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[Libguestfs] [PATCH libguestfs] build: revive the ocaml package tests



This reinstates the autogen.sh-based test for the two
required ocaml packages.

I've tested it by running autoconf.sh first with neither
of the two packages installed, then with only ocaml-xml-light
installed.  In both cases, autogen.sh failed as required.
When both were installed, it worked as expected.

>From 825d855b225c7c76371c72eae4d505a32c374007 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering redhat com>
Date: Thu, 12 Nov 2009 11:34:08 +0100
Subject: [PATCH libguestfs] build: revive the ocaml package tests

* autogen.sh: Generalize the ocaml-package-existence test.
Remove the git-related part of the old test.
---
 autogen.sh |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/autogen.sh b/autogen.sh
index 9c73a2d..b31ec7b 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -42,6 +42,32 @@ if [ ! -z "$BUILDDIR" ]; then
     CONFIGUREDIR=..
 fi

+# Ensure that an ocaml package is present for build-from sources.
+# This is *not* for anything that is required at configure-time
+# when configure is run from a distribution tarball.  From those,
+# nothing ocaml-related is required.
+# ocamlfind cannot detect the presence of -devel packages directly,
+# so if $pkg ends in -devel, first check for the base package, and
+# if that's found, check for the existence of $base.cmxa in the
+# resulting directory.
+require_ocaml_pkg()
+{
+  pkg=$1
+  case $pkg in
+    *-devel)
+      local base=${pkg%%-devel}
+      local dir=$(ocamlfind query "$base") || return 1
+      test -f "$dir/$base.cmxa" || return 1
+      ;;
+    *) ocamlfind query "$pkg" > /dev/null 2>&1 || return 1;;
+  esac
+  return 0
+}
+
+{ require_ocaml_pkg xml-light && require_ocaml_pkg xml-light-devel; } \
+  || { echo "you must have ocaml, ocamlfind, ocaml-xml-light" \
+         "and ocaml-xml-light-devel" >&2; exit 1; }
+
 # If no arguments were specified and configure has run before, use the previous
 # arguments
 if [ $# == 0 -a -x ./config.status ]; then
--
1.6.5.2.372.gc0502


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