1 files changed, 70 insertions, 24 deletions

diff --git a/project/cmake/modules/FindCurl.cmake b/project/cmake/modules/FindCurl.cmake
index a2e8862..ed4d81f 100644
--- a/project/cmake/modules/FindCurl.cmake
+++ b/project/cmake/modules/FindCurl.cmake
@@ -1,37 +1,83 @@
-# - Try to find CURL
-# Once done this will define
+#.rst:
+# FindCurl
+# --------
+# Finds the Curl library
 #
-# CURL_FOUND - system has libcurl
-# CURL_INCLUDE_DIRS - the libcurl include directory
-# CURL_LIBRARIES - The libcurl libraries
+# This will will define the following variables::
+#
+# CURL_FOUND - system has Curl
+# CURL_INCLUDE_DIRS - the Curl include directory
+# CURL_LIBRARIES - the Curl libraries
+# CURL_DEFINITIONS - the Curl definitions
+#
+# and the following imported targets::
+#
+#   Curl::Curl   - The Curl library
 
 if(PKG_CONFIG_FOUND)
-  pkg_check_modules (CURL libcurl)
-  list(APPEND CURL_INCLUDE_DIRS ${CURL_INCLUDEDIR})
-else()
-  find_path(CURL_INCLUDE_DIRS curl/curl.h)
-  find_library(CURL_LIBRARIES NAMES curl libcurl)
+  pkg_check_modules(PC_CURL libcurl QUIET)
 endif()
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(Curl DEFAULT_MSG CURL_INCLUDE_DIRS CURL_LIBRARIES)
 
-mark_as_advanced(CURL_INCLUDE_DIRS CURL_LIBRARIES)
+find_path(CURL_INCLUDE_DIR NAMES curl/curl.h
+                           PATHS ${PC_CURL_INCLUDEDIR})
+find_library(CURL_LIBRARY NAMES curl libcurl
+                          PATHS ${PC_CURL_LIBDIR})
+
+set(CURL_VERSION ${PC_CURL_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Curl
+                                  REQUIRED_VARS CURL_LIBRARY CURL_INCLUDE_DIR
+                                  VERSION_VAR CURL_VERSION)
 
 if(CURL_FOUND)
-  if(NOT CURL_LIBRARY_DIRS AND CURL_LIBDIR)
-    set(CURL_LIBRARY_DIRS ${CURL_LIBDIR})
+  set(CURL_INCLUDE_DIRS ${CURL_INCLUDE_DIR})
+  set(CURL_LIBRARIES ${CURL_LIBRARY})
+
+  # Check whether OpenSSL inside libcurl is static.
+  if(UNIX)
+    if(NOT DEFINED HAS_CURL_STATIC)
+      get_filename_component(CURL_LIBRARY_DIR ${CURL_LIBRARY} DIRECTORY)
+      find_soname(CURL REQUIRED)
+
+      if(APPLE)
+        set(libchecker nm)
+        set(searchpattern "T [_]?CRYPTO_set_locking_call")
+      else()
+        set(libchecker readelf -s)
+        set(searchpattern "CRYPTO_set_locking_call")
+      endif()
+      execute_process(
+        COMMAND ${libchecker} ${CURL_LIBRARY_DIR}/${CURL_SONAME}
+        COMMAND grep -Eq ${searchpattern}
+        RESULT_VARIABLE HAS_CURL_STATIC)
+      unset(libchecker)
+      unset(searchpattern)
+      if(HAS_CURL_STATIC EQUAL 0)
+        set(HAS_CURL_STATIC TRUE)
+      else()
+        set(HAS_CURL_STATIC FALSE)
+      endif()
+      set(HAS_CURL_STATIC ${HAS_CURL_STATIC} CACHE INTERNAL
+          "OpenSSL is statically linked into Curl")
+      message(STATUS "OpenSSL is statically linked into Curl: ${HAS_CURL_STATIC}")
+    endif()
   endif()
 
-  find_soname(CURL)
+  if(HAS_CURL_STATIC)
+    set(CURL_DEFINITIONS -DHAS_CURL_STATIC=1)
+  endif()
 
-  if(EXISTS "${CURL_LIBRARY_DIRS}/${CURL_SONAME}")
-    execute_process(COMMAND readelf -s ${CURL_LIBRARY_DIRS}/${CURL_SONAME} COMMAND grep CRYPTO_set_locking_call OUTPUT_VARIABLE HAS_CURL_STATIC)
-  else()
-    message(FATAL_ERROR "curl library not found")
+  if(NOT TARGET Curl::Curl)
+    add_library(Curl::Curl UNKNOWN IMPORTED)
+    set_target_properties(Curl::Curl PROPERTIES
+                                     IMPORTED_LOCATION "${CURL_LIBRARY}"
+                                     INTERFACE_INCLUDE_DIRECTORIES "${CURL_INCLUDE_DIR}")
+    if(HAS_CURL_STATIC)
+        set_target_properties(Curl::Curl PROPERTIES
+                                         INTERFACE_COMPILE_DEFINITIONS HAS_CURL_STATIC=1)
+    endif()
   endif()
 endif()
 
-if(HAS_CURL_STATIC)
-  mark_as_advanced(HAS_CURL_STATIC)
-  list(APPEND CURL_DEFINITIONS -DHAS_CURL_STATIC=1)
-endif()
+mark_as_advanced(CURL_INCLUDE_DIR CURL_LIBRARY)