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Linking with ld/gold/rust-lld: unknown -z value: ,relro,-z,now #52634

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alecmocatta opened this issue Jul 22, 2018 · 2 comments · Fixed by #52654
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Linking with ld/gold/rust-lld: unknown -z value: ,relro,-z,now #52634

alecmocatta opened this issue Jul 22, 2018 · 2 comments · Fixed by #52654

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@alecmocatta
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Compiling with an gcc/ld-like -C linker other than gcc/clang results in the -z,relro,-z,now argument not being recognised.

It seems gcc and clang accept the argument -Wl,-z,relro,-z,now where other ld-like linkers expect -z relro -z now.

working:

"-C linker=gcc"
"-C linker=clang"

not working:

"-C linker=ld -Z linker-flavor=ld"
ld: warning: -z ,relro,-z,now ignored.

"-C linker=gold -Z linker-flavor=ld"
gold: ,relro,-z,now: unknown -z option

"-C linker=rust-lld -Z linker-flavor=ld.lld"
rust-lld: error: unknown -z value: ,relro,-z,now
@alexcrichton
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Thanks for the report! I believe the bug is here where we actually need to use multiple invocations of linker_arg for each argument rather than packing them all in one. If you're curious, want to test out a patch doing that locally and see if it works for you?

@alecmocatta
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I suspected the same. Will PR shortly.

@mdaffin mdaffin mentioned this issue Jul 23, 2018
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@alecmocatta alecmocatta mentioned this issue Jul 24, 2018
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bors added a commit that referenced this issue Jul 25, 2018
@bors
Auto merge of #52654 - alecmocatta:master, r=alexcrichton
b4b7681 
Format linker args in a way that works for gcc and ld

Pass multiple linker arguments rather than concatenate with commas (fixes #52634).

`-l library` -> `-llibrary` to work with apple's ld.

To build with apple's ld I'm currently also passing `-C link-args="-arch x86_64 -macosx_version_min 10.13.0"`. I'll try and understand the latter flag better before PRing that.

This PR currently works for me. Hopefully CI will pick up any grievous ramifications in other toolchains?

Thanks to @alexcrichton for the pointer to the relevant code!
Mark-Simulacrum added a commit to Mark-Simulacrum/rust that referenced this issue Jul 26, 2018
@Mark-Simulacrum
Rollup merge of rust-lang#52654 - alecmocatta:master, r=alexcrichton
9f91195 
Format linker args in a way that works for gcc and ld

Pass multiple linker arguments rather than concatenate with commas (fixes rust-lang#52634).

`-l library` -> `-llibrary` to work with apple's ld.

To build with apple's ld I'm currently also passing `-C link-args="-arch x86_64 -macosx_version_min 10.13.0"`. I'll try and understand the latter flag better before PRing that.

This PR currently works for me. Hopefully CI will pick up any grievous ramifications in other toolchains?

Thanks to @alexcrichton for the pointer to the relevant code!
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Format linker args in a way that works for gcc and ld alecmocatta/rust
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@alexcrichton @alecmocatta