* Test whether "libcursesw" actually exists before symlinking to it.

(Does it ever exist?)

svn path=/nixpkgs/trunk/; revision=12710

pkgs/development/libraries/ncurses/default.nix

@@ -2,19 +2,31 @@
 
 stdenv.mkDerivation {
   name = "ncurses-5.6";
+  
   src = fetchurl {
     url = mirror://gnu/ncurses/ncurses-5.6.tar.gz;
     md5 = "b6593abe1089d6aab1551c105c9300e3";
   };
-  configureFlags="--with-shared --includedir=\${out}/include"+(if unicode then  " --enable-widec " else " ") +" --without-debug";
+  
+  configureFlags =
+    "--with-shared --includedir=\${out}/include" +
+    (if unicode then " --enable-widec " else " ") +
+    " --without-debug";
+    
   preBuild = ''sed -e "s@\([[:space:]]\)sh @\1''${SHELL} @" -i */Makefile Makefile'';
-  postInstall= if unicode then "
+
+  # When building a wide-character (Unicode) build, create backward
+  # compatibility links from the the "normal" libraries to the
+  # wide-character libraries (e.g. libncurses.so to libncursesw.so).
+  postInstall = if unicode then "
     chmod -v 644 $out/lib/libncurses++w.a
     for lib in curses ncurses form panel menu; do
-      rm -vf $out/lib/lib\${lib}.so
-      echo \"INPUT(-l\${lib}w)\" > $out/lib/lib\${lib}.so
-      ln -svf lib\${lib}w.a $out/lib/lib\${lib}.a
-      ln -svf lib\${lib}w.so.5 $out/lib/lib\${lib}.so.5
+      if test -e $out/lib/lib\${lib}w.a; then
+        rm -vf $out/lib/lib\${lib}.so
+        echo \"INPUT(-l\${lib}w)\" > $out/lib/lib\${lib}.so
+        ln -svf lib\${lib}w.a $out/lib/lib\${lib}.a
+        ln -svf lib\${lib}w.so.5 $out/lib/lib\${lib}.so.5
+      fi
     done;
   " else "";
 }