src/gnu/lib/libstdc++, branch stable/10

MFC r257532 (by adrian):

2013-12-30T20:15:46+00:00

Fix this build for clang.

MFC r259730:

To avoid having to explicitly test COMPILER_TYPE for setting
clang-specific or gcc-specific flags, introduce the following new
variables for use in Makefiles:

CFLAGS.clang
CFLAGS.gcc
CXXFLAGS.clang
CXXFLAGS.gcc

In bsd.sys.mk, these get appended to the regular CFLAGS or CXXFLAGS for
the right compiler.

MFC r259913:

For libstand and sys/boot, split off gcc-only flags into CFLAGS.gcc.

MFC r259927:

Fix pc98 build, by also forcing COMPILER_TYPE in sys/boot/pc98/boot2's
Makefile.

Pointy hat to:	dim

After r255321, clang uses libc++ by default. This leads to a lot of

2013-09-12T21:24:59+00:00

errors when you enable WITH_GNUCXX to build libstdc++, since it will
include C++ headers from the libc++ installation under ${WORLDTMP}, and
those are not compatible with libstdc++ at all.

To fix this, add -stdlib=libstdc++ to CXXFLAGS when building libstdc++
(and its companion libsupc++) with clang.

Approved by:	re (delphij)

Teach libstdc++ about logl(3).

2013-08-13T20:28:21+00:00

The logl(3) family of functions were implemented in r251292.
Define them in libstdc++'s configuration so they can be used.

Reviewed by:	dim

Regenerate libstdc++'s config.h, synchronizing it with our current

2013-02-15T23:12:35+00:00

almost-C99 headers.

MFC after:	1 week

Add compiler support for the ARM EABI.

2013-01-17T05:56:28+00:00

ARM EABI support is disabled by default and can be enabled by setting
WITH_ARM_EABI when building, however only the kernel-toolchain target will
work with this flag until the rest of the support is added.

For building GNU libstdc++ and libsupc++, filter out libc++-specific and

2012-10-23T18:57:20+00:00

-std= flags above c++98 or gnu++98 from CXXFLAGS *after* including
bsd.lib.mk, otherwise some additions to CXXFLAGS done in bsd.*.mk might
not be preserved.

MFC after:	1 week

For building libstdc++ and libsupc++, filter out any -stdlib=libc++

2012-08-25T23:08:24+00:00

option from CXXFLAGS, otherwise these libraries will not build.
Similarly, filter out any -std=xxx options that aren't supported.

Submitted by:	Yamaya Takashi 
MFC after:	2 weeks

Turn on TLS support for arm on here as it is supported since r231618/

2012-06-14T20:27:28+00:00

r231619 and working since r233106.

Make libsupc++ build as a shared library and make libstdc++ a filter library

2012-03-31T14:25:12+00:00

for it.

This allows people to swap out libsupc++ for libcxxrt easily, so we can begin
the libstdc++ -> libc++ migration.

Approved by:	dim (mentor)

When one attempts to compile the tree with -march=i386, which also used

2011-11-06T14:07:23+00:00

to be gcc's default before r198344, calls to atomic builtins will not be
expanded inline.  Instead, they will be generated as calls to external
functions (e.g. __sync_fetch_and_add_N), leading to linking errors later
on.

Put in a seatbelt that disables use of atomic builtins in libstdc++ and
llvm, when tuning specifically for the real i386 CPU.  This does not
protect against all possible issues, but it is better than nothing.