From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Thu, 18 Aug 2016 18:22:22 +0000 (+0000)
Subject: Use __has_include rather than a configure-time macro to determine if
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ca10d2e64d9630bb93507ac416c3f176d0df8a2b;p=clang

Use __has_include rather than a configure-time macro to determine if
<sys/resource.h> is available. This should fix out-of-tree builds, at the cost
of not providing the higher rlimits to stage 1 clang when built with an old
host compiler not implementing this feature yet (bootstrap builds should be
fine, though).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@279112 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/tools/driver/cc1_main.cpp b/tools/driver/cc1_main.cpp
index b44108e8ad..fff6ffe44c 100644
--- a/tools/driver/cc1_main.cpp
+++ b/tools/driver/cc1_main.cpp
@@ -37,9 +37,14 @@
 #include "llvm/Support/Timer.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cstdio>
-#if HAVE_SYS_RESOURCE_H
+
+#ifdef __has_include
+#if __has_include(<sys/resource.h>)
+#define HAVE_RLIMITS
 #include <sys/resource.h>
 #endif
+#endif
+
 using namespace clang;
 using namespace llvm::opt;
 
@@ -69,7 +74,7 @@ void initializePollyPasses(llvm::PassRegistry &Registry);
 }
 #endif
 
-#if HAVE_SYS_RESOURCE_H && HAVE_GETRLIMIT && HAVE_SETRLIMIT
+#ifdef HAVE_RLIMITS
 // The amount of stack we think is "sufficient". If less than this much is
 // available, we may be unable to reach our template instantiation depth
 // limit and other similar limits.