src/gnu/lib/libssp/libssp_nonshared/Makefile, branch main

Remove gcclibs libssp build glue

2020-01-07T19:49:31+00:00

r356356 started providing libssp based on ^/lib/libc/secure and disconnected
this version from the build. This one did formally provide runtime support
for _FORTIFY_SOURCE, but FreeBSD lacks the build support that would have
been needed to take advantage of it.

MFC after:	never

Convert gnu to using SRCTOP

2017-03-12T18:59:16+00:00

Prefer SRCTOP over CURDIR/../../contrib, etc. However, retain the "up
one level" instances of ../ because they are really relative to this
part of the tree and not a means to find the root of the tree. As
such, it's better to leave them since that further the goal of being
able to move directories if watned to in the future.

Differential Revision:	https://reviews.freebsd.org/D9932
Sponsored by:		Netflix
Silence	On:		arch@ (twice)

Spell NO_PROFILE= as MK_PROFILE=no.

2014-04-25T19:25:26+00:00

Second attempt at eliminating .text relocations in shared libraries

2009-07-14T21:19:13+00:00

compiled with stack protector.

Use libssp_nonshared library to pull __stack_chk_fail_local symbol into
each library that needs it instead of pulling it from libc. GCC
generates local calls to this function which result in absolute
relocations put into position-independent code segment, making dynamic
loader do extra work every time given shared library is being relocated
and making affected text pages non-shareable.

Reviewed by:        kib
Approved by:        re (kib)

Back out previous revision until better tested fix is ready.

2009-06-29T01:33:59+00:00

Approved by: re (impliciti, by approving previos check-in)

Eliminate .text relocations in shared libraries compiled with stack protector.

2009-06-28T23:51:39+00:00

Use libssp_nonshared library to pull __stack_chk_fail_local symbol into
each library that needs it instead of pulling it from libc. GCC generates
local calls to this function which result in absolute relocations put into
position-independent code segment, making dynamic loader do extra work everys
time given shared library is being relocated and making affected text pages
non-shareable.

Reviewed by:        kib
Approved by:        re (kensmith)

Update bmake glue to build GCC 4.2.

2007-05-19T04:25:59+00:00

Also:
        Switch FreeBSD to use libgcc_s.so.1.

        Use dl_iterate_phdr to locate shared objects' exception frame
        info instead of depending on older register_frame_info machinery.
        This allows us to avoid depending on libgcc_s.so.1 in binaries
        that do not use exception handling directly. As an additional
        benefit it breaks circular libc <=> libgcc_s.so.1 dependency too.

        Build newly added libgomp.so.1 library, the runtime support
        bits for OpenMP.

        Build LGPLed libssp library. Our libc provides our own
        BSD-licensed SSP callbacks implementation, so this library
        is only built to benefit applications that have hadcoded
        knowledge of libssp.so and libssp_nonshared.a. When linked
        in from command line, these libraries override libc
        implementation.