Fix building with GHC 6.8

[ghc-hetmet.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index fa33982..8c984de 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -680,6 +680,22 @@ fi
 # Check whether this GHC has editline installed
 FP_GHC_HAS_EDITLINE
 
+# Dummy arguments to print help for --with-editline-* arguments.
+# Those are actually passed to the editline package's configure script
+# via the CONFIGURE_ARGS variable in mk/config.mk
+AC_ARG_WITH(dummy-editline-includes,
+  [AC_HELP_STRING([--with-editline-includes],
+    [directory containing editline/editline.h or editline/readline.h])],
+    [],
+    [])
+
+AC_ARG_WITH(dummy-editline-libraries,
+  [AC_HELP_STRING([--with-editline-libraries],
+    [directory containing the editline library])],
+    [],
+    [])
+
+
 AC_PATH_PROGS(NHC,nhc nhc98)
 AC_PATH_PROG(HBC,hbc)
 
@@ -1264,3 +1280,22 @@ AC_SUBST(HavePapi)
 AC_CONFIG_FILES([mk/config.mk compiler/ghc.cabal ghc/ghc-bin.cabal ghc.spec extra-gcc-opts docs/users_guide/ug-book.xml])
 AC_CONFIG_COMMANDS([mk/stamp-h],[echo timestamp > mk/stamp-h])
 AC_OUTPUT
+
+# We get caught by
+#     http://savannah.gnu.org/bugs/index.php?1516
+#     $(eval ...) inside conditionals causes errors
+# with make 3.80, so warn the user if it looks like they're about to
+# try to use it.
+checkMake380() {
+    if $1 --version 2>&1 | head -1 | grep -q 'GNU Make 3\.80'
+    then
+        echo
+        echo "WARNING: It looks like \"$1\" is GNU make 3.80."
+        echo "This version cannot be used to build GHC."
+        echo "Please use GNU make >= 3.81."
+    fi
+}
+
+checkMake380 make
+checkMake380 gmake
+