From 2bf78b4d6c5ec84e82b9e5cd4a394975f554cce0 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger <joerg@bec.de>
Date: Fri, 30 Sep 2016 20:04:24 +0000
Subject: [PATCH] Convert ENABLE_BACKTRACES into a 0/1 definition.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282918 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Config/config.h.cmake |  4 ++--
 lib/Support/PrettyStackTrace.cpp   | 16 ++++++++--------
 lib/Support/Unix/Signals.inc       |  8 ++++----
 3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index bac98dd8d51..eafab762dae 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -7,8 +7,8 @@
 /* Bug report URL. */
 #define BUG_REPORT_URL "${BUG_REPORT_URL}"
 
-/* Define if you want backtraces on crash */
-#cmakedefine ENABLE_BACKTRACES
+/* Define to 1 to enable backtraces, and to 0 otherwise. */
+#cmakedefine01 ENABLE_BACKTRACES
 
 /* Define to enable crash overrides */
 #cmakedefine ENABLE_CRASH_OVERRIDES
diff --git a/lib/Support/PrettyStackTrace.cpp b/lib/Support/PrettyStackTrace.cpp
index ebad67bb8dc..845745ced69 100644
--- a/lib/Support/PrettyStackTrace.cpp
+++ b/lib/Support/PrettyStackTrace.cpp
@@ -32,7 +32,7 @@ using namespace llvm;
 // If backtrace support is not enabled, compile out support for pretty stack
 // traces.  This has the secondary effect of not requiring thread local storage
 // when backtrace support is disabled.
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
 
 // We need a thread local pointer to manage the stack of our stack trace
 // objects, but we *really* cannot tolerate destructors running and do not want
@@ -122,11 +122,11 @@ static void CrashHandler(void *) {
 #endif
 }
 
-// defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+// defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
 #endif
 
 PrettyStackTraceEntry::PrettyStackTraceEntry() {
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
   // Link ourselves.
   NextEntry = PrettyStackTraceHead;
   PrettyStackTraceHead = this;
@@ -134,7 +134,7 @@ PrettyStackTraceEntry::PrettyStackTraceEntry() {
 }
 
 PrettyStackTraceEntry::~PrettyStackTraceEntry() {
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
   assert(PrettyStackTraceHead == this &&
          "Pretty stack trace entry destruction is out of order");
   PrettyStackTraceHead = NextEntry;
@@ -153,7 +153,7 @@ void PrettyStackTraceProgram::print(raw_ostream &OS) const {
   OS << '\n';
 }
 
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
 static bool RegisterCrashPrinter() {
   sys::AddSignalHandler(CrashHandler, nullptr);
   return false;
@@ -161,7 +161,7 @@ static bool RegisterCrashPrinter() {
 #endif
 
 void llvm::EnablePrettyStackTrace() {
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
   // The first time this is called, we register the crash printer.
   static bool HandlerRegistered = RegisterCrashPrinter();
   (void)HandlerRegistered;
@@ -169,7 +169,7 @@ void llvm::EnablePrettyStackTrace() {
 }
 
 const void *llvm::SavePrettyStackState() {
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
   return PrettyStackTraceHead;
 #else
   return nullptr;
@@ -177,7 +177,7 @@ const void *llvm::SavePrettyStackState() {
 }
 
 void llvm::RestorePrettyStackState(const void *Top) {
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES)
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES
   PrettyStackTraceHead =
       static_cast<PrettyStackTraceEntry *>(const_cast<void *>(Top));
 #endif
diff --git a/lib/Support/Unix/Signals.inc b/lib/Support/Unix/Signals.inc
index 3d921fd2e87..d709d2b133d 100644
--- a/lib/Support/Unix/Signals.inc
+++ b/lib/Support/Unix/Signals.inc
@@ -298,7 +298,7 @@ void llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
   RegisterHandlers();
 }
 
-#if defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES) && HAVE_LINK_H &&    \
+#if defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES && HAVE_LINK_H &&    \
     (defined(__linux__) || defined(__FreeBSD__) ||                             \
      defined(__FreeBSD_kernel__) || defined(__NetBSD__))
 struct DlIteratePhdrData {
@@ -353,9 +353,9 @@ static bool findModulesAndOffsets(void **StackTrace, int Depth,
                                   StringSaver &StrPool) {
   return false;
 }
-#endif // defined(HAVE_BACKTRACE) && defined(ENABLE_BACKTRACES) && ...
+#endif // defined(HAVE_BACKTRACE) && ENABLE_BACKTRACES && ...
 
-#if defined(ENABLE_BACKTRACES) && defined(HAVE__UNWIND_BACKTRACE)
+#if ENABLE_BACKTRACES && defined(HAVE__UNWIND_BACKTRACE)
 static int unwindBacktrace(void **StackTrace, int MaxEntries) {
   if (MaxEntries < 0)
     return 0;
@@ -393,7 +393,7 @@ static int unwindBacktrace(void **StackTrace, int MaxEntries) {
 // On glibc systems we have the 'backtrace' function, which works nicely, but
 // doesn't demangle symbols.
 void llvm::sys::PrintStackTrace(raw_ostream &OS) {
-#if defined(ENABLE_BACKTRACES)
+#if ENABLE_BACKTRACES
   static void *StackTrace[256];
   int depth = 0;
 #if defined(HAVE_BACKTRACE)
-- 
2.11.0