[libc] Migrate to using LIBC_NAMESPACE_DECL for namespace declaration (#98597)

This is a part of #97655.

1 files changed, 3 insertions, 2 deletions

diff --git a/libc/test/UnitTest/HermeticTestUtils.cpp b/libc/test/UnitTest/HermeticTestUtils.cpp
index ca854ad94393..85e5cf02ff61 100644
--- a/libc/test/UnitTest/HermeticTestUtils.cpp
+++ b/libc/test/UnitTest/HermeticTestUtils.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "src/__support/common.h"
+#include "src/__support/macros/config.h"
 #include <stddef.h>
 #include <stdint.h>
 
@@ -14,7 +15,7 @@
 #include "src/sys/auxv/getauxval.h"
 #endif
 
-namespace LIBC_NAMESPACE {
+namespace LIBC_NAMESPACE_DECL {
 
 int bcmp(const void *lhs, const void *rhs, size_t count);
 void bzero(void *ptr, size_t count);
@@ -30,7 +31,7 @@ int atexit(void (*func)(void));
 // always returns 0 to indicate a failure.
 [[gnu::weak]] unsigned long getauxval(unsigned long id) { return 0; }
 
-} // namespace LIBC_NAMESPACE
+} // namespace LIBC_NAMESPACE_DECL
 
 namespace {