cmake: make the traceparser permissive by default (fixes #7501)

mesonbuild/cmake/traceparser.py

@@ -74,7 +74,7 @@ class CMakeGeneratorTarget(CMakeTarget):
         self.working_dir = None  # type: T.Optional[str]
 
 class CMakeTraceParser:
-    def __init__(self, cmake_version: str, build_dir: str, permissive: bool = False):
+    def __init__(self, cmake_version: str, build_dir: str, permissive: bool = True):
         self.vars = {}     # type: T.Dict[str, T.List[str]]
         self.targets = {}  # type: T.Dict[str, CMakeTarget]
 

test cases/linuxlike/13 cmake dependency/cmake/FindSomethingLikeZLIB.cmake

@@ -4,6 +4,9 @@ include(CMakeFindDependencyMacro)
 include(CheckCXXSourceRuns)
 include(CheckCSourceRuns)
 
+# Do something stupid (see https://github.com/mesonbuild/meson/issues/7501)
+set("")
+
 check_cxx_source_runs(
 "
 #include <iostream>