core/CMake_checkdeps.cmake

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# Ensures there are no dependencies other than ntdll.
# Caller must set:
# + DUMPBIN_EXECUTABLE
# + lib

# Ensure output goes to std{out,err} (i#951)
set(ENV{VS_UNICODE_OUTPUT} "")

execute_process(COMMAND
  ${DUMPBIN_EXECUTABLE} /dependents ${lib}
  RESULT_VARIABLE deps_result
  ERROR_VARIABLE deps_error
  OUTPUT_VARIABLE deps_out
  )
if (deps_result OR deps_error)
  message(FATAL_ERROR "*** ${DEPS_EXECUTABLE} failed: ***\n${deps_error}")
endif (deps_result OR deps_error)
string(REGEX MATCH "following dependencies:.*Summary" dlls "${deps_out}")
string(REGEX REPLACE "\r?\n" "" dlls "${dlls}")
string(REGEX REPLACE "following dependencies: *" "" dlls "${dlls}")
string(REGEX REPLACE " *Summary" "" dlls "${dlls}")
if (NOT dlls MATCHES "^ntdll.dll$")
  message(FATAL_ERROR "*** Error: ${lib} depends on more than ntdll.dll: ${dlls}")
endif ()