Test failed on QNX 7, even though alloca is available. On QNX7,
it's a macro that expands to a line with NULL, but without define
for it.
alloca.cpp:44:5: error: 'NULL' was not declared in this scope
Task-number: QTBUG-59700
Change-Id: I3631d139990020a3adbab8b72e49929b6e721e80
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Alloca() is not supported on all platforms, like
INTEGRITY on ARM, so adding a configure check for it.
This can be used when building QtQml and 3rd party
code, in particular PCRE2 and SQLite.
Change-Id: I9785e16c21f67d1a68fef567e18c3356170f027e
Reviewed-by: Lars Knoll <lars.knoll@qt.io>