When compiled with `LLVM_ENABLE_RPMALLOC`, `lli.exe` links statically to
the runtime. With `LLVM_EXPORT_SYMBOLS_FOR_PLUGINS` enabled, `lli.exe`
exports a subset of symbols from the runtime library, but not all. In
particular, `printf()` is exported from the application binary, but
`fflush()` and `exit()` are not. For a JITted module, unresolved
external symbols are loaded either from the application or dynamic
libraries, in this case, from `msvcrt.dll`. The `MCJIT/frem.ll` test
attempts to flush the output, but because the functions resolve to
different CRT instances, the output data is lost.
The patch avoids the test failure by disabling exporting symbols from
`lli.exe` when it is linked with the static runtime library.
Igor Kudrin
1b4d46370a