From bc3291f1614a559dba09d5360e48211ed334321a Mon Sep 17 00:00:00 2001
From: simonmar <unknown>
Date: Mon, 11 Oct 2004 14:25:46 +0000
Subject: [PATCH] [project @ 2004-10-11 14:25:44 by simonmar] Detect whether
 $(GHC) supports the readline package.

---
 aclocal.m4      |   13 +++++++++++++
 configure.ac    |    3 +++
 mk/config.mk.in |    3 +++
 3 files changed, 19 insertions(+)

diff --git a/aclocal.m4 b/aclocal.m4
index eac0625..d660017 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -694,6 +694,19 @@ ifelse($#, [1], [dnl
 ])dnl
 
 
+AC_DEFUN(FPTOOLS_GHC_HAS_READLINE,
+[AC_CACHE_CHECK([whether ghc has readline package], [fptools_ghc_has_readline],
+[if "${GhcPkgCmd-ghc-pkg}" --show-package readline >/dev/null 2>&1; then
+    fptools_ghc_has_readline='yes';
+    GhcHasReadline='YES';
+ else
+    fptools_ghc_has_readline='no';
+    GhcHasReadline='NO';
+ fi
+ AC_SUBST(GhcHasReadline)
+])
+])
+
 dnl ** Map an arithmetic C type to a Haskell type.
 dnl    Based on autconf's AC_CHECK_SIZEOF.
 
diff --git a/configure.ac b/configure.ac
index 81ac4fc..491e596 100644
--- a/configure.ac
+++ b/configure.ac
@@ -864,6 +864,9 @@ FP_PROG_FO_PROCESSOR
 dnl ** check for ghc-pkg command
 FP_PROG_GHC_PKG
 
+dnl Check whether this GHC has readline installed
+FPTOOLS_GHC_HAS_READLINE
+
 AC_ARG_WITH(greencard,
 [AC_HELP_STRING([--with-greencard=ARG],
         [Use ARG as the path to greencard  [default=autodetct]])],
diff --git a/mk/config.mk.in b/mk/config.mk.in
index 0b54097..e0b3295 100644
--- a/mk/config.mk.in
+++ b/mk/config.mk.in
@@ -729,6 +729,9 @@ else
 GhcCanonVersion = $(GhcMajVersion)$(GhcMinVersion)
 endif
 
+# Set to YES if $(GHC) has the readline package installed
+GhcHasReadline	= @GhcHasReadline@
+
 HBC		= @HBC@
 NHC		= @NHC@
 
-- 
1.7.10.4