4 files changed, 7 insertions, 8 deletions
diff --git a/absl/strings/internal/str_format/bind.h b/absl/strings/internal/str_format/bind.h
index 7f46035113bb..dafcd6102f91 100644
--- a/absl/strings/internal/str_format/bind.h
+++ b/absl/strings/internal/str_format/bind.h
@@ -73,7 +73,7 @@ class FormatSpecTemplate
   using Base = typename MakeDependent<UntypedFormatSpec, Args...>::type;
 
  public:
-#if ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
+#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
   // Honeypot overload for when the std::string is not constexpr.
   // We use the 'unavailable' attribute to give a better compiler error than
diff --git a/absl/strings/internal/str_format/checker.h b/absl/strings/internal/str_format/checker.h
index 8b594f2d5cc6..04a888275185 100644
--- a/absl/strings/internal/str_format/checker.h
+++ b/absl/strings/internal/str_format/checker.h
@@ -1,17 +1,16 @@
 #ifndef ABSL_STRINGS_INTERNAL_STR_FORMAT_CHECKER_H_
 #define ABSL_STRINGS_INTERNAL_STR_FORMAT_CHECKER_H_
 
+#include "absl/base/attributes.h"
 #include "absl/strings/internal/str_format/arg.h"
 #include "absl/strings/internal/str_format/extension.h"
 
 // Compile time check support for entry points.
 
 #ifndef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
-#if defined(__clang__) && !defined(__native_client__)
-#if __has_attribute(enable_if)
+#if ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__)
 #define ABSL_INTERNAL_ENABLE_FORMAT_CHECKER 1
-#endif  // __has_attribute(enable_if)
-#endif  // defined(__clang__) && !defined(__native_client__)
+#endif  // ABSL_HAVE_ATTRIBUTE(enable_if) && !defined(__native_client__)
 #endif  // ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
 namespace absl {
@@ -31,7 +30,7 @@ constexpr Conv ArgumentToConv() {
       std::declval<FormatSinkImpl*>()))::kConv;
 }
 
-#if ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
+#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
 constexpr bool ContainsChar(const char* chars, char c) {
   return *chars == c || (*chars && ContainsChar(chars + 1, c));
diff --git a/absl/strings/internal/str_format/checker_test.cc b/absl/strings/internal/str_format/checker_test.cc
index c1d8c769ef7d..7aa194a7fa90 100644
--- a/absl/strings/internal/str_format/checker_test.cc
+++ b/absl/strings/internal/str_format/checker_test.cc
@@ -35,7 +35,7 @@ TEST(StrFormatChecker, ArgumentToConv) {
   EXPECT_EQ(ConvToString(conv), "p");
 }
 
-#if ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
+#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
 
 struct Case {
   bool result;
diff --git a/absl/strings/internal/str_format/parser.h b/absl/strings/internal/str_format/parser.h
index b7614a09fa4e..4b441f7193a5 100644
--- a/absl/strings/internal/str_format/parser.h
+++ b/absl/strings/internal/str_format/parser.h
@@ -274,7 +274,7 @@ template <str_format_internal::Conv... C>
 class ExtendedParsedFormat : public str_format_internal::ParsedFormatBase {
  public:
   explicit ExtendedParsedFormat(string_view format)
-#if ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
+#ifdef ABSL_INTERNAL_ENABLE_FORMAT_CHECKER
       __attribute__((
           enable_if(str_format_internal::EnsureConstexpr(format),
                     "Format std::string is not constexpr."),