From 002b207d916c64b88a3bb691ee6c239139f49433 Mon Sep 17 00:00:00 2001
From: Tristan Gingold <tgingold@free.fr>
Date: Sat, 8 Nov 2014 11:22:17 +0100
Subject: Add instructions for llvm (WIP).

---
 configure | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'configure')

diff --git a/configure b/configure
index e869495e5..ca9baa096 100755
--- a/configure
+++ b/configure
@@ -12,12 +12,13 @@ libdirsuffix=lib/ghdl
 libdirreverse=../..
 gcc_src_dir=
 gcc_version=unknown
+llvm_prefix=
 build=
 
 show_help=no
 progname=$0
 
-subst_vars="CC GNATMAKE CFLAGS build srcdir prefix backend libdirsuffix libdirreverse gcc_src_dir"
+subst_vars="CC GNATMAKE CFLAGS build srcdir prefix backend libdirsuffix libdirreverse gcc_src_dir llvm_prefix"
 
 # Find srcdir
 srcdir=`dirname $progname`
@@ -49,6 +50,7 @@ for opt do
       --prefix=*) prefix="$optarg";;
       --srcdir=*) srcdir="$optarg";;
       --with-gcc=*) gcc_src_dir="$optarg"; backend=gcc;;
+      --with-llvm=*) llvm_prefix="$optarg"; backend=llvm;;
       -h|-help|--help) show_help=yes;;
       *) echo "$0: unknown option $opt; try $0 --help"
 	  exit 1
@@ -65,6 +67,7 @@ Options [defaults in brackets]:
   --prefix=PREFIX   install in PREFIX [$prefix]
   --srcdir=SRCDIR   source code path [$srcdir]
   --with-gcc=DIR    use gcc backend from DIR (needs gcc $gcc_version)
+  --with-llvm=DIR   use llvm installed in DIR
 EOF
 exit 0
 fi
@@ -105,6 +108,15 @@ if test $backend = gcc; then
     fi
 fi
 
+# For llvm backend, check llvm-config
+if test $backend = llvm; then
+    llvm_cmd="$llvm_prefix/bin/llvm-config --version"
+    if ! $llvm_cmd 2> /dev/null; then
+	echo "cannot run $llvm_cmd"
+	exit 1
+    fi
+fi
+
 # Compute build machine
 if test x$build = x; then
     build=`$CC $CFLAGS -dumpmachine`
-- 
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