QtCore: Use system-wide libb2 if present

This adds the option to build Qt with libb2, which is especially
recommended, if you care about the performance of the BLAKE2 hashing
algorithms. The bundled version is the pure reference C implementation
of BLAKE2, while libb2 has many additional hardware optimizations.
However, the API of both is the same, so no changes to the code were
necessary here.

Change-Id: I3563982f4e07be300291fe103c38b16a404b3ebb
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

1 files changed, 13 insertions, 8 deletions

diff --git a/src/corelib/.prev_CMakeLists.txt b/src/corelib/.prev_CMakeLists.txt
index 4ae1329db7..e143581087 100644
--- a/src/corelib/.prev_CMakeLists.txt
+++ b/src/corelib/.prev_CMakeLists.txt
@@ -642,6 +642,11 @@ qt_extend_target(Core CONDITION QT_FEATURE_doubleconversion AND NOT QT_FEATURE_s
         ../3rdparty/double-conversion/include
 )
 
+qt_extend_target(Core CONDITION QT_FEATURE_system_libb2
+    LIBRARIES
+        PkgConfig::Libb2
+)
+
 qt_extend_target(Core CONDITION QT_FEATURE_easingcurve
     SOURCES
         tools/qeasingcurve.cpp tools/qeasingcurve.h
@@ -1018,7 +1023,7 @@ qt_extend_target(Core CONDITION QT_FEATURE_mimetype
         mimetypes/qmimetypeparser.cpp mimetypes/qmimetypeparser_p.h
 )
 
-#### Keys ignored in scope 180:.:mimetypes:mimetypes/mimetypes.pri:QT_FEATURE_mimetype:
+#### Keys ignored in scope 181:.:mimetypes:mimetypes/mimetypes.pri:QT_FEATURE_mimetype:
 # MIME_DATABASE = "mimetypes/mime/packages/freedesktop.org.xml"
 # OTHER_FILES = "$$MIME_DATABASE"
 
@@ -1027,7 +1032,7 @@ qt_extend_target(Core CONDITION QT_FEATURE_mimetype AND QT_FEATURE_mimetype_data
         .rcc
 )
 
-#### Keys ignored in scope 181:.:mimetypes:mimetypes/mimetypes.pri:QT_FEATURE_mimetype_database:
+#### Keys ignored in scope 182:.:mimetypes:mimetypes/mimetypes.pri:QT_FEATURE_mimetype_database:
 # QMAKE_EXTRA_COMPILERS = "mimedb"
 # mimedb.commands = "${QMAKE_FILE_IN}" ">" "${QMAKE_FILE_OUT}"
 # mimedb.depends = "$$PWD/mime/generate.pl"
@@ -1035,23 +1040,23 @@ qt_extend_target(Core CONDITION QT_FEATURE_mimetype AND QT_FEATURE_mimetype_data
 # mimedb.output = "$$outpath/qmimeprovider_database.cpp"
 # mimedb.variable_out = "INCLUDED_SOURCES"
 
-#### Keys ignored in scope 182:.:mimetypes:mimetypes/mimetypes.pri:ANDROID:
+#### Keys ignored in scope 183:.:mimetypes:mimetypes/mimetypes.pri:ANDROID:
 # outpath = "$$outpath/$${QT_ARCH}"
 
-#### Keys ignored in scope 184:.:mimetypes:mimetypes/mimetypes.pri:(CMAKE_BUILD_TYPE STREQUAL Debug):
+#### Keys ignored in scope 185:.:mimetypes:mimetypes/mimetypes.pri:(CMAKE_BUILD_TYPE STREQUAL Debug):
 # outpath = "$$outpath/debug"
 
-#### Keys ignored in scope 185:.:mimetypes:mimetypes/mimetypes.pri:else:
+#### Keys ignored in scope 186:.:mimetypes:mimetypes/mimetypes.pri:else:
 # outpath = "$$outpath/release"
 
-#### Keys ignored in scope 186:.:mimetypes:mimetypes/mimetypes.pri:MAKEFILE_GENERATOR___equals___MSVC.NET OR MAKEFILE_GENERATOR___equals___MSBUILD OR QMAKE_SH_ISEMPTY:
+#### Keys ignored in scope 187:.:mimetypes:mimetypes/mimetypes.pri:MAKEFILE_GENERATOR___equals___MSVC.NET OR MAKEFILE_GENERATOR___equals___MSBUILD OR QMAKE_SH_ISEMPTY:
 # mimedb.commands = "cmd" "/c" "$$shell_path($$PWD/mime/generate.bat)"
 # mimedb.depends = "$$PWD/mime/generate.bat" "$$PWD/mime/hexdump.ps1"
 
-#### Keys ignored in scope 187:.:mimetypes:mimetypes/mimetypes.pri:else:
+#### Keys ignored in scope 188:.:mimetypes:mimetypes/mimetypes.pri:else:
 # mimedb.commands = "perl" "$${mimedb.depends}"
 
-#### Keys ignored in scope 188:.:mimetypes:mimetypes/mimetypes.pri:QT_FEATURE_zstd:
+#### Keys ignored in scope 189:.:mimetypes:mimetypes/mimetypes.pri:QT_FEATURE_zstd:
 # mimedb.commands = "--zstd"
 
 qt_extend_target(Core CONDITION WASM