Support for QNX (#1147)

absl/base/config.h

@@ -414,7 +414,8 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
     defined(_AIX) || defined(__ros__) || defined(__native_client__) ||    \
     defined(__asmjs__) || defined(__wasm__) || defined(__Fuchsia__) ||    \
     defined(__sun) || defined(__ASYLO__) || defined(__myriad2__) ||       \
-    defined(__HAIKU__) || defined(__OpenBSD__) || defined(__NetBSD__)
+    defined(__HAIKU__) || defined(__OpenBSD__) || defined(__NetBSD__) ||  \
+    defined(__QNX__)
 #define ABSL_HAVE_MMAP 1
 #endif
 

absl/debugging/failure_signal_handler.cc

@@ -52,7 +52,7 @@
 #define ABSL_HAVE_SIGACTION
 // Apple WatchOS and TVOS don't allow sigaltstack
 #if !(defined(TARGET_OS_WATCH) && TARGET_OS_WATCH) && \
-    !(defined(TARGET_OS_TV) && TARGET_OS_TV)
+    !(defined(TARGET_OS_TV) && TARGET_OS_TV) && !defined(__QNX__)
 #define ABSL_HAVE_SIGALTSTACK
 #endif
 #endif

absl/debugging/internal/elf_mem_image.h

@@ -31,7 +31,7 @@
 #error ABSL_HAVE_ELF_MEM_IMAGE cannot be directly set
 #endif
 
-#if defined(__ELF__) && !defined(__OpenBSD__) && \
+#if defined(__ELF__) && !defined(__OpenBSD__) && !defined(__QNX__) &&  \
     !defined(__native_client__) && !defined(__asmjs__) && !defined(__wasm__)
 #define ABSL_HAVE_ELF_MEM_IMAGE 1
 #endif