--- qt6-webengine-6.4.2.orig/src/3rdparty/chromium/base/process/memory_linux.cc
+++ qt6-webengine-6.4.2/src/3rdparty/chromium/base/process/memory_linux.cc
@@ -18,6 +18,13 @@
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 
+#if defined(LIBC_GLIBC)
+extern "C" {
+extern void *__libc_malloc(size_t size);
+extern void *__libc_free(void *ptr);
+}
+#endif
+
 namespace base {
 
 namespace {
@@ -112,7 +119,7 @@ bool UncheckedMalloc(size_t size, void**
     defined(TOOLKIT_QT) || !defined(LIBC_GLIBC)
   *result = malloc(size);
 #elif defined(LIBC_GLIBC)
-  *result = __libc_malloc(size);
+  *result = ::__libc_malloc(size);
 #endif
   return *result != nullptr;
 }
@@ -123,7 +130,7 @@ void UncheckedFree(void* ptr) {
 #elif defined(MEMORY_TOOL_REPLACES_ALLOCATOR) || !defined(LIBC_GLIBC) || defined(TOOLKIT_QT)
   free(ptr);
 #elif defined(LIBC_GLIBC)
-  __libc_free(ptr);
+  ::__libc_free(ptr);
 #endif
 }