apr: avoid absolute paths for grep

The apr provides usr/share/build-1/libtool which is required by
the recipe such as apache2, and it will find grep on the host
and set absolute paths in libtool: GREP="/usr/bin/grep"

If we build apr/apr-native on a host that grep is in "/usr/bin/grep",
and re-use the sstate on another host with "/bin/grep", it will fail
when build apache2/apache2-native with:

| tmp/sysroots/x86_64-linux/usr/share/build-1/libtool: line 1093: /usr/bin/grep: No such file or directory
| tmp/sysroots/intel-x86-64/usr/share/build-1/libtool: line 1093: /usr/bin/grep: No such file or directory

(From OE-Core rev: 475709fc4f32e1ed01f45ee44819cd24e739eb43)

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/meta/recipes-support/apr/apr_1.5.1.bb b/meta/recipes-support/apr/apr_1.5.1.bb
index 49a08b0261..a27b2338d1 100644
--- a/meta/recipes-support/apr/apr_1.5.1.bb
+++ b/meta/recipes-support/apr/apr_1.5.1.bb
@@ -32,6 +32,11 @@ CACHED_CONFIGUREVARS += "apr_cv_mutex_recursive=yes"
 CACHED_CONFIGUREVARS += "ac_cv_header_netinet_sctp_h=no ac_cv_header_netinet_sctp_uio_h=no"
 
 do_configure_prepend() {
+        # Avoid absolute paths for grep since it causes failures
+        # when using sstate between different hosts with different
+        # install paths for grep.
+        export GREP="grep"
+
         cd ${S}
         ./buildconf
 }