qt5base-lts/cmake/FindWrapDBus1.cmake

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# DBus1 is buggy and breaks PKG_CONFIG environment.
# Work around that:-/
# See https://gitlab.freedesktop.org/dbus/dbus/issues/267 for more information
if(DEFINED ENV{PKG_CONFIG_DIR})
set(__qt_dbus_pcd "$ENV{PKG_CONFIG_DIR}")
endif()
if(DEFINED ENV{PKG_CONFIG_PATH})
set(__qt_dbus_pcp "$ENV{PKG_CONFIG_PATH}")
endif()
if(DEFINED ENV{PKG_CONFIG_LIBDIR})
set(__qt_dbus_pcl "$ENV{PKG_CONFIG_LIBDIR}")
endif()
find_package(DBus1)
if(DEFINED __qt_dbus_pcd)
set(ENV{PKG_CONFIG_DIR} "${__qt_dbus_pcd}")
else()
unset(ENV{PKG_CONFIG_DIR})
endif()
if(DEFINED __qt_dbus_pcp)
set(ENV{PKG_CONFIG_PATH} "${__qt_dbus_pcp}")
else()
unset(ENV{PKG_CONFIG_PATH})
endif()
if(DEFINED __qt_dbus_pcl)
set(ENV{PKG_CONFIG_LIBDIR} "${__qt_dbus_pcl}")
else()
unset(ENV{PKG_CONFIG_LIBDIR})
endif()