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darwin/driver: Support using SDKROOT to define the default for -isysroot.

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- The SDKROOT environment variable is the de facto way to set the default SDK
   for a number of tools, join forces with them.

llvm-svn: 162116
This commit is contained in:
Daniel Dunbar 2012-08-17 18:43:50 +00:00
parent d394c8a83e
commit 455a0496b2
2 changed files with 36 additions and 0 deletions
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14
clang/lib/Driver/ToolChains.cpp
View File

@ -442,6 +442,20 @@ static bool GetVersionFromSimulatorDefine(StringRef define,
void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
const OptTable &Opts = getDriver().getOpts();
// Support allowing the SDKROOT environment variable used by xcrun and other
// Xcode tools to define the default sysroot, by making it the default for
// isysroot.
if (!Args.hasArg(options::OPT_isysroot)) {
if (char *env = ::getenv("SDKROOT")) {
// We only use this value as the default if it is an absolute path and
// exists.
if (llvm::sys::path::is_absolute(env) && llvm::sys::fs::exists(env)) {
Args.append(Args.MakeSeparateArg(
0, Opts.getOption(options::OPT_isysroot), env));
}
}
}
Arg *OSXVersion = Args.getLastArg(options::OPT_mmacosx_version_min_EQ);
Arg *iOSVersion = Args.getLastArg(options::OPT_miphoneos_version_min_EQ);
Arg *iOSSimVersion = Args.getLastArg(

22
clang/test/Driver/darwin-sdkroot.c Normal file
View File

@ -0,0 +1,22 @@
// Check that SDKROOT is used to define the default for -isysroot on Darwin.
//
// RUN: rm -rf %t.tmpdir
// RUN: mkdir -p %t.tmpdir
// RUN: env SDKROOT=%t.tmpdir %clang -target x86_64-apple-darwin10 \
// RUN: -c %s -### 2> %t.log
// RUN: FileCheck --check-prefix=CHECK-BASIC < %t.log %s
//
// CHECK-BASIC: clang
// CHECK-BASIC: "-cc1"
// CHECK-BASIC: "-isysroot" "{{.*tmpdir}}"
// Check that we don't use SDKROOT as the default if it is not a valid path.
// RUN: rm -rf %t.nonpath
// RUN: env SDKROOT=%t.nonpath %clang -target x86_64-apple-darwin10 \
// RUN: -c %s -### 2> %t.log
// RUN: FileCheck --check-prefix=CHECK-NONPATH < %t.log %s
//
// CHECK-NONPATH: clang
// CHECK-NONPATH: "-cc1"
// CHECK-NONPATH-NOT: "-isysroot"