added a test program

diff --git a/m4/freetype.m4 b/m4/freetype.m4
index 02c53ea..84dc174 100644 (file)
--- a/m4/freetype.m4
+++ b/m4/freetype.m4
@@ -3,6 +3,7 @@
 # Checks for:
 #    * freetype library (-lfreetype)
 #    * freetype headers (freetype2/freetype/freetype.h)
+#    * whether a freetype test program can be compiled
 # 
 # Environment set:
 #    * HAVE_FREETYPE
@@ -35,18 +36,77 @@ if test "x${HAVE_FREETYPE_FREETYPE_H}" != "x";then
     HAVE_FREETYPE=1
 fi
 fi
-if test "x${HAVE_FREETYPE}" != "x"; then 
+
+if test "x${HAVE_FREETYPE}" = "x1"; then 
     if test "x{$FREETYPE_CONFIG}" != "x"; then
        LIBS="$LIBS "`freetype-config --libs`
     else
        LIBS="$LIBS -lfreetype"
     fi
-    AC_DEFINE_UNQUOTED(HAVE_FREETYPE, 1)
-    AC_DEFINE_UNQUOTED(USE_FREETYPE, 1)  # for ttf2tp1
-else
-    CPPFLAGS=${OLDCPPFLAGS}
-    LIBS=${OLDLIBS}
+
+    AC_MSG_CHECKING([whether we can compile the freetype test program])
+
+    cat > conftest.c << EOF
+#include <freetype/freetype.h>
+#include <freetype/ftglyph.h>
+#include <freetype/ftsnames.h>
+#include <freetype/ttnameid.h>
+#include <freetype/ftoutln.h>
+
+int main()
+{
+    FT_Library ftlibrary;
+    FT_Face face;
+    FT_Error error;
+    FT_ULong charcode;
+    FT_UInt gindex;
+    FT_Glyph glyph;
+    FT_BBox bbox;
+    FT_Matrix matrix;
+    FT_UInt i;
+    char* name = 0;
+    char italic, bold;
+   
+    FT_Init_FreeType(&ftlibrary);
+    FT_New_Face(ftlibrary, "filename", 0, &face);
+    i = face->num_glyphs - 1;
+    italic = face->style_flags&FT_STYLE_FLAG_ITALIC;
+    bold = face->style_flags&FT_STYLE_FLAG_BOLD;
+    FT_Get_Postscript_Name(face);
+    FT_Get_Char_Index(face, 33);
+    FT_Get_First_Char(face, &i);
+    FT_Get_Next_Char(face, 33, &i);
+    if(FT_HAS_GLYPH_NAMES(face)) {
+       FT_Get_Glyph_Name(face, 33, name, 127);
+    }
+    FT_Load_Glyph(face, 33, FT_LOAD_NO_BITMAP|FT_LOAD_NO_SCALE);
+    FT_Get_Glyph(face->glyph, &glyph);
+    FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_unscaled, &bbox);
+    FT_Done_Glyph(glyph);
+    FT_Done_Face(face);
+    FT_Done_FreeType(ftlibrary);
+    return 0;
+}
+EOF
+
+    ac_link='$CC $CPPFLAGS $CFLAGS conftest.c $LIBS -o conftest${ac_exeext}'
+    if { (eval echo freetype.m4:71: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+       AC_MSG_RESULT(yes)
+       AC_DEFINE_UNQUOTED(HAVE_FREETYPE, 1)
+       AC_DEFINE_UNQUOTED(USE_FREETYPE, 1)  # for ttf2tp1
+    else
+       echo "configure: failed program was:" >&5
+       cat conftest.c >&5
+       HAVE_FREETYPE=0
+       AC_MSG_RESULT(no)
+    fi
+    rm -f conftest*
+fi
+
+# if the above didn't work out, reset all changes to the compiler variables.
+if test "x${HAVE_FREETYPE}" "!=" "x1"; then 
+    CPPFLAGS=$OLDCPPFLAGS
+    LIBS=$OLDLIBS
 fi 
-]
-)
+])