rovka updated this revision to Diff 433988.
rovka added a comment.
- Update for MinGW.
- Add `/subsystem:console` to help `link.exe` understand what's going on.
Thanks for all the comments. I don't have a MinGW environment readily available
for testing. @mmuetzel Could you test this? Alternatively, do you know whether
we have any buildbots that would test this?
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D126291/new/
https://reviews.llvm.org/D126291
Files:
clang/lib/Driver/ToolChains/CommonArgs.cpp
clang/lib/Driver/ToolChains/CommonArgs.h
clang/lib/Driver/ToolChains/Darwin.cpp
clang/lib/Driver/ToolChains/Gnu.cpp
clang/lib/Driver/ToolChains/MSVC.cpp
flang/test/Driver/linker-flags-windows.f90
flang/test/Driver/linker-flags.f90
Index: flang/test/Driver/linker-flags.f90
===================================================================
--- flang/test/Driver/linker-flags.f90
+++ flang/test/Driver/linker-flags.f90
@@ -5,9 +5,9 @@
! NOTE: The additional linker flags tested here are currently only specified for
! GNU and Darwin. The following line will make sure that this test is skipped on
! Windows. If you are running this test on a yet another platform and it is
-! failing for you, please either update the following or (preferably) update the
-! linker invocation accordingly.
-! UNSUPPORTED: system-windows
+! failing for you, please either update the following or (preferably)
+! create a similar test for your platform.
+! UNSUPPORTED: windows-msvc
!------------
! RUN COMMAND
Index: flang/test/Driver/linker-flags-windows.f90
===================================================================
--- /dev/null
+++ flang/test/Driver/linker-flags-windows.f90
@@ -0,0 +1,25 @@
+! Verify that the Fortran runtime libraries are present in the linker
+! invocation. These libraries are added on top of other standard runtime
+! libraries that the Clang driver will include.
+
+! NOTE: The additional linker flags tested here are currently specified in
+! clang/lib/Driver/Toolchains/MSVC.cpp.
+! REQUIRES: windows-msvc
+
+! RUN: %flang -### %S/Inputs/hello.f90 2>&1 | FileCheck %s
+
+! Compiler invocation to generate the object file
+! CHECK-LABEL: {{.*}} "-emit-obj"
+! CHECK-SAME: "-o" "[[object_file:.*]]" {{.*}}Inputs/hello.f90
+
+! Linker invocation to generate the executable
+! NOTE: This check should also match if the default linker is lld-link.exe
+! CHECK-LABEL: link.exe
+! CHECK-NOT: libcmt
+! CHECK-NOT: oldnames
+! CHECK-SAME: Fortran_main.lib
+! CHECK-SAME: FortranRuntime.lib
+! CHECK-SAME: FortranDecimal.lib
+! CHECK-SAME: /subsystem:console
+! CHECK-SAME: "[[object_file]]"
+
Index: clang/lib/Driver/ToolChains/MSVC.cpp
===================================================================
--- clang/lib/Driver/ToolChains/MSVC.cpp
+++ clang/lib/Driver/ToolChains/MSVC.cpp
@@ -81,7 +81,7 @@
Args.MakeArgString(std::string("-out:") + Output.getFilename()));
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles) &&
- !C.getDriver().IsCLMode()) {
+ !C.getDriver().IsCLMode() && !C.getDriver().IsFlangMode()) {
CmdArgs.push_back("-defaultlib:libcmt");
CmdArgs.push_back("-defaultlib:oldnames");
}
@@ -130,6 +130,17 @@
Args.MakeArgString(std::string("-libpath:") + WindowsSdkLibPath));
}
+ if (C.getDriver().IsFlangMode()) {
+ tools::addFortranRuntimeLibraryPath(TC, Args, CmdArgs);
+ tools::addFortranRuntimeLibs(TC, CmdArgs);
+
+ // Inform the MSVC linker that we're generating a console application, i.e.
+ // one with `main` as the "user-defined" entry point. The `main` function is
+ // defined in flang's runtime libraries.
+ if (TC.getTriple().isKnownWindowsMSVCEnvironment())
+ CmdArgs.push_back("/subsystem:console");
+ }
+
// Add the compiler-rt library directories to libpath if they exist to help
// the linker find the various sanitizer, builtin, and profiling runtimes.
for (const auto &LibPath : TC.getLibraryPaths()) {
Index: clang/lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Gnu.cpp
+++ clang/lib/Driver/ToolChains/Gnu.cpp
@@ -599,7 +599,7 @@
// TODO: Make this work unconditionally once Flang is mature enough.
if (D.IsFlangMode() && Args.hasArg(options::OPT_flang_experimental_exec)) {
addFortranRuntimeLibraryPath(ToolChain, Args, CmdArgs);
- addFortranRuntimeLibs(CmdArgs);
+ addFortranRuntimeLibs(ToolChain, CmdArgs);
CmdArgs.push_back("-lm");
}
Index: clang/lib/Driver/ToolChains/Darwin.cpp
===================================================================
--- clang/lib/Driver/ToolChains/Darwin.cpp
+++ clang/lib/Driver/ToolChains/Darwin.cpp
@@ -644,7 +644,7 @@
if (getToolChain().getDriver().IsFlangMode() &&
Args.hasArg(options::OPT_flang_experimental_exec)) {
addFortranRuntimeLibraryPath(getToolChain(), Args, CmdArgs);
- addFortranRuntimeLibs(CmdArgs);
+ addFortranRuntimeLibs(getToolChain(), CmdArgs);
}
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs))
Index: clang/lib/Driver/ToolChains/CommonArgs.h
===================================================================
--- clang/lib/Driver/ToolChains/CommonArgs.h
+++ clang/lib/Driver/ToolChains/CommonArgs.h
@@ -121,7 +121,8 @@
bool IsOffloadingHost = false, bool GompNeedsRT = false);
/// Adds Fortran runtime libraries to \p CmdArgs.
-void addFortranRuntimeLibs(llvm::opt::ArgStringList &CmdArgs);
+void addFortranRuntimeLibs(const ToolChain &TC,
+ llvm::opt::ArgStringList &CmdArgs);
/// Adds the path for the Fortran runtime libraries to \p CmdArgs.
void addFortranRuntimeLibraryPath(const ToolChain &TC,
Index: clang/lib/Driver/ToolChains/CommonArgs.cpp
===================================================================
--- clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -751,10 +751,17 @@
return true;
}
-void tools::addFortranRuntimeLibs(llvm::opt::ArgStringList &CmdArgs) {
- CmdArgs.push_back("-lFortran_main");
- CmdArgs.push_back("-lFortranRuntime");
- CmdArgs.push_back("-lFortranDecimal");
+void tools::addFortranRuntimeLibs(const ToolChain &TC,
+ llvm::opt::ArgStringList &CmdArgs) {
+ if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
+ CmdArgs.push_back("Fortran_main.lib");
+ CmdArgs.push_back("FortranRuntime.lib");
+ CmdArgs.push_back("FortranDecimal.lib");
+ } else {
+ CmdArgs.push_back("-lFortran_main");
+ CmdArgs.push_back("-lFortranRuntime");
+ CmdArgs.push_back("-lFortranDecimal");
+ }
}
void tools::addFortranRuntimeLibraryPath(const ToolChain &TC,
@@ -767,7 +774,10 @@
SmallString<256> DefaultLibPath =
llvm::sys::path::parent_path(TC.getDriver().Dir);
llvm::sys::path::append(DefaultLibPath, "lib");
- CmdArgs.push_back(Args.MakeArgString("-L" + DefaultLibPath));
+ if (TC.getTriple().isKnownWindowsMSVCEnvironment())
+ CmdArgs.push_back(Args.MakeArgString("-libpath:" + DefaultLibPath));
+ else
+ CmdArgs.push_back(Args.MakeArgString("-L" + DefaultLibPath));
}
static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
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