With autoconf 2.70 we must use AC_PROG_CC (which will check for c11
and c99), for earlier versions we'll use AC_PROG_CC_C99. Also use
AC_PROG_LEX([noyywrap]), the extra argument is ignored with earlier
versions, but required for 2.70.
Signed-off-by: Mark Wielaard <mark@klomp.org>
+2022-10-22 Mark Wielaard <mark@klomp.org>
+
+ * configure.ac: Use AC_PROG_CC with autoconf 2.70, or AC_PROG_CC_C99
+ for earlier versions. Use AC_PROG_LEX([noyywrap]).
+
2022-09-13 Aleksei Vetrov <vvvvvv@google.com>
* NEWS (libdwfl): Add dwfl_report_offline_memory.
AH_TEMPLATE([USE_LOCKS], [Defined if libraries should be thread-safe.])
-AC_PROG_CC_C99
+m4_version_prereq([2.70], [AC_PROG_CC], [AC_PROG_CC_C99])
AC_PROG_CXX
AC_PROG_RANLIB
AC_PROG_YACC
-AM_PROG_LEX
+AC_PROG_LEX([noyywrap])
# Only available since automake 1.12
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_CHECK_TOOL([READELF], [readelf])