Rework autoconf defines.

cpukit/libcsupport/src/calloc.c

@@ -15,7 +15,7 @@
 #include "config.h"
 #endif
 
-#ifdef RTEMS_NEWLIB
+#if defined(RTEMS_NEWLIB) && !defined(HAVE_CALLOC)
 #include "malloc_p.h"
 #include <stdlib.h>
 

cpukit/libcsupport/src/fcntl.c

@@ -172,7 +172,7 @@ int fcntl(
  *  This is the Newlib dependent reentrant version of fcntl().
  */
 
-#if defined(RTEMS_NEWLIB)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE_FCNTL_R)
 
 #include <reent.h>
 

cpukit/libcsupport/src/fstat.c

@@ -65,7 +65,7 @@ int fstat(
  *  This is the Newlib dependent reentrant version of fstat().
  */
 
-#if defined(RTEMS_NEWLIB)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE_FSTAT_R)
 
 #include <reent.h>
 

cpukit/libcsupport/src/getpid.c

@@ -31,7 +31,7 @@ pid_t getpid( void )
  *  This is the Newlib dependent reentrant version of getpid().
  */
 
-#if defined(RTEMS_NEWLIB)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE__GETPID_R)
 
 #include <reent.h>
 

cpukit/libcsupport/src/isatty_r.c

@@ -19,7 +19,7 @@
  *  This is the Newlib dependent reentrant version of isatty().
  */
 
-#if defined(RTEMS_NEWLIB)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE__ISATTY_R)
 
 #include <reent.h>
 #include <sys/stat.h>

cpukit/libcsupport/src/issetugid.c

@@ -8,8 +8,10 @@
 #include "config.h"
 #endif
 
+#if defined(RTEMS_NEWLIB) && !defined(HAVE_ISSETUGID)
 int
 issetugid (void)
 {
 	return 0;
 }
+#endif

cpukit/libcsupport/src/lseek.c

@@ -85,7 +85,7 @@ off_t lseek(
  *  This is the Newlib dependent reentrant version of lseek().
  */
 
-#if defined(RTEMS_NEWLIB)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE__LSEEK_R)
 
 #include <reent.h>
 

cpukit/libcsupport/src/read.c

@@ -55,7 +55,7 @@ ssize_t read(
  *  This is the Newlib dependent reentrant version of read().
  */
 
-#if defined(RTEMS_NEWLIB)
+#if defined(RTEMS_NEWLIB) && !defined(HAVE__READ_R)
 
 #include <reent.h>