environment: Add needs_exe_wrapper for overriding auto-detection.

This is useful when build_machine appears to be compatible with
host_machine, but actually isn't. For example when:
- build_machine is macOS and host_machine is the iOS Simulator
- the build_machine's libc is glibc but the host_machine libc is uClibc
- code relies on kernel features not available on the build_machine

1 files changed, 3 insertions, 0 deletions

diff --git a/mesonbuild/environment.py b/mesonbuild/environment.py
index bf58472..d07bb1d 100644
--- a/mesonbuild/environment.py
+++ b/mesonbuild/environment.py
@@ -906,6 +906,9 @@ class CrossBuildInfo:
         return 'host_machine' in self.config
 
     def need_exe_wrapper(self):
+        value = self.config['properties'].get('needs_exe_wrapper', None)
+        if value is not None:
+            return value
         # Can almost always run 32-bit binaries on 64-bit natively if the host
         # and build systems are the same. We don't pass any compilers to
         # detect_cpu_family() here because we always want to know the OS