Update Gnulib to the latest git version

This patch allows us to remove a workaround in common-defs.h due to
the gnulib fix in:
https://lists.gnu.org/archive/html/bug-gnulib/2019-11/msg00024.html

All of GDB's local Gnulib patches were already fixed upstream per their
descriptions, so this patch removes them all.

The problem listed here:
https://sourceware.org/ml/gdb-patches/2019-08/msg00553.html
was probably partially fixed by moving gnulib to the toplevel;
for the remainder, I am setting MAKEOVERRIDES to empty in
gnulib/Makefile.am.  See also the comment there (it fixes an issue
with compilers that don't use C99/C11 by default such as GCC 4.8.5,
the default on Centos 7).

gdb/ChangeLog:

2019-12-16  Christian Biesinger  <cbiesinger@google.com>

	* gdbsupport/common-defs.h: Remove workaround for a gnulib bug
	(we no longer need to include time.h before pathmax.h)

gnulib/ChangeLog:

2019-12-16  Christian Biesinger  <cbiesinger@google.com>

	* Makefile.am: Set MAKEOVERRIDES.
	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* config.in: Regenerate.
	* configure: Regenerate.
	* import/Makefile.am: Update.
	* import/Makefile.in: Regenerate.
	* import/_Noreturn.h: New file.
	* import/alloca.c (i00afunc): Update.
	* import/alloca.in.h (if): Update.
	* import/arg-nonnull.h: Rename from import/extra/snippet/arg-nonnull.h.
	* import/arpa_inet.in.h (if): Update.
	* import/assure.h: Update.
	* import/at-func.c: Update.
	* import/basename-lgpl.c: Update.
	* import/canonicalize-lgpl.c (if): Update.
	* import/c++defs.h: Rename from import/extra/snippet/c++defs.h.
	* import/cdefs.h: New file.
	* import/chdir-long.c: Update.
	* import/chdir-long.h: Update.
	* import/cloexec.c: Update.
	* import/cloexec.h: Update.
	* import/close.c: Update.
	* import/closedir.c: Update.
	* import/config.charset: Remove.
	* import/dirent-private.h: Update.
	* import/dirent.in.h: Update.
	* import/dirfd.c: Update.
	* import/dirname-lgpl.c: Update.
	* import/dirname.h (base_name): Update.
	* import/dosname.h (if): Update.
	* import/dup-safer-flag.c: New file.
	* import/dup-safer.c: Update.
	* import/dup.c: Update.
	* import/dup2.c (if): Update.
	(dup2_nothrow): Update.
	(ms_windows_dup2): Update.
	* import/errno.in.h (if): Update.
	(elif): Update.
	* import/error.c (if): Update.
	(strerror_r): Update.
	(program_name): Update.
	(error): Update.
	(error_at_line): Update.
	* import/error.h: Update.
	* import/exitfail.c: Update.
	* import/exitfail.h: Update.
	* import/extra/config.rpath: Update.
	* import/extra/snippet/_Noreturn.h: Remove.
	* import/extra/update-copyright: Update.
	* import/fchdir.c: Update.
	* import/fcntl.c (rpl_fcntl): Update.
	(INCL_DOS): Update.
	(if): Update.
	(rpl_fcntl_DUPFD): Update.
	(rpl_fcntl_DUPFD_CLOEXEC): Update.
	(klibc_fcntl): Update.
	(fcntl): Update.
	(have_dupfd_cloexec): Update.
	* import/fcntl.in.h (if): Update.
	(creat): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(_GL_WARN_ON_USE): Update.
	(O_CLOEXEC): Update.
	(GNULIB_defined_O_CLOEXEC): Update.
	* import/fd-hook.c: Update.
	* import/fd-hook.h: Update.
	* import/fd-safer-flag.c: New file.
	* import/fd-safer.c: Update.
	* import/fdopendir.c: Update.
	* import/filename.h: Update.
	* import/filenamecat-lgpl.c (longest_relative_suffix): Update.
	(mfile_name_concat): Update.
	* import/filenamecat.h: Update.
	* import/flexmember.h: Update.
	* import/float+.h: Update.
	* import/float.c: Update.
	* import/float.in.h (LDBL_MIN): Update.
	* import/fnmatch.c (__builtin_expect): Update.
	(FALLTHROUGH): Update.
	* import/fnmatch.in.h (_FNMATCH_H): Update.
	(_): Update.
	(fnmatch): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(_GL_FUNCDECL_SYS): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(_GL_WARN_ON_USE): Update.
	* import/fnmatch_loop.c (FCT): Update.
	(EXT): Update.
	* import/fpucw.h (GET_FPUCW): Update.
	(SET_FPUCW): Update.
	* import/frexp.c: Update.
	* import/frexpl.c: Update.
	* import/fstat.c (stat): Update.
	(fstat): Update.
	(WINDOWS_NATIVE): Update.
	(fstat_nothrow): Update.
	(WIN32_LEAN_AND_MEAN): Update.
	* import/fstatat.c (normal_fstatat): Update.
	(rpl_fstatat): Update.
	* import/getcwd-lgpl.c (rpl_getcwd): Update.
	* import/getcwd.c (getcwd_nothrow): Update.
	(getcwd_system): Update.
	(__getcwd): Update.
	* import/getdtablesize.c (if): Update.
	(_setmaxstdio): Update.
	(_setmaxstdio_nothrow): Update.
	(getdtablesize): Update.
	* import/getlogin_r.c (if): Update.
	(getlogin_r): Update.
	* import/getprogname.c (getprogname): Update.
	* import/getprogname.h: Update.
	* import/gettext.h (if): Update.
	* import/gettimeofday.c (WINDOWS_NATIVE): Update.
	(localtime): Update.
	(GetProcAddress): Update.
	(gmtime): Update.
	(void): Update.
	(struct tm): Update.
	(rpl_localtime): Update.
	(initialize): Update.
	(rpl_gmtime): Update.
	(tzset): Update.
	(rpl_tzset): Update.
	* import/glob-libc.h (_Restrict_): Update.
	(__size_t): Update.
	(__need_size_t): Update.
	(glob): Update.
	(globfree): Update.
	(__REDIRECT_NTH): Update.
	(glob64): Update.
	(globfree64): Update.
	(glob_pattern_p): Update.
	* import/glob.c (POSIX): Update.
	(if): Update.
	(__set_errno): Update.
	(getpwnam_r): Update.
	(__lstat64): Update.
	(FLEXIBLE_ARRAY_MEMBER): Update.
	(__glob_pattern_p): Update.
	(GETPW_R_SIZE_MAX): Update.
	(GET_LOGIN_NAME_MAX): Update.
	(DT_UNKNOWN): Update.
	(DT_DIR): Update.
	(DT_LNK): Update.
	(D_TYPE_TO_RESULT): Update.
	(readdir_result_might_be_symlink): Update.
	(readdir_result_might_be_dir): Update.
	(readdir_result_type): Update.
	(D_INO_TO_RESULT): Update.
	(READDIR_RESULT_INITIALIZER): Update.
	(attribute_hidden): Update.
	(__attribute_noinline__): Update.
	(__builtin_expect): Update.
	(__glibc_unlikely): Update.
	(__has_builtin): Update.
	(__glob_pattern_type): Update.
	(is_dir): Update.
	(glob): Update.
	(globfree): Update.
	(libc_hidden_def): Update.
	(DIRSEP_CHAR): Update.
	(prefix_array): Update.
	(weak_alias): Update.
	(link_exists2_p): Update.
	(link_exists_p): Update.
	(glob_in_dir): Update.
	(GLOBNAMES_MEMBERS): Update.
	* import/glob.in.h (_GL_GLOB_H): Update.
	(_): Update.
	(__BEGIN_DECLS): Update.
	(__END_DECLS): Update.
	(_Restrict_): Update.
	(__THROW): Update.
	(__THROWNL): Update.
	(__size_t): Update.
	(__USE_GNU): Update.
	(glob): Update.
	(globfree): Update.
	(glob_pattern_p): Update.
	(__glob_pattern_p): Update.
	(__GLOB_GNULIB): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(_GL_FUNCDECL_SYS): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_WARN_ON_USE): Update.
	* import/glob_internal.h: New file.
	* import/glob_pattern_p.c: New file.
	* import/globfree.c: New file.
	* import/glthread/lock.c (glthread_rwlock_init_for_glibc): Update.
	(glthread_rwlock_rdlock_multithreaded): Update.
	(glthread_once_call): Update.
	(glthread_once_multithreaded): Update.
	(glthread_once_singlethreaded): Update.
	(glthread_recursive_lock_init_multithreaded): Update.
	(glthread_recursive_lock_lock_multithreaded): Update.
	(glthread_recursive_lock_unlock_multithreaded): Update.
	(glthread_recursive_lock_destroy_multithreaded): Update.
	(glthread_lock_init_func): Update.
	(glthread_lock_lock_func): Update.
	(glthread_lock_unlock_func): Update.
	(glthread_lock_destroy_func): Update.
	(gl_waitqueue_t): Update.
	(gl_waitqueue_init): Update.
	(gl_waitqueue_add): Update.
	(gl_waitqueue_notify_first): Update.
	(gl_waitqueue_notify_all): Update.
	(glthread_rwlock_init_func): Update.
	(glthread_rwlock_rdlock_func): Update.
	(glthread_rwlock_wrlock_func): Update.
	(glthread_rwlock_unlock_func): Update.
	(glthread_rwlock_destroy_func): Update.
	(glthread_recursive_lock_init_func): Update.
	(glthread_recursive_lock_lock_func): Update.
	(glthread_recursive_lock_unlock_func): Update.
	(glthread_recursive_lock_destroy_func): Update.
	(glthread_once_func): Update.
	* import/glthread/lock.h (c11_threads_in_use): Update.
	(pthread_in_use): Update.
	(gl_rwlock_initializer): Update.
	(glthread_rwlock_init): Update.
	(glthread_rwlock_init_for_glibc): Update.
	(pth_in_use): Update.
	(gl_lock_define): Update.
	(gl_lock_define_initialized): Update.
	(gl_lock_initializer): Update.
	(glthread_lock_init): Update.
	(glthread_lock_lock): Update.
	(glthread_lock_unlock): Update.
	(glthread_lock_destroy): Update.
	(gl_rwlock_define): Update.
	(gl_rwlock_define_initialized): Update.
	(glthread_rwlock_rdlock): Update.
	(glthread_rwlock_wrlock): Update.
	(glthread_rwlock_unlock): Update.
	(glthread_rwlock_destroy): Update.
	(gl_recursive_lock_define): Update.
	(gl_recursive_lock_define_initialized): Update.
	(gl_recursive_lock_initializer): Update.
	(glthread_recursive_lock_init): Update.
	(glthread_recursive_lock_lock): Update.
	(glthread_recursive_lock_unlock): Update.
	(glthread_recursive_lock_destroy): Update.
	(gl_once_define): Update.
	(glthread_once): Update.
	(glthread_once_multithreaded): Update.
	(glthread_once_singlethreaded): Update.
	(thread_in_use): Update.
	(glthread_recursive_lock_init_multithreaded): Update.
	(glthread_recursive_lock_lock_multithreaded): Update.
	(glthread_recursive_lock_unlock_multithreaded): Update.
	(glthread_recursive_lock_destroy_multithreaded): Update.
	(glthread_lock_init_func): Update.
	(glthread_lock_lock_func): Update.
	(glthread_lock_unlock_func): Update.
	(glthread_lock_destroy_func): Update.
	(glthread_rwlock_init_func): Update.
	(glthread_rwlock_rdlock_func): Update.
	(glthread_rwlock_wrlock_func): Update.
	(glthread_rwlock_unlock_func): Update.
	(glthread_rwlock_destroy_func): Update.
	(glthread_recursive_lock_init_func): Update.
	(glthread_recursive_lock_lock_func): Update.
	(glthread_recursive_lock_unlock_func): Update.
	(glthread_recursive_lock_destroy_func): Update.
	(glthread_once_func): Update.
	* import/glthread/threadlib.c: Update.
	* import/hard-locale.c: Update.
	* import/hard-locale.h: Update.
	* import/inet_ntop.c: Update.
	* import/intprops.h (__has_builtin): Update.
	(_GL_INT_CONVERT): Update.
	(_GL_INT_NEGATE_CONVERT): Update.
	(verify): Update.
	(_GL_HAS_BUILTIN_OVERFLOW): Update.
	(_GL_HAS_BUILTIN_ADD_OVERFLOW): Update.
	(_GL_HAS_BUILTIN_OVERFLOW_P): Update.
	(_GL_HAS_BUILTIN_MUL_OVERFLOW): Update.
	(_GL_BINARY_OP_OVERFLOW): Update.
	(INT_ADD_WRAPV): Update.
	(INT_SUBTRACT_WRAPV): Update.
	(INT_MULTIPLY_WRAPV): Update.
	(_GL_INT_OP_WRAPV): Update.
	(_GL_INT_OP_WRAPV_SMALLISH): Update.
	(_GL_INT_OP_WRAPV_LONGISH): Update.
	(_GL_INT_OP_CALC): Update.
	(_GL_INT_OP_CALC1): Update.
	(_GL_INT_OP_WRAPV_VIA_UNSIGNED): Update.
	(_GL_INT_ADD_RANGE_OVERFLOW): Update.
	(_GL_INT_SUBTRACT_RANGE_OVERFLOW): Update.
	(_GL_INT_MULTIPLY_RANGE_OVERFLOW): Update.
	* import/inttypes.in.h (if): Update.
	* import/isnan.c: Update.
	* import/isnand-nolibm.h: Update.
	* import/isnand.c: Update.
	* import/isnanl-nolibm.h: Update.
	* import/isnanl.c: Update.
	* import/itold.c: Update.
	* import/libc-config.h: New file.
	* import/limits.in.h (LLONG_MIN): Update.
	(LLONG_MAX): Update.
	(ULLONG_MAX): Update.
	(WORD_BIT): Update.
	(LONG_BIT): Update.
	* import/localcharset.c (setlocale): Update.
	(relocate): Update.
	(O_NOFOLLOW): Update.
	(ISSLASH): Update.
	(DIRECTORY_SEPARATOR): Update.
	(getc): Update.
	(volatile): Update.
	(get_charset_aliases): Update.
	(struct table_entry): Update.
	(alias_table_defined): Update.
	(locale_table_defined): Update.
	(locale_charset): Update.
	(if): Update.
	* import/localcharset.h: Update.
	* import/localtime-buffer.c: New file.
	* import/localtime-buffer.h: New file.
	* import/lstat.c (rpl_lstat): Update.
	* import/m4/00gnulib.m4: Update.
	* import/m4/__inline.m4: New file.
	* import/m4/absolute-header.m4: Update.
	* import/m4/alloca.m4: Update.
	* import/m4/arpa_inet_h.m4: Update.
	* import/m4/builtin-expect.m4: New file.
	* import/m4/canonicalize.m4: Update.
	* import/m4/chdir-long.m4: Update.
	* import/m4/close.m4: Update.
	* import/m4/closedir.m4: Update.
	* import/m4/codeset.m4: Update.
	* import/m4/configmake.m4: Remove.
	* import/m4/d-ino.m4: Update.
	* import/m4/d-type.m4: Update.
	* import/m4/dirent_h.m4: Update.
	* import/m4/dirfd.m4: Update.
	* import/m4/dirname.m4: Update.
	* import/m4/double-slash-root.m4: Update.
	* import/m4/dup.m4: Update.
	* import/m4/dup2.m4: Update.
	* import/m4/eealloc.m4: Update.
	* import/m4/environ.m4: Update.
	* import/m4/errno_h.m4: Update.
	* import/m4/error.m4: Update.
	* import/m4/exponentd.m4: Update.
	* import/m4/exponentl.m4: Update.
	* import/m4/extensions.m4: Update.
	* import/m4/extern-inline.m4: Update.
	* import/m4/fchdir.m4: Update.
	* import/m4/fcntl-o.m4: Update.
	* import/m4/fcntl.m4: Update.
	* import/m4/fcntl_h.m4: Update.
	* import/m4/fdopendir.m4: Update.
	* import/m4/filenamecat.m4: Update.
	* import/m4/flexmember.m4: Update.
	* import/m4/float_h.m4: Update.
	* import/m4/fnmatch.m4: Update.
	* import/m4/fnmatch_h.m4: New file.
	* import/m4/fpieee.m4: Update.
	* import/m4/frexp.m4: Update.
	* import/m4/frexpl.m4: Update.
	* import/m4/fstat.m4: Update.
	* import/m4/fstatat.m4: Update.
	* import/m4/getcwd-abort-bug.m4: Update.
	* import/m4/getcwd-path-max.m4: Update.
	* import/m4/getcwd.m4: Update.
	* import/m4/getdtablesize.m4: Update.
	* import/m4/getlogin.m4: New file.
	* import/m4/getlogin_r.m4: Update.
	* import/m4/getpagesize.m4: New file.
	* import/m4/getprogname.m4: Update.
	* import/m4/gettimeofday.m4: Update.
	* import/m4/glibc21.m4: Remove.
	* import/m4/glob.m4: Update.
	* import/m4/glob_h.m4: New file.
	* import/m4/gnulib-cache.m4: Update.
	* import/m4/gnulib-common.m4: Update.
	* import/m4/gnulib-comp.m4: Update.
	* import/m4/gnulib-tool.m4: Update.
	* import/m4/hard-locale.m4: Remove.
	* import/m4/host-cpu-c-abi.m4: New file.
	* import/m4/include_next.m4: Update.
	* import/m4/inet_ntop.m4: Update.
	* import/m4/inttypes-pri.m4: Update.
	* import/m4/inttypes.m4: Update.
	* import/m4/isnand.m4: Update.
	* import/m4/isnanl.m4: Update.
	* import/m4/largefile.m4: Update.
	* import/m4/lib-ld.m4: Update.
	* import/m4/lib-link.m4: Update.
	* import/m4/lib-prefix.m4: Update.
	* import/m4/limits-h.m4: Update.
	* import/m4/localcharset.m4: Update.
	* import/m4/locale-fr.m4: Update.
	* import/m4/locale-ja.m4: Update.
	* import/m4/locale-zh.m4: Update.
	* import/m4/localtime-buffer.m4: New file.
	* import/m4/lock.m4: Update.
	* import/m4/longlong.m4: Update.
	* import/m4/lstat.m4: Update.
	* import/m4/malloc.m4: Update.
	* import/m4/malloca.m4: Update.
	* import/m4/math_h.m4: Update.
	* import/m4/mbrtowc.m4: Update.
	* import/m4/mbsinit.m4: Update.
	* import/m4/mbsrtowcs.m4: Update.
	* import/m4/mbstate_t.m4: Update.
	* import/m4/memchr.m4: Update.
	* import/m4/memmem.m4: Update.
	* import/m4/mempcpy.m4: Update.
	* import/m4/memrchr.m4: Update.
	* import/m4/mkdir.m4: Update.
	* import/m4/mkdtemp.m4: Update.
	* import/m4/mkostemp.m4: Update.
	* import/m4/mmap-anon.m4: Update.
	* import/m4/mode_t.m4: Update.
	* import/m4/msvc-inval.m4: Update.
	* import/m4/msvc-nothrow.m4: Update.
	* import/m4/multiarch.m4: Update.
	* import/m4/netinet_in_h.m4: Update.
	* import/m4/nocrash.m4: Update.
	* import/m4/off_t.m4: Update.
	* import/m4/onceonly.m4: Remove.
	* import/m4/open-cloexec.m4: New file.
	* import/m4/open-slash.m4: New file.
	* import/m4/open.m4: Update.
	* import/m4/openat.m4: Update.
	* import/m4/opendir.m4: Update.
	* import/m4/pathmax.m4: Update.
	* import/m4/pthread_rwlock_rdlock.m4: New file.
	* import/m4/rawmemchr.m4: Update.
	* import/m4/readdir.m4: Update.
	* import/m4/readlink.m4: Update.
	* import/m4/realloc.m4: Update.
	* import/m4/rename.m4: Update.
	* import/m4/rewinddir.m4: Update.
	* import/m4/rmdir.m4: Update.
	* import/m4/save-cwd.m4: Update.
	* import/m4/secure_getenv.m4: Remove.
	* import/m4/setenv.m4: Update.
	* import/m4/signal_h.m4: Update.
	* import/m4/socklen.m4: Update.
	* import/m4/sockpfaf.m4: Update.
	* import/m4/ssize_t.m4: Update.
	* import/m4/stat-time.m4: New file.
	* import/m4/stat.m4: Update.
	* import/m4/std-gnu11.m4: New file.
	* import/m4/stdalign.m4: Update.
	* import/m4/stdbool.m4: Update.
	* import/m4/stddef_h.m4: Update.
	* import/m4/stdint.m4: Update.
	* import/m4/stdio_h.m4: Update.
	* import/m4/stdlib_h.m4: Update.
	* import/m4/strchrnul.m4: Update.
	* import/m4/strdup.m4: Update.
	* import/m4/strerror.m4: Update.
	* import/m4/strerror_r.m4: Update.
	* import/m4/string_h.m4: Update.
	* import/m4/strstr.m4: Update.
	* import/m4/strtok_r.m4: Update.
	* import/m4/sys_socket_h.m4: Update.
	* import/m4/sys_stat_h.m4: Update.
	* import/m4/sys_time_h.m4: Update.
	* import/m4/sys_types_h.m4: Update.
	* import/m4/sys_uio_h.m4: Update.
	* import/m4/tempname.m4: Update.
	* import/m4/threadlib.m4: Update.
	* import/m4/time_h.m4: Update.
	* import/m4/time_r.m4: Update.
	* import/m4/unistd-safer.m4: Update.
	* import/m4/unistd_h.m4: Update.
	* import/m4/warn-on-use.m4: Update.
	* import/m4/wchar_h.m4: Update.
	* import/m4/wchar_t.m4: Update.
	* import/m4/wctype_h.m4: Update.
	* import/m4/wint_t.m4: Update.
	* import/malloc.c: Update.
	* import/malloc/scratch_buffer.h: New file.
	* import/malloc/scratch_buffer_grow.c: New file.
	* import/malloc/scratch_buffer_grow_preserve.c: New file.
	* import/malloc/scratch_buffer_set_array_size.c: New file.
	* import/malloca.c (MAGIC_NUMBER): Update.
	(MAGIC_SIZE): Update.
	(struct preliminary_header): Update.
	(HEADER_SIZE): Update.
	(union header): Update.
	(verify): Update.
	(HASH_TABLE_SIZE): Update.
	(freea): Update.
	* import/malloca.h (malloca): Update.
	(nmalloca): Update.
	* import/malloca.valgrind: Remove.
	* import/math.in.h (_GL_MATH_CXX_REAL_FLOATING_DECL_2): Update.
	(func): Update.
	(rpl_func): Update.
	(f): Update.
	(d): Update.
	(l): Update.
	(_GL_WARN_ON_USE): Update.
	(_GL_WARN_ON_USE_ATTRIBUTE): Update.
	(FP_ILOGB0): Update.
	(FP_ILOGBNAN): Update.
	(acosf): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(asinf): Update.
	(atanf): Update.
	(atan2f): Update.
	(cosf): Update.
	(coshf): Update.
	(expf): Update.
	(expl): Update.
	(expm1l): Update.
	(ilogbl): Update.
	(rintl): Update.
	(sinf): Update.
	(sinhf): Update.
	(sqrtf): Update.
	(tanf): Update.
	(tanhf): Update.
	(isfinite): Update.
	(isinf): Update.
	(isnan): Update.
	(GNULIB_defined_signbit): Update.
	(signbit): Update.
	* import/mbrtowc.c (FALLTHROUGH): Update.
	(locale_enc): Update.
	(locale_enc_cached): Update.
	(gl_lock_define_initialized): Update.
	(mbrtowc): Update.
	* import/mbsinit.c (if): Update.
	(mbsinit): Update.
	* import/mbsrtowcs-impl.h: Update.
	* import/mbsrtowcs-state.c: Update.
	* import/mbsrtowcs.c: Update.
	* import/memchr.c: Update.
	* import/memchr.valgrind: Update.
	* import/memmem.c (__builtin_expect): Update.
	* import/mempcpy.c: Update.
	* import/memrchr.c (__memrchr): Update.
	* import/mkdir.c (if): Update.
	* import/mkdtemp.c: Update.
	* import/mkostemp.c: Update.
	* import/msvc-inval.c: Update.
	* import/msvc-inval.h: Update.
	* import/msvc-nothrow.c: Update.
	* import/msvc-nothrow.h (if): Update.
	* import/netinet_in.in.h: Update.
	* import/open.c (open): Update.
	(if): Update.
	* import/openat-die.c: Update.
	* import/openat-priv.h: Update.
	* import/openat-proc.c: Update.
	* import/openat.c (rpl_openat): Update.
	* import/openat.h: Update.
	* import/opendir.c: Update.
	* import/pathmax.h (if): Update.
	* import/pipe-safer.c: Update.
	* import/rawmemchr.c: Update.
	* import/rawmemchr.valgrind: Update.
	* import/readdir.c (readdir): Update.
	* import/readlink.c: Update.
	* import/realloc.c: Update.
	* import/ref-add.sin: Remove.
	* import/ref-del.sin: Remove.
	* import/rename.c (if): Update.
	* import/rewinddir.c: Update.
	* import/rmdir.c: Update.
	* import/same-inode.h (SAME_INODE): Update.
	* import/save-cwd.c (save_cwd): Update.
	* import/save-cwd.h: Update.
	* import/scratch_buffer.h: New file.
	* import/secure_getenv.c: Remove.
	* import/setenv.c: Update.
	* import/signal.in.h: Update.
	* import/stat-time.c: New file.
	* import/stat-time.h: New file.
	* import/stat-w32.c: New file.
	* import/stat-w32.h: New file.
	* import/stat.c (if): Update.
	(stat): Update.
	(REPLACE_FUNC_STAT_DIR): Update.
	(WINDOWS_NATIVE): Update.
	(WIN32_LEAN_AND_MEAN): Update.
	(is_unc_root): Update.
	(rpl_stat): Update.
	* import/stdalign.in.h (elif): Update.
	* import/stdbool.in.h: Update.
	* import/stddef.in.h (_GL_STDDEF_ALIGNAS): Update.
	(max_align_t): Update.
	(GNULIB_defined_max_align_t): Update.
	* import/stdint.in.h (WINT_MIN): Update.
	(WINT_MAX): Update.
	(_STDINT_MIN): Update.
	(_STDINT_UNSIGNED_MIN): Update.
	(_STDINT_SIGNED_MIN): Update.
	(PTRDIFF_MIN): Update.
	(SIG_ATOMIC_MIN): Update.
	(WCHAR_MIN): Update.
	* import/stdio.in.h (if): Update.
	* import/stdlib.in.h (if): Update.
	(_GL_WARN_ON_USE): Update.
	(_GL_FUNCDECL_SYS): Update.
	(random): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(srandom): Update.
	(initstate): Update.
	(setstate): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(GNULIB_defined_strtod_function): Update.
	(strtold): Update.
	(GNULIB_defined_strtold_function): Update.
	* import/str-two-way.h: Update.
	* import/strchrnul.c: Update.
	* import/strchrnul.valgrind: Update.
	* import/strdup.c: Update.
	* import/streq.h: Update.
	* import/strerror-override.c: Update.
	* import/strerror-override.h: Update.
	* import/strerror.c (strerror): Update.
	* import/strerror_r.c (safe_copy): Update.
	* import/string.in.h (_GL_FUNCDECL_SYS): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(_GL_WARN_ON_USE): Update.
	* import/stripslash.c: Update.
	* import/strnlen1.c: Update.
	* import/strnlen1.h: Update.
	* import/strstr.c (__builtin_expect): Update.
	* import/strtok_r.c: Update.
	* import/sys_socket.in.h (CMSG_SPACE): Update.
	(CMSG_LEN): Update.
	(struct sockaddr_storage): Update.
	(SO_REUSEPORT): Update.
	(_GL_WARN_ON_USE): Update.
	* import/sys_stat.in.h (if): Update.
	(stat): Update.
	(struct stat): Update.
	(st_atime): Update.
	(st_mtime): Update.
	(st_ctime): Update.
	(_GL_WINDOWS_STAT_TIMESPEC): Update.
	(GNULIB_defined_struct_stat): Update.
	(_S_IFBLK): Update.
	(_S_IFLNK): Update.
	(_S_IFSOCK): Update.
	(fstat): Update.
	(fstatat): Update.
	(lstat): Update.
	(stat64): Update.
	(_stat64): Update.
	(_stat32i64): Update.
	(_stati64): Update.
	(_stat32): Update.
	(_stat64i32): Update.
	* import/sys_time.in.h: Update.
	* import/sys_types.in.h (dev_t): Update.
	(GNULIB_defined_dev_t): Update.
	(ino_t): Update.
	(GNULIB_defined_ino_t): Update.
	(_GL_WINDOWS_STAT_INODES): Update.
	(if): Update.
	* import/sys_uio.in.h: Update.
	* import/tempname.c (__secure_getenv): Update.
	(try_nocreate): Update.
	* import/tempname.h: Update.
	* import/time.in.h (tzset): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(_GL_FUNCDECL_SYS): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(ctime): Update.
	(strftime): Update.
	* import/time_r.c: Update.
	* import/unistd--.h: Update.
	* import/unistd-safer.h: Update.
	* import/unistd.in.h (if): Update.
	(elif): Update.
	(__need_getopt): Update.
	(access): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(_GL_WARN_ON_USE): Update.
	(_GL_FUNCDECL_SYS): Update.
	(__declspec): Update.
	(_GL_WARN_ON_USE_ATTRIBUTE): Update.
	(faccessat): Update.
	(getpass): Update.
	(truncate): Update.
	* import/unsetenv.c: Update.
	* import/verify.h (if): Update.
	(_GL_HAVE__STATIC_ASSERT): Update.
	(_GL_HAVE_STATIC_ASSERT): Update.
	(_GL_HAVE__STATIC_ASSERT1): Update.
	(_GL_HAVE_STATIC_ASSERT1): Update.
	(_GL_VERIFY): Update.
	(_Static_assert): Update.
	(_GL_HAS_BUILTIN_TRAP): Update.
	(_GL_HAS_BUILTIN_UNREACHABLE): Update.
	(verify_true): Update.
	(verify): Update.
	(__has_builtin): Update.
	(elif): Update.
	(assume): Update.
	* import/warn-on-use.h: Rename from import/extra/snippet/warn-on-use.h.
	* import/wchar.in.h (if): Update.
	(wcsftime): Update.
	(_GL_FUNCDECL_RPL): Update.
	(_GL_CXXALIAS_RPL): Update.
	(_GL_FUNCDECL_SYS): Update.
	(_GL_CXXALIAS_SYS): Update.
	(_GL_CXXALIASWARN): Update.
	(_GL_WARN_ON_USE): Update.
	* import/wctype.in.h (rpl_iswalnum): Update.
	(rpl_iswalpha): Update.
	(rpl_iswblank): Update.
	(rpl_iswcntrl): Update.
	(rpl_iswdigit): Update.
	(rpl_iswgraph): Update.
	(rpl_iswlower): Update.
	(rpl_iswprint): Update.
	(rpl_iswpunct): Update.
	(rpl_iswspace): Update.
	(rpl_iswupper): Update.
	(rpl_iswxdigit): Update.
	(rpl_towlower): Update.
	(rpl_towupper): Update.
	(iswalnum): Update.
	(iswalpha): Update.
	(iswblank): Update.
	(iswcntrl): Update.
	(iswdigit): Update.
	(iswgraph): Update.
	(iswlower): Update.
	(iswprint): Update.
	(iswpunct): Update.
	(iswspace): Update.
	(iswupper): Update.
	(iswxdigit): Update.
	(towlower): Update.
	(towupper): Update.
	* import/windows-initguard.h: New file.
	* import/windows-mutex.c: New file.
	* import/windows-mutex.h: New file.
	* import/windows-once.c: New file.
	* import/windows-once.h: New file.
	* import/windows-recmutex.c: New file.
	* import/windows-recmutex.h: New file.
	* import/windows-rwlock.c: New file.
	* import/windows-rwlock.h: New file.
	* import/xalloc-oversized.h: New file.
	* patches/0001-Fix-PR-gdb-23558-Use-system-s-getcwd-when-cross-comp.patch: Remove.
	* patches/0002-mkostemp-mkostemps-Fix-compilation-error-in-C-mode-o.patch: Remove.
	* patches/0003-Fix-glob-c-Coverity-issues.patch: Remove.
	* update-gnulib.sh: Update to latest gnulib and don't apply patches
	anymore.  Also updates the patch -p flag to the current directory structure in
	case patches are needed again in the future.

Change-Id: I9c2b07a3046baecfb664e21b2644353ea888dbfa

1 files changed, 323 insertions, 83 deletions

diff --git a/gnulib/import/math.in.h b/gnulib/import/math.in.h
index e1dc970..18f8ff3 100644
--- a/gnulib/import/math.in.h
+++ b/gnulib/import/math.in.h
@@ -1,6 +1,6 @@
 /* A GNU-like <math.h>.
 
-   Copyright (C) 2002-2003, 2007-2016 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2007-2019 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -13,7 +13,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
 #ifndef _@GUARD_PREFIX@_MATH_H
 
@@ -28,6 +28,11 @@
 #ifndef _@GUARD_PREFIX@_MATH_H
 #define _@GUARD_PREFIX@_MATH_H
 
+/* On OpenVMS, NAN, INFINITY, and HUGEVAL macros are defined in <fp.h>.  */
+#if defined __VMS && ! defined NAN
+# include <fp.h>
+#endif
+
 #ifndef _GL_INLINE_HEADER_BEGIN
  #error "Please include config.h first."
 #endif
@@ -62,20 +67,20 @@ _gl_cxx_ ## func ## l (long double l)                               \
 {                                                                   \
   return func (l);                                                  \
 }
-# define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func) \
+# define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func,rpl_func,rettype) \
 _GL_BEGIN_NAMESPACE                                                 \
-inline int                                                          \
-func (float f)                                                      \
+inline rettype                                                      \
+rpl_func (float f)                                                  \
 {                                                                   \
   return _gl_cxx_ ## func ## f (f);                                 \
 }                                                                   \
-inline int                                                          \
-func (double d)                                                     \
+inline rettype                                                      \
+rpl_func (double d)                                                 \
 {                                                                   \
   return _gl_cxx_ ## func ## d (d);                                 \
 }                                                                   \
-inline int                                                          \
-func (long double l)                                                \
+inline rettype                                                      \
+rpl_func (long double l)                                            \
 {                                                                   \
   return _gl_cxx_ ## func ## l (l);                                 \
 }                                                                   \
@@ -87,27 +92,27 @@ _GL_END_NAMESPACE
    classification macros with an argument of real-floating (that is,
    one of float, double, or long double).  */
 #define _GL_WARN_REAL_FLOATING_DECL(func) \
-_GL_MATH_INLINE int                                                 \
-rpl_ ## func ## f (float f)                                         \
-{                                                                   \
-  return func (f);                                                  \
-}                                                                   \
-_GL_MATH_INLINE int                                                 \
-rpl_ ## func ## d (double d)                                        \
-{                                                                   \
-  return func (d);                                                  \
-}                                                                   \
-_GL_MATH_INLINE int                                                 \
-rpl_ ## func ## l (long double l)                                   \
-{                                                                   \
-  return func (l);                                                  \
-}                                                                   \
-_GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - "       \
-                 "use gnulib module " #func " for portability");    \
-_GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - "       \
-                 "use gnulib module " #func " for portability");    \
-_GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - "       \
-                 "use gnulib module " #func " for portability")
+_GL_MATH_INLINE int                                                       \
+_GL_WARN_ON_USE_ATTRIBUTE (#func " is unportable - "                      \
+                           "use gnulib module " #func " for portability") \
+rpl_ ## func ## f (float f)                                               \
+{                                                                         \
+  return func (f);                                                        \
+}                                                                         \
+_GL_MATH_INLINE int                                                       \
+_GL_WARN_ON_USE_ATTRIBUTE (#func " is unportable - "                      \
+                           "use gnulib module " #func " for portability") \
+rpl_ ## func ## d (double d)                                              \
+{                                                                         \
+  return func (d);                                                        \
+}                                                                         \
+_GL_MATH_INLINE int                                                       \
+_GL_WARN_ON_USE_ATTRIBUTE (#func " is unportable - "                      \
+                           "use gnulib module " #func " for portability") \
+rpl_ ## func ## l (long double l)                                         \
+{                                                                         \
+  return func (l);                                                        \
+}
 #define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
   (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value)     \
    : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value)  \
@@ -189,8 +194,17 @@ _NaN ()
 #endif
 
 
-/* Ensure FP_ILOGB0 and FP_ILOGBNAN are defined.  */
-#if !(defined FP_ILOGB0 && defined FP_ILOGBNAN)
+#if defined FP_ILOGB0 && defined FP_ILOGBNAN
+ /* Ensure FP_ILOGB0 and FP_ILOGBNAN are correct.  */
+# if defined __HAIKU__
+  /* Haiku: match what ilogb() does */
+#  undef FP_ILOGB0
+#  undef FP_ILOGBNAN
+#  define FP_ILOGB0   (- 2147483647 - 1) /* INT_MIN */
+#  define FP_ILOGBNAN (- 2147483647 - 1) /* INT_MIN */
+# endif
+#else
+ /* Ensure FP_ILOGB0 and FP_ILOGBNAN are defined.  */
 # if defined __NetBSD__ || defined __sgi
   /* NetBSD, IRIX 6.5: match what ilogb() does */
 #  define FP_ILOGB0   (- 2147483647 - 1) /* INT_MIN */
@@ -212,11 +226,20 @@ _NaN ()
 
 
 #if @GNULIB_ACOSF@
-# if !@HAVE_ACOSF@
-#  undef acosf
+# if @REPLACE_ACOSF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef acosf
+#   define acosf rpl_acosf
+#  endif
+_GL_FUNCDECL_RPL (acosf, float, (float x));
+_GL_CXXALIAS_RPL (acosf, float, (float x));
+# else
+#  if !@HAVE_ACOSF@
+#   undef acosf
 _GL_FUNCDECL_SYS (acosf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (acosf, float, (float x));
+# endif
 _GL_CXXALIASWARN (acosf);
 #elif defined GNULIB_POSIXCHECK
 # undef acosf
@@ -243,11 +266,20 @@ _GL_WARN_ON_USE (acosl, "acosl is unportable - "
 
 
 #if @GNULIB_ASINF@
-# if !@HAVE_ASINF@
-#  undef asinf
+# if @REPLACE_ASINF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef asinf
+#   define asinf rpl_asinf
+#  endif
+_GL_FUNCDECL_RPL (asinf, float, (float x));
+_GL_CXXALIAS_RPL (asinf, float, (float x));
+# else
+#  if !@HAVE_ASINF@
+#   undef asinf
 _GL_FUNCDECL_SYS (asinf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (asinf, float, (float x));
+# endif
 _GL_CXXALIASWARN (asinf);
 #elif defined GNULIB_POSIXCHECK
 # undef asinf
@@ -274,11 +306,20 @@ _GL_WARN_ON_USE (asinl, "asinl is unportable - "
 
 
 #if @GNULIB_ATANF@
-# if !@HAVE_ATANF@
-#  undef atanf
+# if @REPLACE_ATANF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef atanf
+#   define atanf rpl_atanf
+#  endif
+_GL_FUNCDECL_RPL (atanf, float, (float x));
+_GL_CXXALIAS_RPL (atanf, float, (float x));
+# else
+#  if !@HAVE_ATANF@
+#   undef atanf
 _GL_FUNCDECL_SYS (atanf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (atanf, float, (float x));
+# endif
 _GL_CXXALIASWARN (atanf);
 #elif defined GNULIB_POSIXCHECK
 # undef atanf
@@ -305,11 +346,20 @@ _GL_WARN_ON_USE (atanl, "atanl is unportable - "
 
 
 #if @GNULIB_ATAN2F@
-# if !@HAVE_ATAN2F@
-#  undef atan2f
+# if @REPLACE_ATAN2F@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef atan2f
+#   define atan2f rpl_atan2f
+#  endif
+_GL_FUNCDECL_RPL (atan2f, float, (float y, float x));
+_GL_CXXALIAS_RPL (atan2f, float, (float y, float x));
+# else
+#  if !@HAVE_ATAN2F@
+#   undef atan2f
 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
+# endif
 _GL_CXXALIASWARN (atan2f);
 #elif defined GNULIB_POSIXCHECK
 # undef atan2f
@@ -348,7 +398,9 @@ _GL_WARN_ON_USE (cbrtf, "cbrtf is unportable - "
 _GL_FUNCDECL_SYS (cbrt, double, (double x));
 # endif
 _GL_CXXALIAS_SYS (cbrt, double, (double x));
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (cbrt);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef cbrt
 # if HAVE_RAW_DECL_CBRT
@@ -416,7 +468,9 @@ _GL_CXXALIAS_RPL (ceil, double, (double x));
 # else
 _GL_CXXALIAS_SYS (ceil, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (ceil);
+# endif
 #endif
 
 #if @GNULIB_CEILL@
@@ -446,6 +500,7 @@ _GL_WARN_ON_USE (ceill, "ceill is unportable - "
 
 #if @GNULIB_COPYSIGNF@
 # if !@HAVE_DECL_COPYSIGNF@
+#  undef copysignf
 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
 # endif
 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
@@ -463,7 +518,9 @@ _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
 # endif
 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (copysign);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef copysign
 # if HAVE_RAW_DECL_COPYSIGN
@@ -488,11 +545,20 @@ _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
 
 
 #if @GNULIB_COSF@
-# if !@HAVE_COSF@
-#  undef cosf
+# if @REPLACE_COSF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef cosf
+#   define cosf rpl_cosf
+#  endif
+_GL_FUNCDECL_RPL (cosf, float, (float x));
+_GL_CXXALIAS_RPL (cosf, float, (float x));
+# else
+#  if !@HAVE_COSF@
+#   undef cosf
 _GL_FUNCDECL_SYS (cosf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (cosf, float, (float x));
+# endif
 _GL_CXXALIASWARN (cosf);
 #elif defined GNULIB_POSIXCHECK
 # undef cosf
@@ -519,11 +585,20 @@ _GL_WARN_ON_USE (cosl, "cosl is unportable - "
 
 
 #if @GNULIB_COSHF@
-# if !@HAVE_COSHF@
-#  undef coshf
+# if @REPLACE_COSHF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef coshf
+#   define coshf rpl_coshf
+#  endif
+_GL_FUNCDECL_RPL (coshf, float, (float x));
+_GL_CXXALIAS_RPL (coshf, float, (float x));
+# else
+#  if !@HAVE_COSHF@
+#   undef coshf
 _GL_FUNCDECL_SYS (coshf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (coshf, float, (float x));
+# endif
 _GL_CXXALIASWARN (coshf);
 #elif defined GNULIB_POSIXCHECK
 # undef coshf
@@ -535,11 +610,20 @@ _GL_WARN_ON_USE (coshf, "coshf is unportable - "
 
 
 #if @GNULIB_EXPF@
-# if !@HAVE_EXPF@
-#  undef expf
+# if @REPLACE_EXPF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef expf
+#   define expf rpl_expf
+#  endif
+_GL_FUNCDECL_RPL (expf, float, (float x));
+_GL_CXXALIAS_RPL (expf, float, (float x));
+# else
+#  if !@HAVE_EXPF@
+#   undef expf
 _GL_FUNCDECL_SYS (expf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (expf, float, (float x));
+# endif
 _GL_CXXALIASWARN (expf);
 #elif defined GNULIB_POSIXCHECK
 # undef expf
@@ -550,11 +634,20 @@ _GL_WARN_ON_USE (expf, "expf is unportable - "
 #endif
 
 #if @GNULIB_EXPL@
-# if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
-#  undef expl
+# if @REPLACE_EXPL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef expl
+#   define expl rpl_expl
+#  endif
+_GL_FUNCDECL_RPL (expl, long double, (long double x));
+_GL_CXXALIAS_RPL (expl, long double, (long double x));
+# else
+#  if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
+#   undef expl
 _GL_FUNCDECL_SYS (expl, long double, (long double x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (expl, long double, (long double x));
+# endif
 _GL_CXXALIASWARN (expl);
 #elif defined GNULIB_POSIXCHECK
 # undef expl
@@ -593,7 +686,9 @@ _GL_FUNCDECL_SYS (exp2, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (exp2, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (exp2);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef exp2
 # if HAVE_RAW_DECL_EXP2
@@ -664,7 +759,9 @@ _GL_FUNCDECL_SYS (expm1, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (expm1, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (expm1);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef expm1
 # if HAVE_RAW_DECL_EXPM1
@@ -674,11 +771,22 @@ _GL_WARN_ON_USE (expm1, "expm1 is unportable - "
 #endif
 
 #if @GNULIB_EXPM1L@
-# if !@HAVE_DECL_EXPM1L@
-#  undef expm1l
+# if @REPLACE_EXPM1L@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef expm1l
+#   define expm1l rpl_expm1l
+#  endif
+_GL_FUNCDECL_RPL (expm1l, long double, (long double x));
+_GL_CXXALIAS_RPL (expm1l, long double, (long double x));
+# else
+#  if !@HAVE_DECL_EXPM1L@
+#   undef expm1l
+#   if !(defined __cplusplus && defined _AIX)
 _GL_FUNCDECL_SYS (expm1l, long double, (long double x));
-# endif
+#   endif
+#  endif
 _GL_CXXALIAS_SYS (expm1l, long double, (long double x));
+# endif
 _GL_CXXALIASWARN (expm1l);
 #elif defined GNULIB_POSIXCHECK
 # undef expm1l
@@ -764,7 +872,9 @@ _GL_CXXALIAS_RPL (floor, double, (double x));
 # else
 _GL_CXXALIAS_SYS (floor, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (floor);
+# endif
 #endif
 
 #if @GNULIB_FLOORL@
@@ -802,6 +912,7 @@ _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
 # else
 #  if !@HAVE_FMAF@
+#   undef fmaf
 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
 #  endif
 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
@@ -825,11 +936,14 @@ _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
 # else
 #  if !@HAVE_FMA@
+#   undef fma
 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
 #  endif
 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (fma);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef fma
 # if HAVE_RAW_DECL_FMA
@@ -851,8 +965,10 @@ _GL_CXXALIAS_RPL (fmal, long double,
 # else
 #  if !@HAVE_FMAL@
 #   undef fmal
+#   if !(defined __cplusplus && defined _AIX)
 _GL_FUNCDECL_SYS (fmal, long double,
                   (long double x, long double y, long double z));
+#   endif
 #  endif
 _GL_CXXALIAS_SYS (fmal, long double,
                   (long double x, long double y, long double z));
@@ -902,7 +1018,9 @@ _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
 # else
 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (fmod);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef fmod
 # if HAVE_RAW_DECL_FMOD
@@ -985,7 +1103,9 @@ _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
 # else
 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN1 (frexp, double, (double x, int *expptr));
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef frexp
 /* Assume frexp is always declared.  */
@@ -1065,7 +1185,9 @@ _GL_CXXALIAS_RPL (hypot, double, (double x, double y));
 # else
 _GL_CXXALIAS_SYS (hypot, double, (double x, double y));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (hypot);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef hypot
 # if HAVE_RAW_DECL_HYPOT
@@ -1136,7 +1258,9 @@ _GL_FUNCDECL_SYS (ilogb, int, (double x));
 #  endif
 _GL_CXXALIAS_SYS (ilogb, int, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (ilogb);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef ilogb
 # if HAVE_RAW_DECL_ILOGB
@@ -1146,10 +1270,19 @@ _GL_WARN_ON_USE (ilogb, "ilogb is unportable - "
 #endif
 
 #if @GNULIB_ILOGBL@
-# if !@HAVE_ILOGBL@
+# if @REPLACE_ILOGBL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ilogbl
+#   define ilogbl rpl_ilogbl
+#  endif
+_GL_FUNCDECL_RPL (ilogbl, int, (long double x));
+_GL_CXXALIAS_RPL (ilogbl, int, (long double x));
+# else
+#  if !@HAVE_ILOGBL@
 _GL_FUNCDECL_SYS (ilogbl, int, (long double x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (ilogbl, int, (long double x));
+# endif
 _GL_CXXALIASWARN (ilogbl);
 #elif defined GNULIB_POSIXCHECK
 # undef ilogbl
@@ -1239,7 +1372,9 @@ _GL_CXXALIAS_RPL (log, double, (double x));
 # else
 _GL_CXXALIAS_SYS (log, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (log);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef log
 # if HAVE_RAW_DECL_LOG
@@ -1308,7 +1443,9 @@ _GL_CXXALIAS_RPL (log10, double, (double x));
 # else
 _GL_CXXALIAS_SYS (log10, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (log10);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef log10
 # if HAVE_RAW_DECL_LOG10
@@ -1379,7 +1516,9 @@ _GL_FUNCDECL_SYS (log1p, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (log1p, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (log1p);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef log1p
 # if HAVE_RAW_DECL_LOG1P
@@ -1451,7 +1590,9 @@ _GL_FUNCDECL_SYS (log2, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (log2, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (log2);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef log2
 # if HAVE_RAW_DECL_LOG2
@@ -1521,7 +1662,9 @@ _GL_FUNCDECL_SYS (logb, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (logb, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (logb);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef logb
 # if HAVE_RAW_DECL_LOGB
@@ -1589,7 +1732,9 @@ _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
 # else
 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (modf);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef modf
 # if HAVE_RAW_DECL_MODF
@@ -1678,7 +1823,9 @@ _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
 #  endif
 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (remainder);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef remainder
 # if HAVE_RAW_DECL_REMAINDER
@@ -1698,7 +1845,9 @@ _GL_CXXALIAS_RPL (remainderl, long double, (long double x, long double y));
 # else
 #  if !@HAVE_DECL_REMAINDERL@
 #   undef remainderl
+#   if !(defined __cplusplus && defined _AIX)
 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
+#   endif
 #  endif
 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
 # endif
@@ -1731,7 +1880,9 @@ _GL_WARN_ON_USE (rintf, "rintf is unportable - "
 _GL_FUNCDECL_SYS (rint, double, (double x));
 # endif
 _GL_CXXALIAS_SYS (rint, double, (double x));
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (rint);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef rint
 # if HAVE_RAW_DECL_RINT
@@ -1741,10 +1892,19 @@ _GL_WARN_ON_USE (rint, "rint is unportable - "
 #endif
 
 #if @GNULIB_RINTL@
-# if !@HAVE_RINTL@
+# if @REPLACE_RINTL@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef rintl
+#   define rintl rpl_rintl
+#  endif
+_GL_FUNCDECL_RPL (rintl, long double, (long double x));
+_GL_CXXALIAS_RPL (rintl, long double, (long double x));
+# else
+#  if !@HAVE_RINTL@
 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
+# endif
 _GL_CXXALIASWARN (rintl);
 #elif defined GNULIB_POSIXCHECK
 # undef rintl
@@ -1792,7 +1952,9 @@ _GL_FUNCDECL_SYS (round, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (round, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (round);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef round
 # if HAVE_RAW_DECL_ROUND
@@ -1812,7 +1974,9 @@ _GL_CXXALIAS_RPL (roundl, long double, (long double x));
 # else
 #  if !@HAVE_DECL_ROUNDL@
 #   undef roundl
+#   if !(defined __cplusplus && defined _AIX)
 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
+#   endif
 #  endif
 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
 # endif
@@ -1827,11 +1991,20 @@ _GL_WARN_ON_USE (roundl, "roundl is unportable - "
 
 
 #if @GNULIB_SINF@
-# if !@HAVE_SINF@
-#  undef sinf
+# if @REPLACE_SINF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sinf
+#   define sinf rpl_sinf
+#  endif
+_GL_FUNCDECL_RPL (sinf, float, (float x));
+_GL_CXXALIAS_RPL (sinf, float, (float x));
+# else
+#  if !@HAVE_SINF@
+ #  undef sinf
 _GL_FUNCDECL_SYS (sinf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (sinf, float, (float x));
+# endif
 _GL_CXXALIASWARN (sinf);
 #elif defined GNULIB_POSIXCHECK
 # undef sinf
@@ -1858,11 +2031,20 @@ _GL_WARN_ON_USE (sinl, "sinl is unportable - "
 
 
 #if @GNULIB_SINHF@
-# if !@HAVE_SINHF@
-#  undef sinhf
+# if @REPLACE_SINHF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sinhf
+#   define sinhf rpl_sinhf
+#  endif
+_GL_FUNCDECL_RPL (sinhf, float, (float x));
+_GL_CXXALIAS_RPL (sinhf, float, (float x));
+# else
+#  if !@HAVE_SINHF@
+#   undef sinhf
 _GL_FUNCDECL_SYS (sinhf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (sinhf, float, (float x));
+# endif
 _GL_CXXALIASWARN (sinhf);
 #elif defined GNULIB_POSIXCHECK
 # undef sinhf
@@ -1874,11 +2056,20 @@ _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
 
 
 #if @GNULIB_SQRTF@
-# if !@HAVE_SQRTF@
-#  undef sqrtf
+# if @REPLACE_SQRTF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef sqrtf
+#   define sqrtf rpl_sqrtf
+#  endif
+_GL_FUNCDECL_RPL (sqrtf, float, (float x));
+_GL_CXXALIAS_RPL (sqrtf, float, (float x));
+# else
+#  if !@HAVE_SQRTF@
+#   undef sqrtf
 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
+# endif
 _GL_CXXALIASWARN (sqrtf);
 #elif defined GNULIB_POSIXCHECK
 # undef sqrtf
@@ -1914,11 +2105,20 @@ _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
 
 
 #if @GNULIB_TANF@
-# if !@HAVE_TANF@
-#  undef tanf
+# if @REPLACE_TANF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef tanf
+#   define tanf rpl_tanf
+#  endif
+_GL_FUNCDECL_RPL (tanf, float, (float x));
+_GL_CXXALIAS_RPL (tanf, float, (float x));
+# else
+#  if !@HAVE_TANF@
+#   undef tanf
 _GL_FUNCDECL_SYS (tanf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (tanf, float, (float x));
+# endif
 _GL_CXXALIASWARN (tanf);
 #elif defined GNULIB_POSIXCHECK
 # undef tanf
@@ -1945,11 +2145,20 @@ _GL_WARN_ON_USE (tanl, "tanl is unportable - "
 
 
 #if @GNULIB_TANHF@
-# if !@HAVE_TANHF@
-#  undef tanhf
+# if @REPLACE_TANHF@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef tanhf
+#   define tanhf rpl_tanhf
+#  endif
+_GL_FUNCDECL_RPL (tanhf, float, (float x));
+_GL_CXXALIAS_RPL (tanhf, float, (float x));
+# else
+#  if !@HAVE_TANHF@
+#   undef tanhf
 _GL_FUNCDECL_SYS (tanhf, float, (float x));
-# endif
+#  endif
 _GL_CXXALIAS_SYS (tanhf, float, (float x));
+# endif
 _GL_CXXALIASWARN (tanhf);
 #elif defined GNULIB_POSIXCHECK
 # undef tanhf
@@ -1997,7 +2206,9 @@ _GL_FUNCDECL_SYS (trunc, double, (double x));
 #  endif
 _GL_CXXALIAS_SYS (trunc, double, (double x));
 # endif
+# if __GLIBC__ >= 2
 _GL_CXXALIASWARN (trunc);
+# endif
 #elif defined GNULIB_POSIXCHECK
 # undef trunc
 # if HAVE_RAW_DECL_TRUNC
@@ -2049,7 +2260,14 @@ _GL_EXTERN_C int gl_isfinitel (long double x);
 #  if defined isfinite || defined GNULIB_NAMESPACE
 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
 #   undef isfinite
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
+#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined _AIX))
+  /* This platform's <cmath> possibly defines isfinite through a set of inline
+     functions.  */
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite, rpl_isfinite, bool)
+#    define isfinite rpl_isfinite
+#   else
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite, isfinite, bool)
+#   endif
 #  endif
 # endif
 #elif defined GNULIB_POSIXCHECK
@@ -2076,7 +2294,14 @@ _GL_EXTERN_C int gl_isinfl (long double x);
 #  if defined isinf || defined GNULIB_NAMESPACE
 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
 #   undef isinf
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
+#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__))
+  /* This platform's <cmath> possibly defines isinf through a set of inline
+     functions.  */
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf, rpl_isinf, bool)
+#    define isinf rpl_isinf
+#   else
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf, isinf, bool)
+#   endif
 #  endif
 # endif
 #elif defined GNULIB_POSIXCHECK
@@ -2194,7 +2419,14 @@ _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
 #  if defined isnan || defined GNULIB_NAMESPACE
 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
 #   undef isnan
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
+#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__))
+  /* This platform's <cmath> possibly defines isnan through a set of inline
+     functions.  */
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan, rpl_isnan, bool)
+#    define isnan rpl_isnan
+#   else
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan, isnan, bool)
+#   endif
 #  endif
 # else
 /* Ensure isnan is a macro.  */
@@ -2221,7 +2453,7 @@ _GL_WARN_REAL_FLOATING_DECL (isnan);
     sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
     __builtin_signbitf (x))
 # endif
-# if @REPLACE_SIGNBIT@
+# if @REPLACE_SIGNBIT@ && !GNULIB_defined_signbit
 #  undef signbit
 _GL_EXTERN_C int gl_signbitf (float arg);
 _GL_EXTERN_C int gl_signbitd (double arg);
@@ -2264,12 +2496,20 @@ _GL_EXTERN_C int gl_signbitl (long double arg);
    (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
     sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
     gl_signbitf (x))
+#  define GNULIB_defined_signbit 1
 # endif
 # ifdef __cplusplus
 #  if defined signbit || defined GNULIB_NAMESPACE
 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
 #   undef signbit
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
+#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined _AIX))
+  /* This platform's <cmath> possibly defines signbit through a set of inline
+     functions.  */
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit, rpl_signbit, bool)
+#    define signbit rpl_signbit
+#   else
+_GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit, signbit, bool)
+#   endif
 #  endif
 # endif
 #elif defined GNULIB_POSIXCHECK