[cfe-dev] Test failuire: Driver/baremetal.cpp

Rui Ueyama via cfe-dev cfe-dev at lists.llvm.org
Thu Jul 26 10:07:54 PDT 2018


Hi,

I wonder if this test really needs to depend on lld. Maybe you can replace
`ld.lld` with `ld` so that the test passes for any linker?

On Thu, Jul 26, 2018 at 9:21 AM David Greene via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> I've configured clang to use gold, which seems to cause
> test/Driver/baremetal.cpp to fail.  The test works like this:
>
> // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
> // RUN:     -target armv6m-none-eabi \
> // RUN:     -T semihosted.lds \
> // RUN:     -L some/directory/user/asked/for \
> // RUN:     --sysroot=%S/Inputs/baremetal_arm \
> // RUN:   | FileCheck --check-prefix=CHECK-V6M-C %s
> // CHECK-V6M-C:
> "[[PREFIX_DIR:.*]]{{[/\\]+}}{{[^/^\\]+}}{{[/\\]+}}clang{{.*}}" "-cc1"
> "-triple" "thumbv6m-none--eabi"
> // CHECK-V6M-C-SAME: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
> // CHECK-V6M-C-SAME: "-isysroot" "[[SYSROOT:[^"]*]]"
> // CHECK-V6M-C-SAME: "-internal-isystem"
> "[[SYSROOT]]{{[/\\]+}}include{{[/\\]+}}c++{{[/\\]+}}v1"
> // CHECk-V6M-C-SAME: "-internal-isystem" "[[SYSROOT]]{{[/\\]+}}include"
> // CHECK-V6M-C-SAME: "-x" "c++" "{{.*}}baremetal.cpp"
> // CHECK-V6M-C-NEXT: "{{[^"]*}}ld.lld{{(\.exe)?}}" "{{.*}}.o" "-Bstatic"
>
> The NEXT line is problematic as it assumes ld.lld.  I did not build lld,
> though I could simply to get the test working.  But building lld is not
> enough as I configured with CLANG_DEFAULT_LINKER=gold.  It seems like
> the RUN line needs -fuse-ld=lld.
>
> Is there a REQUIRES clause for lld being present and default?  I could
> not find somthing appropriate in lit's config.available_features.
>
> It's certainly possible I'm doing something wrong, as I assume many
> people use gold with clang.  Maybe those people don't run the tests?
>
> I am happy to update the test if someone can point me to a good REQUIRES
> clause.
>
> Thanks!
>
>                                  -David
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