Fix #81032: GD install is affected by external libgd installation

This PR replaces the bundled libgd includes from #include <foo.h> with
#include "foo.h" for gd-related headers to avoid including headers that
may be available in system directories instead of the expected local
headers.

Closes GH-6975.

NEWS

@@ -18,6 +18,10 @@ PHP                                                                        NEWS
   . Fixed bug #80901 (Info leak in ftp extension). (cmb)
   . Fixed bug #79100 (Wrong FTP error messages). (cmb)
 
+- GD:
+  . Fixed bug #81032 (GD install is affected by external libgd installation).
+    (Flavio Heleno, cmb)
+
 - MBString:
   . Fixed bug #81011 (mb_convert_encoding removes references from arrays). (cmb)
 

ext/gd/gd.c

@@ -60,6 +60,15 @@
 
 static int le_gd, le_gd_font;
 
+#ifdef HAVE_GD_BUNDLED
+# include "libgd/gd.h"
+# include "libgd/gd_errors.h"
+# include "libgd/gdfontt.h"  /* 1 Tiny font */
+# include "libgd/gdfonts.h"  /* 2 Small font */
+# include "libgd/gdfontmb.h" /* 3 Medium bold font */
+# include "libgd/gdfontl.h"  /* 4 Large font */
+# include "libgd/gdfontg.h"  /* 5 Giant font */
+#else
 # include <gd.h>
 # include <gd_errors.h>
 # include <gdfontt.h>  /* 1 Tiny font */
@@ -67,6 +76,7 @@ static int le_gd, le_gd_font;
 # include <gdfontmb.h> /* 3 Medium bold font */
 # include <gdfontl.h>  /* 4 Large font */
 # include <gdfontg.h>  /* 5 Giant font */
+#endif
 
 #if defined(HAVE_GD_FREETYPE) && defined(HAVE_GD_BUNDLED)
 # include <ft2build.h>

ext/gd/libgd/gd_crop.c

@@ -19,11 +19,12 @@
  *  (end code)
  **/
 
-#include <gd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
 
+#include "gd.h"
+
 static int gdGuessBackgroundColorFromCorners(gdImagePtr im, int *color);
 static int gdColorMatch(gdImagePtr im, int col1, int col2, float threshold);
 

ext/gd/libgd/gd_interpolation.c

@@ -58,7 +58,7 @@ TODO:
 #include <string.h>
 #include <math.h>
 
-#include <gd.h>
+#include "gd.h"
 #include "gdhelpers.h"
 
 #ifdef _MSC_VER

ext/gd/libgd/gd_wbmp.c

@@ -51,13 +51,13 @@
    ----------------------------------------------------------------------------
  */
 
-#include <gd.h>
-#include <gdfonts.h>
-#include <gd_errors.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <limits.h>
 
+#include "gd.h"
+#include "gdfonts.h"
+#include "gd_errors.h"
 #include "wbmp.h"