From afa28e0364b5132f3473ff08d9bca2026e723b41 Mon Sep 17 00:00:00 2001
From: Jan Blunck <jblunck@suse.de>
Date: Wed, 10 Jun 2009 20:07:14 +0200
Subject: [PATCH] Modify buildsystem to be able to compile with installed
 libraries

---
 configure.ac       | 35 ++++++++++++++++++++++++++++++-----
 hello/Makefile.am  |  2 +-
 libust/Makefile.am |  4 ++--
 3 files changed, 33 insertions(+), 8 deletions(-)

diff --git a/configure.ac b/configure.ac
index a7f9a73..213e4a0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,13 +49,38 @@ AC_C_INLINE
 AC_FUNC_MALLOC
 AC_CHECK_FUNCS([gettimeofday munmap socket strerror strtol])
 
-AC_ARG_WITH(urcu, [  --with-urcu=path	Path to userspace RCU library source], URCU_PATH="$withval", AC_MSG_ERROR([Must specify liburcu path.]))
-AC_CHECK_FILE("$URCU_PATH/urcu.h", , AC_MSG_ERROR([Cannot find urcu.h in liburcu directory]))
-AC_ARG_WITH(kcompat, [  --with-kcompat=path	Path to libkcompat source], KCOMPAT_PATH="$withval", AC_MSG_ERROR([Must specify libkcompat path.]))
-AC_CHECK_FILE("$KCOMPAT_PATH/kcompat.h", , AC_MSG_ERROR([Cannot find kcompat.h in libkcompat directory]))
-AC_SUBST(URCU_PATH)
+KCOMPAT_PATH=
+AC_ARG_WITH(kcompat, [  --with-kcompat path	Path to userspace kcompat source], [
+	AC_CHECK_FILE(["$withval/kcompat.h"], KCOMPAT_PATH="$withval", [
+		AC_MSG_ERROR([Cannot find kcompat.h in kcompat directory])
+	])
+])
+if test -n "${KCOMPAT_PATH}" ; then
+   CPPFLAGS="-I$KCOMPAT_PATH/ $CPPFLAGS"
+   AC_SUBST(CPPFLAGS)
+fi
+AC_CHECK_HEADER([kcompat.h], , AC_MSG_ERROR([Must specify kcompat path.]))
 AC_SUBST(KCOMPAT_PATH)
 
+URCU_LIB=
+AC_CHECK_HEADER([urcu.h], [
+	AC_CHECK_LIB(urcu, synchronize_rcu, [
+		URCU_PATH=
+		URCU_LIB="-lurcu"
+	])
+])
+AC_ARG_WITH(urcu, [  --with-urcu path	Path to userspace RCU source], [
+	AC_CHECK_FILE(["$withval/urcu.h"], [
+		URCU_PATH="$withval"
+		URCU_LIB="/liburcu.la" ],
+		AC_MSG_ERROR([Cannot find urcu.h in urcu directory]))
+])
+if test -z "${URCU_LIB}" ; then
+   AC_MSG_ERROR([Must specify urcu path.])
+fi
+AC_SUBST(URCU_PATH)
+AC_SUBST(URCU_LIB)
+
 #AC_CONFIG_FILES([Makefile
 #                 hello/Makefile
 #                 libmallocwrap/Makefile
diff --git a/hello/Makefile.am b/hello/Makefile.am
index f682130..63e30b1 100644
--- a/hello/Makefile.am
+++ b/hello/Makefile.am
@@ -1,6 +1,6 @@
 noinst_PROGRAMS = hello
 hello_SOURCES = hello.c tp.c tp.h
-hello_LDADD = $(top_builddir)/libust/libust.la @URCU_PATH@/liburcu.so
+hello_LDADD = $(top_builddir)/libust/libust.la @URCU_PATH@@URCU_LIB@
 
 INCLUDES = -I$(top_builddir)/share
 INCLUDES += -I@URCU_PATH@
diff --git a/libust/Makefile.am b/libust/Makefile.am
index d2a8187..60687a9 100644
--- a/libust/Makefile.am
+++ b/libust/Makefile.am
@@ -1,7 +1,7 @@
 lib_LTLIBRARIES = libust.la
 libust_la_SOURCES = marker.c marker.h tracepoint.c tracepoint.h immediate.h channels.c channels.h marker-control.c marker-control.h relay.c relay.h tracer.c tracer.h tracercore.c tracercore.h serialize.c tracectl.c $(top_builddir)/libustcomm/ustcomm.c $(top_builddir)/share/kref.c $(top_builddir)/share/usterr.c
-libust_la_LIBADD = @URCU_PATH@/liburcu.so
-libust_la_LDFLAGS = -lpthread
+libust_la_LDFLAGS = -no-undefined -version-info 0:0:0
+libust_la_LIBADD = @URCU_PATH@@URCU_LIB@ -lpthread
 
 INCLUDES = -I$(top_builddir)/share
 INCLUDES += -I$(top_builddir)/libustcomm
-- 
2.34.1