meson: improve SDK's wrapper to make Wraps work

Meson, as provided by the SDK, would fail to fetch Wraps' sources on bare
systems (i.e. systems, that only provide little more than the SDK).

This change modifies the wrapper script so that it sets an environment
variable (unless it is already set) that is used to determine valid
certificates for secured connections.

It does not affect bitbake's interaction with meson.

The SDK's SSL directory was not searched, so meson would fail when it tried
to fetch sources via https, that were specified in wrap files.
Specifically `urllib` would fail:
```
<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1129)>
```

Caution: this patch depends on the underlying C library (i.e. openssl)
to consider this environment variable.

(From OE-Core rev: afad2f09ebbfe395f8fafce8218e26056479fe39)

Signed-off-by: Leif Middelschulte <Leif.Middelschulte@klsmartin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/recipes-devtools/meson/meson/meson-wrapper b/meta/recipes-devtools/meson/meson/meson-wrapper
index d4b5187f8d..8fafaad975 100755
--- a/meta/recipes-devtools/meson/meson/meson-wrapper
+++ b/meta/recipes-devtools/meson/meson/meson-wrapper
@@ -4,6 +4,10 @@ if [ -z "$OECORE_NATIVE_SYSROOT" ]; then
     echo "OECORE_NATIVE_SYSROOT not set; are you in a Yocto SDK environment?" >&2
 fi
 
+if [ -z "$SSL_CERT_DIR" ]; then
+    export SSL_CERT_DIR="${OECORE_NATIVE_SYSROOT}/etc/ssl/certs/"
+fi
+
 # If these are set to a cross-compile path, meson will get confused and try to
 # use them as native tools. Unset them to prevent this, as all the cross-compile
 # config is already in meson.cross.