CMAKE_USE_SYSTEM_CURL is ON but a curl is not found

问题

I was trying to install cmake with the system-curl, with ./bootstrap --system-curl, as seen here. Doing that, I got:

    -- Could NOT find CURL (missing: CURL_LIBRARY CURL_INCLUDE_DIR) 
CMake Error at CMakeLists.txt:413 (message):
  CMAKE_USE_SYSTEM_CURL is ON but a curl is not found!
Call Stack (most recent call first):
  CMakeLists.txt:682 (CMAKE_BUILD_UTILITIES)


-- Configuring incomplete, errors occurred!
See also "/root/temp/cmake-3.14.5/CMakeFiles/CMakeOutput.log".
See also "/root/temp/cmake-3.14.5/CMakeFiles/CMakeError.log".
---------------------------------------------
Error when bootstrapping CMake:
Problem while running initial CMake

回答1:

For me running ./bootstrap --no-system-curl led to errors when running cmake on open-cv, because the https protocol could not be found. So I needed to get ./bootstrap --system-curl running.

The solution is to install curl dev dependencies. These are needed by cmake, not just curl.

I ran:

sudo apt-get install curl
sudo apt-get install libssl-dev libcurl4-openssl-dev

回答2:

Alternatively, you can also just use cmake-provided curl library by running ./bootstrap --no-system-curl instead.

回答3:

For the reference, I solved looking at this issue on Github. In particular, I downloaded the curl source code from https://curl.haxx.se/download.html and compiled curl with:

/CurlExtractFolder$ ./configure --with--ssl
/CurlExtractFolder$ make
/CurlExtractFolder$ sudo make install

来源：https://stackoverflow.com/questions/56941778/cmake-use-system-curl-is-on-but-a-curl-is-not-found