[glibc] nss: Fix build error with --disable-nscd

[Florian Weimer <fw@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=135425a1dd50cbe2b9db0628d6c2b36c7889f30b

commit 135425a1dd50cbe2b9db0628d6c2b36c7889f30b
Author: Cooper Qu <cooper.qu@linux.alibaba.com>
Date:   Tue Jul 13 20:50:40 2021 +0800

    nss: Fix build error with --disable-nscd
    
    The error is as follows:
    nss_module.c: In function 'module_load_nss_files':
    nss_module.c:117:7: error: 'is_nscd' undeclared (first use in this function)
      117 |   if (is_nscd)
          |       ^~~~~~~
    nss_module.c:117:7: note: each undeclared identifier is reported only once for each function it appears in
    nss_module.c:119:51: error: 'nscd_init_cb' undeclared (first use in this function); did you mean 'nscd_init'?
      119 |       void (*cb) (size_t, struct traced_file *) = nscd_init_cb;
          |                                                   ^~~~~~~~~~~~
          |                                                   nscd_init

Diff:
---
 nss/nss_module.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/nss/nss_module.c b/nss/nss_module.c
index 7b42c585a4..7ea5ad9887 100644
--- a/nss/nss_module.c
+++ b/nss/nss_module.c
@@ -114,14 +114,16 @@ static const function_name nss_function_name_array[] =
 static bool
 module_load_nss_files (struct nss_module *module)
 {
+#ifdef USE_NSCD
   if (is_nscd)
     {
       void (*cb) (size_t, struct traced_file *) = nscd_init_cb;
-#  ifdef PTR_DEMANGLE
+# ifdef PTR_DEMANGLE
       PTR_DEMANGLE (cb);
-#  endif
+# endif
       _nss_files_init (cb);
     }
+#endif
 
   /* Initialize the function pointers, following the double-checked
      locking idiom.  */