From a6fb54e2eef4e393bd06829bc3bdc746ea9d41a6 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Mon, 4 Oct 2010 20:01:07 +0100
Subject: Populate the pkg-config Libs.private field

---
 configure.ac     | 17 ++++++++++++-----
 libusb-1.0.pc.in |  1 +
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index 38e9ce7..1d74b72 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,6 +35,7 @@ AC_DEFINE([_GNU_SOURCE], [], [Use GNU extensions])
 AM_MAINTAINER_MODE
 
 AC_MSG_CHECKING([operating system])
+PC_LIBS_PRIVATE=
 case $host in
 *-linux*)
 	AC_DEFINE(OS_LINUX, [], [Linux backend])
@@ -42,9 +43,11 @@ case $host in
 	AC_DEFINE([THREADS_POSIX], [], [Use Posix Threads])
 	AC_MSG_RESULT([Linux])
 	backend="linux"
-	AC_CHECK_LIB(rt, clock_gettime)
+	AC_CHECK_LIB(rt, clock_gettime, PC_LIBS_PRIVATE="-lrt")
+	LIBS="${LIBS} ${PC_LIBS_PRIVATE}"
 	threads="posix"
 	THREAD_CFLAGS="-pthread"
+	PC_LIBS_PRIVATE="${PC_LIBS_PRIVATE} -pthread"
 	AM_LDFLAGS=""
 	;;
 *-darwin*)
@@ -56,15 +59,17 @@ case $host in
 	backend="darwin"
 	threads="posix"
 	THREAD_CFLAGS="-pthread"
-	AM_LDFLAGS="-Wl,-framework -Wl,IOKit -Wl,-framework -Wl,CoreFoundation -Wl,-prebind -no-undefined"
-	;;
+	PC_LIBS_PRIVATE="-Wl,-framework,IOKit -Wl,-framework,CoreFoundation -Wl,-prebind -no-undefined -pthread"
+	AM_LDFLAGS=${PC_LIBS_PRIVATE}
+;;
 *-mingw*)
 	AC_DEFINE(OS_WINDOWS, [], [Windows backend])
 	AC_SUBST(OS_WINDOWS)
 	AC_MSG_RESULT([Windows])
 	backend="windows"
 	threads="windows"
-	LIBS="-lsetupapi -lole32 -ladvapi32"
+	PC_LIBS_PRIVATE="-lsetupapi -lole32 -ladvapi32"
+	LIBS="${LIBS} ${PC_LIBS_PRIVATE}"
 	# -avoid-version to avoid a naming scheme such as libusb-0.dll
 	AM_LDFLAGS="-no-undefined -avoid-version --add-stdcall-alias"
 	AC_CHECK_TOOL(RC, windres, no)
@@ -76,13 +81,15 @@ case $host in
 	AC_MSG_RESULT([Windows])
 	backend="windows"
 	threads="posix"
-	LIBS="-lsetupapi -lole32 -ladvapi32"
+	PC_LIBS_PRIVATE="-lsetupapi -lole32 -ladvapi32"
+	LIBS="${LIBS} ${PC_LIBS_PRIVATE}"
 	AM_LDFLAGS="-no-undefined -avoid-version"
 	AC_CHECK_TOOL(RC, windres, no)
 	;;
 *)
 	AC_MSG_ERROR([unsupported operating system])
 esac
+AC_SUBST(PC_LIBS_PRIVATE)
 
 AM_CONDITIONAL([OS_LINUX], [test "x$backend" = "xlinux"])
 AM_CONDITIONAL([OS_DARWIN], [test "x$backend" = "xdarwin"])
diff --git a/libusb-1.0.pc.in b/libusb-1.0.pc.in
index dd6bde0..0abb16b 100644
--- a/libusb-1.0.pc.in
+++ b/libusb-1.0.pc.in
@@ -7,5 +7,6 @@ Name: libusb-1.0
 Description: C API for USB device access from Linux userspace
 Version: @VERSION@
 Libs: -L${libdir} -lusb-1.0
+Libs.private: @PC_LIBS_PRIVATE@
 Cflags: -I${includedir}/libusb-1.0
 
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