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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

llvm-svn: 270240
This commit is contained in:
Dimitry Andric 2016-05-20 17:27:22 +00:00
parent be70933d3c
commit c6d924cd06
1 changed files with 9 additions and 2 deletions
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11
clang/lib/Basic/Targets.cpp
View File

@ -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__");