CMake: Add FindPPS and use it in src/corelib/configure.cmake

Find the PPS library and use the result PPS_FOUND in configure.cmake where
needed.

Change-Id: I08d3ace421278dc0ae5c3128d4234e6bca906c05
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

cmake/FindPPS.cmake

@@ -0,0 +1,19 @@
+# Find the PPS library
+
+# Will make the target PPS::PPS available when found.
+
+find_library(PPS_LIBRARY NAMES "pps")
+find_path(PPS_INCLUDE_DIR NAMES "sys/pps.h" DOC "The PPS Include path")
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PPS DEFAULT_MSG PPS_INCLUDE_DIR PPS_LIBRARY)
+
+mark_as_advanced(PPS_INCLUDE_DIR PPS_LIBRARY)
+
+if(PPS_FOUND)
+    add_library(__PPS IMPORTED)
+    target_link_libraries(__PPS INTERFACE ${PPS_LIBRARY})
+    target_include_directories(__PPS INTERFACE ${PPS_INCLUDE_DIR})
+
+    add_library(PPS::PPS ALIAS __PPS)
+endif()

src/corelib/CMakeLists.txt

@@ -508,7 +508,7 @@ extend_target(Core CONDITION QNX AND QT_FEATURE_qqnx_pps
         kernel/qppsattributeprivate_p.h
         kernel/qppsobject.cpp kernel/qppsobject_p.h
         kernel/qppsobjectprivate_p.h
-    LIBRARIES pps
+    LIBRARIES PPS::PPS
 )
 
 ## clock_gettime:

src/corelib/configure.cmake

@@ -22,6 +22,8 @@ find_package(WrapRt)
 set_package_properties(WrapRt PROPERTIES TYPE OPTIONAL)
 find_package(PCRE2)
 set_package_properties(PCRE2 PROPERTIES TYPE REQUIRED)
+find_package(PPS)
+set_package_properties(PPS PROPERTIES TYPE OPTIONAL)
 
 
 #### Tests
@@ -460,7 +462,7 @@ qt_feature("poll_select" PUBLIC PRIVATE
 qt_feature_definition("poll_select" "QT_NO_NATIVE_POLL")
 qt_feature("qqnx_pps" PRIVATE
     LABEL "PPS"
-    CONDITION libs.pps OR FIXME
+    CONDITION PPS_FOUND
     EMIT_IF QNX
 )
 qt_feature("renameat2" PRIVATE

util/cmake/configurejson2cmake.py

@@ -73,6 +73,7 @@ def map_library(lib: str) -> Union[str, LibraryMapping, List[str]]:
        'openssl_headers': LibraryMapping(package="OpenSSL", resultVariable="OPENSSL_INCLUDE_DIR", appendFoundSuffix=False),
        'pcre2': ['PCRE2', 'REQUIRED'],
        'posix_iconv': None,
+       'pps': 'PPS',
        'sun_iconv': None,
        'udev': 'Libudev',
        'vulkan': 'Vulkan',