cmake: fix manual library discovery

[m6w6/libmemcached] / CMake / CheckDependency.cmake

diff --git a/CMake/CheckDependency.cmake b/CMake/CheckDependency.cmake
index bc7ecaa267c2082f35f71a9634ff8a62fe5bdbae..7932b55a3c9783f1f7a2747b32324687c7a37ada 100644 (file)
--- a/CMake/CheckDependency.cmake
+++ b/CMake/CheckDependency.cmake
@@ -1,57 +1,44 @@
 find_package(PkgConfig)
 
-include(SafeString)
-include(CheckHeader)
+function(check_dependency NAME LIB)
+    make_have_identifier(${NAME} HAVE)
+    configure_define(${HAVE})
 
-function(check_dependency_basic NAME LIB HEADER)
-       set(FOUND 1)
-       message("-- Checking for library '${LIB}' with header '${HEADER}' ...")
-       find_library(LIB${LIB} NAMES ${LIB})
-       if(NOT LIB${LIB})
-               set(FOUND 0)
-       endif()
-       if(HEADER)
-               safe_string(${HEADER} HEADER_CONST)
-               check_header(${HEADER})
-               if(NOT HAVE_${HEADER_CONST})
-                       set(FOUND 0)
-               else()
-                       find_path(${HEADER_CONST}_ROOT ${HEADER})
-                       if(NOT ${HEADER_CONST}_ROOT)
-                               set(FOUND 0)
-                       endif()
-               endif()
-       endif()
-       if(FOUND)
-               message("--   Found library '${LIB${LIB}}'")
-               message("--   Found include '${${HEADER_CONST}_ROOT}'")
-       else()
-               message("--   No library '${LIB}' found")
-       endif()
-       set(${NAME} ${FOUND} PARENT_SCOPE)
-       set(${NAME}_LIBRARIES ${LIB${LIB}} PARENT_SCOPE)
-       set(${NAME}_INCLUDEDIR ${${HEADER_CONST}_ROOT} PARENT_SCOPE)
-endfunction()
-
-function(check_dependency NAME LIB HEADER)
     if(PKG_CONFIG_FOUND)
         pkg_check_modules(${NAME} lib${LIB}${ARGN} IMPORTED_TARGET)
         if(NOT ${NAME}_FOUND)
-            pkg_check_modules(${NAME} ${LIB}${ARGN})
+            pkg_check_modules(${NAME} ${LIB}${ARGN} IMPORTED_TARGET)
         endif()
-               if(NOT ${NAME}_FOUND)
-                       check_dependency_basic(${NAME} ${LIB} ${HEADER})
-               else()
-                       set(${NAME} ${${NAME}_FOUND} PARENT_SCOPE)
-                       set(${NAME}_LIBRARIES ${${NAME}_LDFLAGS} PARENT_SCOPE)
-                       set(${NAME}_INCLUDEDIR ${${NAME}_INCLUDEDIR} PARENT_SCOPE)
+        if(${NAME}_FOUND)
+            set(${NAME} PkgConfig::${NAME} CACHE INTERNAL "${NAME} import target")
+            set(${HAVE} 1 CACHE INTERNAL "${HAVE}")
+            return()
+        endif()
+    endif()
 
-                       safe_string(${LIB} LIB_CONST)
-                       set(HAVE_${NAME} ${${NAME}_FOUND} PARENT_SCOPE)
-                       safe_string(${HEADER} HEADER_CONST)
-                       find_path(HAVE_${HEADER_CONST} ${HEADER} PATHS ${${NAME}_INCLUDEDIR})
-               endif()
-    else()
-               check_dependency_basic(${NAME} ${LIB} ${HEADER})
+    message(STATUS "Checking for library '${LIB}' ...")
+    find_library(${NAME}_LIB NAMES ${LIB})
+    if(${NAME}_LIB)
+        mark_as_advanced(${NAME}_LIB)
+        message(STATUS "  Found '${${NAME}_LIB}'")
+
+        set(${NAME}_INCLUDES "")
+        foreach(PATH IN_LIST CMAKE_PREFIX_PATHS)
+            if(${NAME}_LIB MATCHES "^${PATH}")
+                set(${NAME}_INCLUDES "${PATH}/include")
+                break()
+            endif()
+        endforeach()
+
+        add_library(Imported::${NAME} INTERFACE IMPORTED)
+        set_target_properties(Imported::${NAME} PROPERTIES
+                INTERFACE_INCLUDE_DIRECTORIES "${${NAME}_INCLUDES}"
+                INTERFACE_LINK_LIBRARIES ${${NAME}_LIB})
+
+        set(${NAME} Imported::${NAME} CACHE INTERNAL "${NAME} import target")
+        set(${HAVE} 1 CACHE INTERNAL "${HAVE}")
+        return()
     endif()
+
+    message(STATUS "  Not found")
 endfunction()