[HOpenGL] bug in package.conf (ghci -package OpenGL / ghci -package GLUT)

[Marc A. Ziegert]

there still exist systems/programs that need a strict sequence of .so files to link. i.e. at least ghci on i386-gnu-linux.

coeus at titan ~ $ ghci -package GLUT
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.2, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base ... linking ... done.
Loading package OpenGL ... ghc-6.2: can't load .so/.DLL for: GLU (/usr/lib/libGL                            U.so: undefined symbol: glPixelStorei)
coeus at titan ~ $


problem to link GLU, because GL has not been linked before.
it happens in the package OpenGL, because it is in the package_deps of GLUT.
GLUT's libraries would have the same problem, but --because of package_deps-- GL and GLU must have been linked before. unnecessary to link them again.

it is:

 Package
    {name = "OpenGL",
     package_deps = ["base"],
     extra_ld_opts =
       ["-lGLU",
	"-lGL",
 Package
    {name = "GLUT",
     package_deps = ["base", "OpenGL"],
     extra_ld_opts =
       ["-lglut",
	"-lGLU",
	"-lGL",

and should be:

 Package
    {name = "OpenGL",
     package_deps = ["base"],
     extra_ld_opts =
       ["-lGL",
	"-lGLU",
 Package
    {name = "GLUT",
     package_deps = ["base", "OpenGL"],
     extra_ld_opts =
       [	"-lglut",