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__ftol2 is exported from msvcrt on NT6+, not from ntdll for some reason. So native apps still need to statically link _ftol2 and _ftoul2_legacy, but apps linking to msvcrt only need to statically link _ftoul2_legacy (via msvcrtex), when on NT6+.
Big chunks of this CRT library are taken from Wine's msvcrt implementation, you can find a list of synced files in README.WINE file. Notes: 1. When syncing, omit MSVCRT_ prefix where possible, Wine has to keep this because they are linking with *both* original crt, and ms crt implementation. ReactOS has the only CRT, so no need to make distinct functions. 2. ReactOS compiles two versions of the CRT library, one for usermode (called just "crt"), and one version for kernelmode usage (called "libcntpr"). In order to separate the code, you can use #ifdef _LIBCNT_ for libcntpr code.