Move gdb/selftest.m4 to gdbsupport/selftest.m4

The selftest.m4 file is used by gdb, gdbserver and gdbsupport, I think
it belongs in gdbsupport.

gdb/ChangeLog:

	* selftest.m4: Move to gdbsupport/.
	* acinclude.m4: Update path to selftest.m4.

gdbserver/ChangeLog:

	* acinclude.m4: Update path to selftest.m4.

gdbsupport/ChangeLog:

	* selftest.m4: Moved from gdb/.
	* acinclude.m4: Update path to selftest.m4.

4 files changed, 57 insertions, 3 deletions

diff --git a/gdbsupport/ChangeLog b/gdbsupport/ChangeLog
index e7474e1..4b678eb 100644
--- a/gdbsupport/ChangeLog
+++ b/gdbsupport/ChangeLog
@@ -1,5 +1,10 @@
 2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
 
+	* selftest.m4: Moved from gdb/.
+	* acinclude.m4: Update path to selftest.m4.
+
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
 	* configure.ac: Don't source bfd/development.sh.
 	* common.m4: Source bfd/development.sh.
 	* configure: Re-generate.
diff --git a/gdbsupport/Makefile.in b/gdbsupport/Makefile.in
index 360ad3f..7ed2e6f 100644
--- a/gdbsupport/Makefile.in
+++ b/gdbsupport/Makefile.in
@@ -122,8 +122,7 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/codeset.m4 \
 	$(top_srcdir)/../bfd/bfd.m4 $(top_srcdir)/common.m4 \
 	$(top_srcdir)/../config/ax_pthread.m4 \
 	$(top_srcdir)/../gdb/ax_cxx_compile_stdcxx.m4 \
-	$(top_srcdir)/../gdb/libiberty.m4 \
-	$(top_srcdir)/../gdb/selftest.m4 \
+	$(top_srcdir)/../gdb/libiberty.m4 $(top_srcdir)/selftest.m4 \
 	$(top_srcdir)/../gdb/ptrace.m4 $(top_srcdir)/warning.m4 \
 	$(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
diff --git a/gdbsupport/acinclude.m4 b/gdbsupport/acinclude.m4
index d638ebc..4c86c4f 100644
--- a/gdbsupport/acinclude.m4
+++ b/gdbsupport/acinclude.m4
@@ -3,7 +3,7 @@ m4_include([common.m4])
 m4_include([../config/ax_pthread.m4])
 m4_include([../gdb/ax_cxx_compile_stdcxx.m4])
 m4_include([../gdb/libiberty.m4])
-m4_include([../gdb/selftest.m4])
+m4_include([selftest.m4])
 m4_include([../gdb/ptrace.m4])
 
 dnl This gets AM_GDB_WARNINGS.
diff --git a/gdbsupport/selftest.m4 b/gdbsupport/selftest.m4
new file mode 100644
index 0000000..3624f25
--- /dev/null
+++ b/gdbsupport/selftest.m4
@@ -0,0 +1,50 @@
+dnl Copyright (C) 2018-2020 Free Software Foundation, Inc.
+dnl
+dnl This file is part of GDB.
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+dnl GDB_AC_SELFTEST(ACTION-IF-ENABLED)
+dnl
+dnl Enable the unit/self tests if needed.  If they are enabled, AC_DEFINE
+dnl the GDB_SELF_TEST macro, and execute ACTION-IF-ENABLED.
+
+AC_DEFUN([GDB_AC_SELFTEST],[
+# Check whether we will enable the inclusion of unit tests when
+# compiling GDB.
+#
+# The default value of this option changes depending whether we're on
+# development mode (in which case it's "true") or not (in which case
+# it's "false").  The $development variable is set by the GDB_AC_COMMON
+# macro, which must therefore be used before GDB_AC_SELFTEST.
+
+AS_IF([test "x$development" != xtrue && test "x$development" != xfalse],
+  [AC_MSG_ERROR([Invalid value for \$development, got "$development", expecting "true" or "false".])])
+
+AC_ARG_ENABLE(unit-tests,
+AS_HELP_STRING([--enable-unit-tests],
+[Enable the inclusion of unit tests when compiling GDB]),
+[case "${enableval}" in
+  yes)  enable_unittests=true  ;;
+  no)   enable_unittests=false ;;
+  *)    AC_MSG_ERROR(
+[bad value ${enableval} for --{enable,disable}-unit-tests option]) ;;
+esac], [enable_unittests=$development])
+
+if $enable_unittests; then
+  AC_DEFINE(GDB_SELF_TEST, 1,
+            [Define if self-testing features should be enabled])
+  $1
+fi
+])