sanity.bbclass: raise_sanity_error if /tmp is noexec

Older meson versions save temporary scripts in /tmp.
Similarly some recipies also do that (e.g. ccan in sbsigntool).

As this can lead to unexpected build failures with no simple way
to workaround, make such setup a fatal error.

(From OE-Core rev: ee93a8e89322143252040bd5bc99259c5efff831)

Signed-off-by: Michal Sieron <michalwsieron@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/classes-global/sanity.bbclass b/meta/classes-global/sanity.bbclass
index 1bd74e1935..bbbc41ddae 100644
--- a/meta/classes-global/sanity.bbclass
+++ b/meta/classes-global/sanity.bbclass
@@ -840,6 +840,10 @@ def check_sanity_everybuild(status, d):
         status.addresult("Please use a umask which allows a+rx and u+rwx\n")
     os.umask(omask)
 
+    # Ensure /tmp is NOT mounted with noexec
+    if os.statvfs("/tmp").f_flag & os.ST_NOEXEC:
+        raise_sanity_error("/tmp shouldn't be mounted with noexec.", d)
+
     if d.getVar('TARGET_ARCH') == "arm":
         # This path is no longer user-readable in modern (very recent) Linux
         try: