I have built Curl from source and it’s installed in /usr/local/lib/libcurl.so

I am now trying to instruct CMake to statically link this version with my application (if dynamic is easier, that’s fine).

From other Stackoverflow questions I tried this:

option(CURL_STATICLIB "Set to ON to build libcurl with static linking."  ON)
option(LIBCURL_ENABLE "Enable or disable the requirement of libcurl" ON)

set(CURL_LIBRARY "-lcurl") 
set(CURL_PATH "/usr/local/lib")

find_library(LIB_CURL NAMES libcurl PATHS ${CURL_PATH})

include_directories(${CURL_INCLUDE_DIR})
message(STATUS "LIB_CURL: " ${LIB_CURL})

add_definitions(-DCURL_STATICLIB)
target_link_libraries(my_project PRIVATE ${OPENSSL_LIBRARIES} ${CURL_LIBRARIES})

but it cannot find libcurl.so:

LIB_CURL: LIB_CURL-NOTFOUND

(My CMake knowledge is basic, any additional tips to improve the above are welcome)

>Solution :

option(CURL_STATICLIB "Set to ON to build libcurl with static linking."  ON)
option(LIBCURL_ENABLE "Enable or disable the requirement of libcurl" ON)

option is used wrongly. curl is not configured in that CMakeLists, therefore option should be removed.

Try

find_library(LIB_CURL NAMES curl PATHS ${CURL_PATH})

It’s unclear, you define -DCURL_STATICLIB but look for libcurl.so