diff -up fltk-1.3.4-1/fltk-config.in.fltk_config fltk-1.3.4-1/fltk-config.in
--- fltk-1.3.4-1/fltk-config.in.fltk_config	2016-01-30 20:49:56.000000000 -0600
+++ fltk-1.3.4-1/fltk-config.in	2017-03-04 12:29:28.910316677 -0600
@@ -44,8 +44,8 @@ CXX="@CXX@"
 
 # flags for C++ compiler:
 ARCHFLAGS="@ARCHFLAGS@"
-CFLAGS="@CFLAGS@ @LARGEFILE@ @PTHREAD_FLAGS@"
-CXXFLAGS="@CXXFLAGS@ @LARGEFILE@ @PTHREAD_FLAGS@"
+CFLAGS=""
+CXXFLAGS=""
 LDFLAGS="@LDFLAGS@"
 LDLIBS="@LIBS@"
 OPTIM="@OPTIM@"
@@ -228,7 +228,7 @@ if test "$BINARY_DIR" != ""; then
     includes="-I$BINARY_DIR $includes"
 fi
 
-if test "$libdir" != /usr/lib -a "$libdir" != /usr/lib32; then
+if test "$libdir" != /usr/lib -a "$libdir" != /usr/lib32 -a "$libdir" != /usr/lib64; then
     libs=-L$libdir
 else
     libs=
@@ -236,28 +236,28 @@ fi
 
 # Calculate needed libraries
 LDSTATIC="$libdir/libfltk.a $LDLIBS"
-LDLIBS="-lfltk$SHAREDSUFFIX $LDLIBS"
+LDLIBS="-lfltk$SHAREDSUFFIX"
 
 if test x$use_forms = xyes; then
     LDLIBS="-lfltk_forms$SHAREDSUFFIX $LDLIBS"
     LDSTATIC="$libdir/libfltk_forms.a $LDSTATIC"
 fi
 if test x$use_gl = xyes; then
-    LDLIBS="-lfltk_gl$SHAREDSUFFIX @GLLIB@ $LDLIBS"
+    LDLIBS="-lfltk_gl$SHAREDSUFFIX $LDLIBS"
     LDSTATIC="$libdir/libfltk_gl.a @GLLIB@ $LDSTATIC"
 fi
 if test x$use_images = xyes; then
-    LDLIBS="-lfltk_images$SHAREDSUFFIX $IMAGELIBS $LDLIBS"
+    LDLIBS="-lfltk_images$SHAREDSUFFIX $LDLIBS"
     LDSTATIC="$libdir/libfltk_images.a $STATICIMAGELIBS $LDSTATIC"
 fi
 
 if test x$use_cairo = xyes; then
-    LDLIBS="-lfltk_cairo$SHAREDSUFFIX $CAIROLIBS $LDLIBS"
+    LDLIBS="-lfltk_cairo$SHAREDSUFFIX $LDLIBS"
     LDSTATIC="$libdir/libfltk_cairo.a $CAIROLIBS $LDSTATIC"
 fi
 
-LDLIBS="$DSOLINK $LDFLAGS $libs $LDLIBS"
-LDSTATIC="$LDFLAGS $LDSTATIC"
+LDLIBS="$libs $LDLIBS"
+#LDSTATIC="$LDFLAGS $LDSTATIC"
 
 # Answer to user requests
 if test -n "$echo_help"; then