src/gnu/lib/libgcc, branch releng/11.0

MFC r303396: rename ARM's libunwind.S to to avoid conflict with llvm libunwind

2016-08-01T20:02:59Z

llvm libunwind includes a libunwind.cpp, but on ARM libunwind.S is found first in .PATH. Rename the latter one, since it is not going to be updated again. Approved by: re (kib)

MFC libunwind improvements

2016-07-22T17:34:28Z

r302450: libunwind: update to upstream snapshot r272680 The key improvement is that it may be built without cross-unwinding support, which significantly reduces the stack space requirement. r302456: libunwind: enable only the native unwinder by default This significantly reduces stack space requirements, and runtimes require only native unwinding. r302475: libunwind: limit stack usage in unwind cursor This may be reworked upstream but in the interim should address the stack usage issue reported in the PR. r303016: llvm-libunwind: use conventional (non-Darwin) X86 register numbers For historical reasons Darwin/i386 has ebp and esp swapped in the eh_frame register numbering. That is: Darwin Other Reg # eh_frame eh_frame DWARF ===== ======== ======== ===== 4 ebp esp esp 5 esp ebp ebp Although the UNW_X86_* constants are not supposed to be coupled to DWARF / eh_frame numbering they are currently conflated in LLVM libunwind, and thus we require the non-Darwin numbering. PR: 206384 Approved by: re (kib) Sponsored by: The FreeBSD Foundation

Follow-up r297842: Rework header generation to fix always rebuilding.

2016-04-18T18:13:58Z

This reworks the handling of common headers to just include the needed logic rather than invoke MAKE. This avoids the problem listed in r297842 and avoids other dependency tracking issues. Pointyhat to: bdrewery Reported by: Nikolai Lifanov Sponsored by: EMC / Isilon Storage Division

MFH

2016-04-12T17:00:13Z

META_MODE: Avoid changed build command every build.

2016-04-12T02:45:19Z

Because the file is generated with -f using another Makefile, 2 different Makefiles are trying to handle the .meta file for the target. The obvious .NOMETA_CMP or .NOMETA on the ${MAKE} targets don't work as they are very limited in scope in bmake. Using .PHONY fixes the problem and ensures that the ${MAKE} command is always ran to check if it is outdated in the sub-make. An example of the problem in gnu/lib/libgcc (with make -dM): /usr/obj/root/git/freebsd/gnu/lib/libgcc/tm.h.meta: 2: a build command has changed TARGET_CPU_DEFAULT="" HEADERS="options.h i386/biarch64.h i386/i386.h i386/unix.h i386/att.h dbxelf.h elfos-undef.h elfos.h freebsd-native.h freebsd-spec.h freebsd.h i386/x86-64.h i386/freebsd.h i386/freebsd64.h defaults.h" DEFINES="" /bin/sh /root/git/freebsd/gnu/lib/libgcc/../../../contrib/gcc/mkconfig.sh tm.h vs (cd /root/git/freebsd/gnu/lib/libgcc; make -f /root/git/freebsd/gnu/lib/libgcc/../../usr.bin/cc/cc_tools/Makefile MFILE=/root/git/freebsd/gnu/lib/libgcc/../../usr.bin/cc/cc_tools/Makefile GCCDIR=/root/git/freebsd/gnu/lib/libgcc/../../../contrib/gcc tm.h) Skipping meta for tm.h: .NOMETA (cd /root/git/freebsd/gnu/lib/libgcc; make -f /root/git/freebsd/gnu/lib/libgcc/../../usr.bin/cc/cc_tools/Makefile MFILE=/root/git/freebsd/gnu/lib/libgcc/../../usr.bin/cc/cc_tools/Makefile GCCDIR=/root/git/freebsd/gnu/lib/libgcc/../../../contrib/gcc tm.h) `tm.h' is up to date. Sponsored by: EMC / Isilon Storage Division

MFH

2016-03-02T16:14:46Z

OBJS and POBJS have not been used since r215127.

2016-02-24T22:27:18Z

r215127 disabled building of libgcc.a. MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division

Don't hide AR command as bsd.lib.mk's r283925 changed as well.

2016-02-24T21:19:44Z

MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division

DIRDEPS_BUILD: Regenerate without local dependencies.

2016-02-24T17:20:11Z

These are no longer needed after the recent 'beforebuild: depend' changes and hooking DIRDEPS_BUILD into a subset of FAST_DEPEND which supports skipping 'make depend'. Sponsored by: EMC / Isilon Storage Division

Remove libc, librtld_db, libthr packages, and further increase

2016-02-05T21:01:08Z

the constraints on what needs to be installed in a specific to maintain consistency during upgrades. Create a new clibs package containing libraries that are needed as a bare minimum for consistency. With much help and input from: kib Sponsored by: The FreeBSD Foundation