bpo-34652: Remove lchmod from the big func checking block. (GH-9247)

A fix for 883702e.
(cherry picked from commit ed709d5)

Co-authored-by: Benjamin Peterson <[email protected]>

Author: miss-islington

configure

@@ -11327,7 +11327,7 @@ for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
  getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getresuid getresgid getpwent getspnam getspent getsid getwd \
  if_nameindex \
- initgroups kill killpg lchmod lchown lockf linkat lstat lutimes mmap \
+ initgroups kill killpg lchown lockf linkat lstat lutimes mmap \
  memrchr mbrtowc mkdirat mkfifo \
  mkfifoat mknod mknodat mktime mremap nice openat pathconf pause pipe2 plock poll \
  posix_fallocate posix_fadvise posix_spawn pread preadv preadv2 \
@@ -11358,10 +11358,16 @@ done
 # links. Some libc implementations have a stub lchmod implementation that always
 # returns an error.
 if test "$MACHDEP" != linux; then
+  for ac_func in lchmod
+do :
   ac_fn_c_check_func "$LINENO" "lchmod" "ac_cv_func_lchmod"
 if test "x$ac_cv_func_lchmod" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LCHMOD 1
+_ACEOF
 
 fi
+done
 
 fi
 

configure.ac

@@ -3503,7 +3503,7 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
  getgrouplist getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getresuid getresgid getpwent getspnam getspent getsid getwd \
  if_nameindex \
- initgroups kill killpg lchmod lchown lockf linkat lstat lutimes mmap \
+ initgroups kill killpg lchown lockf linkat lstat lutimes mmap \
  memrchr mbrtowc mkdirat mkfifo \
  mkfifoat mknod mknodat mktime mremap nice openat pathconf pause pipe2 plock poll \
  posix_fallocate posix_fadvise posix_spawn pread preadv preadv2 \
@@ -3523,7 +3523,7 @@ AC_CHECK_FUNCS(alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
 # links. Some libc implementations have a stub lchmod implementation that always
 # returns an error.
 if test "$MACHDEP" != linux; then
-  AC_CHECK_FUNC(lchmod)
+  AC_CHECK_FUNCS(lchmod)
 fi
 
 AC_CHECK_DECL(dirfd,