebsd10.1/5.0.0/install-tools/fixincl
> strip: unable to copy file '.../prefix/gcc5/libexec/gcc5/gcc/i386-portbld-freebsd10.1/5.0.0/install-tools/fixincl'; reason: Permission denied
> Makefile:191: recipe for target 'install-strip' failed
> gmake[3]: *** [install-strip] Error 1

This strip command seems redundant.  Isn't fixincl already stripped by
the "install -s" command above?

What does this piece of the log look like outside the ports framework?