AC_USE_SYSTEM_EXTENSIONS
AC_SYS_LARGEFILE
AC_PROG_CC
-AC_PROG_CC_STDC
+# AC_PROG_CC_STDC was merged in AC_PROG_CC in autoconf 2.70
+m4_version_prereq([2.70], [], [AC_PROG_CC_STDC])
# Checks for programs.
AC_PROG_MAKE_SET
LT_INIT
AC_PROG_YACC
-AC_PROG_LEX
+# Prior to autoconf 2.70, AC_PROG_FLEX did not take an argument. This is not a
+# problem since the argument is silently ignored by older versions.
+AC_PROG_LEX([noyywrap])
AC_PROG_MKDIR_P
AC_PROG_LN_S
swig_version=2.0.0
AC_ARG_ENABLE([python-bindings],
- [AC_HELP_STRING([--enable-python-bindings],
+ [AS_HELP_STRING([--enable-python-bindings],
[generate Python bindings])],
[enable_python=yes], [enable_python=no])
# Do _not_ indent the help string below (appears in the configure --help
# output).
AC_ARG_ENABLE([debug-info],
-[AC_HELP_STRING([--enable-debug-info], [enable the debug info feature (default on Linux)])]
-[AC_HELP_STRING([--disable-debug-info], [disable the debug info feature (default on OS X and Solaris)])],
+[AS_HELP_STRING([--enable-debug-info], [enable the debug info feature (default on Linux)])]
+[AS_HELP_STRING([--disable-debug-info], [disable the debug info feature (default on OS X and Solaris)])],
[AS_IF([test "x$enableval" = xyes], [_enable_debug_info=yes], [_enable_debug_info=no])], [])
AM_CONDITIONAL([ENABLE_DEBUG_INFO], [test "x$_enable_debug_info" = xyes])