Prepare code to be ready for abseil-cpp > 20140116

Right now, we can't switch yet to be compatible with all bazel
versions (unfortunately, newer abseil-cpp require bazel 7), but
at least have the code ready in case someone compiles it in
such environment.

Author: hzeller

verible/common/formatting/layout-optimizer.cc

@@ -40,6 +40,10 @@
 #include "verible/common/util/tree-operations.h"
 #include "verible/common/util/value-saver.h"
 
+#if ABSL_LTS_RELEASE_VERSION > 20240200
+#include "absl/log/vlog_is_on.h"
+#endif
+
 namespace verible {
 
 void OptimizeTokenPartitionTree(const BasicFormatStyle &style,

verible/common/lsp/lsp-file-utils.cc

@@ -56,7 +56,12 @@ std::string DecodeURI(std::string_view uri) {
       pos++;
       if (pos + 2 <= uri.size() && std::isxdigit(uri[pos]) &&
           std::isxdigit(uri[pos + 1])) {
-        std::string hex = absl::HexStringToBytes(uri.substr(pos, 2));
+        std::string hex;
+#if ABSL_LTS_RELEASE_VERSION > 20240200
+        if (!absl::HexStringToBytes(uri.substr(pos, 2), &hex)) break;
+#else
+        hex = absl::HexStringToBytes(uri.substr(pos, 2));
+#endif
         absl::StrAppend(&result, hex.length() == 1 ? hex : uri.substr(pos, 2));
         pos += 2;
       } else {

verible/verilog/analysis/verilog-analyzer.cc

@@ -48,6 +48,10 @@
 #include "verible/verilog/parser/verilog-token-enum.h"
 #include "verible/verilog/preprocessor/verilog-preprocess.h"
 
+#if ABSL_LTS_RELEASE_VERSION > 20240200
+#include "absl/log/vlog_is_on.h"
+#endif
+
 namespace verilog {
 
 using verible::TokenInfo;

verible/verilog/analysis/verilog-linter.cc

@@ -55,6 +55,10 @@
 #include "verible/verilog/parser/verilog-token-classifications.h"
 #include "verible/verilog/parser/verilog-token-enum.h"
 
+#if ABSL_LTS_RELEASE_VERSION > 20240200
+#include "absl/log/vlog_is_on.h"
+#endif
+
 // TODO(hzeller): make --rules repeatable and cumulative
 
 ABSL_FLAG(verilog::RuleBundle, rules, {},

verible/verilog/tools/ls/symbol-table-handler.cc

@@ -49,6 +49,10 @@
 #include "verible/verilog/tools/ls/lsp-conversion.h"
 #include "verible/verilog/tools/ls/lsp-parse-buffer.h"
 
+#if ABSL_LTS_RELEASE_VERSION > 20240200
+#include "absl/log/vlog_is_on.h"
+#endif
+
 ABSL_FLAG(std::string, file_list_path, "verible.filelist",
           "Name of the file with Verible FileList for the project");