Remove gdb/testsuite/configure

I didn't see a strong reason to have a separate configure script in
gdb/testsuite, so this patch removes it.  The few relevant configury
bits are moved into gdb's configure script.  Some of the old
testsuite/configure script (e.g., the header check) is dead code.

This also adds a Makefile rule to rebuild lib/pdtrace.  This was
missing from the old code.

'read1' is now a dependency of check-read1, rather than extra code at
configure time.

Finally, the old "ENABLE_LIBCTF" subst in gdb/configure was not used;
nor was the variable defined, so this was always empty.  However, the
lower-case variant was used by the testsuite, so this patch renames
the subst.

gdb/ChangeLog
2021-06-01  Tom Tromey  <tromey@adacore.com>

	* configure.ac: Copy some code from testsuite/configure.ac.
	(enable_libctf): Subst this, not ENABLE_LIBCTF.
	* configure: Rebuild.

gdb/testsuite/ChangeLog
2021-06-01  Tom Tromey  <tromey@adacore.com>

	* aclocal.m4, configure.ac, configure: Remove.
	* Makefile.in (EXTRA_RULES): Remove.
	($(abs_builddir)/site.exp site.exp): Don't depend on
	config.status.
	(distclean maintainer-clean realclean, Makefile): Update.
	(config.status): Remove target.
	(lib/pdtrace): New target.
	(all): Don't depend on EXTRA_RULES.
	(check-read1): Depend on read1.so, expect-read1.

1 files changed, 0 insertions, 99 deletions

diff --git a/gdb/testsuite/configure.ac b/gdb/testsuite/configure.ac
deleted file mode 100644
index b15dbcb..0000000
--- a/gdb/testsuite/configure.ac
+++ /dev/null
@@ -1,99 +0,0 @@
-#                                                       -*- Autoconf -*-
-# Process this file with autoconf to produce a configure script.
-
-# Copyright 2002-2021 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
-# the Free Software Foundation; either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# 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/>.
-
-AC_INIT
-AC_CONFIG_SRCDIR([gdb.base])
-
-AC_CANONICAL_BUILD
-AC_CANONICAL_HOST
-AC_CANONICAL_TARGET
-
-ACX_NONCANONICAL_TARGET
-
-# Enable gdbtk.
-AC_ARG_ENABLE(gdbtk,
-[  --enable-gtk            enable gdbtk graphical user interface (GUI)],,
-  [if test -d $srcdir/../gdbtk && test -d $srcdir/gdb.gdbtk; then
-    enable_gdbtk=yes
-  else
-    enable_gdbtk=no
-  fi])
-# We unconditionally disable gdbtk tests on selected platforms.
-case $host_os in
-  go32* | windows*)
-    enable_gdbtk=no ;;
-esac
-
-# Add gdbtk tests when appropriate.
-if test $enable_gdbtk = yes; then
-   AC_CONFIG_SUBDIRS(gdb.gdbtk)
-fi
-
-GCC_ENABLE([libctf], [yes], [], [Handle .ctf type-info sections])
-AC_SUBST(enable_libctf)
-
-# Enable shared libraries.
-AC_ARG_ENABLE(shared,
-[  --enable-shared         build shared libraries [deault=yes]],,
-  enable_shared=yes)
-
-# If we have shared libraries, try to set RPATH_ENVVAR reasonably,
-# such that we can find the shared libraries in the build tree.
-if test $enable_shared = no; then
-  # The variable `RPATH_ENVVAR' itself is not likely to be used on any
-  # platform.
-  RPATH_ENVVAR=RPATH_ENVVAR
-else
-  # The variable `LD_LIBRARY_PATH' is used on most platforms.
-  RPATH_ENVVAR=LD_LIBRARY_PATH
-  # The following exceptions are taken from Libtool 1.4.3.
-  case $host_os in
-    aix*)
-      if test $host_cpu != ia64; then
-        RPATH_ENVVAR=LIBPATH
-      fi ;;
-    darwin* | rhapsody*)
-      RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
-  esac
-fi
-AC_SUBST(RPATH_ENVVAR)
-
-AC_CHECK_HEADERS(pthread.h)
-
-AC_EXEEXT
-
-if test "${build}" = "${host}" -a "${host}" = "${target}"; then
-   case "${host}" in
-     *gnu*)
-       EXTRA_RULES=read1
-       ;;
-   esac
-fi
-AC_SUBST(EXTRA_RULES)
-
-# Transform the name of some programs and generate the lib/pdtrace
-# test tool.
-AC_ARG_PROGRAM
-GDB_AC_TRANSFORM(strip, STRIP_TRANSFORM_NAME)
-GDB_AC_TRANSFORM(readelf, READELF_TRANSFORM_NAME)
-GDB_AC_TRANSFORM(as, GAS_TRANSFORM_NAME)
-GDB_AC_TRANSFORM(nm, NM_TRANSFORM_NAME)
-AC_CONFIG_FILES([lib/pdtrace], [chmod +x lib/pdtrace])
-AC_CONFIG_FILES([Makefile])
-
-AC_OUTPUT