segfault with debug enabled on mingw in mouse.c

[Benjamin L. <lin...@gm...>]

Hello,

I tried to build a debug version of the current development sources 
using mingw32.
The compiled version segfaults reproducably in mouse.c. Looking at the 
code I see that the FPRINTF macro is missing stderr as target stream

diff -r cbcfbb8c12b7 src/mouse.c
--- a/src/mouse.c	Sat Feb 21 18:22:30 2009 +0100
+++ b/src/mouse.c	Sun Feb 22 15:28:11 2009 +0100
@@ -299,7 +299,7 @@
  MousePosToGraphPosReal(int xx, int yy, double *x, double *y, double 
*x2, double *y2)
  {
      if (!is_3d_plot) {
-	FPRINTF(("POS: plot_bounds.xleft=%i, plot_bounds.xright=%i, 
plot_bounds.ybot=%i, plot_bounds.ytop=%i\n",
+	FPRINTF((stderr, "POS: plot_bounds.xleft=%i, plot_bounds.xright=%i, 
plot_bounds.ybot=%i, plot_bounds.ytop=%i\n",
  		 plot_bounds.xleft, plot_bounds.xright, plot_bounds.ybot, 
plot_bounds.ytop));

  	if (plot_bounds.xright == plot_bounds.xleft)
@@ -314,7 +314,7 @@
  	    *y = AXIS_MAPBACK(FIRST_Y_AXIS, yy);
  	    *y2 = AXIS_MAPBACK(SECOND_Y_AXIS, yy);
  	}
-	FPRINTF(("POS: xx=%i, yy=%i  =>  x=%g  y=%g\n", xx, yy, *x, *y));
+	FPRINTF((stderr, "POS: xx=%i, yy=%i  =>  x=%g  y=%g\n", xx, yy, *x, *y));

      } else {
  	/* for 3D plots, we treat the mouse position as if it is


I also would suggest to add -DDEBUG to CFLAGS in makegile.mgw for a 
debug-enabled build. Then one can issue simply
   make -f config/makefile.mgw DEBUG=1
to generate a version with debugging enabled

diff -r cbcfbb8c12b7 config/makefile.mgw
--- a/config/makefile.mgw	Sat Feb 21 18:22:30 2009 +0100
+++ b/config/makefile.mgw	Sun Feb 22 15:28:11 2009 +0100
@@ -170,7 +170,7 @@
  CP = cp -p

  ifdef DEBUG
-  CFLAGS += -g
+  CFLAGS += -g -DDEBUG
    LDFLAGS += -g
  else
    CFLAGS += -O2


benjamin