gdb/selftest.m4: ensure $development is set

Before commit 3d1e5a43cb ("gdbsupport/configure.ac: source
development.sh"), the GDB build in non-development mode (turn
development to false in bfd/development.sh if you want to try) was
broken because the gdbsupport configure script didn't source
bfd/development.sh to set the development variable.

Since the GDB_AC_SELFTEST macro relies on the `development` variable, I
propose to modify it such that it errors out if $development does not
have an expected value of "true" or "false".  This could prevent a
future similar problem from happening while refactoring the configure
scripts.  It would have caught the problem fixed by the patch mentioned
earlier.

gdb/ChangeLog:

	* selftest.m4 (GDB_AC_SELFTEST): Error out if $development is
	not "true" or "false".
	* configure: Re-generate.

gdbserver/ChangeLog:

	* configure: Re-generate.

gdbsupport/ChangeLog:

	* configure: Re-generate.

gdb/ChangeLog

@@ -1,3 +1,9 @@
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* selftest.m4 (GDB_AC_SELFTEST): Error out if $development is
+	not "true" or "false".
+	* configure: Re-generate.
+
 2020-03-12  Christian Biesinger  <cbiesinger@google.com>
 
 	* Makefile.in (HFILES_NO_SRCDIR): Add new arm-nbsd-tdep.h file.

gdb/configure

@@ -19187,6 +19187,11 @@ $as_echo "#define GDB_DEFAULT_HOST_CHARSET \"UTF-8\"" >>confdefs.h
 # The default value of this option changes depending whether we're on
 # development mode (in which case it's "true") or not (in which case
 # it's "false").
+
+if test "x$development" != xtrue && test "x$development" != xfalse; then :
+  as_fn_error $? "Invalid value for \$development, got \"$development\", expecting \"true\" or \"false\"." "$LINENO" 5
+fi
+
 # Check whether --enable-unit-tests was given.
 if test "${enable_unit_tests+set}" = set; then :
   enableval=$enable_unit_tests; case "${enableval}" in

gdb/selftest.m4

@@ -27,6 +27,10 @@ AC_DEFUN([GDB_AC_SELFTEST],[
 # 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").
+
+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]),

gdbserver/ChangeLog

@@ -1,3 +1,7 @@
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* configure: Re-generate.
+
 2020-03-11  Simon Marchi  <simon.marchi@efficios.com>
 
 	* configure: Re-generate.

gdbserver/configure

@@ -6083,6 +6083,11 @@ fi
 # 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").
+
+if test "x$development" != xtrue && test "x$development" != xfalse; then :
+  as_fn_error $? "Invalid value for \$development, got \"$development\", expecting \"true\" or \"false\"." "$LINENO" 5
+fi
+
 # Check whether --enable-unit-tests was given.
 if test "${enable_unit_tests+set}" = set; then :
   enableval=$enable_unit_tests; case "${enableval}" in

gdbsupport/ChangeLog

@@ -1,3 +1,7 @@
+2020-03-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* configure: Re-generate.
+
 2020-03-11  Simon Marchi  <simon.marchi@efficios.com>
 
 	* configure: Re-generate.

gdbsupport/configure

@@ -10606,6 +10606,11 @@ $as_echo "$bfd_cv_have_sys_procfs_type_elf_fpregset_t" >&6; }
 # 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").
+
+if test "x$development" != xtrue && test "x$development" != xfalse; then :
+  as_fn_error $? "Invalid value for \$development, got \"$development\", expecting \"true\" or \"false\"." "$LINENO" 5
+fi
+
 # Check whether --enable-unit-tests was given.
 if test "${enable_unit_tests+set}" = set; then :
   enableval=$enable_unit_tests; case "${enableval}" in