If there is an existing build directory when do enter do_compile() then delete
it, as it contains the previous build.  If the rebuild was caused because
dependencies have changed we want to ensure that a rebuild actually happens.

Signed-off-by: Ross Burton <[email protected]>
---
 meta/recipes-support/boost/boost.inc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meta/recipes-support/boost/boost.inc 
b/meta/recipes-support/boost/boost.inc
index 982446c..92c7bcb 100644
--- a/meta/recipes-support/boost/boost.inc
+++ b/meta/recipes-support/boost/boost.inc
@@ -169,6 +169,7 @@ addtask do_boostconfig after do_patch before do_configure
 
 do_compile() {
        set -ex
+       rm -rf ${S}/${TARGET_SYS}
        bjam ${BJAM_OPTS} --prefix=${prefix} \
                --exec-prefix=${exec_prefix} \
                --libdir=${libdir} \
-- 
2.8.0.rc3

-- 
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