[build] option to use system-provided libxxhash

--with-xxhash

SConstruct

@@ -267,6 +267,7 @@ vars.AddVariables(
 	# with_valgrind not supported
 	# with_xattr not supported
 	PackageVariable('with_xml', 'enable xml support (required for webdav props)', 'no'),
+	BoolVariable('with_xxhash', 'build with system-provided xxhash', 'no'),
 	BoolVariable('with_zlib', 'enable deflate/gzip compression', 'no'),
 
 	BoolVariable('with_all', 'enable all with_* features', 'no'),
@@ -350,6 +351,7 @@ if 1:
 		LIBUUID = '',
 		LIBX509 = '',
 		LIBXML2 = '',
+		LIBXXHASH = '',
 		LIBZ = '',
 	)
 
@@ -709,6 +711,14 @@ if 1:
 			fail("Couldn't find xml2")
 		autoconf.env.Append(CPPFLAGS = [ '-DHAVE_LIBXML_H', '-DHAVE_LIBXML2' ])
 
+	if env['with_xxhash']:
+		if not autoconf.CheckLibWithHeader('xxhash', 'xxhash.h', 'C'):
+			fail("Couldn't find xxhash")
+		autoconf.env.Append(
+			CPPFLAGS = [ '-DHAVE_XXHASH_H' ],
+			LIBXXHASH = 'xxhash',
+		)
+
 	if env['with_zlib']:
 		if not autoconf.CheckLibWithHeader('z', 'zlib.h', 'C'):
 			fail("Couldn't find zlib")

configure.ac

@@ -1181,6 +1181,34 @@ if test "$WITH_WEBDAV_LOCKS" != no; then
   AC_SUBST([UUID_LIBS])
 fi
 
+dnl xxhash
+AC_MSG_NOTICE([----------------------------------------])
+AC_MSG_CHECKING([for xxhash support])
+AC_ARG_WITH([xxhash],
+  [AC_HELP_STRING([--with-xxhash],
+    [Enable system-provided xxhash]
+  )],
+  [WITH_XXHASH=$withval],
+  [WITH_XXHASH=no]
+)
+AC_MSG_RESULT([$WITH_XXHASH])
+
+if test "$WITH_XXHASH" != no; then
+  if test "$WITH_XXHASH" != yes; then
+    XXHASH_LIBS="-L$WITH_XXHASH -lxxhash"
+    CPPFLAGS="$CPPFLAGS -I$WITH_XXHASH"
+  else
+    PKG_CHECK_MODULES([XXHASH], [libxxhash], [], [
+      AC_MSG_ERROR([xxhash not found, install it or build without --with-xxhash])
+    ])
+  fi
+
+  AC_DEFINE([HAVE_XXHASH_H], [1], [xxhash.h])
+  AC_DEFINE([HAVE_XXHASH], [1], [xxhash])
+  AC_SUBST([XXHASH_CFLAGS])
+  AC_SUBST([XXHASH_LIBS])
+fi
+
 dnl Check for gdbm
 AC_MSG_NOTICE([----------------------------------------])
 AC_MSG_CHECKING([for gdbm])

src/CMakeLists.txt

@@ -45,6 +45,7 @@ option(WITH_LIBUNWIND "with libunwind to print backtraces in asserts [default: o
 option(WITH_GEOIP "with GeoIP-support mod_geoip [default: off]")
 option(WITH_MAXMINDDB "with MaxMind GeoIP2-support mod_maxminddb [default: off]")
 option(WITH_SASL "with SASL-support for mod_authn_sasl [default: off]")
+option(WITH_XXHASH "with system-provided xxhash [default: off]")
 
 if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
 	option(BUILD_EXTRA_WARNINGS "extra warnings")
@@ -564,6 +565,14 @@ else()
 	unset(HAVE_LIBUUID)
 endif()
 
+if(WITH_XXHASH)
+	check_include_files(xxhash.h HAVE_XXHASH_H)
+	check_library_exists(xxhash XXH_versionNumber "" HAVE_XXHASH)
+else()
+	unset(HAVE_XXHASH_H)
+	unset(HAVE_XXHASH)
+endif()
+
 if(WITH_ZLIB)
 	if(NOT WIN32)
 		check_include_files(zlib.h HAVE_ZLIB_H)
@@ -1083,6 +1092,10 @@ if(HAVE_XATTR)
 	target_link_libraries(lighttpd attr)
 endif()
 
+if(HAVE_XXHASH)
+	target_link_libraries(lighttpd xxhash)
+endif()
+
 if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -Wall -g -Wshadow -W -pedantic ${WARN_CFLAGS}")
 	set(CMAKE_C_FLAGS_RELEASE        "${CMAKE_C_FLAGS_RELEASE}     -O2")

src/Makefile.am

@@ -520,7 +520,7 @@ lighttpd_CPPFLAGS = \
   $(FAM_CFLAGS) $(LIBEV_CFLAGS) $(LIBUNWIND_CFLAGS)
 lighttpd_LDADD = \
   $(common_libadd) \
-  $(CRYPT_LIB) $(CRYPTO_LIB) \
+  $(CRYPT_LIB) $(CRYPTO_LIB) $(XXHASH_LIBS) \
   $(XML_LIBS) $(SQLITE_LIBS) $(UUID_LIBS) $(ELFTC_LIB) \
   $(PCRE_LIB) $(Z_LIB) $(BZ_LIB) $(BROTLI_LIBS) \
   $(DL_LIB) $(SENDFILE_LIB) $(ATTR_LIB) \
@@ -608,7 +608,7 @@ else
 ## default lighttpd server
 lighttpd_SOURCES = $(src)
 lighttpd_CPPFLAGS = $(FAM_CFLAGS) $(LIBEV_CFLAGS)
-lighttpd_LDADD = $(PCRE_LIB) $(DL_LIB) $(SENDFILE_LIB) $(ATTR_LIB) $(common_libadd) $(CRYPTO_LIB) $(FAM_LIBS) $(LIBEV_LIBS) $(LIBUNWIND_LIBS)
+lighttpd_LDADD = $(PCRE_LIB) $(DL_LIB) $(SENDFILE_LIB) $(ATTR_LIB) $(common_libadd) $(CRYPTO_LIB) $(XXHASH_LIBS) $(FAM_LIBS) $(LIBEV_LIBS) $(LIBUNWIND_LIBS)
 lighttpd_LDFLAGS = -export-dynamic
 
 endif

src/SConscript

@@ -309,6 +309,7 @@ instbin = env.Program(bin_targets, src, LINKFLAGS = bin_linkflags,
 		env['LIBCRYPTO'],
 		env['LIBDL'],
 		env['LIBPCRE'],
+		env['LIBXXHASH'],
 	)
 )
 env.Depends(instbin, configparser)

src/meson.build

@@ -635,6 +635,20 @@ if get_option('with_xattr')
     endif
 endif
 
+libxxhash = []
+if get_option('with_xxhash')
+	libxxhash = dependency('libxxhash', required: false)
+	if libxxhash.found()
+		libxxhash = [ libxxhash ]
+	else
+		libxxhash = [ compiler.find_library('xxhash') ]
+		if not(compiler.has_function('XXH_versionNumber', args: defs, dependencies: libxxhash, prefix: '#include <xxhash.h>'))
+			error('Couldn\'t find xxhash/xxhash.h or XXH_versionNumber in lib xxhash')
+		endif
+	endif
+	conf_data.set('HAVE_XXHASH_H', true)
+endif
+
 libz = []
 if get_option('with_zlib')
 	libz = dependency('zlib', required: false)
@@ -804,6 +818,7 @@ executable('lighttpd', configparser,
 		, libfam
 		, libpcre
 		, libunwind
+		, libxxhash
 		, libws2_32
 	],
 	install: true,