1 files changed, 90 insertions, 0 deletions
diff --git a/cmake/QtGenerateLibHelpers.cmake b/cmake/QtGenerateLibHelpers.cmake
new file mode 100644
index 0000000000..06de484ac4
--- /dev/null
+++ b/cmake/QtGenerateLibHelpers.cmake
@@ -0,0 +1,90 @@
+# Given "/usr/lib/x86_64-linux-gnu/libcups.so"
+# Returns "cups" or an empty string if the file is not an absolute library path.
+# Aka it strips the "lib" prefix, the .so extension and the base path.
+function(qt_get_library_name_without_prefix_and_suffix out_var file_path)
+    set(out_value "")
+    if(IS_ABSOLUTE "${file_path}")
+        get_filename_component(basename "${file_path}" NAME_WE)
+        get_filename_component(ext "${file_path}" EXT)
+        foreach(libsuffix ${LIBRARY_SUFFIXES})
+            # Handle weird prefix extensions like in the case of
+            # "/usr/lib/x86_64-linux-gnu/libglib-2.0.so"
+            # it's ".0.so".
+            if(ext MATCHES "^(\\.[0-9]+)*${libsuffix}(\\.[0-9]+)*")
+                set(is_linkable_library TRUE)
+                set(weird_numbered_extension "${CMAKE_MATCH_1}")
+                break()
+            endif()
+        endforeach()
+        if(is_linkable_library)
+            set(out_value "${basename}")
+            if(LIBRARY_PREFIXES)
+                foreach(libprefix ${LIBRARY_PREFIXES})
+                    # Strip any library prefix like "lib" for a library that we will use with a link
+                    # flag.
+                    if(libprefix AND out_value MATCHES "^${libprefix}(.+)")
+                        set(out_value "${CMAKE_MATCH_1}")
+                        break()
+                    endif()
+                endforeach()
+            endif()
+            if(weird_numbered_extension)
+                set(out_value "${out_value}${weird_numbered_extension}")
+            endif()
+        endif()
+    endif()
+
+    # Reverse the dependency order to be in sync with what qmake generated .pri files
+    # have.
+    list(REVERSE out_list)
+
+    set(${out_var} "${out_value}" PARENT_SCOPE)
+endfunction()
+
+# Given "/usr/lib/x86_64-linux-gnu/libcups.so"
+# Returns "-lcups" or an empty string if the file is not an absolute library path.
+function(qt_get_library_with_link_flag out_var file_path)
+    qt_get_library_name_without_prefix_and_suffix(lib_name "${file_path}")
+
+    set(out_value "")
+    if(lib_name)
+        set(out_value "${lib_name}")
+        if(LINK_LIBRARY_FLAG)
+            string(PREPEND out_value "${LINK_LIBRARY_FLAG}")
+        endif()
+    endif()
+
+    set(${out_var} "${out_value}" PARENT_SCOPE)
+endfunction()
+
+# Given a list of potential library paths, returns a transformed list where absolute library paths
+# are replaced with library link flags.
+function(qt_transform_absolute_library_paths_to_link_flags out_var library_path_list)
+    set(out_list "")
+    foreach(library_path ${library_path_list})
+        qt_get_library_with_link_flag(lib_name_with_link_flag "${library_path}")
+        if(lib_name_with_link_flag)
+            list(APPEND out_list "${lib_name_with_link_flag}")
+        else()
+            list(APPEND out_list "${library_path}")
+        endif()
+    endforeach()
+    set(${out_var} "${out_list}" PARENT_SCOPE)
+endfunction()
+
+function(qt_strip_library_version_suffix out_var file_path)
+    get_filename_component(dir "${file_path}" DIRECTORY)
+    get_filename_component(basename "${file_path}" NAME_WE)
+    get_filename_component(ext "${file_path}" EXT)
+    foreach(libsuffix ${LIBRARY_SUFFIXES})
+        if(ext MATCHES "^${libsuffix}(\\.[0-9]+)+")
+            set(ext ${libsuffix})
+            break()
+        endif()
+    endforeach()
+    set(final_value "${basename}${ext}")
+    if(dir)
+        set(final_value "${dir}/${final_value}")
+    endif()
+    set(${out_var} "${final_value}" PARENT_SCOPE)
+endfunction()