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 2a01807..cd9c51a 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -308,6 +308,10 @@
}
};
+#ifndef FREEBSD_CC_VERSION
+#define FREEBSD_CC_VERSION 0U
+#endif
+
// FreeBSD Target
template<typename Target>
class FreeBSDTargetInfo : public OSTargetInfo<Target> {
@@ -318,10 +322,13 @@
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__");
