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//===- MultilibBuilder.cpp - MultilibBuilder Implementation -===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Driver/MultilibBuilder.h"
#include "ToolChains/CommonArgs.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
using namespace driver;
/// normalize Segment to "/foo/bar" or "".
static void normalizePathSegment(std::string &Segment) {
StringRef seg = Segment;
// Prune trailing "/" or "./"
while (true) {
StringRef last = llvm::sys::path::filename(seg);
if (last != ".")
break;
seg = llvm::sys::path::parent_path(seg);
}
if (seg.empty() || seg == "/") {
Segment.clear();
return;
}
// Add leading '/'
if (seg.front() != '/') {
Segment = "/" + seg.str();
} else {
Segment = std::string(seg);
}
}
MultilibBuilder::MultilibBuilder(StringRef GCC, StringRef OS, StringRef Include)
: GCCSuffix(GCC), OSSuffix(OS), IncludeSuffix(Include) {
normalizePathSegment(GCCSuffix);
normalizePathSegment(OSSuffix);
normalizePathSegment(IncludeSuffix);
}
MultilibBuilder::MultilibBuilder(StringRef Suffix)
: MultilibBuilder(Suffix, Suffix, Suffix) {}
MultilibBuilder &MultilibBuilder::gccSuffix(StringRef S) {
GCCSuffix = std::string(S);
normalizePathSegment(GCCSuffix);
return *this;
}
MultilibBuilder &MultilibBuilder::osSuffix(StringRef S) {
OSSuffix = std::string(S);
normalizePathSegment(OSSuffix);
return *this;
}
MultilibBuilder &MultilibBuilder::includeSuffix(StringRef S) {
IncludeSuffix = std::string(S);
normalizePathSegment(IncludeSuffix);
return *this;
}
bool MultilibBuilder::isValid() const {
llvm::StringMap<int> FlagSet;
for (unsigned I = 0, N = Flags.size(); I != N; ++I) {
StringRef Flag(Flags[I]);
auto [SI, Inserted] = FlagSet.try_emplace(Flag.substr(1), I);
assert(StringRef(Flag).front() == '-' || StringRef(Flag).front() == '!');
if (!Inserted && Flags[I] != Flags[SI->getValue()])
return false;
}
return true;
}
MultilibBuilder &MultilibBuilder::flag(StringRef Flag, bool Disallow) {
tools::addMultilibFlag(!Disallow, Flag, Flags);
return *this;
}
Multilib MultilibBuilder::makeMultilib() const {
return Multilib(GCCSuffix, OSSuffix, IncludeSuffix, Flags);
}
MultilibSetBuilder &MultilibSetBuilder::Maybe(const MultilibBuilder &M) {
MultilibBuilder Opposite;
// Negate positive flags
for (StringRef Flag : M.flags()) {
if (Flag.front() == '-')
Opposite.flag(Flag, /*Disallow=*/true);
}
return Either(M, Opposite);
}
MultilibSetBuilder &MultilibSetBuilder::Either(const MultilibBuilder &M1,
const MultilibBuilder &M2) {
return Either({M1, M2});
}
MultilibSetBuilder &MultilibSetBuilder::Either(const MultilibBuilder &M1,
const MultilibBuilder &M2,
const MultilibBuilder &M3) {
return Either({M1, M2, M3});
}
MultilibSetBuilder &MultilibSetBuilder::Either(const MultilibBuilder &M1,
const MultilibBuilder &M2,
const MultilibBuilder &M3,
const MultilibBuilder &M4) {
return Either({M1, M2, M3, M4});
}
MultilibSetBuilder &MultilibSetBuilder::Either(const MultilibBuilder &M1,
const MultilibBuilder &M2,
const MultilibBuilder &M3,
const MultilibBuilder &M4,
const MultilibBuilder &M5) {
return Either({M1, M2, M3, M4, M5});
}
static MultilibBuilder compose(const MultilibBuilder &Base,
const MultilibBuilder &New) {
SmallString<128> GCCSuffix;
llvm::sys::path::append(GCCSuffix, "/", Base.gccSuffix(), New.gccSuffix());
SmallString<128> OSSuffix;
llvm::sys::path::append(OSSuffix, "/", Base.osSuffix(), New.osSuffix());
SmallString<128> IncludeSuffix;
llvm::sys::path::append(IncludeSuffix, "/", Base.includeSuffix(),
New.includeSuffix());
MultilibBuilder Composed(GCCSuffix, OSSuffix, IncludeSuffix);
MultilibBuilder::flags_list &Flags = Composed.flags();
Flags.insert(Flags.end(), Base.flags().begin(), Base.flags().end());
Flags.insert(Flags.end(), New.flags().begin(), New.flags().end());
return Composed;
}
MultilibSetBuilder &
MultilibSetBuilder::Either(ArrayRef<MultilibBuilder> MultilibSegments) {
multilib_list Composed;
if (Multilibs.empty())
Multilibs.insert(Multilibs.end(), MultilibSegments.begin(),
MultilibSegments.end());
else {
for (const auto &New : MultilibSegments) {
for (const auto &Base : Multilibs) {
MultilibBuilder MO = compose(Base, New);
if (MO.isValid())
Composed.push_back(MO);
}
}
Multilibs = Composed;
}
return *this;
}
MultilibSetBuilder &MultilibSetBuilder::FilterOut(const char *Regex) {
llvm::Regex R(Regex);
#ifndef NDEBUG
std::string Error;
if (!R.isValid(Error)) {
llvm::errs() << Error;
llvm_unreachable("Invalid regex!");
}
#endif
llvm::erase_if(Multilibs, [&R](const MultilibBuilder &M) {
return R.match(M.gccSuffix());
});
return *this;
}
MultilibSet MultilibSetBuilder::makeMultilibSet() const {
MultilibSet Result;
for (const auto &M : Multilibs) {
Result.push_back(M.makeMultilib());
}
return Result;
}
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