Target file name must not contain a path separator as that breaks things.

2 files changed, 10 insertions, 1 deletions

diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 8163bca..2426417 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -270,6 +270,8 @@ class EnvironmentVariables:
 
 class Target:
     def __init__(self, name, subdir, build_by_default):
+        if '/' in name or '\\' in name:
+            raise InvalidArguments('Target name must not contain a path separator.')
         self.name = name
         self.subdir = subdir
         self.build_by_default = build_by_default
diff --git a/mesonbuild/interpreter.py b/mesonbuild/interpreter.py
index 948a6d4..63725ab 100644
--- a/mesonbuild/interpreter.py
+++ b/mesonbuild/interpreter.py
@@ -2593,7 +2593,14 @@ different subdirectory.
         else:
             mlog.debug('Unknown target type:', str(targetholder))
             raise RuntimeError('Unreachable code')
-        target = targetclass(name, self.subdir, self.subproject, is_cross, sources, objs, self.environment, kwargs)
+        # Fix failing test 53 when removing this.
+        if '/' in name or '\\' in name:
+            mlog.warning('Target name must not contain a path separator. This will become a hard error in a future release.')
+            subpart, name = os.path.split(name)
+            subdir = os.path.join(self.subdir, subpart)
+        else:
+            subdir = self.subdir
+        target = targetclass(name, subdir, self.subproject, is_cross, sources, objs, self.environment, kwargs)
         if is_cross:
             self.add_cross_stdlib_info(target)
         l = targetholder(target, self)