ncurses: remove config.cache

Instead of having a config.cache that overrides the system site files,
simply set the values in CACHED_CONFIGUREVARS. We can also drop the
mkstemp check as the configure.ac assumes it works, leaving just
nanosleep.

(From OE-Core rev: c30c90e3adfa91407c37838c971e251f8482e2b8)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/ncurses/files/config.cache

@@ -1,4 +0,0 @@
-#! /bin/sh
-
-cf_cv_func_nanosleep=yes
-cf_cv_func_mkstemp=yes

meta/recipes-core/ncurses/ncurses.inc

@@ -16,7 +16,8 @@ inherit autotools binconfig-disabled multilib_header pkgconfig
 SRC_URI = "git://salsa.debian.org/debian/ncurses.git;protocol=https"
 
 EXTRA_AUTORECONF = "-I m4"
-CONFIG_SITE =+ "${WORKDIR}/config.cache"
+
+CACHED_CONFIGUREVARS = "cf_cv_func_nanosleep=yes"
 
 EXTRASITECONFIG = "CFLAGS='${CFLAGS} -I${SYSROOT_DESTDIR}${includedir}'"
 

meta/recipes-core/ncurses/ncurses_6.2.bb

@@ -2,12 +2,11 @@ require ncurses.inc
 
 SRC_URI += "file://0001-tic-hang.patch \
            file://0002-configure-reproducible.patch \
-           file://config.cache \
            "
 # commit id corresponds to the revision in package version
 SRCREV = "a669013cd5e9d6434e5301348ea51baf306c93c4"
 S = "${WORKDIR}/git"
-EXTRA_OECONF += "--with-abi-version=5 --cache-file=${B}/config.cache"
+EXTRA_OECONF += "--with-abi-version=5"
 UPSTREAM_CHECK_GITTAGREGEX = "(?P<pver>\d+(\.\d+)+(\+\d+)*)"
 
 # This is needed when using patchlevel versions like 6.1+20181013