CODEWITHSUNDEEP
c++cmakecrypto++
user13134124
user13134124

Reputation:

CMake Cant find CryptoPP with find_package

I've installed C++ library "Crypto++" using sudo apt install libcrypto++-dev

I find lib using this command: find_package(CryptoPP REQUIRED)

But CMake cant find it for some reason, and print this error:

CMake Error at CMakeLists.txt:40 (find_package):
  By not providing "FindCryptoPP.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "CryptoPP",
  but CMake did not find one.

  Could not find a package configuration file provided by "CryptoPP" with any
  of the following names:

    CryptoPPConfig.cmake
    cryptopp-config.cmake

  Add the installation prefix of "CryptoPP" to CMAKE_PREFIX_PATH or set
  "CryptoPP_DIR" to a directory containing one of the above files.  If
  "CryptoPP" provides a separate development package or SDK, be sure it has
  been installed.

I also tried all names like CryptoPP, and etc. It didnt work.

Upvotes: 1

Views: 2120

Answers (2)

Botje
Botje

Reputation: 30807

Three seconds of googling shows that the CryptoPP folks decided to stop supporting CMake themselves.

The community-supported CMake build stuff is now here. As the build instructions go, fetch it and then you can link your target(s) to cryptopp.

Alternatively, you can try your luck with the pkgconfig file that seems to ship with that package:

find_package(PkgConfig REQUIRED)
pkg_check_modules(Cryptopp REQUIRED IMPORTED_TARGET libcrypto++)
target_link_libraries(your_application PUBLIC PkgConfig::Cryptopp)

If you use macOS' homebrew package manager, the package is named libcryptopp instead, so the pkg_check_modules line needs to change accordingly.

Upvotes: 4

Alvov1
Alvov1

Reputation: 307

For those who are having trouble using the first answer. A possible solution for CMake, which works both on Linux (sudo apt-get install libcrypto++-dev libcrypto++-doc libcrypto++-utils), and on MacOS (brew install cryptopp):

find_path(CRYPTOPP_INCLUDE cryptopp/cryptlib.h /usr/include /usr/local/include /opt/homebrew/include)
find_library(CRYPTOPP_LIB cryptopp /usr/lib /usr/local/lib /opt/homebrew/lib)
if(NOT CRYPTOPP_INCLUDE OR NOT CRYPTOPP_LIB)
    message(FATAL_ERROR "Crypto++ library is not found!")
endif()

add_executable(Target ...)

target_link_libraries(Target PRIVATE ${CRYPTOPP_LIB})
target_include_directories(Target PRIVATE ${CRYPTOPP_INCLUDE})

Upvotes: 0

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