Add module to find libmount

There is a chance it's going to be used in Solid, and possibly KIO.

Other exiting modules were used as templates while writing this.

1 files changed, 71 insertions, 0 deletions

diff --git a/find-modules/FindLibMount.cmake b/find-modules/FindLibMount.cmake
new file mode 100644
index 00000000..3fcde4c5
--- /dev/null
+++ b/find-modules/FindLibMount.cmake
@@ -0,0 +1,71 @@
+# SPDX-FileCopyrightText: 2021 Ahmad Samir <a.samirh78@gmail.com>
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+#[=======================================================================[.rst:
+
+FindLibMount
+------------
+
+Try to find the libmount library (part of util-linux), once done this will define:
+
+``LibMount_FOUND``
+    LibMount was found on the system.
+
+``LibMount_INCLUDE_DIRS``
+    The libmount include directory.
+
+``LibMount_LIBRARIES``
+    The libmount libraries.
+
+``LibMount_VERSION``
+    The libmount version.
+
+If ``LibMount_FOUND`` is TRUE, it will also define the following imported target:
+
+``LibMount::LibMount``
+    The libmount library
+
+Since 5.83.0
+#]=======================================================================]
+
+find_package(PkgConfig QUIET)
+pkg_check_modules(PC_LIBMOUNT QUIET mount)
+
+find_path(LibMount_INCLUDE_DIRS NAMES libmount/libmount.h HINTS ${PC_LIBMOUNT_INCLUDE_DIRS})
+find_library(LibMount_LIBRARIES NAMES mount HINTS ${PC_LIBMOUNT_LIBRARY_DIRS})
+
+set(LibMount_VERSION ${PC_LIBMOUNT_VERSION})
+
+if(LibMount_INCLUDE_DIRS AND NOT LibMount_VERSION)
+    file(READ "${LibMount_INCLUDE_DIRS}/libmount/libmount.h" _LibMount_header_contents)
+    string(REGEX MATCHALL "#define[ \t]+LIBMOUNT_VERSION[ \t]+\"*[0-9.]+" _LibMount_version_line "${_LibMount_header_contents}")
+    unset(_LibMount_header_contents)
+    string(REGEX REPLACE ".*LIBMOUNT_VERSION[ \t]+\"*([0-9.]+)\"*" "\\1" _version "${_LibMount_version_line}")
+    set(LibMount_VERSION "${_version}")
+    unset(_LibMount_version_line)
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(LibMount
+    FOUND_VAR LibMount_FOUND
+    REQUIRED_VARS LibMount_INCLUDE_DIRS LibMount_LIBRARIES
+    VERSION_VAR LibMount_VERSION
+)
+
+mark_as_advanced(LibMount_INCLUDE_DIRS LibMount_LIBRARIES)
+
+if(LibMount_FOUND AND NOT TARGET LibMount::LibMount)
+    add_library(LibMount::LibMount UNKNOWN IMPORTED)
+    set_target_properties(LibMount::LibMount PROPERTIES
+        IMPORTED_LOCATION "${LibMount_LIBRARIES}"
+        INTERFACE_INCLUDE_DIRECTORIES "${LibMount_INCLUDE_DIRS}"
+        INTERFACE_COMPILE_DEFINITIONS "${PC_LIBMOUNT_CFLAGS_OTHER}"
+    )
+endif()
+
+include(FeatureSummary)
+set_package_properties(LibMount PROPERTIES
+    DESCRIPTION "API for getting info about mounted filesystems (part of util-linux)"
+    URL "https://www.kernel.org/pub/linux/utils/util-linux/"
+)