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   ctype(3): Actually conditionalize guard page on shared libc.

   Apparently we build the libc .o files with -fPIC too (I guess this is
   so that libc.a works in position-independent executables? but why
   don't they just use libc_pic.a?), so use a purpose-built cpp macro
   _CTYPE_DYNAMIC for this instead of using __PIC__.

   Now this shows the right symbol sizes:

   $ readelf -s ctype_.pico | grep _C_ctype_tab_guarded_
        3: 0000000000000000  4610 OBJECT  LOCAL  DEFAULT   11 _C_ctype_tab_guarded_
   $ readelf -s ctype_.po | grep _C_ctype_tab_guarded_
        3: 0000000000000000   514 OBJECT  LOCAL  DEFAULT    7 _C_ctype_tab_guarded_
   $ readelf -s ctype_.o | grep _C_ctype_tab_guarded_
        3: 0000000000000000   514 OBJECT  LOCAL  DEFAULT    7 _C_ctype_tab_guarded_

   PR lib/58208: ctype(3) provides poor runtime feedback of abuse

   libc: fix typo in comments: NO_SRSC -> NO_SRCS

   Add a new test for PR kern/56713 and set to expected_failure for now.

   membar_ops(3): Add some automatic tests.

   These tests run two threads for five seconds each to try to trigger
   races in the event of broken memory barriers.  They run only on
   machines with at least two CPUs; on uniprocessor systems there's no
   point -- the membars can correctly just be (instruction barrier)
   no-ops.

   citrus SUBDIR is gone

   Add ACL support for FFS. From FreeBSD.

   Merge changes from current as of 20200406

   Add tests for missing libc catalog entries

   Sync with HEAD

   Add ATF tests for atomic_ops(3).

   Sync with HEAD

   Resolve a couple of conflicts (result of the uimin/uimax changes)

   Restrict -fno-sanitize=function to Clang/LLVM only

   The base GCC version 6,x does not support this option.

   Register micro-UBSan ATF tests in the distribution

   Populate distrib files, mtree lists and add the entry in Makefile to
   include the new code.

   Disable sanitization of -fsanitize=function in libc

   Generated code for the checks (in at least libunwind) depends on the C++
   runtime feature of RTTI.

   Pass -fno-sanitize=function to LIBCSANITIZERFLAGS.

   Sync with HEAD.  77 conflicts resolved - all of them $NetBSD$

   Drop the USE_LIBTRE build option

   libtre cannot be used any more as a replacement for regex(3).
   Tt does not build and the library development is stalled in upstream.

   Proposed on mailing list.

   Sponsored by <The NetBSD Foundation>

   Pull up following revision(s) (requested by martin in ticket #843):
        lib/libc/Makefile: revision 1.169 via patch
   Only create and install the tags file for the normal libc (not any of the
   compat copies), because we don't want it to be overwritten by the compat
   copies. This was detected by the evbarm mkimage complaining.

   Only create and install the tags file for the normal libc (not any of the
   compat copies), because we don't want it to be overwritten by the compat
   copies. This was detected by the evbarm mkimage complaining.

   Include compat in rumprun libc

   Not including non-renamed symbols in libc caused all kinds of configure
   scripts to do the wrong thing when they just tested linkage without
   including headers.  So, go for the "least moving parts" bandaid for now.

   Add hooks for RUMPRUN build of libc

   If "yes", does the following (default "no"):
     * prevents ASM syscalls from being built (librump provides syscalls)
     * does not include compat (useless when application is linked with libc)
     * does not build tags (no /var/db to install them to)
     * does not include tls

   ==> libc for rumprun can now be built against unmodified NetBSD sources

   Rebase to HEAD as of a few days ago.

   MKCOMPAT fixes for when compat MACHINE_CPU != normal MACHINE_CPU

   sync with head.

   for a reference, the tree before this commit was tagged
   as yamt-pagecache-tag8.

   this commit was splitted into small chunks to avoid
   a limitation of cvs.  ("Protocol error: too many arguments")

   sync with head.

   for a reference, the tree before this commit was tagged
   as yamt-pagecache-tag8.

   this commit was splitted into small chunks to avoid
   a limitation of cvs.  ("Protocol error: too many arguments")

   sync with head.

   for a reference, the tree before this commit was tagged
   as yamt-pagecache-tag8.

   this commit was splitted into small chunks to avoid
   a limitation of cvs.  ("Protocol error: too many arguments")

   Introduce GENASSYM_CPPFLAGS for options during genassym processing.
   Consistently drop assembler flags.

   Add a link-time test for __sync_* primitives (see PR 48368) - this
   will allow us to notice missing functions during the build, instead
   of when compiling arbitrary pkgsrc stuff later.

   Include compiler-rt in libc, libm and libkern.

   If MKREPRO=yes, make the tags file refer to /usr/src
   instead of referring to the actual source directory ${NETBSDSRC}.

   Use a separate variable for the use of GCC's unwind code.