update configure so its more robust in checking for Perl

ChangeLog

@@ -5,6 +5,7 @@ Fish (F), Mark (M), DeadNotBuried (D)
 ===============================================================================
 * NeoStats * Version 3.0.1 (F)
  - Bump Version (F)
+ - A much more robust checking if Perl is available in configure (F)
 
 * NeoStats * Version 3.0.0
  - Finish the Update Module (F)

autotools/ccdv.m4

@@ -89,7 +89,7 @@ if test "x$CCDV" != x ; then
 	wi_cv_path_ccdv="$CCDV"
 	CC="$CCDV $CC"	# trailing space needed
 	USECCDV="#"
-	AC_MSG_RESULT($ccdv)
+	AC_MSG_RESULT($CCDV)
 else
 	wi_cv_path_ccdv=""
 	USECCDV=""

configure

@@ -24901,6 +24901,14 @@ echo $ECHO_N "checking for Perl compile flags... $ECHO_C" >&6; }
 echo "${ECHO_T}not found, building without perl." >&6; }
 			perl=no
 		else
+			{ echo "$as_me:$LINENO: result: ok" >&5
+echo "${ECHO_T}ok" >&6; }
+			{ echo "$as_me:$LINENO: checking Checking for perl includes directory" >&5
+echo $ECHO_N "checking Checking for perl includes directory... $ECHO_C" >&6; }
+			PERL_INCLUDES=`$perlpath -MExtUtils::Embed -e perl_inc 2>/dev/null`
+			{ echo "$as_me:$LINENO: result: $PERL_INCLUDES" >&5
+echo "${ECHO_T}$PERL_INCLUDES" >&6; }
+			CFLAGS="$CFLAGS "$PERL_INCLUDES
 			PERL_LDFLAGS=`$perlpath -MExtUtils::Embed -e ldopts |$sedpath 's/-lgdbm //'`
 			PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-ldb //'`
 			PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-lndbm //'`
@@ -24909,8 +24917,6 @@ echo "${ECHO_T}not found, building without perl." >&6; }
 				PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-lposix //'`
 			fi
 			PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-lc //'`
-			{ echo "$as_me:$LINENO: result: ok" >&5
-echo "${ECHO_T}ok" >&6; }
 
 			{ echo "$as_me:$LINENO: checking for $perlpath >= 5.8.0" >&5
 echo $ECHO_N "checking for $perlpath >= 5.8.0... $ECHO_C" >&6; }
@@ -24919,37 +24925,105 @@ echo $ECHO_N "checking for $perlpath >= 5.8.0... $ECHO_C" >&6; }
 			if test "$PERL_VER" = "yes"; then
 				{ echo "$as_me:$LINENO: result: yes" >&5
 echo "${ECHO_T}yes" >&6; }
-				{ echo "$as_me:$LINENO: checking Checking for perl compiler, linker, libraries and headers" >&5
+				perl=no
-echo $ECHO_N "checking Checking for perl compiler, linker, libraries and headers... $ECHO_C" >&6; }
-	    			PERL_CC=`$perlpath -MConfig -e 'print $Config{cc},"\n";'`
-			    	PERL_LD=`$perlpath -MConfig -e 'print $Config{ld},"\n";'`
 
-				rm -f testperl$ac_exeext testperl.$ac_objext testperl.c testperl.err
-	    			cat > testperl.c <<EOF
-#include "EXTERN.h"
-#include "perl.h"
-#include "XSUB.h"
-int main () { (void)&perl_construct; return 0; }
-EOF
-				$PERL_CC $PERL_CFLAGS -c testperl.c 2>&5 &&
-	   	 		$PERL_LD -o testperl testperl.o $PERL_LDFLAGS 2>&5 &&
-	    			test -x testperl &&
-	    			have_perl=yes
-				if test "$have_perl" = "yes"; then
-					{ echo "$as_me:$LINENO: result: ok" >&5
-echo "${ECHO_T}ok" >&6; }
 
-cat >>confdefs.h <<_ACEOF
+
-#define USE_PERL 1
+for ac_header in EXTERN.h perl.h XSUB.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+{ echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; }
+if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+				#ifdef HAVE_EXTERN_H
+				#include <EXTERN.h>
+				#endif
+				#ifdef HAVE_PERL_H
+				#include <perl.h>
+				#endif
+				#ifdef HAVE_XSUB_H
+				#include <XSUB.h>
+				#endif
+
+
+
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  eval "$as_ac_Header=yes"
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	eval "$as_ac_Header=no"
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+ac_res=`eval echo '${'$as_ac_Header'}'`
+	       { echo "$as_me:$LINENO: result: $ac_res" >&5
+echo "${ECHO_T}$ac_res" >&6; }
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
 _ACEOF
 
-				else
+					perl=yes
+
+else
+
+					perl=no
 					PERL_LDFLAGS=""
 					PERL_CFLAGS=""
 					{ echo "$as_me:$LINENO: result: Failed. Perl Support Disabled. See the RELNOTES file" >&5
 echo "${ECHO_T}Failed. Perl Support Disabled. See the RELNOTES file" >&6; }
-				fi
+					break
-				rm -f testperl$ac_exeext testperl.$ac_objext testperl.c testperl.err
+
+fi
+
+done
 
 			else
 				{ echo "$as_me:$LINENO: result: no" >&5
@@ -24974,7 +25048,13 @@ else
   DO_PERL_FALSE=
 fi
 
+if test "x$perl" = "xyes"; then
 
+cat >>confdefs.h <<_ACEOF
+#define USE_PERL 1
+_ACEOF
+
+fi
 
 
 
@@ -25133,8 +25213,8 @@ unset wi_resolved_path wi_path
 	wi_cv_path_ccdv="$CCDV"
 	CC="$CCDV $CC"	# trailing space needed
 	USECCDV="#"
-	{ echo "$as_me:$LINENO: result: $ccdv" >&5
+	{ echo "$as_me:$LINENO: result: $CCDV" >&5
-echo "${ECHO_T}$ccdv" >&6; }
+echo "${ECHO_T}$CCDV" >&6; }
 else
 	wi_cv_path_ccdv=""
 	USECCDV=""

configure.in

@@ -307,6 +307,11 @@ dnl		PERL_CFLAGS=`echo $PERL_CFLAGS |$sedpath 's/-Wdeclaration-after-statement /
 			AC_MSG_RESULT([not found, building without perl.])
 			perl=no
 		else
+			AC_MSG_RESULT(ok)
+			AC_MSG_CHECKING([Checking for perl includes directory])
+			PERL_INCLUDES=`$perlpath -MExtUtils::Embed -e perl_inc 2>/dev/null`
+			AC_MSG_RESULT($PERL_INCLUDES)
+			CFLAGS="$CFLAGS "$PERL_INCLUDES
 			PERL_LDFLAGS=`$perlpath -MExtUtils::Embed -e ldopts |$sedpath 's/-lgdbm //'`
 			PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-ldb //'`
 			PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-lndbm //'`
@@ -315,38 +320,36 @@ dnl		PERL_CFLAGS=`echo $PERL_CFLAGS |$sedpath 's/-Wdeclaration-after-statement /
 				PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-lposix //'`
 			fi
 			PERL_LDFLAGS=`echo $PERL_LDFLAGS |$sedpath 's/-lc //'`
-			AC_MSG_RESULT(ok)
 
 			AC_MSG_CHECKING(for $perlpath >= 5.8.0)
 			PERL_VER=`$perlpath -e 'print $]>= 5.008?"yes":"no"'`
 
 			if test "$PERL_VER" = "yes"; then
 				AC_MSG_RESULT(yes)
-				AC_MSG_CHECKING([Checking for perl compiler, linker, libraries and headers])
+				perl=no
-	    			PERL_CC=`$perlpath -MConfig -e 'print $Config{cc},"\n";'`
+dnl				AC_MSG_CHECKING([Checking for perl compiler, linker, libraries and headers])
-			    	PERL_LD=`$perlpath -MConfig -e 'print $Config{ld},"\n";'`
+				AC_CHECK_HEADERS([EXTERN.h perl.h XSUB.h], [
-
+					perl=yes
-				rm -f testperl$ac_exeext testperl.$ac_objext testperl.c testperl.err
+				],
-	    			cat > testperl.c <<EOF
+				[
-#include "EXTERN.h"
+					perl=no
-#include "perl.h"
-#include "XSUB.h"
-int main () { (void)&perl_construct; return 0; }
-EOF
-				$PERL_CC $PERL_CFLAGS -c testperl.c 2>&5 &&
-	   	 		$PERL_LD -o testperl testperl.o $PERL_LDFLAGS 2>&5 &&
-	    			test -x testperl &&
-	    			have_perl=yes
-				if test "$have_perl" = "yes"; then
-					AC_MSG_RESULT(ok)
-					AC_DEFINE_UNQUOTED(USE_PERL, 1, 'Enable Perl Support')
-				else
 					PERL_LDFLAGS=""
 					PERL_CFLAGS=""
 					AC_MSG_RESULT([Failed. Perl Support Disabled. See the RELNOTES file])
-				fi
+					break
-				rm -f testperl$ac_exeext testperl.$ac_objext testperl.c testperl.err
+				],
-
+				[
+				#ifdef HAVE_EXTERN_H
+				#include <EXTERN.h>
+				#endif
+				#ifdef HAVE_PERL_H
+				#include <perl.h>
+				#endif
+				#ifdef HAVE_XSUB_H
+				#include <XSUB.h>
+				#endif
+				]
+				)
 			else
 				AC_MSG_RESULT(no)
 				PERL_LDFLAGS=""
@@ -360,7 +363,9 @@ EOF
 AC_SUBST(PERL_CFLAGS)
 AC_SUBST(PERL_LDFLAGS)
 AM_CONDITIONAL(DO_PERL, test "x$perl" = "xyes")
-
+if test "x$perl" = "xyes"; then
+	AC_DEFINE_UNQUOTED(USE_PERL, 1, 'Enable Perl Support')
+fi