build: Add ./configure --disable-haskell option.

This disables the Haskell language bindings.
(cherry picked from commit ada875642332b56acbf75d68e964f2f16ca50530)

diff --git a/configure.ac b/configure.ac
index 3e15ad3..e85c998 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -763,8 +763,16 @@ AC_SUBST(JNI_VERSION_INFO)
 AM_CONDITIONAL([HAVE_JAVA],[test -n "$JAVAC"])
 
 dnl Check for Haskell (GHC).
-AC_CHECK_PROG([GHC],[ghc],[ghc],[no])
-
+GHC=no
+AC_ARG_ENABLE([haskell],
+        AS_HELP_STRING([--disable-haskell], [Disable Haskell language bindings]),
+        [],
+        [enable_haskell=yes])
+AS_IF([test "x$enable_haskell" != "xno"],
+        [
+        GHC=
+        AC_CHECK_PROG([GHC],[ghc],[ghc],[no])
+        ])
 AM_CONDITIONAL([HAVE_HASKELL],
     [test "x$GHC" != "xno"])