cmake HAVE_MALLINFO2 examples

Lewuathe/mlir-hello thirdparty/llvm-project/llvm/cmake/config-ix.cmake :331

check_symbol_exists(mallinfo2 malloc.h HAVE_MALLINFO2)

microsoft/DirectXShaderCompiler cmake/config-ix.cmake :153

check_symbol_exists(mallinfo2 malloc.h HAVE_MALLINFO2)

root-project/root interpreter/llvm-project/llvm/cmake/config-ix.cmake :295

check_symbol_exists(mallinfo2 malloc.h HAVE_MALLINFO2)

google/filament third_party/dawn/third_party/dxc/cmake/config-ix.cmake :153

check_symbol_exists(mallinfo2 malloc.h HAVE_MALLINFO2)

klee/klee CMakeLists.txt :364

check_cxx_symbol_exists(mallinfo2 malloc.h HAVE_MALLINFO2)