Fixed ncurses.do_configure:
configure: WARNING: did not find library 
/path/to/tmp/sysroots/qemuarm/usr/lib/pkgconfig

And then anyone requires ncurses.pc will fail.

The configure.in checks:
[snip]
if test -n "$PKG_CONFIG_LIBDIR" && test -d "$PKG_CONFIG_LIBDIR" ; then
[snip]

Create PKG_CONFIG_LIBDIR in do_configure will fix the problem.

We can reproduce the problem by:
Set SSTATE_DIR=/path/to/sstate-cache
1) In build1, make sure everything is ready in SSTATE_DIR
$ bitbake ncurses
2) In build2, rebuild ncurses only:
$ bitbake ncurses -ccleansstate && bitbake ncurses

Then we will see the warning in log.do_configure.

Signed-off-by: Robert Yang <liezhi.y...@windriver.com>
---
 meta/recipes-core/ncurses/ncurses.inc |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/recipes-core/ncurses/ncurses.inc 
b/meta/recipes-core/ncurses/ncurses.inc
index 521d0e4..10f7dd1 100644
--- a/meta/recipes-core/ncurses/ncurses.inc
+++ b/meta/recipes-core/ncurses/ncurses.inc
@@ -98,6 +98,8 @@ do_configure() {
         # not the case for /dev/null redirections)
         export cf_cv_working_poll=yes
 
+       # The --enable-pc-files requires PKG_CONFIG_LIBDIR existed
+       mkdir -p ${PKG_CONFIG_LIBDIR}
        ( cd ${S}; gnu-configize --force )
        ncurses_configure "narrowc" || \
                return 1
-- 
1.7.9.5

-- 
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