cmake HAVE_DECL_EXTATTR_NAMESPACE_USER examples

cmake HAVE_DECL_EXTATTR_NAMESPACE_USER examples

libarchive/libarchive CMakeLists.txt :1841

CHECK_SYMBOL_EXISTS(EXTATTR_NAMESPACE_USER "sys/types.h;sys/extattr.h" HAVE_DECL_EXTATTR_NAMESPACE_USER)

libarchive/libarchive CMakeLists.txt :1858

ELSEIF(HAVE_SYS_EXTATTR_H AND HAVE_DECL_EXTATTR_NAMESPACE_USER)

alibaba/AliSQLBackup storage/innobase/xtrabackup/src/libarchive/CMakeLists.txt :757

CHECK_SYMBOL_EXISTS(EXTATTR_NAMESPACE_USER "sys/types.h;sys/extattr.h" HAVE_DECL_EXTATTR_NAMESPACE_USER)