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diff --git a/CMakeLists.txt b/CMakeLists.txt
index 810d5d1..d6ba3e9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,7 +49,33 @@ message(STATUS "xeus binary version: v${XEUS_BINARY_VERSION}")
find_package(nlohmann_json 3.2.0 REQUIRED)
find_package(xtl 0.4 REQUIRED)
find_package(cppzmq 4.3.0 REQUIRED)
-find_package(cryptopp REQUIRED)
+
+# cryptopp isn't built with cmake, find it manually
+find_path(cryptopp_ROOT_DIR
+ NAMES include/cryptopp/cryptlib.h
+ PATHS ENV cryptopp_ROOT)
+
+find_path(cryptopp_INCLUDE_DIR
+ NAMES cryptopp/cryptlib.h
+ HINTS ${cryptopp_ROOT_DIR}
+ PATH_SUFFIXES include)
+
+find_library(cryptopp_STATIC_LIB
+ NAMES libcryptopp.a
+ HINTS ${cryptopp_ROOT_DIR}
+ PATH_SUFFIXES lib)
+
+if (NOT cryptopp_INCLUDE_DIR OR NOT cryptopp_STATIC_LIB)
+ message(FATAL_ERROR "cannot find cryptopp, missing include dir or static lib")
+else()
+ message("Found cryptopp: ${cryptopp_ROOT_DIR}")
+endif()
+
+add_library(cryptopp-static STATIC IMPORTED)
+set_target_properties(cryptopp-static
+ PROPERTIES
+ IMPORTED_LOCATION ${cryptopp_STATIC_LIB}
+ INTERFACE_INCLUDE_DIRECTORIES ${cryptopp_INCLUDE_DIR})
# On Unix platforms, ZeroMQ is built with autotools and pkg-config is
# required to locate it.
@@ -157,10 +183,11 @@ get_target_property(cryptopp_INCLUDE_DIR cryptopp-static INTERFACE_INCLUDE_DIREC
get_target_property(cryptopp_LIBRARY cryptopp-static LOCATION)
set(CMAKE_REQUIRED_LIBRARIES ${cryptopp_LIBRARY})
set(CMAKE_REQUIRED_INCLUDES ${cryptopp_INCLUDE_DIR})
+set(CMAKE_REQUIRED_FLAGS "--std=c++11")
check_cxx_source_compiles("
#include \"cryptopp/config.h\"
int main(){
- [[maybe_unused]] CryptoPP::byte b = CryptoPP::byte{0x36};
+ CryptoPP::byte b = CryptoPP::byte{0x36};
}" HAVE_CRYPTOPP_BYTE_T)
cmake_pop_check_state()
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