From: Dimitry Andric <dimitry@andric.com>
Date: Fri, 20 May 2016 17:27:22 +0000 (+0000)
Subject: Make __FreeBSD_cc_version predefined macro configurable at build time
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e36a6725b91faf63bad55b0a212defedcf22448a;p=clang

Make __FreeBSD_cc_version predefined macro configurable at build time

The `FreeBSDTargetInfo` class has always set the `__FreeBSD_cc_version`
predefined macro to a rather static value, calculated from the major OS
version.

In the FreeBSD base system, we will start incrementing the value of this
macro whenever we make any signifant change to clang, so we need a way
to configure the macro's value at build time.

Use `FREEBSD_CC_VERSION` for this, which we can define in the FreeBSD
build system using either the `-D` command line option, or an include
file.  Stock builds will keep the earlier value.

Differential Revision: http://reviews.llvm.org/D20037


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@270240 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 2a01807100..cd9c51adab 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -308,6 +308,10 @@ public:
   }
 };
 
+#ifndef FREEBSD_CC_VERSION
+#define FREEBSD_CC_VERSION 0U
+#endif
+
 // FreeBSD Target
 template<typename Target>
 class FreeBSDTargetInfo : public OSTargetInfo<Target> {
@@ -318,10 +322,13 @@ protected:
 
     unsigned Release = Triple.getOSMajorVersion();
     if (Release == 0U)
-      Release = 8;
+      Release = 8U;
+    unsigned CCVersion = FREEBSD_CC_VERSION;
+    if (CCVersion == 0U)
+      CCVersion = Release * 100000U + 1U;
 
     Builder.defineMacro("__FreeBSD__", Twine(Release));
-    Builder.defineMacro("__FreeBSD_cc_version", Twine(Release * 100000U + 1U));
+    Builder.defineMacro("__FreeBSD_cc_version", Twine(CCVersion));
     Builder.defineMacro("__KPRINTF_ATTRIBUTE__");
     DefineStd(Builder, "unix", Opts);
     Builder.defineMacro("__ELF__");