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Diffstat (limited to 'docs/checks/README-non-pod-global-static.md')
| -rw-r--r-- | docs/checks/README-non-pod-global-static.md | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/checks/README-non-pod-global-static.md b/docs/checks/README-non-pod-global-static.md new file mode 100644 index 00000000..3dda3d79 --- /dev/null +++ b/docs/checks/README-non-pod-global-static.md @@ -0,0 +1,15 @@ +# non-pod-global-static + +Warns about non-POD [1] global statics. +CTORS from globals are run before main, on library load, slowing down startup. +This is more a problem for libraries, since usually the app won't use every feature the library provides, +so it's a waste of resources to initialize CTORs from unused features. + +It's tolerated to have global statics in executables, however, clazy doesn't know if it's compiling +an executable or a library, so it's your job to run this check only on libraries. It doesn't harm, though, +to also remove global statics from executables, because they're usually evil. + +The same goes for DTORs at library unload time. A good way to fix them is by using `Q_GLOBAL_STATIC`. + + +[1] The term "POD" is too strict. The correct term is "types with a trivial dtor and trivial ctor", and that's how this check is implemented. |