Move gnulib to top level

This patch moves the gdb/gnulib subdirectory to the top level.

It adjusts the top-level build system to build gnulib when necessary,
and changes gdb to use this.  However, gdbserver still builds its own
copy of gnulib, just from the new source location.

A small hack was needed to ensure that gnulib is only built when gdb
is enabled.  The Makefile only provides an ordering -- the directory
must be mentioned in configdirs to actually be compiled at all.

Most of the patch is just a "git mv" of gnulib, though a few minor
path adjustments were needed in some files there.

Tested by the buildbot.

ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* MAINTAINERS: Add gnulib.
	* gnulib: New directory, move from gdb/gnulib.
	* configure.ac (host_libs): Add gnulib.
	* configure: Rebuild.
	* Makefile.def (host_modules, dependencies): Add gnulib.
	* Makefile.in: Rebuild.

gdb/ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* gnulib: Move directory to top-level.
	* configure.ac: Don't configure gnulib.
	* configure: Rebuild.
	* common/common-defs.h: Use new path to gnulib.
	* Makefile.in (GNULIB_BUILDDIR): Now ../gnulib.
	(GNULIB_H): Remove.
	(INCGNU): Look in new gnulib location.
	(HFILES_NO_SRCDIR): Remove gnulib files.
	(SUBDIR, REQUIRED_SUBDIRS): Remove gnulib.
	(generated_files): Remove GNULIB_H.
	($(LIBGNU), all-lib): Remove targets.
	(distclean): Don't mention GNULIB_BUILDDIR.
	($(GNULIB_BUILDDIR)/Makefile): Remove target.

gdb/gdbserver/ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* configure.ac: Use new path to gnulib.
	* configure: Rebuild.
	* Makefile.in (INCGNU, $(GNULIB_BUILDDIR)/Makefile): Use new path
	to gnulib.

gnulib/ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* update-gnulib.sh: Adjust paths.
	* Makefile.in: Adjust paths.
	* configure.ac: Adjust paths.  Use ACX_LARGEFILE.
	* configure: Rebuild.

1 files changed, 120 insertions, 0 deletions

diff --git a/gnulib/import/m4/stdlib_h.m4 b/gnulib/import/m4/stdlib_h.m4
new file mode 100644
index 0000000..3999068
--- /dev/null
+++ b/gnulib/import/m4/stdlib_h.m4
@@ -0,0 +1,120 @@
+# stdlib_h.m4 serial 43
+dnl Copyright (C) 2007-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_STDLIB_H],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  gl_NEXT_HEADERS([stdlib.h])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use, and which is not
+  dnl guaranteed by C89.
+  gl_WARN_ON_USE_PREPARE([[#include <stdlib.h>
+#if HAVE_SYS_LOADAVG_H
+# include <sys/loadavg.h>
+#endif
+#if HAVE_RANDOM_H
+# include <random.h>
+#endif
+    ]], [_Exit atoll canonicalize_file_name getloadavg getsubopt grantpt
+    initstate initstate_r mkdtemp mkostemp mkostemps mkstemp mkstemps
+    posix_openpt ptsname ptsname_r qsort_r random random_r realpath rpmatch
+    secure_getenv setenv setstate setstate_r srandom srandom_r
+    strtod strtoll strtoull unlockpt unsetenv])
+])
+
+AC_DEFUN([gl_STDLIB_MODULE_INDICATOR],
+[
+  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
+  dnl Define it also as a C macro, for the benefit of the unit tests.
+  gl_MODULE_INDICATOR_FOR_TESTS([$1])
+])
+
+AC_DEFUN([gl_STDLIB_H_DEFAULTS],
+[
+  GNULIB__EXIT=0;         AC_SUBST([GNULIB__EXIT])
+  GNULIB_ATOLL=0;         AC_SUBST([GNULIB_ATOLL])
+  GNULIB_CALLOC_POSIX=0;  AC_SUBST([GNULIB_CALLOC_POSIX])
+  GNULIB_CANONICALIZE_FILE_NAME=0;  AC_SUBST([GNULIB_CANONICALIZE_FILE_NAME])
+  GNULIB_GETLOADAVG=0;    AC_SUBST([GNULIB_GETLOADAVG])
+  GNULIB_GETSUBOPT=0;     AC_SUBST([GNULIB_GETSUBOPT])
+  GNULIB_GRANTPT=0;       AC_SUBST([GNULIB_GRANTPT])
+  GNULIB_MALLOC_POSIX=0;  AC_SUBST([GNULIB_MALLOC_POSIX])
+  GNULIB_MBTOWC=0;        AC_SUBST([GNULIB_MBTOWC])
+  GNULIB_MKDTEMP=0;       AC_SUBST([GNULIB_MKDTEMP])
+  GNULIB_MKOSTEMP=0;      AC_SUBST([GNULIB_MKOSTEMP])
+  GNULIB_MKOSTEMPS=0;     AC_SUBST([GNULIB_MKOSTEMPS])
+  GNULIB_MKSTEMP=0;       AC_SUBST([GNULIB_MKSTEMP])
+  GNULIB_MKSTEMPS=0;      AC_SUBST([GNULIB_MKSTEMPS])
+  GNULIB_POSIX_OPENPT=0;  AC_SUBST([GNULIB_POSIX_OPENPT])
+  GNULIB_PTSNAME=0;       AC_SUBST([GNULIB_PTSNAME])
+  GNULIB_PTSNAME_R=0;     AC_SUBST([GNULIB_PTSNAME_R])
+  GNULIB_PUTENV=0;        AC_SUBST([GNULIB_PUTENV])
+  GNULIB_QSORT_R=0;       AC_SUBST([GNULIB_QSORT_R])
+  GNULIB_RANDOM=0;        AC_SUBST([GNULIB_RANDOM])
+  GNULIB_RANDOM_R=0;      AC_SUBST([GNULIB_RANDOM_R])
+  GNULIB_REALLOC_POSIX=0; AC_SUBST([GNULIB_REALLOC_POSIX])
+  GNULIB_REALPATH=0;      AC_SUBST([GNULIB_REALPATH])
+  GNULIB_RPMATCH=0;       AC_SUBST([GNULIB_RPMATCH])
+  GNULIB_SECURE_GETENV=0; AC_SUBST([GNULIB_SECURE_GETENV])
+  GNULIB_SETENV=0;        AC_SUBST([GNULIB_SETENV])
+  GNULIB_STRTOD=0;        AC_SUBST([GNULIB_STRTOD])
+  GNULIB_STRTOLL=0;       AC_SUBST([GNULIB_STRTOLL])
+  GNULIB_STRTOULL=0;      AC_SUBST([GNULIB_STRTOULL])
+  GNULIB_SYSTEM_POSIX=0;  AC_SUBST([GNULIB_SYSTEM_POSIX])
+  GNULIB_UNLOCKPT=0;      AC_SUBST([GNULIB_UNLOCKPT])
+  GNULIB_UNSETENV=0;      AC_SUBST([GNULIB_UNSETENV])
+  GNULIB_WCTOMB=0;        AC_SUBST([GNULIB_WCTOMB])
+  dnl Assume proper GNU behavior unless another module says otherwise.
+  HAVE__EXIT=1;              AC_SUBST([HAVE__EXIT])
+  HAVE_ATOLL=1;              AC_SUBST([HAVE_ATOLL])
+  HAVE_CANONICALIZE_FILE_NAME=1;  AC_SUBST([HAVE_CANONICALIZE_FILE_NAME])
+  HAVE_DECL_GETLOADAVG=1;    AC_SUBST([HAVE_DECL_GETLOADAVG])
+  HAVE_GETSUBOPT=1;          AC_SUBST([HAVE_GETSUBOPT])
+  HAVE_GRANTPT=1;            AC_SUBST([HAVE_GRANTPT])
+  HAVE_MKDTEMP=1;            AC_SUBST([HAVE_MKDTEMP])
+  HAVE_MKOSTEMP=1;           AC_SUBST([HAVE_MKOSTEMP])
+  HAVE_MKOSTEMPS=1;          AC_SUBST([HAVE_MKOSTEMPS])
+  HAVE_MKSTEMP=1;            AC_SUBST([HAVE_MKSTEMP])
+  HAVE_MKSTEMPS=1;           AC_SUBST([HAVE_MKSTEMPS])
+  HAVE_POSIX_OPENPT=1;       AC_SUBST([HAVE_POSIX_OPENPT])
+  HAVE_PTSNAME=1;            AC_SUBST([HAVE_PTSNAME])
+  HAVE_PTSNAME_R=1;          AC_SUBST([HAVE_PTSNAME_R])
+  HAVE_QSORT_R=1;            AC_SUBST([HAVE_QSORT_R])
+  HAVE_RANDOM=1;             AC_SUBST([HAVE_RANDOM])
+  HAVE_RANDOM_H=1;           AC_SUBST([HAVE_RANDOM_H])
+  HAVE_RANDOM_R=1;           AC_SUBST([HAVE_RANDOM_R])
+  HAVE_REALPATH=1;           AC_SUBST([HAVE_REALPATH])
+  HAVE_RPMATCH=1;            AC_SUBST([HAVE_RPMATCH])
+  HAVE_SECURE_GETENV=1;      AC_SUBST([HAVE_SECURE_GETENV])
+  HAVE_SETENV=1;             AC_SUBST([HAVE_SETENV])
+  HAVE_DECL_SETENV=1;        AC_SUBST([HAVE_DECL_SETENV])
+  HAVE_STRTOD=1;             AC_SUBST([HAVE_STRTOD])
+  HAVE_STRTOLL=1;            AC_SUBST([HAVE_STRTOLL])
+  HAVE_STRTOULL=1;           AC_SUBST([HAVE_STRTOULL])
+  HAVE_STRUCT_RANDOM_DATA=1; AC_SUBST([HAVE_STRUCT_RANDOM_DATA])
+  HAVE_SYS_LOADAVG_H=0;      AC_SUBST([HAVE_SYS_LOADAVG_H])
+  HAVE_UNLOCKPT=1;           AC_SUBST([HAVE_UNLOCKPT])
+  HAVE_DECL_UNSETENV=1;      AC_SUBST([HAVE_DECL_UNSETENV])
+  REPLACE_CALLOC=0;          AC_SUBST([REPLACE_CALLOC])
+  REPLACE_CANONICALIZE_FILE_NAME=0;  AC_SUBST([REPLACE_CANONICALIZE_FILE_NAME])
+  REPLACE_MALLOC=0;          AC_SUBST([REPLACE_MALLOC])
+  REPLACE_MBTOWC=0;          AC_SUBST([REPLACE_MBTOWC])
+  REPLACE_MKSTEMP=0;         AC_SUBST([REPLACE_MKSTEMP])
+  REPLACE_PTSNAME=0;         AC_SUBST([REPLACE_PTSNAME])
+  REPLACE_PTSNAME_R=0;       AC_SUBST([REPLACE_PTSNAME_R])
+  REPLACE_PUTENV=0;          AC_SUBST([REPLACE_PUTENV])
+  REPLACE_QSORT_R=0;         AC_SUBST([REPLACE_QSORT_R])
+  REPLACE_RANDOM_R=0;        AC_SUBST([REPLACE_RANDOM_R])
+  REPLACE_REALLOC=0;         AC_SUBST([REPLACE_REALLOC])
+  REPLACE_REALPATH=0;        AC_SUBST([REPLACE_REALPATH])
+  REPLACE_SETENV=0;          AC_SUBST([REPLACE_SETENV])
+  REPLACE_STRTOD=0;          AC_SUBST([REPLACE_STRTOD])
+  REPLACE_UNSETENV=0;        AC_SUBST([REPLACE_UNSETENV])
+  REPLACE_WCTOMB=0;          AC_SUBST([REPLACE_WCTOMB])
+])