Add variable-length array comments.

4 files changed, 4 insertions, 1 deletions

diff --git a/fbench/src/test/filereader.cpp b/fbench/src/test/filereader.cpp
index 87c5914e85b..b2061633d41 100644
--- a/fbench/src/test/filereader.cpp
+++ b/fbench/src/test/filereader.cpp
@@ -66,7 +66,7 @@ main(int argc, char **argv)
     return -1;
   }
   int res;
-  int buflen = 10240;
+  constexpr int buflen = 10240;
   char buf[buflen];
   while ((res = reader->ReadLine(buf, buflen - 1)) >= 0) {
     // printf("len=%d, content:>%s<\n", res, buf);
diff --git a/searchlib/src/tests/aggregator/perdocexpr_test.cpp b/searchlib/src/tests/aggregator/perdocexpr_test.cpp
index 908e50ad4d2..e9f0981739c 100644
--- a/searchlib/src/tests/aggregator/perdocexpr_test.cpp
+++ b/searchlib/src/tests/aggregator/perdocexpr_test.cpp
@@ -604,6 +604,7 @@ getVespaChecksumV2(const std::string& ymumid, int fid, const std::string& flags_
                  sizeof(networkFid)+
                  new_flags_str.length();
 
+    // GNU extension: Variable-length automatic array
     unsigned char buffer[length];
     memset(buffer, 0x00, length);
     memcpy(buffer, ymumid.c_str(), ymumid.length());
diff --git a/searchlib/src/vespa/searchlib/predicate/predicate_range_term_expander.h b/searchlib/src/vespa/searchlib/predicate/predicate_range_term_expander.h
index 7ff796e5b7d..8159d5c4147 100644
--- a/searchlib/src/vespa/searchlib/predicate/predicate_range_term_expander.h
+++ b/searchlib/src/vespa/searchlib/predicate/predicate_range_term_expander.h
@@ -50,6 +50,7 @@ void PredicateRangeTermExpander::expand(const vespalib::string &key, int64_t sig
         return;
     }
     size_t buffer_size = 21 * 2 + 3 + key.size(); // 2 numbers + punctuation + key
+    // GNU extension: Variable-length automatic array
     char buffer[buffer_size];
     int size;
     int prefix_size = snprintf(buffer, buffer_size, "%s=", key.c_str());
diff --git a/vespamalloc/src/vespamalloc/util/callstack.cpp b/vespamalloc/src/vespamalloc/util/callstack.cpp
index a0645f06815..b8449c89a72 100644
--- a/vespamalloc/src/vespamalloc/util/callstack.cpp
+++ b/vespamalloc/src/vespamalloc/util/callstack.cpp
@@ -53,6 +53,7 @@ const void * StackEntry::_stopAddr = nullptr;
 size_t
 StackEntry::fillStack(StackEntry *stack, size_t nelems)
 {
+    // GNU extension: Variable-length automatic array
     void * retAddr[nelems];
     int sz = backtrace(retAddr, nelems);
     if ((sz > 0) && (size_t(sz) <= nelems)) {