From fa13b2838fd32854a4b2c6a5fff47e17a72294fb Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 22 Sep 2011 14:41:46 +0100
Subject: [PATCH] erlang: Use the official autoconf macros.

---
 TODO               |  6 ------
 configure.ac       | 31 +++++--------------------------
 erlang/Makefile.am |  6 +++---
 3 files changed, 8 insertions(+), 35 deletions(-)

diff --git a/TODO b/TODO
index 9fc32ef..7a4c367 100644
--- a/TODO
+++ b/TODO
@@ -532,9 +532,3 @@ libosinfo mappings for virt-inspector
 -------------------------------------
 
 Return libosinfo mappings from inspection API.
-
-Erlang bindings
----------------
-
-Use the AC_ERLANG_* autoconf macros.  See:
-https://github.com/ndim/erlusb/blob/master/configure.ac
diff --git a/configure.ac b/configure.ac
index 83f25c9..c5b7bd0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -887,42 +887,21 @@ AS_IF([test "x$enable_php" != "xno"],
 AM_CONDITIONAL([HAVE_PHP], [test "x$PHP" != "xno" && test "x$PHPIZE" != "xno"])
 
 dnl Erlang
-ERLC=no
-ERL_INTERFACEDIR=no
 AC_ARG_ENABLE([erlang],
         AS_HELP_STRING([--disable-erlang], [Disable Erlang language bindings]),
         [],
         [enable_erlang=yes])
 AS_IF([test "x$enable_erlang" != "xno"],
         [
-        ERLC=
-        AC_CHECK_PROG([ERLC],[erlc],[erlc],[no])
+        AC_ERLANG_PATH_ERLC([no])
 
         if test "x$ERLC" != "xno"; then
-            dnl Look for erl_interface directory in various places.
-            AC_MSG_CHECKING([for erl_interface])
-
-            for d in \
-                $libdir /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64
-            do
-                dir=`ls -1d $d/erlang/lib/erl_interface-* 2>/dev/null`
-                if test "x$dir" != "x" && test -d "$dir"; then
-                    AC_MSG_RESULT([$dir])
-                    ERL_INTERFACEDIR=$dir
-                    break
-                fi
-            done
-
-            if test "x$ERL_INTERFACEDIR" = "xno"; then
-                AC_MSG_RESULT([not found])
-            fi
+            AC_ERLANG_CHECK_LIB([erl_interface], [],
+                                [AC_MSG_FAILURE([Erlang erl_interface library not installed.  Use --disable-erlang to disable.])])
+            AC_ERLANG_SUBST_LIB_DIR
         fi
-
-        AC_SUBST([ERLC])
-        AC_SUBST([ERL_INTERFACEDIR])
         ])
-AM_CONDITIONAL([HAVE_ERLANG],
-        [test "x$ERLC" != "xno" && test "x$ERL_INTERFACEDIR" != "xno"])
+AM_CONDITIONAL([HAVE_ERLANG], [test "x$ERLC" != "xno"])
 
 dnl Check for Perl modules needed by Perl virt tools (virt-df, etc.)
 AS_IF([test "x$PERL" != "xno"],
diff --git a/erlang/Makefile.am b/erlang/Makefile.am
index 933e602..d262f87 100644
--- a/erlang/Makefile.am
+++ b/erlang/Makefile.am
@@ -41,12 +41,12 @@ erl_guestfs_SOURCES = erl-guestfs.c erl-guestfs-proto.c
 erl_guestfs_CFLAGS = \
 	-I$(top_srcdir)/src -I$(top_builddir)/src \
 	-I$(srcdir)/../gnulib/lib -I../gnulib/lib \
-	-I$(ERL_INTERFACEDIR)/include \
+	-I$(ERLANG_LIB_DIR_erl_interface)/include \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS)
 
 erl_guestfs_LDADD = \
-	$(ERL_INTERFACEDIR)/lib/liberl_interface.a \
-	$(ERL_INTERFACEDIR)/lib/libei.a \
+	$(ERLANG_LIB_DIR_erl_interface)/lib/liberl_interface.a \
+	$(ERLANG_LIB_DIR_erl_interface)/lib/libei.a \
 	-lpthread \
 	$(top_builddir)/src/libguestfs.la \
 	../gnulib/lib/libgnu.la
-- 
1.8.3.1