kumquat-buildroot/package/bluez5_utils/0001-Link-mcaptest-with-lrt-when-needed.patch

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From 54b8977c2f854d04f9c6383e2cac76ea4cde3eaa Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Date: Mon, 29 Dec 2014 12:23:41 +0100
Subject: [PATCH] Link mcaptest with -lrt when needed
The mcaptest tool uses the profiles/health/mcap.c source file, which
calls clock_getres(). This function is defined in librt in some C
libraries, so mcaptest should be linked against librt when needed,
otherwise one gets link failures such as:
ld: profiles/health/mcap.o: undefined reference to symbol 'clock_getres@@GLIBC_2.2.5'
ld: note: 'clock_getres@@GLIBC_2.2.5' is defined in DSO [...]/sysroot/lib64/librt.so.1 so try adding it to the linker command line
[...]/sysroot/lib64/librt.so.1: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
Makefile:4184: recipe for target 'tools/mcaptest' failed
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
Makefile.tools | 2 +-
configure.ac | 5 +++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/Makefile.tools b/Makefile.tools
index bc827fe..fef3db5 100644
--- a/Makefile.tools
+++ b/Makefile.tools
@@ -195,7 +195,7 @@ tools_mcaptest_SOURCES = tools/mcaptest.c \
btio/btio.h btio/btio.c \
src/log.c src/log.h \
profiles/health/mcap.h profiles/health/mcap.c
-tools_mcaptest_LDADD = lib/libbluetooth-internal.la @GLIB_LIBS@
+tools_mcaptest_LDADD = lib/libbluetooth-internal.la @GLIB_LIBS@ @RT_LIBS@
dist_man_MANS += tools/hciattach.1 tools/hciconfig.1 \
tools/hcitool.1 tools/hcidump.1 \
diff --git a/configure.ac b/configure.ac
index 4739c10..b0afba6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,6 +54,11 @@ AC_CHECK_LIB(pthread, pthread_create, dummy=yes,
AC_CHECK_LIB(dl, dlopen, dummy=yes,
AC_MSG_ERROR(dynamic linking loader is required))
+AC_SEARCH_LIBS([clock_getres], [rt],
+ [test "$ac_cv_search_clock_getres" = "none required" ||
+ RT_LIBS=$ac_cv_search_clock_getres])
+AC_SUBST([RT_LIBS])
+
PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.28, dummy=yes,
AC_MSG_ERROR(GLib >= 2.28 is required))
AC_SUBST(GLIB_CFLAGS)
--
2.1.0