c++ - CMake在Brew上找不到OpenSSL

Question

CMake无法为我找到OpenSSL。 Brew的OpenSSL位于/usr/local/Cellar/openssl/1.0.2s/。我在macOS Catalina上。
我的CMakeLists.txt看起来像这样:

[...]

set(OPENSSL_ROOT_DIR /usr/local/Cellar/openssl/1.0.2s)

find_package(OpenSSL REQUIRED)
target_include_directories(myapp PUBLIC ${OPENSSL_INCLUDE_DIR})
message(STATUS "OpenSSL: Version ${OPENSSL_VERSION}")
message(STATUS "OpenSSL: include dir at ${OPENSSL_INCLUDE_DIR}")
message(STATUS "OpenSSL: libraries at ${OPENSSL_LIBRARIES} ${OPENSSL_SSL_LIBRARIES}")

[...]

target_link_libraries(myapp
        ${CMAKE_DL_LIBS}
        ${OPENSSL_LIBRARIES}
        ${OPENSSL_SSL_LIBRARIES}
        Qt5::Core
        )

输出:

-- OpenSSL: Version 1.0.2s
-- OpenSSL: include dir at /usr/local/Cellar/openssl/1.0.2s/include
-- OpenSSL: libraries at /usr/lib/libssl.dylib;/usr/lib/libcrypto.dylib /usr/lib/libssl.dylib

因此，CMake找到了正确的包含目录，但是这些库是从我系统的OpenSSL安装中获取的？即使我根据 documentation指定了 OPENSSL_ROOT_DIR。
为什么找不到这些文件？

/usr/local/Cellar/openssl/1.0.2s/lib/libcrypto.a
/usr/local/Cellar/openssl/1.0.2s/lib/pkgconfig/libssl.pc
/usr/local/Cellar/openssl/1.0.2s/lib/pkgconfig/libcrypto.pc
/usr/local/Cellar/openssl/1.0.2s/lib/libssl.dylib
/usr/local/Cellar/openssl/1.0.2s/lib/libcrypto.1.0.0.dylib
/usr/local/Cellar/openssl/1.0.2s/lib/libcrypto.dylib
/usr/local/Cellar/openssl/1.0.2s/lib/libssl.1.0.0.dylib
/usr/local/Cellar/openssl/1.0.2s/lib/libssl.a

如果我忽略了这一点，然后继续编译程序，则会得到:

ld: cannot link directly with /usr/lib/libcrypto.dylib for architecture x86_64

我尝试了 brew upgrade openssl的值(value)。
我从CLion运行CMake，并包含 -DCMAKE_BUILD_TYPE=Debug -DCMAKE_PREFIX_PATH=/Users/me/Qt/5.9.7/clang_64

Answer 1

CMake缓存是问题。在CLion中，我可以通过转到Tools -> CMake -> Reset cache & reload project正确地重建/刷新CMake。之后，输出为:

-- OpenSSL: Version 1.0.2s
-- OpenSSL: include dir at /usr/local/Cellar/openssl/1.0.2s/include
-- OpenSSL: libraries at /usr/local/Cellar/openssl/1.0.2s/lib/libssl.dylib;/usr/local/Cellar/openssl/1.0.2s/lib/libcrypto.dylib /usr/local/Cellar/openssl/1.0.2s/lib/libssl.dylib

这似乎是正确的，并回答了我的问题。
另外，我必须做: brew switch openssl 1.0.2s才能正确编译。