gentoo-overlay/dev-tcltk/blt/files/blt-2.5.3-darwin.patch

--- a/configure.in
+++ b/configure.in
@@ -183,9 +183,6 @@
       blt_lib_prefix=""
     fi
     ;;
-  *-*-macosx)
-    blt_platform="macosx"
-    ;;
   *)
     blt_platform="unix"
     ;;
@@ -728,6 +725,9 @@
   *-hpux*)
     SHLIB_SUFFIX="sl"
     ;;
+  *-darwin*)
+    SHLIB_SUFFIX="dylib"
+    ;;
   *)
     SHLIB_SUFFIX="so"
     ;;
@@ -1145,6 +1145,13 @@
     LDFLAGS=""
     ;;
 
+  *-darwin*)
+    SHLIB_CFLAGS=""
+    SHLIB_LD="${CC}"
+    SHLIB_LD_FLAGS='-dynamiclib -install_name $(libdir)/$@'
+    SHLIB_SUFFIX=".dylib"
+    ;;
+
   *-dgux*)
     SHLIB_CFLAGS="-K PIC"
     SHLIB_LD="cc"