Add freetype detection using pkg-config.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

configure.ac

@@ -480,12 +480,33 @@ _ldflags=$LDFLAGS
 # TTF
 if test $sq_codec_ttf = yes; then
 
-AC_PATH_PROG(FREETYPE_CONFIG, freetype-config)
+if test -z "$PKGCONFIG"; then
+  KDE_FIND_PATH(pkg-config, PKGCONFIG, [${prefix}/bin ${exec_prefix}/bin /usr/bin /usr/local/bin /opt/local/bin], [
+    AC_MSG_WARN([Could not find pkg-config ])
+  ])
+fi
+
+if test -n "$PKGCONFIG"; then
+    AC_MSG_CHECKING([for freetype >= 5.0])
+    vers=`$PKGCONFIG freetype2 --modversion 2>/dev/null | $SED -e 's/libfontconfig //' | $AWK 'BEGIN { FS = "."; } { printf "%d", ($1 * 1000 + $2) * 1000 + $3;}'`
+    if test -n "$vers" && test "$vers" -ge 5000000; then
+        freetype_libs="`$PKGCONFIG freetype2 --libs`"
+        freetype_cflags="`$PKGCONFIG freetype2 --cflags`"
+        AC_MSG_RESULT(yes)
+    else
+        AC_MSG_RESULT(no)
+    fi
+fi
 
-if [ test -n "$FREETYPE_CONFIG" ]; then
+if test -z "$freetype_libs"; then
+    AC_PATH_PROG(FREETYPE_CONFIG, freetype-config)
+    if test -n "$FREETYPE_CONFIG"; then
         freetype_cflags=`$FREETYPE_CONFIG --cflags`
         freetype_libs=`$FREETYPE_CONFIG --libs`
+    fi
+fi
 
+if test -n "$freetype_libs"; then
         CPPFLAGS="$freetype_cflags $CPPFLAGS"
         LDFLAGS="$LDFLAGS $freetype_libs"