Disabled external gits

cs440-acg/ext/openexr/OpenEXR_Viewers/m4/path.cb.m4

@@ -0,0 +1,89 @@
+
+dnl
+dnl Cg support
+dnl
+
+AC_DEFUN([AM_PATH_CG],
+[dnl
+dnl Get the cflags
+dnl
+AC_ARG_WITH(cg-prefix,[  --with-cg-prefix=PFX  Prefix where Cg is installed (optional)],
+	    cg_prefix="$withval", cg_prefix="")
+
+  if test x$cg_prefix != x ; then
+    CG_CXXFLAGS="-I$cg_prefix/include"
+    CG_LDFLAGS="-L$cg_prefix/lib -lGL -lCg -lCgGL -lGLU -lpthread -lglut"
+  else
+    case $host_os in
+      darwin*)
+        CG_CXXFLAGS=""
+        CG_LDFLAGS="-framework Cg -framework AGL -framework OpenGL -framework GLUT"
+        ;;
+      *)
+        CG_CXXFLAGS=""
+        CG_LDFLAGS="-lGL -lCg -lCgGL -lGLU -lpthread -lglut"
+        ;;
+    esac
+  fi
+
+  AC_MSG_CHECKING(for Cg)
+  no_cg=""
+
+  ac_save_CXXFLAGS="$CXXFLAGS"
+  ac_save_LDFLAGS="$LDFLAGS"
+  CXXFLAGS="$CXXFLAGS $CG_CXXFLAGS"
+  LDFLAGS="$CG_LDFLAGS"
+
+  case $host_os in
+    darwin*)
+      AC_LANG_SAVE
+      AC_LANG_CPLUSPLUS
+      AC_TRY_LINK([
+    #include <OpenGL/gl.h>
+    #include <Cg/cg.h>
+    #include <Cg/cgGL.h>],
+    [
+        cgCreateContext ();
+    ],, no_cg=yes)
+    ;;
+  *)
+      AC_LANG_SAVE
+      AC_LANG_CPLUSPLUS
+      AC_TRY_LINK([
+    #include <GL/gl.h>
+    #include <Cg/cg.h>
+    #include <Cg/cgGL.h>],
+    [
+        cgCreateContext ();
+    ],, no_cg=yes)
+    ;;
+  esac
+
+  AC_LANG_RESTORE
+  CXXFLAGS="$ac_save_CXXFLAGS"
+  LDFLAGS="$ac_save_LDFLAGS"
+
+  if test "x$no_cg" = "x" ; then
+    AC_MSG_RESULT(yes)
+      ifelse([$1], , :, [$1])
+  else
+    AC_MSG_RESULT(no)
+    echo "*** The Cg test program could not be compiled."
+    echo "*** Possible reasons:"
+    echo "***     - The Cg libraries and includes are not installed."
+    echo "***     - configure cannot find Cg (use the"
+    echo "***       --with-cg-prefix option to tell configure where"
+    echo "***       to find it)."
+    echo "***     - Your version of Cg is out of date.  Please update it"
+    echo "***       to the latest version."
+    echo "***"
+    echo "*** The exrdisplay program will not be built with fragment shader"
+    echo "*** support because the fragment shader support depends on Cg."
+    CG_CXXFLAGS=""
+    CG_LDFLAGS=""
+    ifelse([$2], , :, [$2])
+  fi
+  AC_SUBST(CG_CXXFLAGS)
+  AC_SUBST(CG_LDFLAGS)
+])
+