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-rw-r--r--CMakeLists.txt13
1 files changed, 11 insertions, 2 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e6dbb73f1..26d4980fc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,7 @@
# To check:
# (From Daniel Stenberg) The cmake build selected to run gcc with -fPIC on my box while the plain configure script did not.
# (From Daniel Stenberg) The gcc command line use neither -g nor any -O options. As a developer, I also treasure our configure scripts's --enable-debug option that sets a long range of "picky" compiler options.
-cmake_minimum_required(VERSION 3.4 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake;${CMAKE_MODULE_PATH}")
include(Utilities)
include(Macros)
@@ -352,7 +352,16 @@ if(CMAKE_USE_OPENSSL)
set(USE_OPENSSL ON)
set(HAVE_LIBCRYPTO ON)
set(HAVE_LIBSSL ON)
- list(APPEND CURL_LIBS OpenSSL::SSL OpenSSL::Crypto)
+
+ # Depend on OpenSSL via imported targets if supported by the running
+ # version of CMake. This allows our dependents to get our dependencies
+ # transitively.
+ if(NOT CMAKE_VERSION VERSION_LESS 3.4)
+ list(APPEND CURL_LIBS OpenSSL::SSL OpenSSL::Crypto)
+ else()
+ list(APPEND CURL_LIBS ${OPENSSL_LIBRARIES})
+ include_directories(${OPENSSL_INCLUDE_DIR})
+ endif()
set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
check_include_file("openssl/crypto.h" HAVE_OPENSSL_CRYPTO_H)