For riscv kernel builds, add -N to LDFLAGS instead of replacing the SYSTEM_LD variable.
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Authored by • ian on Dec 24 2019, 11:16 PM.

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imp

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riscv

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rS356077: For riscv kernel builds, add -N to LDFLAGS instead of replacing the

Summary

This avoids duplicating the contents of SYSTEM_LD from kern.pre.mk just to add the -N flag to it. If the basic linker command ever needs to be changed, this will be one less place that has to be found and fixed.

Test Plan

Not tested at all, could a riscv person please test this?

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rS FreeBSD src repository - subversion

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Build Status

Buildable 28308

Event Timeline

• ian created this revision.Dec 24 2019, 11:16 PM

Harbormaster completed remote builds in B28308: Diff 65968.Dec 24 2019, 11:16 PM

Does anyone know why riscv needs writable text segments? Or if it really does?

If you can find out why -N is needed, please add a comment. Otherwise we are good to go

This revision is now accepted and ready to land.Dec 24 2019, 11:45 PM

In D22920#502031, @ian wrote:

Does anyone know why riscv needs writable text segments? Or if it really does?

It doesn't seem to be required. It builds, boots and runs regression tests (although I've not run the full set yet) happily without the -N.

Closed by commit rS356077: For riscv kernel builds, add -N to LDFLAGS instead of replacing the (authored by • ian). · Explain WhyDec 25 2019, 5:27 PM

This revision was automatically updated to reflect the committed changes.

• ian added a commit: rS356077: For riscv kernel builds, add -N to LDFLAGS instead of replacing the.

Just an update to note that the commit for this was reverted in r356078 due to CI build failures. I'm unable to install a working riscv toolchain for building and testing myself, apparently at least in part because I'm still running 12.0-stable (and if I try to upgrade from that my video card turns into a pumpkin).

In D22920#502165, @ian wrote:

Just an update to note that the commit for this was reverted in r356078 due to CI build failures. I'm unable to install a working riscv toolchain for building and testing myself, apparently at least in part because I'm still running 12.0-stable (and if I try to upgrade from that my video card turns into a pumpkin).

Adding -Bdynamic to LDFLAGS fixes the compile issue with the GCC toolchain.

If you are able, can you send me the error you get while trying to build using 12.0-stable? You should be able to build riscv using any supported FreeBSD version.

mhorne mentioned this in D24909: Simplify the RISC-V kernel linker invocation.May 19 2020, 1:06 AM

mhorne mentioned this in rS361402: Simplify the RISC-V kernel linker invocation.May 22 2020, 6:55 PM