[libunwind] Add support for a single-threaded libunwind build
The EHABI unwinder is thread-agnostic, SJLJ unwinder and the DWARF unwinder have
a couple of pthread dependencies.
This patch makes it possible to build the whole of libunwind for a
single-threaded environment.
Reviewers: compnerd
Differential revision: https://reviews.llvm.org/D24984
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@282575 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/config.h b/src/config.h
index 354e114..8743f53 100644
--- a/src/config.h
+++ b/src/config.h
@@ -85,13 +85,20 @@
} while (0)
#define _LIBUNWIND_LOG(msg, ...) fprintf(stderr, "libunwind: " msg "\n", __VA_ARGS__)
+#if defined(_LIBUNWIND_HAS_NO_THREADS)
+ // only used with pthread calls, not needed for the single-threaded builds
+ #define _LIBUNWIND_LOG_NON_ZERO(x)
+#endif
+
// Macros that define away in non-Debug builds
#ifdef NDEBUG
#define _LIBUNWIND_DEBUG_LOG(msg, ...)
#define _LIBUNWIND_TRACE_API(msg, ...)
#define _LIBUNWIND_TRACING_UNWINDING 0
#define _LIBUNWIND_TRACE_UNWINDING(msg, ...)
- #define _LIBUNWIND_LOG_NON_ZERO(x) x
+ #ifndef _LIBUNWIND_LOG_NON_ZERO
+ #define _LIBUNWIND_LOG_NON_ZERO(x) x
+ #endif
#else
#ifdef __cplusplus
extern "C" {
@@ -102,12 +109,14 @@
}
#endif
#define _LIBUNWIND_DEBUG_LOG(msg, ...) _LIBUNWIND_LOG(msg, __VA_ARGS__)
- #define _LIBUNWIND_LOG_NON_ZERO(x) \
- do { \
- int _err = x; \
- if ( _err != 0 ) \
- _LIBUNWIND_LOG("" #x "=%d in %s", _err, __FUNCTION__); \
- } while (0)
+ #ifndef _LIBUNWIND_LOG_NON_ZERO
+ #define _LIBUNWIND_LOG_NON_ZERO(x) \
+ do { \
+ int _err = x; \
+ if ( _err != 0 ) \
+ _LIBUNWIND_LOG("" #x "=%d in %s", _err, __FUNCTION__); \
+ } while (0)
+ #endif
#define _LIBUNWIND_TRACE_API(msg, ...) \
do { \
if ( logAPIs() ) _LIBUNWIND_LOG(msg, __VA_ARGS__); \
