Driver: add a cygwin linker tool
This adds a linker tool for the Windows cygwin environment. This linker
invocation is significantly different from the generic ld invocation. It
requires additional parameters as well as does not accept some normal
parameters. This should fix self-hosting on Cygwin.
llvm-svn: 211995
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 06c6810..24d4bf9 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -7315,6 +7315,172 @@
C.addCommand(new Command(JA, *this, Exec, CmdArgs));
}
+void cygwin::Link::AddLibGCC(const ArgList &Args, ArgStringList &CmdArgs) const {
+ if (Args.hasArg(options::OPT_static) ||
+ Args.hasArg(options::OPT_static_libgcc)) {
+ CmdArgs.push_back("-lgcc");
+ CmdArgs.push_back("-lgcc_eh");
+ } else {
+ CmdArgs.push_back("-lgcc_s");
+ CmdArgs.push_back("-lgcc");
+ }
+}
+
+void cygwin::Link::ConstructJob(Compilation &C, const JobAction &JA,
+ const InputInfo &Output,
+ const InputInfoList &Inputs,
+ const llvm::opt::ArgList &Args,
+ const char *LinkingOutput) const {
+ static const char *WrappedSymbols[] = {
+ "_Znwj",
+ "_Znaj",
+ "_ZdlPv",
+ "_ZdaPv",
+ "_ZnwjRKSt9nothrow_t",
+ "_ZnajRKSt9nothrow_t",
+ "_ZdlPvRKSt9nothrow_t",
+ "_ZdaPvRKSt9nothrow_t",
+ };
+
+ const auto &ToolChain = getToolChain();
+ ArgStringList CmdArgs;
+
+ // Silence warning for "clang -g foo.o -o foo"
+ Args.ClaimAllArgs(options::OPT_g_Group);
+ // and "clang -emit-llvm foo.o -o foo"
+ Args.ClaimAllArgs(options::OPT_emit_llvm);
+ // and for "clang -w foo.o -o foo". Other warning options are already
+ // handled somewhere else.
+ Args.ClaimAllArgs(options::OPT_w);
+
+ // FIXME: -mwindows should pass --subsystem windows
+ // FIXME: -mconsole should pass --subsystem console
+
+ // FIXME: this can be disabled via -mno-use-libstdc-wrappers
+ for (const auto &Symbol : WrappedSymbols) {
+ CmdArgs.push_back("--wrap");
+ CmdArgs.push_back(Symbol);
+ }
+
+ if (Args.hasArg(options::OPT_shared))
+ CmdArgs.push_back("--shared");
+ else if (Args.hasArg(options::OPT_mdll))
+ CmdArgs.push_back("--dll");
+
+ if (Args.hasArg(options::OPT_static))
+ CmdArgs.push_back("-Bstatic");
+ else
+ CmdArgs.push_back("-Bdynamic");
+
+ if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_mdll)) {
+ CmdArgs.push_back("--enable-auto-image-base");
+
+ CmdArgs.push_back("-e");
+ CmdArgs.push_back("__cygwin_dll_entry@12");
+ }
+
+ CmdArgs.push_back("--dll-search-prefix=cyg");
+
+ if (Args.hasArg(options::OPT_rdynamic))
+ CmdArgs.push_back("--export-all-symbols");
+
+ if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_mdll)) {
+ CmdArgs.push_back("--large-address-aware");
+ CmdArgs.push_back("--tsaware");
+ }
+
+ if (Args.hasArg(options::OPT_pie))
+ CmdArgs.push_back("-pie");
+
+ AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs);
+
+ Args.AddAllArgs(CmdArgs, options::OPT_e);
+ // FIXME: add -N, -n flags
+ Args.AddLastArg(CmdArgs, options::OPT_r);
+ Args.AddLastArg(CmdArgs, options::OPT_s);
+ Args.AddLastArg(CmdArgs, options::OPT_t);
+ Args.AddAllArgs(CmdArgs, options::OPT_u_Group);
+ Args.AddLastArg(CmdArgs, options::OPT_Z_Flag);
+
+ if (!Args.hasArg(options::OPT_nostdlib) &&
+ !Args.hasArg(options::OPT_nostartfiles)) {
+ if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_mdll)) {
+ CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
+ if (Args.hasArg(options::OPT_pg))
+ CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("gcrt0.o")));
+ }
+ CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
+ }
+
+ Args.AddAllArgs(CmdArgs, options::OPT_L);
+
+ // FIXME: support mudflap: wrap the following:
+ // -fmudflap || -fmudflapth:
+ // static const char *WrappedStaticSymbols[] = {
+ // "malloc", "free", "calloc", "realloc", "mmap", "mmap64", "munmap",
+ // "alloca",
+ // };
+ // -fmudflapth:
+ // static const char *WrappedStaticSymbols[] = {
+ // "pthread_create",
+ // };
+ // -fmudflap || -fmudflapth:
+ // static const char *WrappedSymbols[] = {
+ // "main",
+ // };
+
+ for (const auto &Path : ToolChain.getFilePaths())
+ CmdArgs.push_back(Args.MakeArgString(StringRef("-L") + Path));
+
+ CmdArgs.push_back("-o");
+ CmdArgs.push_back(Output.getFilename());
+
+ // FIXME: support -freopen, -ftree-parallelize-loops=*
+ // FIXME: support itm (-fgnu-tm)
+ // FIXME: support mudflap (-fmudflap || -fmudflapth) ? -export-dynamic : ""
+
+ if (Args.hasArg(options::OPT_fsplit_stack))
+ CmdArgs.push_back("--wrap=pthread_create");
+
+ if (Args.hasArg(options::OPT_fprofile_arcs) ||
+ Args.hasArg(options::OPT_fprofile_generate) ||
+ Args.hasArg(options::OPT_coverage))
+ CmdArgs.push_back("-lgcov");
+
+ if (!Args.hasArg(options::OPT_nostdlib)) {
+ if (!Args.hasArg(options::OPT_nodefaultlibs)) {
+ // FIXME: support asan, tsan
+
+ if (Args.hasArg(options::OPT_fstack_protector) ||
+ Args.hasArg(options::OPT_fstack_protector_all)) {
+ CmdArgs.push_back("-lssp_nonshared");
+ CmdArgs.push_back("-lssp");
+ }
+
+ AddLibGCC(Args, CmdArgs);
+ if (Args.hasArg(options::OPT_pg))
+ CmdArgs.push_back("-lgmon");
+ CmdArgs.push_back("-lcygwin");
+ // FIXME: -mwindows: -lgdi32 -lcomdlg32
+ CmdArgs.push_back("-ladvapi32");
+ CmdArgs.push_back("-lshell32");
+ CmdArgs.push_back("-luser32");
+ CmdArgs.push_back("-lkernel32");
+ AddLibGCC(Args, CmdArgs);
+ }
+
+ if (!Args.hasArg(options::OPT_nostartfiles)) {
+ ToolChain.AddFastMathRuntimeIfAvailable(Args, CmdArgs);
+ CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
+ }
+ }
+
+ Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
+
+ const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
+ C.addCommand(new Command(JA, *this, Exec, CmdArgs));
+}
+
void minix::Assemble::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,