Protecting "errno" in case it is not defined per e-mail from Vincent R dated 5:37 AM, October 3, 2009.

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@834 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/src/freeglut_init.c

@@ -683,7 +683,9 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
     /* will return true for VC8 (VC2005) and higher */
 #if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
     size_t sLen;
+#if HAVE_ERRNO
     errno_t err;
+#endif
 #endif
 
     if( fgState.Initialised )
@@ -706,7 +708,7 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
 #ifndef _WIN32_WCE
     {
     /* will return true for VC8 (VC2005) and higher */
-#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
+#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 ) && HAVE_ERRNO
         char* fps = NULL;
         err = _dupenv_s( &fps, &sLen, "GLUT_FPS" );
         if (err)
@@ -725,13 +727,13 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
                 fgState.FPSInterval = interval;
         }
     /* will return true for VC8 (VC2005) and higher */
-#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
+#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 ) && HAVE_ERRNO
         free ( fps );  fps = NULL;  /* dupenv_s allocates a string that we must free */
 #endif
     }
 
     /* will return true for VC8 (VC2005) and higher */
-#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
+#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 ) && HAVE_ERRNO
     err = _dupenv_s( &displayName, &sLen, "DISPLAY" );
     if (err)
         fgError("Error getting DISPLAY environment variable");
@@ -823,7 +825,7 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
      */
     fghInitialize( displayName );
     /* will return true for VC8 (VC2005) and higher */
-#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
+#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 ) && HAVE_ERRNO
     free ( displayName );  displayName = NULL;  /* dupenv_s allocates a string that we must free */
 #endif
 

freeglut/freeglut/src/freeglut_input_devices.c

@@ -36,7 +36,9 @@
 #include "freeglut_internal.h"
 
 #if TARGET_HOST_POSIX_X11
+#if HAVE_ERRNO
 #include <errno.h>
+#endif
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <time.h>
@@ -139,7 +141,7 @@ void fgInitialiseInputDevices ( void )
     if( !fgState.InputDevsInitialised )
     {
       /* will return true for VC8 (VC2005) and higher */
-#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
+#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 ) && HAVE_ERRNO
         char *dial_device=NULL;
         size_t sLen;
         errno_t err = _dupenv_s( &dial_device, &sLen, "GLUT_DIALS_SERIAL" );
@@ -166,7 +168,7 @@ void fgInitialiseInputDevices ( void )
         if ( !dial_device ) return;
         if ( !( dialbox_port = serial_open ( dial_device ) ) ) return;
       /* will return true for VC8 (VC2005) and higher */
-#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 )
+#if TARGET_HOST_MS_WINDOWS && ( _MSC_VER >= 1400 ) && HAVE_ERRNO
         free ( dial_device );  dial_device = NULL;  /* dupenv_s allocates a string that we must free */
 #endif
         serial_putchar(dialbox_port,DIAL_INITIALIZE);

freeglut/freeglut/src/freeglut_joystick.c

@@ -75,7 +75,9 @@
 #    if HAVE_FCNTL_H
 #        include <fcntl.h>
 #    endif
+#    if HAVE_ERRNO
 #        include <errno.h>
+#    endif
 #    if defined(__FreeBSD__) || defined(__NetBSD__)
 /* XXX The below hack is done until freeglut's autoconf is updated. */
 #        define HAVE_USB_JS    1
@@ -237,12 +239,15 @@ static int fghJoystickFindUSBdev(char *name, char *out, int outlen)
       close(f);
       if (cp)
         return 1;
-    } else if (errno == EACCES) {
+    }
+#if HAVE_ERRNO
+    else if (errno == EACCES) {
       if (!protection_warned) {
         fgWarning ( "Can't open %s for read!", buf );
         protection_warned = 1;
       }
     }
+#endif
   }
   return 0;
 }
@@ -260,7 +265,11 @@ static int fghJoystickInitializeHID(struct os_specific_s *os,
 
     if ( ( rd = hid_get_report_desc( os->fd ) ) == 0 )
     {
+#if HAVE_ERRNO
         fgWarning ( "error: %s: %s", os->fname, strerror( errno ) );
+#else
+        fgWarning ( "error: %s", os->fname );
+#endif
         return FALSE;
     }
 
@@ -270,7 +279,11 @@ static int fghJoystickInitializeHID(struct os_specific_s *os,
         if( ioctl( os->fd, USB_GET_REPORT_ID, &report_id ) < 0)
         {
             /*** XXX {report_id} may not be the right variable? ***/
+#if HAVE_ERRNO
             fgWarning ( "error: %s%d: %s", UHIDDEV, report_id, strerror( errno ) );
+#else
+            fgWarning ( "error: %s%d", UHIDDEV, report_id );
+#endif
             return FALSE;
         }
 
@@ -663,7 +676,11 @@ static void fghJoystickRawRead( SFG_Joystick* joy, int* buttons, float* axes )
             }
         }
     }
+#if HAVE_ERRNO
     if ( len < 0 && errno != EAGAIN )
+#else
+    if ( len < 0 )
+#endif
     {
         perror( joy->os->fname );
         joy->error = 1;
@@ -682,6 +699,7 @@ static void fghJoystickRawRead( SFG_Joystick* joy, int* buttons, float* axes )
 
         if ( status != sizeof( struct js_event ) )
         {
+#if HAVE_ERRNO
             if ( errno == EAGAIN )
             {
                 /* Use the old values */
@@ -692,6 +710,7 @@ static void fghJoystickRawRead( SFG_Joystick* joy, int* buttons, float* axes )
                             sizeof( float ) * joy->num_axes );
                 return;
             }
+#endif
 
             fgWarning ( "%s", joy->fname );
             joy->error = GL_TRUE;
@@ -1298,8 +1317,10 @@ static void fghJoystickOpen( SFG_Joystick* joy )
 
     joy->os->fd = open( joy->os->fname, O_RDONLY | O_NONBLOCK);
 
+#if HAVE_ERRNO
     if( joy->os->fd < 0 && errno == EACCES )
         fgWarning ( "%s exists but is not readable by you", joy->os->fname );
+#endif
 
     joy->error =( joy->os->fd < 0 );
 

freeglut/freeglut/src/freeglut_main.c

@@ -27,7 +27,9 @@
 
 #include <GL/freeglut.h>
 #include "freeglut_internal.h"
-#include <errno.h>
+#if HAVE_ERRNO
+#    include <errno.h>
+#endif
 #include <stdarg.h>
 #if  HAVE_VPRINTF
 #    define VFPRINTF(s,f,a) vfprintf((s),(f),(a))
@@ -471,8 +473,10 @@ static void fghSleepForEvents( void )
         wait.tv_usec = (msec % 1000) * 1000;
         err = select( socket+1, &fdset, NULL, NULL, &wait );
 
+#if HAVE_ERRNO
         if( ( -1 == err ) && ( errno != EINTR ) )
             fgWarning ( "freeglut select() error: %d", errno );
+#endif
     }
 #elif TARGET_HOST_MS_WINDOWS
     MsgWaitForMultipleObjects( 0, NULL, FALSE, msec, QS_ALLINPUT );