switched to use AX_CHECK_NUMVALOF() to detect PATH_MAX

moo/configure

@@ -19962,37 +19962,6 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
 fi
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PATH_MAX" >&5
-$as_echo_n "checking for PATH_MAX... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-	#include <limits.h>
-int
-main ()
-{
-;;;;;;;;;;
-PATH_MAX
-  ;
-  return 0;
-}
-
-_ACEOF
-moo_cv_path_max="`$ac_cv_prog_CPP conftest.c | awk '/;;;;;;;;;;/ { start=1 } /^(0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)*/ { if (start == 1) { print $0; start++; } }'`"
-if test "x${moo_cv_path_max}" = "x"
-then
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: not defined" >&5
-$as_echo "not defined" >&6; }
-else
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${moo_cv_path_max}" >&5
-$as_echo "${moo_cv_path_max}" >&6; }
-
-cat >>confdefs.h <<_ACEOF
-#define MOO_PATH_MAX ${moo_cv_path_max}
-_ACEOF
-
-fi
-
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
@@ -20870,6 +20839,33 @@ _ACEOF
 
 
 
+
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking numeric value of PATH_MAX" >&5
+$as_echo_n "checking numeric value of PATH_MAX... " >&6; }
+if ${ax_cv_numvalof_PATH_MAX+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if ac_fn_c_compute_int "$LINENO" "(PATH_MAX)" "ax_cv_numvalof_PATH_MAX"        "#include <limits.h>
+"; then :
+
+else
+  ax_cv_numvalof_PATH_MAX=0
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_numvalof_PATH_MAX" >&5
+$as_echo "$ax_cv_numvalof_PATH_MAX" >&6; }
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define NUMVALOF_PATH_MAX $ax_cv_numvalof_PATH_MAX
+_ACEOF
+
+
+
+
 if test "x${platform_win32}" = "xyes"
 then
 	# The cast to long int works around a bug in the HP C Compiler
@@ -21856,6 +21852,14 @@ cat >>confdefs.h <<_ACEOF
 #define MOO_MBLEN_MAX ${ax_cv_numvalof_MB_LEN_MAX}
 _ACEOF
 
+if test ${ax_cv_numvalof_PATH_MAX} -gt 0
+then
+
+cat >>confdefs.h <<_ACEOF
+#define QSE_PATH_MAX ${ax_cv_numvalof_PATH_MAX}
+_ACEOF
+
+fi
 
 
 cat >>confdefs.h <<_ACEOF

moo/configure.ac

@@ -253,25 +253,6 @@ AC_TRY_RUN(
 	]
 )
 
-dnl check the defined value of PATH_MAX in limits.h
-dnl look for a numeric value of 2 or more digits after preprocessing.
-AC_MSG_CHECKING([for PATH_MAX])
-AC_LANG_CONFTEST([
-	AC_LANG_PROGRAM(
-		[#include <limits.h>],
-		[;;;;;;;;;;
-PATH_MAX])
-])
-moo_cv_path_max="`$ac_cv_prog_CPP conftest.c | awk '/;;;;;;;;;;/ { start=1 } /^(0|1|2|3|4|5|6|7|8|9)(0|1|2|3|4|5|6|7|8|9)*/ { if (start == 1) { print $0; start++; } }'`"
-if test "x${moo_cv_path_max}" = "x"
-then
-	dnl either not defined or defined to a non-numeric value
-	AC_MSG_RESULT(not defined)
-else
-	AC_MSG_RESULT(${moo_cv_path_max})
-	AC_DEFINE_UNQUOTED(MOO_PATH_MAX, ${moo_cv_path_max}, [PATH_MAX])
-fi
-
 dnl check the size of primitive data types
 AC_CHECK_SIZEOF(char,,[[]])
 AC_CHECK_SIZEOF(short,,[[]])
@@ -302,6 +283,7 @@ AC_CHECK_SIZEOF(off64_t)
 
 AC_CHECK_SIZEOF(mbstate_t,,[#include <wchar.h>])
 AX_CHECK_NUMVALOF(MB_LEN_MAX,[32],[#include <limits.h>])
+AX_CHECK_NUMVALOF(PATH_MAX,[0],[#include <limits.h>])
 
 if test "x${platform_win32}" = "xyes"
 then
@@ -510,6 +492,10 @@ AC_DEFINE_UNQUOTED(MOO_SIZEOF_OFF64_T, ${ac_cv_sizeof_off64_t}, [sizeof(off64_t)
 
 AC_DEFINE_UNQUOTED(MOO_SIZEOF_MBSTATE_T, ${ac_cv_sizeof_mbstate_t}, [sizeof(mbstate_t)])
 AC_DEFINE_UNQUOTED(MOO_MBLEN_MAX, ${ax_cv_numvalof_MB_LEN_MAX}, [MB_LEN_MAX])
+if test ${ax_cv_numvalof_PATH_MAX} -gt 0
+then
+	AC_DEFINE_UNQUOTED(QSE_PATH_MAX, ${ax_cv_numvalof_PATH_MAX}, [PATH_MAX])
+fi
 
 AC_DEFINE_UNQUOTED(MOO_SIZEOF_STRUCT_SOCKADDR_IN, ${ac_cv_sizeof_struct_sockaddr_in}, [sizeof(struct sockaddr_in)])
 AC_DEFINE_UNQUOTED(MOO_SIZEOF_STRUCT_SOCKADDR_IN6, ${ac_cv_sizeof_struct_sockaddr_in6}, [sizeof(struct sockaddr_in6)])

moo/lib/moo-cfg.h.in

@@ -416,9 +416,6 @@
 /* Patch level */
 #undef MOO_PACKAGE_VERSION_PATCH
 
-/* PATH_MAX */
-#undef MOO_PATH_MAX
-
 /* Define if sa_family_t is signed */
 #undef MOO_SA_FAMILY_T_IS_SIGNED
 
@@ -515,6 +512,9 @@
 /* The size of `MB_LEN_MAX', as computed by valueof. */
 #undef NUMVALOF_MB_LEN_MAX
 
+/* The size of `PATH_MAX', as computed by valueof. */
+#undef NUMVALOF_PATH_MAX
+
 /* Name of package */
 #undef PACKAGE
 
@@ -540,6 +540,9 @@
    your system. */
 #undef PTHREAD_CREATE_JOINABLE
 
+/* PATH_MAX */
+#undef QSE_PATH_MAX
+
 /* The size of `char', as computed by sizeof. */
 #undef SIZEOF_CHAR