Findopenssl.cmake 找不到 OpenSSL，编译 restbed，C++答案

【问题标题】：Findopenssl.cmake fails to find OpenSSL, compiling restbed, C++Findopenssl.cmake 找不到 OpenSSL，编译 restbed，C++
【发布时间】：2019-02-11 03:50:03
【问题描述】：

我正在尝试在 Debian 9.7 上使用 cmake 3.7.2 来编译 restbed，这是一个用于 Web 服务的 C++ 框架。

我按照自述文件的说明进行操作。他们是直截了当的。

git clone --recursive https://github.com/corvusoft/restbed.git
mkdir restbed/build
cd restbed/build
cmake [-DBUILD_SSL=NO] ..
make install
make test

但是运行cmake时出现以下错误：

-- Found ASIO include at: /home/ben/Workspaces/C_Experiments/restbed/dependency/asio/asio/include
-- Found Catch include at: /home/ben/Workspaces/C_Experiments/restbed/dependency/catch/single_include
CMake Error at cmake/Findopenssl.cmake:23 (message):
  Failed to locate OpenSSL dependency.  see restbed/dependency/openssl;
  ./config shared; make all
Call Stack (most recent call first):
  CMakeLists.txt:47 (find_package)

所以我检查了 Findopenssl.cmake，发现它正在许多地方寻找库。

find_library( ssl_LIBRARY_STATIC libssl.a  ssleay32.lib HINTS "${PROJECT_SOURCE_DIR}/dependency/openssl/out32dll" "${PROJECT_SOURCE_DIR}/dependency/openssl" "/usr/local/opt/openssl/lib" "/usr/lib" "/usr/local/lib" "/opt/local/lib" )
find_library( crypto_LIBRARY_STATIC libcrypto.a libeay32.lib HINTS "${PROJECT_SOURCE_DIR}/dependency/openssl/out32dll" "${PROJECT_SOURCE_DIR}/dependency/openssl" "/usr/local/opt/openssl/lib" "/usr/lib" "/usr/local/lib" "/opt/local/lib" )

find_library( ssl_LIBRARY_SHARED libssl.so libssl.dylib ssleay32.dll HINTS "${PROJECT_SOURCE_DIR}/dependency/openssl/out32dll" "${PROJECT_SOURCE_DIR}/dependency/openssl" "/usr/local/opt/openssl/lib" "/usr/lib" "/usr/local/lib" "/opt/local/lib" )
find_library( crypto_LIBRARY_SHARED libcrypto.so libcrypto.dylib libeay32.dll HINTS "${PROJECT_SOURCE_DIR}/dependency/openssl/out32dll" "${PROJECT_SOURCE_DIR}/dependency/openssl" "/usr/local/opt/openssl/lib" "/usr/lib" "/usr/local/lib" "/opt/local/lib" )

find_path( ssl_INCLUDE openssl/ssl.h HINTS "${PROJECT_SOURCE_DIR}/dependency/openssl/inc32" "${PROJECT_SOURCE_DIR}/dependency/openssl/include" "/usr/local/opt/openssl/include" "/usr/include" "/usr/local/include" "/opt/local/include" )

if ( ssl_LIBRARY_STATIC AND ssl_LIBRARY_SHARED AND crypto_LIBRARY_STATIC AND crypto_LIBRARY_SHARED )
    set( OPENSSL_FOUND TRUE )
    add_definitions( -DBUILD_SSL=TRUE )

    if ( APPLE AND BUILD_SSL )
        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated-declarations" )
    endif( )

    message( STATUS "Found OpenSSL include at: ${ssl_INCLUDE}" )
    message( STATUS "Found OpenSSL library at: ${ssl_LIBRARY_STATIC}" )
    message( STATUS "Found OpenSSL library at: ${ssl_LIBRARY_SHARED}" )
    message( STATUS "Found Crypto library at: ${crypto_LIBRARY_STATIC}" )
    message( STATUS "Found Crypto library at: ${crypto_LIBRARY_SHARED}" )
else ( )
    message( FATAL_ERROR "Failed to locate OpenSSL dependency. see restbed/dependency/openssl; ./config shared; make all" )
endif ( )

我也找不到这些文件。我已经安装了 openssl，版本 1.1.0

我在这里遗漏了什么明显的东西？

谢谢

【问题讨论】：

openssl 库文件和头文件在您的系统上的什么位置？也就是说，你是安装包libssl-dev，还是只安装openssl？没有的话需要安装libssl-dev。
谢谢，布雷迪·迪恩。我只有 openssl，并且正在寻找类似 oppenssl-toolkit 的东西。 libssl-dev 是我需要的。

标签： c++ cmake restbed

【解决方案1】：

尝试使用不带括号的cmake 命令：

cmake -DBUILD_SSL=NO ..

【讨论】：

【解决方案2】：

Brady Dean 是正确的，我只安装了 openssl，而不是 libssl-dev。

【讨论】：