boost: ensure boost to remain an empty metapackage

To ensure that boost remains an empty metapackage after version
updates, we explicitly require boost files to be empty. If new
libraries exist after a version update of the boost recipe,
bitbake will emit a warning at the do_package task. For example,
at the version update from 1.58.0 to 1.59.0, the new timer
library is indicated with:

WARNING: QA Issue: boost: Files/directories were installed but not shipped in any package:
  /usr/lib/libboost_timer.so.1.59.0
Please set FILES such that these items are packaged. Alternatively if they are unneeded, avoid installing them or delete them within do_install.
boost: 1 installed and not shipped files. [installed-vs-shipped]

Ross Burton suggested this improvement on the openembedded-core
mailing list during review of the boost recipe version update [1].

[1] http://lists.openembedded.org/pipermail/openembedded-core/2015-December/114314.html

(From OE-Core master rev: c4e33232db2da3594cc4ba38eea56ee1acb54d3a)

(From OE-Core rev: 90dcc9838e5be74f5ec7a8380cf6da3bddb1c955)

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@oss.bmw-carit.de>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-support/boost/boost.inc b/meta/recipes-support/boost/boost.inc
index 3288e845f9..bb49d60100 100644
--- a/meta/recipes-support/boost/boost.inc
+++ b/meta/recipes-support/boost/boost.inc
@@ -59,6 +59,7 @@ FILES_boost-test = "${libdir}/libboost_prg_exec_monitor*.so.* \
 
 # -dev last to pick up the remaining stuff
 PACKAGES += "${PN}-dev ${PN}-staticdev"
+FILES_${PN} = ""
 FILES_${PN}-dev = "${includedir} ${libdir}/libboost_*.so"
 FILES_${PN}-staticdev = "${libdir}/libboost_*.a"