PkgC: Document cmake variables

Help/manual/cmake-variables.7.rst

@@ -253,6 +253,11 @@ Variables that Change Behavior
    /variable/CMAKE_MESSAGE_LOG_LEVEL
    /variable/CMAKE_MFC_FLAG
    /variable/CMAKE_MODULE_PATH
+   /variable/CMAKE_PKG_CONFIG_DISABLE_UNINSTALLED
+   /variable/CMAKE_PKG_CONFIG_PC_LIB_DIRS
+   /variable/CMAKE_PKG_CONFIG_PC_PATH
+   /variable/CMAKE_PKG_CONFIG_SYSROOT_DIR
+   /variable/CMAKE_PKG_CONFIG_TOP_BUILD_DIR
    /variable/CMAKE_POLICY_DEFAULT_CMPNNNN
    /variable/CMAKE_POLICY_VERSION_MINIMUM
    /variable/CMAKE_POLICY_WARNING_CMPNNNN

Help/variable/CMAKE_PKG_CONFIG_DISABLE_UNINSTALLED.rst

@@ -0,0 +1,9 @@
+CMAKE_PKG_CONFIG_DISABLE_UNINSTALLED
+------------------------------------
+
+.. versionadded:: 4.0
+
+Enable / Disable the default "uninstalled" search behavior of the
+:command:`cmake_pkg_config` command. When this variable is false, package files
+with an "-uninstalled" suffix have higher priority than exact package name
+matches.

Help/variable/CMAKE_PKG_CONFIG_PC_LIB_DIRS.rst

@@ -0,0 +1,8 @@
+CMAKE_PKG_CONFIG_PC_LIB_DIRS
+----------------------------
+
+.. versionadded:: 4.0
+
+:ref:`Semicolon-separated list <CMake Language Lists>` of primary paths which
+the :command:`cmake_pkg_config` command will search for package files by
+default. Also used to derive the ``pc_path`` package variable.

Help/variable/CMAKE_PKG_CONFIG_PC_PATH.rst

@@ -0,0 +1,8 @@
+CMAKE_PKG_CONFIG_PC_PATH
+------------------------
+
+.. versionadded:: 4.0
+
+:ref:`Semicolon-separated list <CMake Language Lists>` of supplementary paths
+which the :command:`cmake_pkg_config` command will search for package files by
+efault. Also used to derive the ``pc_path`` package variable.

Help/variable/CMAKE_PKG_CONFIG_SYSROOT_DIR.rst

@@ -0,0 +1,8 @@
+CMAKE_PKG_CONFIG_SYSROOT_DIR
+----------------------------
+
+.. versionadded:: 4.0
+
+Path prepended to ``-I`` include directories and ``-L`` library directories
+extracted by the :command:`cmake_pkg_config` command by default. Also used to
+derive the ``pc_sysrootdir`` package variable.

Help/variable/CMAKE_PKG_CONFIG_TOP_BUILD_DIR.rst

@@ -0,0 +1,7 @@
+CMAKE_PKG_CONFIG_TOP_BUILD_DIR
+------------------------------
+
+.. versionadded:: 4.0
+
+Path used to derive the ``pc_top_builddir`` package variable by the
+:command:`cmake_pkg_config` command by default.