Use bootstrap script from libcaca; our current version is outdated. Closes #4.

bootstrap

@@ -1,14 +1,14 @@
 #! /bin/sh
 
-# bootstrap: generic bootstrap/autogen.sh script for autotools projects
+# bootstrap — generic bootstrap/autogen.sh script for autotools projects
 #
-# Copyright (c) 2002-2010 Sam Hocevar <sam@hocevar.net>
+# Copyright © 2002—2015 Sam Hocevar <sam@hocevar.net>
 #
 # This program is free software. It comes without any warranty, to
 # the extent permitted by applicable law. You can redistribute it
-#    and/or modify it under the terms of the Do What The Fuck You Want
-#    To Public License, Version 2, as published by Sam Hocevar. See
-#    http://www.wtfpl.net/ for more details.
+# and/or modify it under the terms of the Do What the Fuck You Want
+# to Public License, Version 2, as published by the WTFPL Task Force.
+# See http://www.wtfpl.net/ for more details.
 #
 # The latest version of this script can be found at the following place:
 #    http://caca.zoy.org/wiki/build
@@ -36,27 +36,15 @@ aclocalflags="`sed -ne 's/^[ \t]*ACLOCAL_AMFLAGS[ \t]*=//p' Makefile.am 2>/dev/n
 
 # Check for automake
 amvers="no"
-for v in 13 12 11 10 9 8 7 6 5; do
-  if automake-1.${v} --version >/dev/null 2>&1; then
-    amvers="-1.${v}"
-    break
-  elif automake1.${v} --version >/dev/null 2>&1; then
-    amvers="1.${v}"
+for v in "" "-1.15" "-1.14" "-1.13" "-1.12" "-1.11"; do
+  if automake${v} --version > /dev/null 2>&1; then
+    amvers=${v}
     break
   fi
 done
 
-if test "${amvers}" = "no" && automake --version > /dev/null 2>&1; then
-  amvers="`automake --version | sed -e '1s/[^0-9]*//' -e q`"
-  if expr "$amvers" "<" "1.5" > /dev/null 2>&1; then
-    amvers="no"
-  else
-    amvers=""
-  fi
-fi
-
 if test "$amvers" = "no"; then
-  echo "$0: you need automake version 1.5 or later"
+  echo "$0: automake not found"
   exit 1
 fi
 
@@ -70,7 +58,7 @@ for v in "" "259" "253"; do
 done
 
 if test "$acvers" = "no"; then
-  echo "$0: you need autoconf"
+  echo "$0: autoconf not found"
   exit 1
 fi
 
@@ -89,7 +77,7 @@ if test "$libtool" = "yes"; then
   fi
 
   if test "$libtoolize" = "no"; then
-    echo "$0: you need libtool"
+    echo "$0: libtool not found"
     exit 1
   fi
 fi
@@ -97,7 +85,7 @@ fi
 # Check for pkg-config
 if test "$pkgconfig" = "yes"; then
   if ! pkg-config --version >/dev/null 2>&1; then
-    echo "$0: you need pkg-config"
+    echo "$0: pkg-config not found"
     exit 1
   fi
 fi