vim-patch:9.0.1963: Configure script may not detect xattr

Problem:  Configure script may not detect xattr correctly
Solution: include sys/xattr instead of attr/xattr,
          make Test_write_with_xattr_support() test
          xattr feature correctly

This also applies to the Smack security feature, so change the include
and configure script for it as well.

closes: vim/vim#13229

6de4e58cf2

cmake.config/CMakeLists.txt

@@ -36,11 +36,13 @@ check_symbol_exists(_NSGetEnviron crt_externs.h HAVE__NSGETENVIRON)
 # Headers
 check_include_files(langinfo.h HAVE_LANGINFO_H)
 check_include_files(strings.h HAVE_STRINGS_H)
-check_include_files(attr/xattr.h HAVE_XATTR)
 check_include_files(sys/utsname.h HAVE_SYS_UTSNAME_H)
 check_include_files(termios.h HAVE_TERMIOS_H)
 check_include_files(sys/uio.h HAVE_SYS_UIO_H)
 check_include_files(sys/sdt.h HAVE_SYS_SDT_H)
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  check_include_files(sys/xattr.h HAVE_XATTR)
+endif()
 
 # Functions
 check_function_exists(fseeko HAVE_FSEEKO)

src/nvim/os/fs.c

@@ -30,7 +30,7 @@
 #endif
 
 #ifdef HAVE_XATTR
-# include <attr/xattr.h>
+# include <sys/xattr.h>
 # define XATTR_VAL_LEN 1024
 #endif
 

test/old/testdir/test_writefile.vim

@@ -992,6 +992,7 @@ endfunc
 
 func Test_write_with_xattr_support()
   CheckLinux
+  CheckFeature xattr
   CheckExecutable setfattr
 
   let contents = ["file with xattrs", "line two"]