K 10
svn:author
V 6
gerald
K 8
svn:date
V 27
2017-11-14T14:05:47.403063Z
K 7
svn:log
V 1095
Make sure what we install is stripped (i.e., debug info is removed).

The straightforward way is setting INSTALL_TARGET to install-strip,
which is supported by the upstream GCC build machinery.

Unfortunately this fails when running as regular user (non-root)
since strip requires write permission to the files in question,
and we install binaries as r-xr-xr-x by default.  To work around
that we need to set BINMODE to allow for write access by the user,
something that's common on GNU/Linux (which is why this probably
has not been noticed there).  This is not necessary when running
as root.

(A different approach suggested was to set STRIP=true, alas that
leads to many files actually not being stripped.  This is due to
GCC using its own script install-sh that in turn uses cp, chmod,
strip,...  instead of our own install-* tools in many cases.)

According to tests by sobomax@ and me installs of lang/gcc6 went
down by about a fourth.

Reported by:	Ports QA Framework, miwi, sobomax
Discussed with:	tijl, miwi
Tested by:	sobomax
Differential Revision:	https://reviews.freebsd.org/D10357

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