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authorAbseil Team <absl-team@google.com>2020-02-10T18·18-0800
committerMark Barolak <mbar@google.com>2020-02-10T18·55-0500
commitbf78e977309c4cb946914b456404141ddac1c302 (patch)
tree3d4c99e9bccb4c0cb19a5be2eaf65bb9c81f1c34 /absl/flags/config.h
parentd95d1567165d449e4c213ea31a15cbb112a9865f (diff)
Export of internal Abseil changes
--
803abc2dcad8b2354c988e9bf58dac4a17683832 by Gennadiy Rozental <rogeeff@google.com>:

Avoid warning when RTTI is not enabled.

PiperOrigin-RevId: 294247546

--
5a7b0b4d07d1d6e56fbb0b0ffbf4f8fcab772dbf by Derek Mauro <dmauro@google.com>:

Add a public Abseil FAQ

PiperOrigin-RevId: 294226960

--
6945c4a6df7d7679711fea31aacf4fba6ac7baa1 by Gennadiy Rozental <rogeeff@google.com>:

Re-enable type mismatch check, which works in all the cases including shared libraries.

We will use RTTI in case when our hand written approximation of it reports a type mismatch. This way we can ensure that if a flag is defined in one shared object and referenced in another we do not report spurious errors.

PiperOrigin-RevId: 293905563
GitOrigin-RevId: 803abc2dcad8b2354c988e9bf58dac4a17683832
Change-Id: I1a23776d227ed2734c2e7183323786b7a95c3cc7
Diffstat (limited to 'absl/flags/config.h')
-rw-r--r--absl/flags/config.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/absl/flags/config.h b/absl/flags/config.h
index fbe349611f54..001f8feaf637 100644
--- a/absl/flags/config.h
+++ b/absl/flags/config.h
@@ -56,4 +56,12 @@
 #define ABSL_FLAGS_INTERNAL_ATOMIC_DOUBLE_WORD 1
 #endif
 
+// ABSL_FLAGS_INTERNAL_HAS_RTTI macro is used for selecting if we can use RTTI
+// for flag type identification.
+#ifdef ABSL_FLAGS_INTERNAL_HAS_RTTI
+#error ABSL_FLAGS_INTERNAL_HAS_RTTI cannot be directly set
+#elif !defined(__GNUC__) || defined(__GXX_RTTI)
+#define ABSL_FLAGS_INTERNAL_HAS_RTTI 1
+#endif  // !defined(__GNUC__) || defined(__GXX_RTTI)
+
 #endif  // ABSL_FLAGS_CONFIG_H_