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[clang-cl] Implement support for /std 

/std: supports two arguments, c++14 and c++latest.  Currently, c++latest
maps to c++1z but this might change down the road.

llvm-svn: 273841
This commit is contained in:
David Majnemer 2016-06-27 02:32:12 +00:00
parent e3c72c1c85
commit 093012bf6e
3 changed files with 27 additions and 4 deletions
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2
clang/include/clang/Driver/CLCompatOptions.td
View File

@ -120,6 +120,8 @@ def _SLASH_Qvec_ : CLFlag<"Qvec-">,
def _SLASH_showIncludes : CLFlag<"showIncludes">,
HelpText<"Print info about included files to stderr">,
Alias<show_includes>;
def _SLASH_std : CLCompileJoined<"std:">,
HelpText<"Language standard to compile for">;
def _SLASH_U : CLJoinedOrSeparate<"U">, HelpText<"Undefine macro">,
MetaVarName<"<macro>">, Alias<U>;
def _SLASH_W0 : CLFlag<"W0">, HelpText<"Disable all warnings">, Alias<w>;

23
clang/lib/Driver/Tools.cpp
View File

@ -5362,10 +5362,25 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
bool IsMSVC2015Compatible = MSVT.getMajor() >= 19;
if (ImplyVCPPCXXVer) {
if (IsMSVC2015Compatible)
CmdArgs.push_back("-std=c++14");
else
CmdArgs.push_back("-std=c++11");
StringRef LanguageStandard;
if (const Arg *StdArg = Args.getLastArg(options::OPT__SLASH_std)) {
LanguageStandard = llvm::StringSwitch<StringRef>(StdArg->getValue())
.Case("c++14", "-std=c++14")
.Case("c++latest", "-std=c++1z")
.Default("");
if (LanguageStandard.empty())
D.Diag(clang::diag::warn_drv_unused_argument)
<< StdArg->getAsString(Args);
}
if (LanguageStandard.empty()) {
if (IsMSVC2015Compatible)
LanguageStandard = "-std=c++14";
else
LanguageStandard = "-std=c++11";
}
CmdArgs.push_back(LanguageStandard.data());
}
// -fno-borland-extensions is default.

6
clang/test/Driver/cl-options.c
View File

@ -452,6 +452,12 @@
// RUN: %clang_cl -fmsc-version=1900 -TP -### -- %s 2>&1 | FileCheck -check-prefix=CXX14 %s
// CXX14: -std=c++14
// RUN: %clang_cl -fmsc-version=1900 -TP -std:c++14 -### -- %s 2>&1 | FileCheck -check-prefix=STDCXX14 %s
// STDCXX14: -std=c++14
// RUN: %clang_cl -fmsc-version=1900 -TP -std:c++latest -### -- %s 2>&1 | FileCheck -check-prefix=STDCXXLATEST %s
// STDCXXLATEST: -std=c++1z
// RUN: env CL="/Gy" %clang_cl -### -- %s 2>&1 | FileCheck -check-prefix=ENV-CL %s
// ENV-CL: "-ffunction-sections"