Yu Watanabe
01e02cb94f
When compiler optimization or LTO (Link Time Optimization) is enabled, dlopen helper functions (such as dlopen_libfoo()) can be aggressively inlined into their callers or cloned for specific call sites. While this is beneficial for production builds, it alters or completely removes the original function symbols from the final executable. Consequently, this breaks the test (to be added in this series) that checks whether the dlopen_libfoo() function corresponding to a dlopen ELF note is actually called. To resolve this, introduce the `_dlopen_loader_` macro. Under developer builds, it applies the `_noclone_` and `_noinline_` attributes to guarantee that helper symbols remain intact and discoverable by the test suite. In production builds, the macro evaluates to nothing, allowing full compiler optimization to proceed unimpeded.
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