From 148fe4faebc8bde13dc9e4429e687f752a6d3cde Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@huhu.verplant.org>
Date: Fri, 3 Oct 2008 13:30:58 +0200
Subject: [PATCH] build.sh: Check for more (all?) programs needed.

---
 build.sh | 49 +++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 39 insertions(+), 10 deletions(-)

diff --git a/build.sh b/build.sh
index cede2e48..3822c2bc 100755
--- a/build.sh
+++ b/build.sh
@@ -1,19 +1,48 @@
 #! /bin/sh
 
-if ! which lex > /dev/null 2>&1; then
-	echo "WARNING: lex not found!" >&2
-	echo "Make sure that you have a flex compatible tool available." >&2
-fi
+GLOBAL_ERROR_INDICATOR=0
 
-if ! which yacc > /dev/null 2>&1; then
-	echo "WARNING: yacc not found!" >&2
-	echo "Make sure that you have a GNU bison compatible tool available." >&2
-fi
+check_for_application ()
+{
+	for PROG in "$@"
+	do
+		if ! which "$PROG" >/dev/null 2>&1; then
+			cat >&2 <<EOF
+WARNING: \`$PROG' not found!
+    Please make sure that \`$PROG' is installed and is in one of the
+    directories listed in the PATH environment variable.
+EOF
+			GLOBAL_ERROR_INDICATOR=1
+		fi
+	done
+}
 
-libtoolize=libtoolize
+check_for_application lex yacc autoheader aclocal automake autoconf
 
-if which glibtoolize > /dev/null 2>&1; then
+# Actually we don't need the pkg-config executable, but we need the M4 macros.
+# We check for `pkg-config' here and hope that M4 macros will then be
+# available, too.
+check_for_application pkg-config
+
+libtoolize=""
+if which libtoolize >/dev/null 2>&1
+then
+	libtoolize=libtoolize
+else if which glibtoolize >/dev/null 2>&1
+then
 	libtoolize=glibtoolize
+else
+	cat >&2 <<EOF
+WARNING: Neither \`libtoolize' nor \`glibtoolize' have been found!
+    Please make sure that one of them is installed and is in one of the
+    directories listed in the PATH environment variable.
+EOF
+	GLOBAL_ERROR_INDICATOR=1
+fi; fi
+
+if test "$GLOBAL_ERROR_INDICATOR" != "0"
+then
+	exit 1
 fi
 
 set -x
-- 
2.11.0