[libvirt] [PATCH 2/2 v3] Check for --no-copy-dt-needed linker flag

[Guido Günther]

and use it when available
---
 configure.ac                  |  1 +
 daemon/Makefile.am            |  1 +
 m4/virt-linker-no-indirect.m4 | 30 ++++++++++++++++++++++++++++++
 src/Makefile.am               |  1 +
 tests/Makefile.am             |  1 +
 tools/Makefile.am             |  1 +
 6 files changed, 35 insertions(+)
 create mode 100644 m4/virt-linker-no-indirect.m4

diff --git a/configure.ac b/configure.ac
index ac8cfa1..25d91ce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -160,6 +160,7 @@ AC_MSG_RESULT([$VERSION_SCRIPT_FLAGS])
 LIBVIRT_COMPILE_WARNINGS
 LIBVIRT_COMPILE_PIE
 LIBVIRT_LINKER_RELRO
+LIBVIRT_LINKER_NO_INDIRECT
 
 LIBVIRT_CHECK_APPARMOR
 LIBVIRT_CHECK_ATTR
diff --git a/daemon/Makefile.am b/daemon/Makefile.am
index 5cd95aa..e34868b 100644
--- a/daemon/Makefile.am
+++ b/daemon/Makefile.am
@@ -129,6 +129,7 @@ libvirtd_LDFLAGS =					\
 	$(PIE_LDFLAGS)					\
 	$(RELRO_LDFLAGS)				\
 	$(COVERAGE_LDFLAGS)				\
+	$(NO_INDIRECT_LDFLAGS)				\
 	$(NULL)
 
 libvirtd_LDADD =					\
diff --git a/m4/virt-linker-no-indirect.m4 b/m4/virt-linker-no-indirect.m4
new file mode 100644
index 0000000..2ccd960
--- /dev/null
+++ b/m4/virt-linker-no-indirect.m4
@@ -0,0 +1,30 @@
+dnl
+dnl Check for --no-copy-dt-needed-entries
+dnl
+dnl Copyright (C) 2013 Guido Günther <agx at sigxcpu.org>
+dnl
+dnl This library is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU Lesser General Public
+dnl License as published by the Free Software Foundation; either
+dnl version 2.1 of the License, or (at your option) any later version.
+dnl
+dnl This library is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with this library.  If not, see
+dnl <http://www.gnu.org/licenses/>.
+dnl
+
+AC_DEFUN([LIBVIRT_LINKER_NO_INDIRECT],[
+    AC_MSG_CHECKING([for how to avoid indirect lib deps])
+
+    NO_INDIRECT_LDFLAGS=
+    `$LD --help 2>&1 | grep -- "--no-copy-dt-needed-entries" >/dev/null` && \
+        NO_INDIRECT_LDFLAGS="-Wl,--no-copy-dt-needed-entries"
+    AC_SUBST([NO_INDIRECT_LDFLAGS])
+
+    AC_MSG_RESULT([$NO_INDIRECT_LDFLAGS])
+])
diff --git a/src/Makefile.am b/src/Makefile.am
index 7c3d8a1..faa2cd6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -35,6 +35,7 @@ AM_CFLAGS =	$(LIBXML_CFLAGS)				\
 AM_LDFLAGS =	$(DRIVER_MODULE_LDFLAGS)			\
 		$(COVERAGE_LDFLAGS)				\
 		$(RELRO_LDFLAGS)				\
+		$(NO_INDIRECT_LDFLAGS)				\
 		$(NULL)
 
 EXTRA_DIST = $(conf_DATA) util/keymaps.csv
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9098dec..86c3e11 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -50,6 +50,7 @@ endif
 
 LDADDS = \
         $(WARN_CFLAGS) \
+	$(NO_INDIRECT_LDFLAGS) \
 	$(PROBES_O) \
 	../src/libvirt.la \
 	../gnulib/lib/libgnu.la
diff --git a/tools/Makefile.am b/tools/Makefile.am
index be7ed23..c5bd5bb 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -24,6 +24,7 @@ INCLUDES = \
 
 AM_LDFLAGS = \
 	$(RELRO_LDFLAGS)					\
+	$(NO_INDIRECT_LDFLAGS)					\
 	$(NULL)
 
 POD2MAN = pod2man -c "Virtualization Support" -r "$(PACKAGE)-$(VERSION)"
-- 
1.8.4.rc3