LTO: Prevent -flto exposing csu internals when linking v2.

Userland applications should not see what is happening in these sources,
let alone have behavioural changes for -fxxx flags during linking.

LTO: Prevent -flto exposing csu internals when linking v2.

Userland applications should not see what is happening in these sources,
let alone have behavioural changes for -fxxx flags during linking.

Also make sure -flto does *not* get near any of crt1 stuff.
Caused lost os version elf notes in utilities and even segfaults in pkg(8).

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Initial import of binutils 2.22 on the new vendor branch

Future versions of binutils will also reside on this branch rather
than continuing to create new binutils branches for each new version.

csu: move crt files to /usr/lib

Instead of installing our start files in gcc directories, install the
generic ones in /usr/lib. This should make porting other compilers more
easy.

Requested-by:

csu: move crt files to /usr/lib

Instead of installing our start files in gcc directories, install the
generic ones in /usr/lib. This should make porting other compilers more
easy.

Requested-by: hasso@

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Don't define USED_FOR_TARGET on the command line.

This produces all kinds of side effects, ultimately leading to the csu
sources and the compiler being out of sync on compilation, thus triggering
an

Don't define USED_FOR_TARGET on the command line.

This produces all kinds of side effects, ultimately leading to the csu
sources and the compiler being out of sync on compilation, thus triggering
an internal compiler error.

Details for the curious and for historical purposes:
Our gcc is configured to work with a ld which can merge ro and rw sections
to rw sections. Nevertheless cc1 will enforce sections in one unit to be
of one type or the other, i.e. it disallows section flag changes. Sections
are usually a compiler internal detail, so a flag change is considered a
compiler bug and thus cc1 aborts with an internal compiler error on such
occasions.

The csu libs consider themselves as part of the compiler and use section
declarations. However if the lib and the compiler don't agree on some
settings and are out of sync, the lib will decide to create a rw .eh_frame
section (by not declaring a variable constant). If the compiler uses the
.eh_frame section as well, like gcc41/amd64 does to store dwarf2 exception
rollback information, the above mentioned internal compiler error is
triggered.

The essential problem here was that USED_FOR_TARGET will prevent the
auto-host.h/dragonfly-native.h config.h-style headers to set the necessary
compiler configuration which is also used by the csu libs. By moving it
to the place where the gcc people intended it to be, everything works as
desired.

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Create startup files from the GCC sources and drop our versions.
This places the startup files into the GCC specific lib dir. A short
overview is given in lib/csu/README.

This fixes issues with gcc

Create startup files from the GCC sources and drop our versions.
This places the startup files into the GCC specific lib dir. A short
overview is given in lib/csu/README.

This fixes issues with gcc41 and static binaries.

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csu: Adjust some flags etc. to more closely resemble the vendor Makefile.

Also, use ${PICFLAG} instead of -fpic.

Submitted-by: John Marino <draco@marino.st>

gnu/lib/csu: Add -fno-asynchronous-unwind-tables to the CFLAGS.

Quoth FreeBSD's commit msg:

Often reported issue with newer ld is:
error in /usr/lib/crtendS.o(.eh_frame); no .eh_frame_hdr table wil

gnu/lib/csu: Add -fno-asynchronous-unwind-tables to the CFLAGS.

Quoth FreeBSD's commit msg:

Often reported issue with newer ld is:
error in /usr/lib/crtendS.o(.eh_frame); no .eh_frame_hdr table will
be created.

The issue is that crtend is compiled with unwind table, and also it
places the special CIE into the .eh_frame indicating the end of
section, that is located before generated unwind table. New ld has
assertion that verifies that closing CIE is indeed the last CIE,
causing the crypting message to be issued, and refusing to generate
dwarf unwind.

Add -fno-asynchronous-unwind-tables to disable unwind table generation
for crtbegin/crtend.

Taken-from: FreeBSD

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