minor portability fixes; printf now uses double for floating point conversions by default in posix mode

configure.ac

@@ -21,7 +21,7 @@ dnl Process this file with autoconf to produce a configure script.
 #   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_REVISION([for Bash 5.2, version 5.039])dnl
+AC_REVISION([for Bash 5.2, version 5.040])dnl
 
 define(bashvers, 5.2)
 define(relstatus, beta)
@@ -713,6 +713,8 @@ AC_SUBST(SIZE)
 m4_include([m4/stat-time.m4])
 m4_include([m4/timespec.m4])
 
+m4_include([m4/strtoimax.m4])
+
 dnl include files for gettext
 
 m4_include([m4/codeset.m4])
@@ -859,7 +861,7 @@ AC_CHECK_FUNCS(arc4random)
 
 AC_REPLACE_FUNCS(getcwd memset)
 AC_REPLACE_FUNCS(strcasecmp strcasestr strerror strftime strnlen strpbrk strstr)
-AC_REPLACE_FUNCS(strtod strtol strtoul strtoll strtoull strtoimax strtoumax)
+AC_REPLACE_FUNCS(strtod strtol strtoul strtoll strtoull strtoumax)
 AC_REPLACE_FUNCS(dprintf)
 AC_REPLACE_FUNCS(strchrnul)
 AC_REPLACE_FUNCS(strdup)
@@ -894,7 +896,6 @@ AC_CHECK_DECLS([strtold], [
     fi
 ])
 
-AC_CHECK_DECLS(strtoimax)
 AC_CHECK_DECLS(strtol)
 AC_CHECK_DECLS(strtoll)
 AC_CHECK_DECLS(strtoul)
@@ -1068,6 +1069,8 @@ BASH_FUNC_STRCOLL
 BASH_FUNC_SNPRINTF
 BASH_FUNC_VSNPRINTF
 
+BASH_FUNC_STRTOIMAX
+
 dnl If putenv or unsetenv is not present, set the right define so the
 dnl prototype and declaration in lib/sh/getenv.c will be standard-conformant