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llvm / llvm-project / clang / refs/heads/main / . / lib / Driver / ToolChains / AVR.cpp
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//===--- AVR.cpp - AVR ToolChain Implementations ----------------*- C++ -*-===//
//
// 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 "AVR.h"
#include "CommonArgs.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/InputInfo.h"
#include "clang/Driver/Options.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/TargetParser/SubtargetFeature.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
namespace {
// NOTE: This list has been synchronized with gcc-avr 7.3.0 and avr-libc 2.0.0.
constexpr struct {
StringRef Name;
StringRef SubPath;
StringRef Family;
unsigned DataAddr;
} MCUInfo[] = {
{"at90s1200", "", "avr1", 0},
{"attiny11", "", "avr1", 0},
{"attiny12", "", "avr1", 0},
{"attiny15", "", "avr1", 0},
{"attiny28", "", "avr1", 0},
{"at90s2313", "tiny-stack", "avr2", 0x800060},
{"at90s2323", "tiny-stack", "avr2", 0x800060},
{"at90s2333", "tiny-stack", "avr2", 0x800060},
{"at90s2343", "tiny-stack", "avr2", 0x800060},
{"at90s4433", "tiny-stack", "avr2", 0x800060},
{"attiny22", "tiny-stack", "avr2", 0x800060},
{"attiny26", "tiny-stack", "avr2", 0x800060},
{"at90s4414", "", "avr2", 0x800060},
{"at90s4434", "", "avr2", 0x800060},
{"at90s8515", "", "avr2", 0x800060},
{"at90c8534", "", "avr2", 0x800060},
{"at90s8535", "", "avr2", 0x800060},
{"attiny13", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny13a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny2313", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny2313a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny24", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny24a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny25", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny261", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny261a", "avr25/tiny-stack", "avr25", 0x800060},
{"at86rf401", "avr25", "avr25", 0x800060},
{"ata5272", "avr25", "avr25", 0x800100},
{"ata6616c", "avr25", "avr25", 0x800100},
{"attiny4313", "avr25", "avr25", 0x800060},
{"attiny44", "avr25", "avr25", 0x800060},
{"attiny44a", "avr25", "avr25", 0x800060},
{"attiny84", "avr25", "avr25", 0x800060},
{"attiny84a", "avr25", "avr25", 0x800060},
{"attiny45", "avr25", "avr25", 0x800060},
{"attiny85", "avr25", "avr25", 0x800060},
{"attiny441", "avr25", "avr25", 0x800100},
{"attiny461", "avr25", "avr25", 0x800060},
{"attiny461a", "avr25", "avr25", 0x800060},
{"attiny841", "avr25", "avr25", 0x800100},
{"attiny861", "avr25", "avr25", 0x800060},
{"attiny861a", "avr25", "avr25", 0x800060},
{"attiny87", "avr25", "avr25", 0x800100},
{"attiny43u", "avr25", "avr25", 0x800060},
{"attiny48", "avr25", "avr25", 0x800100},
{"attiny88", "avr25", "avr25", 0x800100},
{"attiny828", "avr25", "avr25", 0x800100},
{"at43usb355", "avr3", "avr3", 0x800100},
{"at76c711", "avr3", "avr3", 0x800060},
{"atmega103", "avr31", "avr31", 0x800060},
{"at43usb320", "avr31", "avr31", 0x800060},
{"attiny167", "avr35", "avr35", 0x800100},
{"at90usb82", "avr35", "avr35", 0x800100},
{"at90usb162", "avr35", "avr35", 0x800100},
{"ata5505", "avr35", "avr35", 0x800100},
{"ata6617c", "avr35", "avr35", 0x800100},
{"ata664251", "avr35", "avr35", 0x800100},
{"atmega8u2", "avr35", "avr35", 0x800100},
{"atmega16u2", "avr35", "avr35", 0x800100},
{"atmega32u2", "avr35", "avr35", 0x800100},
{"attiny1634", "avr35", "avr35", 0x800100},
{"atmega8", "avr4", "avr4", 0x800060},
{"ata6289", "avr4", "avr4", 0x800100},
{"atmega8a", "avr4", "avr4", 0x800060},
{"ata6285", "avr4", "avr4", 0x800100},
{"ata6286", "avr4", "avr4", 0x800100},
{"ata6612c", "avr4", "avr4", 0x800100},
{"atmega48", "avr4", "avr4", 0x800100},
{"atmega48a", "avr4", "avr4", 0x800100},
{"atmega48pa", "avr4", "avr4", 0x800100},
{"atmega48pb", "avr4", "avr4", 0x800100},
{"atmega48p", "avr4", "avr4", 0x800100},
{"atmega88", "avr4", "avr4", 0x800100},
{"atmega88a", "avr4", "avr4", 0x800100},
{"atmega88p", "avr4", "avr4", 0x800100},
{"atmega88pa", "avr4", "avr4", 0x800100},
{"atmega88pb", "avr4", "avr4", 0x800100},
{"atmega8515", "avr4", "avr4", 0x800060},
{"atmega8535", "avr4", "avr4", 0x800060},
{"atmega8hva", "avr4", "avr4", 0x800100},
{"at90pwm1", "avr4", "avr4", 0x800100},
{"at90pwm2", "avr4", "avr4", 0x800100},
{"at90pwm2b", "avr4", "avr4", 0x800100},
{"at90pwm3", "avr4", "avr4", 0x800100},
{"at90pwm3b", "avr4", "avr4", 0x800100},
{"at90pwm81", "avr4", "avr4", 0x800100},
{"ata5702m322", "avr5", "avr5", 0x800200},
{"ata5782", "avr5", "avr5", 0x800200},
{"ata5790", "avr5", "avr5", 0x800100},
{"ata5790n", "avr5", "avr5", 0x800100},
{"ata5791", "avr5", "avr5", 0x800100},
{"ata5795", "avr5", "avr5", 0x800100},
{"ata5831", "avr5", "avr5", 0x800200},
{"ata6613c", "avr5", "avr5", 0x800100},
{"ata6614q", "avr5", "avr5", 0x800100},
{"ata8210", "avr5", "avr5", 0x800200},
{"ata8510", "avr5", "avr5", 0x800200},
{"atmega16", "avr5", "avr5", 0x800060},
{"atmega16a", "avr5", "avr5", 0x800060},
{"atmega161", "avr5", "avr5", 0x800060},
{"atmega162", "avr5", "avr5", 0x800100},
{"atmega163", "avr5", "avr5", 0x800060},
{"atmega164a", "avr5", "avr5", 0x800100},
{"atmega164p", "avr5", "avr5", 0x800100},
{"atmega164pa", "avr5", "avr5", 0x800100},
{"atmega165", "avr5", "avr5", 0x800100},
{"atmega165a", "avr5", "avr5", 0x800100},
{"atmega165p", "avr5", "avr5", 0x800100},
{"atmega165pa", "avr5", "avr5", 0x800100},
{"atmega168", "avr5", "avr5", 0x800100},
{"atmega168a", "avr5", "avr5", 0x800100},
{"atmega168p", "avr5", "avr5", 0x800100},
{"atmega168pa", "avr5", "avr5", 0x800100},
{"atmega168pb", "avr5", "avr5", 0x800100},
{"atmega169", "avr5", "avr5", 0x800100},
{"atmega169a", "avr5", "avr5", 0x800100},
{"atmega169p", "avr5", "avr5", 0x800100},
{"atmega169pa", "avr5", "avr5", 0x800100},
{"atmega32", "avr5", "avr5", 0x800060},
{"atmega32a", "avr5", "avr5", 0x800060},
{"atmega323", "avr5", "avr5", 0x800060},
{"atmega324a", "avr5", "avr5", 0x800100},
{"atmega324p", "avr5", "avr5", 0x800100},
{"atmega324pa", "avr5", "avr5", 0x800100},
{"atmega324pb", "avr5", "avr5", 0x800100},
{"atmega325", "avr5", "avr5", 0x800100},
{"atmega325a", "avr5", "avr5", 0x800100},
{"atmega325p", "avr5", "avr5", 0x800100},
{"atmega325pa", "avr5", "avr5", 0x800100},
{"atmega3250", "avr5", "avr5", 0x800100},
{"atmega3250a", "avr5", "avr5", 0x800100},
{"atmega3250p", "avr5", "avr5", 0x800100},
{"atmega3250pa", "avr5", "avr5", 0x800100},
{"atmega328", "avr5", "avr5", 0x800100},
{"atmega328p", "avr5", "avr5", 0x800100},
{"atmega328pb", "avr5", "avr5", 0x800100},
{"atmega329", "avr5", "avr5", 0x800100},
{"atmega329a", "avr5", "avr5", 0x800100},
{"atmega329p", "avr5", "avr5", 0x800100},
{"atmega329pa", "avr5", "avr5", 0x800100},
{"atmega3290", "avr5", "avr5", 0x800100},
{"atmega3290a", "avr5", "avr5", 0x800100},
{"atmega3290p", "avr5", "avr5", 0x800100},
{"atmega3290pa", "avr5", "avr5", 0x800100},
{"atmega406", "avr5", "avr5", 0x800100},
{"atmega64", "avr5", "avr5", 0x800100},
{"atmega64a", "avr5", "avr5", 0x800100},
{"atmega640", "avr5", "avr5", 0x800200},
{"atmega644", "avr5", "avr5", 0x800100},
{"atmega644a", "avr5", "avr5", 0x800100},
{"atmega644p", "avr5", "avr5", 0x800100},
{"atmega644pa", "avr5", "avr5", 0x800100},
{"atmega645", "avr5", "avr5", 0x800100},
{"atmega645a", "avr5", "avr5", 0x800100},
{"atmega645p", "avr5", "avr5", 0x800100},
{"atmega649", "avr5", "avr5", 0x800100},
{"atmega649a", "avr5", "avr5", 0x800100},
{"atmega649p", "avr5", "avr5", 0x800100},
{"atmega6450", "avr5", "avr5", 0x800100},
{"atmega6450a", "avr5", "avr5", 0x800100},
{"atmega6450p", "avr5", "avr5", 0x800100},
{"atmega6490", "avr5", "avr5", 0x800100},
{"atmega6490a", "avr5", "avr5", 0x800100},
{"atmega6490p", "avr5", "avr5", 0x800100},
{"atmega64rfr2", "avr5", "avr5", 0x800200},
{"atmega644rfr2", "avr5", "avr5", 0x800200},
{"atmega16hva", "avr5", "avr5", 0x800100},
{"atmega16hva2", "avr5", "avr5", 0x800100},
{"atmega16hvb", "avr5", "avr5", 0x800100},
{"atmega16hvbrevb", "avr5", "avr5", 0x800100},
{"atmega32hvb", "avr5", "avr5", 0x800100},
{"atmega32hvbrevb", "avr5", "avr5", 0x800100},
{"atmega64hve", "avr5", "avr5", 0x800100},
{"atmega64hve2", "avr5", "avr5", 0x800100},
{"at90can32", "avr5", "avr5", 0x800100},
{"at90can64", "avr5", "avr5", 0x800100},
{"at90pwm161", "avr5", "avr5", 0x800100},
{"at90pwm216", "avr5", "avr5", 0x800100},
{"at90pwm316", "avr5", "avr5", 0x800100},
{"atmega32c1", "avr5", "avr5", 0x800100},
{"atmega64c1", "avr5", "avr5", 0x800100},
{"atmega16m1", "avr5", "avr5", 0x800100},
{"atmega32m1", "avr5", "avr5", 0x800100},
{"atmega64m1", "avr5", "avr5", 0x800100},
{"atmega16u4", "avr5", "avr5", 0x800100},
{"atmega32u4", "avr5", "avr5", 0x800100},
{"atmega32u6", "avr5", "avr5", 0x800100},
{"at90usb646", "avr5", "avr5", 0x800100},
{"at90usb647", "avr5", "avr5", 0x800100},
{"at90scr100", "avr5", "avr5", 0x800100},
{"at94k", "avr5", "avr5", 0x800060},
{"m3000", "avr5", "avr5", 0x800060},
{"atmega128", "avr51", "avr51", 0x800100},
{"atmega128a", "avr51", "avr51", 0x800100},
{"atmega1280", "avr51", "avr51", 0x800200},
{"atmega1281", "avr51", "avr51", 0x800200},
{"atmega1284", "avr51", "avr51", 0x800100},
{"atmega1284p", "avr51", "avr51", 0x800100},
{"atmega128rfa1", "avr51", "avr51", 0x800200},
{"atmega128rfr2", "avr51", "avr51", 0x800200},
{"atmega1284rfr2", "avr51", "avr51", 0x800200},
{"at90can128", "avr51", "avr51", 0x800200},
{"at90usb1286", "avr51", "avr51", 0x800200},
{"at90usb1287", "avr51", "avr51", 0x800200},
{"atmega2560", "avr6", "avr6", 0x800200},
{"atmega2561", "avr6", "avr6", 0x800200},
{"atmega256rfr2", "avr6", "avr6", 0x800200},
{"atmega2564rfr2", "avr6", "avr6", 0x800200},
{"attiny4", "avrtiny", "avrtiny", 0x800040},
{"attiny5", "avrtiny", "avrtiny", 0x800040},
{"attiny9", "avrtiny", "avrtiny", 0x800040},
{"attiny10", "avrtiny", "avrtiny", 0x800040},
{"attiny20", "avrtiny", "avrtiny", 0x800040},
{"attiny40", "avrtiny", "avrtiny", 0x800040},
{"attiny102", "avrtiny", "avrtiny", 0x800040},
{"attiny104", "avrtiny", "avrtiny", 0x800040},
{"atxmega16a4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16a4u", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16c4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16d4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32a4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32a4u", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32c3", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32c4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32d3", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32d4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega8e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega64a3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a3u", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a4u", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64b1", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64b3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64c3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64d3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64d4", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a1", "avrxmega5", "avrxmega5", 0x802000},
{"atxmega64a1u", "avrxmega5", "avrxmega5", 0x802000},
{"atxmega128a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128b1", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128b3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128d4", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3b", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3bu", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega384c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega384d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128a1", "avrxmega7", "avrxmega7", 0x802000},
{"atxmega128a1u", "avrxmega7", "avrxmega7", 0x802000},
{"atxmega128a4u", "avrxmega7", "avrxmega7", 0x802000},
{"attiny202", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
{"attiny204", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
{"attiny212", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
{"attiny214", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
{"attiny402", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny404", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny406", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny412", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny414", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny416", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny417", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
{"attiny804", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
{"attiny806", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
{"attiny807", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
{"attiny814", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
{"attiny816", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
{"attiny817", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
{"atmega808", "avrxmega3/short-calls", "avrxmega3", 0x803C00},
{"atmega809", "avrxmega3/short-calls", "avrxmega3", 0x803C00},
{"atmega1608", "avrxmega3", "avrxmega3", 0x803800},
{"atmega1609", "avrxmega3", "avrxmega3", 0x803800},
{"atmega3208", "avrxmega3", "avrxmega3", 0x803000},
{"atmega3209", "avrxmega3", "avrxmega3", 0x803000},
{"atmega4808", "avrxmega3", "avrxmega3", 0x802800},
{"atmega4809", "avrxmega3", "avrxmega3", 0x802800},
{"attiny1604", "avrxmega3", "avrxmega3", 0x803C00},
{"attiny1606", "avrxmega3", "avrxmega3", 0x803C00},
{"attiny1607", "avrxmega3", "avrxmega3", 0x803C00},
{"attiny1614", "avrxmega3", "avrxmega3", 0x803800},
{"attiny1616", "avrxmega3", "avrxmega3", 0x803800},
{"attiny1617", "avrxmega3", "avrxmega3", 0x803800},
{"attiny1624", "avrxmega3", "avrxmega3", 0x803800},
{"attiny1626", "avrxmega3", "avrxmega3", 0x803800},
{"attiny1627", "avrxmega3", "avrxmega3", 0x803800},
{"attiny3216", "avrxmega3", "avrxmega3", 0x803800},
{"attiny3217", "avrxmega3", "avrxmega3", 0x803800},
};
std::string GetMCUSubPath(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName)
return std::string(MCU.SubPath);
return "";
}
std::optional<StringRef> GetMCUFamilyName(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName)
return std::optional<StringRef>(MCU.Family);
return std::nullopt;
}
std::optional<unsigned> GetMCUSectionAddressData(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName && MCU.DataAddr > 0)
return std::optional<unsigned>(MCU.DataAddr);
return std::nullopt;
}
const StringRef PossibleAVRLibcLocations[] = {
"/avr",
"/usr/avr",
"/usr/lib/avr",
};
} // end anonymous namespace
/// AVR Toolchain
AVRToolChain::AVRToolChain(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: Generic_ELF(D, Triple, Args) {
GCCInstallation.init(Triple, Args);
if (getCPUName(D, Args, Triple).empty())
D.Diag(diag::warn_drv_avr_mcu_not_specified);
// Only add default libraries if the user hasn't explicitly opted out.
if (!Args.hasArg(options::OPT_nostdlib) &&
!Args.hasArg(options::OPT_nodefaultlibs) && GCCInstallation.isValid()) {
GCCInstallPath = GCCInstallation.getInstallPath();
std::string GCCParentPath(GCCInstallation.getParentLibPath());
getProgramPaths().push_back(GCCParentPath + "/../bin");
}
}
void AVRToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdinc) ||
DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
// Omit if there is no avr-libc installed.
std::optional<std::string> AVRLibcRoot = findAVRLibcInstallation();
if (!AVRLibcRoot)
return;
// Add 'avr-libc/include' to clang system include paths if applicable.
std::string AVRInc = *AVRLibcRoot + "/include";
if (llvm::sys::fs::is_directory(AVRInc))
addSystemInclude(DriverArgs, CC1Args, AVRInc);
}
void AVRToolChain::addClangTargetOptions(
const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadKind) const {
// By default, use `.ctors` (not `.init_array`), as required by libgcc, which
// runs constructors/destructors on AVR.
if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
options::OPT_fno_use_init_array, false))
CC1Args.push_back("-fno-use-init-array");
// Use `-fno-use-cxa-atexit` as default, since avr-libc does not support
// `__cxa_atexit()`.
if (!DriverArgs.hasFlag(options::OPT_fuse_cxa_atexit,
options::OPT_fno_use_cxa_atexit, false))
CC1Args.push_back("-fno-use-cxa-atexit");
}
Tool *AVRToolChain::buildLinker() const {
return new tools::AVR::Linker(getTriple(), *this);
}
std::string
AVRToolChain::getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component,
FileType Type = ToolChain::FT_Static) const {
assert(Type == ToolChain::FT_Static && "AVR only supports static libraries");
// Since AVR can never be a host environment, its compiler-rt library files
// should always have ".a" suffix, even on windows.
SmallString<32> File("/libclang_rt.");
File += Component.str();
File += ".a";
// Return the default compiler-rt path appended with
// "avr/libclang_rt.$COMPONENT.a".
SmallString<256> Path(ToolChain::getCompilerRTPath());
llvm::sys::path::append(Path, "avr");
llvm::sys::path::append(Path, File.str());
return std::string(Path);
}
void AVR::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs, const ArgList &Args,
const char *LinkingOutput) const {
const auto &TC = static_cast<const AVRToolChain &>(getToolChain());
const Driver &D = getToolChain().getDriver();
// Compute information about the target AVR.
std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
std::optional<StringRef> FamilyName = GetMCUFamilyName(CPU);
std::optional<std::string> AVRLibcRoot = TC.findAVRLibcInstallation();
std::optional<unsigned> SectionAddressData = GetMCUSectionAddressData(CPU);
// Compute the linker program path, and use GNU "avr-ld" as default.
const Arg *A = Args.getLastArg(options::OPT_fuse_ld_EQ);
std::string Linker = A ? getToolChain().GetLinkerPath(nullptr)
: getToolChain().GetProgramPath(getShortName());
ArgStringList CmdArgs;
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
// Enable garbage collection of unused sections.
if (!Args.hasArg(options::OPT_r))
CmdArgs.push_back("--gc-sections");
// Add library search paths before we specify libraries.
Args.AddAllArgs(CmdArgs, options::OPT_L);
getToolChain().AddFilePathLibArgs(Args, CmdArgs);
// Currently we only support libgcc and compiler-rt.
auto RtLib = TC.GetRuntimeLibType(Args);
assert(
(RtLib == ToolChain::RLT_Libgcc || RtLib == ToolChain::RLT_CompilerRT) &&
"unknown runtime library");
// Only add default libraries if the user hasn't explicitly opted out.
bool LinkStdlib = false;
if (!Args.hasArg(options::OPT_nostdlib) && !Args.hasArg(options::OPT_r) &&
!Args.hasArg(options::OPT_nodefaultlibs)) {
if (!CPU.empty()) {
if (!FamilyName) {
// We do not have an entry for this CPU in the family
// mapping table yet.
D.Diag(diag::warn_drv_avr_family_linking_stdlibs_not_implemented)
<< CPU;
} else if (!AVRLibcRoot) {
// No avr-libc found and so no runtime linked.
D.Diag(diag::warn_drv_avr_libc_not_found);
} else {
std::string SubPath = GetMCUSubPath(CPU);
// Add path of avr-libc.
CmdArgs.push_back(
Args.MakeArgString(Twine("-L") + *AVRLibcRoot + "/lib/" + SubPath));
if (RtLib == ToolChain::RLT_Libgcc)
CmdArgs.push_back(Args.MakeArgString("-L" + TC.getGCCInstallPath() +
"/" + SubPath));
LinkStdlib = true;
}
}
if (!LinkStdlib)
D.Diag(diag::warn_drv_avr_stdlib_not_linked);
}
if (!Args.hasArg(options::OPT_r)) {
if (SectionAddressData) {
CmdArgs.push_back(
Args.MakeArgString("--defsym=__DATA_REGION_ORIGIN__=0x" +
Twine::utohexstr(*SectionAddressData)));
} else {
// We do not have an entry for this CPU in the address mapping table
// yet.
D.Diag(diag::warn_drv_avr_linker_section_addresses_not_implemented)
<< CPU;
}
}
if (D.isUsingLTO()) {
assert(!Inputs.empty() && "Must have at least one input.");
// Find the first filename InputInfo object.
auto Input = llvm::find_if(
Inputs, [](const InputInfo &II) -> bool { return II.isFilename(); });
if (Input == Inputs.end())
// For a very rare case, all of the inputs to the linker are
// InputArg. If that happens, just use the first InputInfo.
Input = Inputs.begin();
addLTOOptions(TC, Args, CmdArgs, Output, *Input,
D.getLTOMode() == LTOK_Thin);
}
// If the family name is known, we can link with the device-specific libgcc.
// Without it, libgcc will simply not be linked. This matches avr-gcc
// behavior.
if (LinkStdlib) {
assert(!CPU.empty() && "CPU name must be known in order to link stdlibs");
CmdArgs.push_back("--start-group");
// Add the object file for the CRT.
std::string CrtFileName = std::string("-l:crt") + CPU + std::string(".o");
CmdArgs.push_back(Args.MakeArgString(CrtFileName));
// Link to libgcc.
if (RtLib == ToolChain::RLT_Libgcc)
CmdArgs.push_back("-lgcc");
// Link to generic libraries of avr-libc.
CmdArgs.push_back("-lm");
CmdArgs.push_back("-lc");
// Add the link library specific to the MCU.
CmdArgs.push_back(Args.MakeArgString(std::string("-l") + CPU));
// Add the relocatable inputs.
AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
// We directly use libclang_rt.builtins.a as input file, instead of using
// '-lclang_rt.builtins'.
if (RtLib == ToolChain::RLT_CompilerRT) {
std::string RtLib =
getToolChain().getCompilerRT(Args, "builtins", ToolChain::FT_Static);
if (llvm::sys::fs::exists(RtLib))
CmdArgs.push_back(Args.MakeArgString(RtLib));
}
CmdArgs.push_back("--end-group");
// Add avr-libc's linker script to lld by default, if it exists.
if (!Args.hasArg(options::OPT_T) &&
Linker.find("avr-ld") == std::string::npos) {
std::string Path(*AVRLibcRoot + "/lib/ldscripts/");
Path += *FamilyName;
Path += ".x";
if (llvm::sys::fs::exists(Path))
CmdArgs.push_back(Args.MakeArgString("-T" + Path));
}
// Otherwise add user specified linker script to either avr-ld or lld.
else
Args.AddAllArgs(CmdArgs, options::OPT_T);
if (Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax, true))
CmdArgs.push_back("--relax");
} else {
AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
}
// Specify the family name as the emulation mode to use.
// This is almost always required because otherwise avr-ld
// will assume 'avr2' and warn about the program being larger
// than the bare minimum supports.
if (Linker.find("avr-ld") != std::string::npos && FamilyName)
CmdArgs.push_back(Args.MakeArgString(std::string("-m") + *FamilyName));
C.addCommand(std::make_unique<Command>(
JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
CmdArgs, Inputs, Output));
}
std::optional<std::string> AVRToolChain::findAVRLibcInstallation() const {
// Search avr-libc installation according to avr-gcc installation.
std::string GCCParent(GCCInstallation.getParentLibPath());
std::string Path(GCCParent + "/avr");
if (llvm::sys::fs::is_directory(Path))
return Path;
Path = GCCParent + "/../avr";
if (llvm::sys::fs::is_directory(Path))
return Path;
// Search avr-libc installation from possible locations, and return the first
// one that exists, if there is no avr-gcc installed.
for (StringRef PossiblePath : PossibleAVRLibcLocations) {
std::string Path = getDriver().SysRoot + PossiblePath.str();
if (llvm::sys::fs::is_directory(Path))
return Path;
}
return std::nullopt;
}