1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "Cygwin.h" 10 #include "clang/Config/config.h" 11 #include "clang/Driver/CommonArgs.h" 12 #include "clang/Driver/Driver.h" 13 #include "clang/Driver/Options.h" 14 #include "llvm/Support/Path.h" 15 #include "llvm/Support/VirtualFileSystem.h" 16 17 using namespace clang::driver; 18 using namespace clang::driver::toolchains; 19 using namespace clang; 20 using namespace llvm::opt; 21 22 using tools::addPathIfExists; 23 24 Cygwin::Cygwin(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) 25 : Generic_GCC(D, Triple, Args) { 26 GCCInstallation.init(Triple, Args); 27 std::string SysRoot = computeSysRoot(); 28 ToolChain::path_list &PPaths = getProgramPaths(); 29 30 Generic_GCC::PushPPaths(PPaths); 31 32 path_list &Paths = getFilePaths(); 33 34 Generic_GCC::AddMultiarchPaths(D, SysRoot, "lib", Paths); 35 36 // Similar to the logic for GCC above, if we are currently running Clang 37 // inside of the requested system root, add its parent library path to those 38 // searched. 39 // FIXME: It's not clear whether we should use the driver's installed 40 // directory ('Dir' below) or the ResourceDir. 41 if (StringRef(D.Dir).starts_with(SysRoot)) 42 addPathIfExists(D, D.Dir + "/../lib", Paths); 43 44 addPathIfExists(D, SysRoot + "/lib", Paths); 45 addPathIfExists(D, SysRoot + "/usr/lib", Paths); 46 addPathIfExists(D, SysRoot + "/usr/lib/w32api", Paths); 47 } 48 49 llvm::ExceptionHandling Cygwin::GetExceptionModel(const ArgList &Args) const { 50 if (getArch() == llvm::Triple::x86_64 || getArch() == llvm::Triple::aarch64 || 51 getArch() == llvm::Triple::arm || getArch() == llvm::Triple::thumb) 52 return llvm::ExceptionHandling::WinEH; 53 return llvm::ExceptionHandling::DwarfCFI; 54 } 55 56 void Cygwin::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 57 ArgStringList &CC1Args) const { 58 const Driver &D = getDriver(); 59 std::string SysRoot = computeSysRoot(); 60 61 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) 62 return; 63 64 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) 65 addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include"); 66 67 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { 68 SmallString<128> P(D.ResourceDir); 69 llvm::sys::path::append(P, "include"); 70 addSystemInclude(DriverArgs, CC1Args, P); 71 } 72 73 if (DriverArgs.hasArg(options::OPT_nostdlibinc)) 74 return; 75 76 // Check for configure-time C include directories. 77 StringRef CIncludeDirs(C_INCLUDE_DIRS); 78 if (CIncludeDirs != "") { 79 SmallVector<StringRef, 5> Dirs; 80 CIncludeDirs.split(Dirs, ":"); 81 for (StringRef Dir : Dirs) { 82 StringRef Prefix = 83 llvm::sys::path::is_absolute(Dir) ? "" : StringRef(SysRoot); 84 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + Dir); 85 } 86 return; 87 } 88 89 // Lacking those, try to detect the correct set of system includes for the 90 // target triple. 91 92 AddMultilibIncludeArgs(DriverArgs, CC1Args); 93 94 // On systems using multiarch, add /usr/include/$triple before 95 // /usr/include. 96 std::string MultiarchIncludeDir = getTriple().str(); 97 if (!MultiarchIncludeDir.empty() && 98 D.getVFS().exists(SysRoot + "/usr/include/" + MultiarchIncludeDir)) 99 addExternCSystemInclude(DriverArgs, CC1Args, 100 SysRoot + "/usr/include/" + MultiarchIncludeDir); 101 102 // Add an include of '/include' directly. This isn't provided by default by 103 // system GCCs, but is often used with cross-compiling GCCs, and harmless to 104 // add even when Clang is acting as-if it were a system compiler. 105 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include"); 106 107 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include"); 108 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include/w32api"); 109 } 110