Failed to run 03-setup on macOS

[huisedenanhai]

macOS
rustc 1.83.0 (90b35a623 2024-11-26)

cargo build log

   Compiling semver-parser v0.7.0
   Compiling proc-macro2 v1.0.94
   Compiling unicode-ident v1.0.18
   Compiling cortex-m v0.7.7
   Compiling cortex-m-rt v0.7.5
   Compiling critical-section v1.2.0
   Compiling nb v1.1.0
   Compiling void v1.0.2
   Compiling nb v0.1.3
   Compiling vcell v0.1.3
   Compiling bitfield v0.13.2
   Compiling volatile-register v0.2.2
   Compiling embedded-hal v0.2.7
   Compiling nrf52833-pac v0.12.2
   Compiling ufmt-write v0.1.0
   Compiling semver v0.9.0
   Compiling rtt-target v0.5.0
   Compiling rtt-check v0.1.0 (/Users/l/Desktop/Projects/discovery-mb2/mdbook/src/03-setup)
   Compiling rustc_version v0.2.3
   Compiling panic-rtt-target v0.1.3
   Compiling bare-metal v0.2.5
   Compiling quote v1.0.40
   Compiling syn v2.0.100
   Compiling cortex-m-rt-macros v0.7.5
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.41s
      Config default
      Target /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/rtt-check
 WARN probe_rs::flashing::loader: No loadable segments were found in the ELF file.
       Error No loadable segments were found in the ELF file.

The generated elf file has no .text section

arm-none-eabi-objdump -h /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/rtt-check

/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/rtt-check:     file format elf32-littlearm

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .debug_abbrev 000021b1  00000000  00000000  00000094  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  1 .debug_info   0002e247  00000000  00000000  00002245  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  2 .debug_aranges 00001b00  00000000  00000000  0003048c  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  3 .debug_ranges 0001c730  00000000  00000000  00031f8c  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  4 .debug_str    00046ccb  00000000  00000000  0004e6bc  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  5 .comment      00000099  00000000  00000000  00095387  2**0
                  CONTENTS, READONLY
  6 .ARM.attributes 0000003a  00000000  00000000  00095420  2**0
                  CONTENTS, READONLY
  7 .debug_frame  00005a98  00000000  00000000  0009545c  2**2
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  8 .debug_line   00025417  00000000  00000000  0009aef4  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS
  9 .debug_loc    0000019a  00000000  00000000  000c030b  2**0
                  CONTENTS, READONLY, DEBUGGING, OCTETS

I'm new to embedded system development. Not sure how to fix it. But there seems to be some problem in generated code?

[BartMassey]

This is quite odd. I don't have a Mac and so cannot try to reproduce.

Please run cargo clean; cargo build -v from the command line and attach the output of that here. Maybe I can spot something.

[huisedenanhai]

output

   Compiling semver-parser v0.7.0
   Compiling proc-macro2 v1.0.94
   Compiling unicode-ident v1.0.18
   Compiling cortex-m v0.7.7
   Compiling cortex-m-rt v0.7.5
   Compiling nb v1.1.0
   Compiling critical-section v1.2.0
   Compiling void v1.0.2
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name semver_parser --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/semver-parser-0.7.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=dbc537621bb14e63 -C extra-filename=-dbc537621bb14e63 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name unicode_ident --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/unicode-ident-1.0.18/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=394c647780ca9e46 -C extra-filename=-394c647780ca9e46 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name build_script_build --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.94/build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="default"' --cfg 'feature="proc-macro"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("default", "nightly", "proc-macro", "span-locations"))' -C metadata=f6ef4d135727c03a -C extra-filename=-f6ef4d135727c03a --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/build/proc-macro2-f6ef4d135727c03a -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name build_script_build --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cortex-m-0.7.7/build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="critical-section"' --cfg 'feature="critical-section-single-core"' --cfg 'feature="inline-asm"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("cm7", "cm7-r0p1", "critical-section", "critical-section-single-core", "inline-asm", "linker-plugin-lto", "serde", "std"))' -C metadata=e53d088258f5159b -C extra-filename=-e53d088258f5159b --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/build/cortex-m-e53d088258f5159b -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name build_script_build --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cortex-m-rt-0.7.5/build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("device", "paint-stack", "set-sp", "set-vtor", "zero-init-ram"))' -C metadata=458da89186856eec -C extra-filename=-458da89186856eec --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/build/cortex-m-rt-458da89186856eec -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name nb --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nb-1.1.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("defmt-0-3"))' -C metadata=275f658a8eb0e60c -C extra-filename=-275f658a8eb0e60c --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name critical_section --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/critical-section-1.2.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="restore-state-bool"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("restore-state-bool", "restore-state-none", "restore-state-u16", "restore-state-u32", "restore-state-u64", "restore-state-u8", "restore-state-usize", "std"))' -C metadata=bf56463bcb88eb17 -C extra-filename=-bf56463bcb88eb17 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name void --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/void-1.0.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("default", "std"))' -C metadata=35c243d8f14df74f -C extra-filename=-35c243d8f14df74f --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
   Compiling nb v0.1.3
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name nb --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nb-0.1.3/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("unstable"))' -C metadata=147e593a76303cc4 -C extra-filename=-147e593a76303cc4 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern nb=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libnb-275f658a8eb0e60c.rmeta --cap-lints allow -L /opt/homebrew/lib`
   Compiling vcell v0.1.3
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name vcell --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/vcell-0.1.3/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("const-fn"))' -C metadata=315eda1bcb95e0bd -C extra-filename=-315eda1bcb95e0bd --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
   Compiling ufmt-write v0.1.0
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name ufmt_write --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ufmt-write-0.1.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("std"))' -C metadata=3241a1f091de07de -C extra-filename=-3241a1f091de07de --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
   Compiling bitfield v0.13.2
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name bitfield --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bitfield-0.13.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=31a66970bd4c1761 -C extra-filename=-31a66970bd4c1761 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
   Compiling volatile-register v0.2.2
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name volatile_register --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/volatile-register-0.2.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=a1f31706abbbe790 -C extra-filename=-a1f31706abbbe790 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern vcell=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libvcell-315eda1bcb95e0bd.rmeta --cap-lints allow -L /opt/homebrew/lib`
   Compiling embedded-hal v0.2.7
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name embedded_hal --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/embedded-hal-0.2.7/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("unproven"))' -C metadata=894310fccd52fb65 -C extra-filename=-894310fccd52fb65 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern nb=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libnb-147e593a76303cc4.rmeta --extern void=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libvoid-35c243d8f14df74f.rmeta --cap-lints allow -L /opt/homebrew/lib`
   Compiling nrf52833-pac v0.12.2
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name build_script_build --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nrf52833-pac-0.12.2/build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="cortex-m-rt"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("cortex-m-rt", "rt"))' -C metadata=b294529f9937865b -C extra-filename=-b294529f9937865b --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/build/nrf52833-pac-b294529f9937865b -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow`
   Compiling semver v0.9.0
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name semver --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/semver-0.9.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="default"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("ci", "default", "serde"))' -C metadata=423567d7225e184e -C extra-filename=-423567d7225e184e --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern semver_parser=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libsemver_parser-dbc537621bb14e63.rmeta --cap-lints allow`
     Running `/Users/l/Desktop/Projects/discovery-mb2/target/debug/build/cortex-m-e53d088258f5159b/build-script-build`
   Compiling rtt-target v0.5.0
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name rtt_target --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rtt-target-0.5.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=165ccec8c4ccec97 -C extra-filename=-165ccec8c4ccec97 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern critical_section=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcritical_section-bf56463bcb88eb17.rmeta --extern ufmt_write=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libufmt_write-3241a1f091de07de.rmeta --cap-lints allow -L /opt/homebrew/lib`
   Compiling rustc_version v0.2.3
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name rustc_version --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rustc_version-0.2.3/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=97da3156940f2577 -C extra-filename=-97da3156940f2577 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern semver=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libsemver-423567d7225e184e.rmeta --cap-lints allow`
     Running `/Users/l/Desktop/Projects/discovery-mb2/target/debug/build/proc-macro2-f6ef4d135727c03a/build-script-build`
     Running `/Users/l/Desktop/Projects/discovery-mb2/target/debug/build/cortex-m-rt-458da89186856eec/build-script-build`
   Compiling rtt-check v0.1.0 (/Users/l/Desktop/Projects/discovery-mb2/mdbook/src/03-setup)
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name build_script_build --edition=2021 mdbook/src/03-setup/build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=790d30195b4e8807 -C extra-filename=-790d30195b4e8807 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/build/rtt-check-790d30195b4e8807 -C incremental=/Users/l/Desktop/Projects/discovery-mb2/target/debug/incremental -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps`
   Compiling panic-rtt-target v0.1.3
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name panic_rtt_target --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/panic-rtt-target-0.1.3/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=af059f97f48befb2 -C extra-filename=-af059f97f48befb2 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern critical_section=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcritical_section-bf56463bcb88eb17.rmeta --extern rtt_target=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/librtt_target-165ccec8c4ccec97.rmeta --cap-lints allow -L /opt/homebrew/lib`
   Compiling bare-metal v0.2.5
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name build_script_build --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bare-metal-0.2.5/build.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="const-fn"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("const-fn"))' -C metadata=ac801ea6f128037e -C extra-filename=-ac801ea6f128037e --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/build/bare-metal-ac801ea6f128037e -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern rustc_version=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/librustc_version-97da3156940f2577.rlib --cap-lints allow`
     Running `/Users/l/Desktop/Projects/discovery-mb2/target/debug/build/bare-metal-ac801ea6f128037e/build-script-build`
     Running `/Users/l/Desktop/Projects/discovery-mb2/target/debug/build/nrf52833-pac-b294529f9937865b/build-script-build`
     Running `/Users/l/Desktop/Projects/discovery-mb2/target/debug/build/rtt-check-790d30195b4e8807/build-script-build`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name proc_macro2 --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.94/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="default"' --cfg 'feature="proc-macro"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("default", "nightly", "proc-macro", "span-locations"))' -C metadata=c39614365ce50007 -C extra-filename=-c39614365ce50007 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern unicode_ident=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libunicode_ident-394c647780ca9e46.rmeta --cap-lints allow --cfg wrap_proc_macro --check-cfg 'cfg(fuzzing)' --check-cfg 'cfg(no_is_available)' --check-cfg 'cfg(no_literal_byte_character)' --check-cfg 'cfg(no_literal_c_string)' --check-cfg 'cfg(no_source_text)' --check-cfg 'cfg(proc_macro_span)' --check-cfg 'cfg(procmacro2_backtrace)' --check-cfg 'cfg(procmacro2_nightly_testing)' --check-cfg 'cfg(procmacro2_semver_exempt)' --check-cfg 'cfg(randomize_layout)' --check-cfg 'cfg(span_locations)' --check-cfg 'cfg(super_unstable)' --check-cfg 'cfg(wrap_proc_macro)'`
   Compiling quote v1.0.40
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name quote --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/quote-1.0.40/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="default"' --cfg 'feature="proc-macro"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("default", "proc-macro"))' -C metadata=7dbd2aed41bda518 -C extra-filename=-7dbd2aed41bda518 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern proc_macro2=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libproc_macro2-c39614365ce50007.rmeta --cap-lints allow`
   Compiling syn v2.0.100
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name syn --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.100/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=42f319473b58e797 -C extra-filename=-42f319473b58e797 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern proc_macro2=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libproc_macro2-c39614365ce50007.rmeta --extern quote=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libquote-7dbd2aed41bda518.rmeta --extern unicode_ident=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libunicode_ident-394c647780ca9e46.rmeta --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name bare_metal --edition=2015 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bare-metal-0.2.5/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="const-fn"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("const-fn"))' -C metadata=bb4ddd4769569e7a -C extra-filename=-bb4ddd4769569e7a --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --cap-lints allow -L /opt/homebrew/lib`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name cortex_m --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cortex-m-0.7.7/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="critical-section"' --cfg 'feature="critical-section-single-core"' --cfg 'feature="inline-asm"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("cm7", "cm7-r0p1", "critical-section", "critical-section-single-core", "inline-asm", "linker-plugin-lto", "serde", "std"))' -C metadata=7e4c1c83c436d78c -C extra-filename=-7e4c1c83c436d78c --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern bare_metal=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libbare_metal-bb4ddd4769569e7a.rmeta --extern bitfield=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libbitfield-31a66970bd4c1761.rmeta --extern critical_section=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcritical_section-bf56463bcb88eb17.rmeta --extern embedded_hal=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libembedded_hal-894310fccd52fb65.rmeta --extern volatile_register=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libvolatile_register-a1f31706abbbe790.rmeta --cap-lints allow -L /opt/homebrew/lib -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/cortex-m-b90847053a3cf14d/out -l static=cortex-m --cfg cortex_m --cfg armv7m --cfg armv7em --cfg has_fpu`
   Compiling cortex-m-rt-macros v0.7.5
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name cortex_m_rt_macros --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cortex-m-rt-macros-0.7.5/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 -C split-debuginfo=unpacked --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=c2184089b5ec8825 -C extra-filename=-c2184089b5ec8825 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern proc_macro2=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libproc_macro2-c39614365ce50007.rlib --extern quote=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libquote-7dbd2aed41bda518.rlib --extern syn=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libsyn-42f319473b58e797.rlib --extern proc_macro --cap-lints allow`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name cortex_m_rt --edition=2021 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/cortex-m-rt-0.7.5/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("device", "paint-stack", "set-sp", "set-vtor", "zero-init-ram"))' -C metadata=703152696fea6e0d -C extra-filename=-703152696fea6e0d --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern cortex_m_rt_macros=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps/libcortex_m_rt_macros-c2184089b5ec8825.dylib --cap-lints allow -L /opt/homebrew/lib -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/cortex-m-rt-948c45809a3c53a5/out --cfg cortex_m --cfg armv7m --cfg has_fpu --check-cfg 'cfg(armv6m)' --check-cfg 'cfg(armv7m)' --check-cfg 'cfg(armv8m)' --check-cfg 'cfg(cortex_m)' --check-cfg 'cfg(has_fpu)'`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name nrf52833_pac --edition=2018 /Users/l/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nrf52833-pac-0.12.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="cortex-m-rt"' --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("cortex-m-rt", "rt"))' -C metadata=d79edec9fa1795c4 -C extra-filename=-d79edec9fa1795c4 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern cortex_m=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcortex_m-7e4c1c83c436d78c.rmeta --extern cortex_m_rt=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcortex_m_rt-703152696fea6e0d.rmeta --extern vcell=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libvcell-315eda1bcb95e0bd.rmeta --cap-lints allow -L /opt/homebrew/lib -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/cortex-m-b90847053a3cf14d/out -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/cortex-m-rt-948c45809a3c53a5/out`
     Running `/Users/l/.rustup/toolchains/stable-aarch64-apple-darwin/bin/rustc --crate-name rtt_check --edition=2021 mdbook/src/03-setup/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values())' -C metadata=f3cdaba145ef0018 -C extra-filename=-f3cdaba145ef0018 --out-dir /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps --target thumbv7em-none-eabihf -C incremental=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/incremental -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps -L dependency=/Users/l/Desktop/Projects/discovery-mb2/target/debug/deps --extern cortex_m=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcortex_m-7e4c1c83c436d78c.rlib --extern cortex_m_rt=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libcortex_m_rt-703152696fea6e0d.rlib --extern nrf52833_pac=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libnrf52833_pac-d79edec9fa1795c4.rlib --extern panic_rtt_target=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/libpanic_rtt_target-af059f97f48befb2.rlib --extern rtt_target=/Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/deps/librtt_target-165ccec8c4ccec97.rlib -L /opt/homebrew/lib -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/rtt-check-67de8d00463d13e7/out -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/cortex-m-b90847053a3cf14d/out -L /Users/l/Desktop/Projects/discovery-mb2/target/thumbv7em-none-eabihf/debug/build/cortex-m-rt-948c45809a3c53a5/out`
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.83s

I found a similar issue here rust-embedded/discovery#227. Not sure if these are the same issue.

[BartMassey]

For some reason I don't understand, rust-lld is not being used as the linker and link.x is not being linked against.

Please git pull again to make sure you have the latest bits, rustup update stable to make sure you have the latest compiler, then go to mdbook/src/03-setup and try cargo clean && cargo build again.

Sorry this is an ordeal; hopefully we will figure it out and add instructions to the book for future folks.

[huisedenanhai]

Please git pull again to make sure you have the latest bits, rustup update stable to make sure you have the latest compiler, then go to mdbook/src/03-setup and try cargo clean && cargo build again.

This does not solve the issue.

I dump detailed linker info by export RUSTC_LOG=rustc_codegen_ssa::back::link=info. rust-lld is actually used, but it says

INFO rustc_codegen_ssa::back::link linker stderr:
 rust-lld: warning: cannot find entry symbol _start; not setting start address
 INFO rustc_codegen_ssa::back::link linker stdout:

link.x is not being linked against.

I tried to add link-arg=-Tlink.x to .cargo/config.toml. The issue remains. From verbose log I found the link arg is not append to the linker command.

I finally solved the issue by adding the following line to build.rs.

println!("cargo:rustc-link-arg=-Tlink.x");

Now everything works. -Tlink.x is passed to rust-lld. .text section generated in output binary. Successfully see the Hello World log.

[BartMassey]

Thanks for figuring this out! I'll try to get things sorted out so that others don't have to go through this.

[ogkloo]

I had a similar issue and thought it'd be worth it to comment. MacOS/rustc 1.87.0.

Every example from the book runs just fine -- Within the book repo. This includes 03-setup, which builds and runs just fine without any tinkering. However, copying the examples out of the repo and attempting to build them gives this same error, which is resolved in the same way: Adding a build.rs to look for Tlink.x and memory.x (and copying memory.x into the directory) fixes it.

[sirhcel]

Every example from the book runs just fine -- Within the book repo.

Good to hear that and that's what I'm seeing with Rust 1.87.0, GCC 13.2 on macOS 15.5 here as well. Putting on the heretic hat: Are the examples supposed to work outside the repository at all? The book talks about either cloning the repository or getting a tarball of the entire one.

What's your usecase for that @huisedenanhai and @ogkloo?

Moving .cargo/cargo.toml to the individual example directories could be one way to allow the examples to be built an run an their own. But this comes at the cost of maintaining it all over the place instead of a single location.

[huisedenanhai]

@sirhcel Different from @ogkloo I encountered the issue when building the example inside the repo. But it has been some time so the issue may no longer exists with newer Rust. I haven't upgrade my local setup and verify that.

[ogkloo]

Putting on the heretic hat: Are the examples supposed to work outside the repository at all?

@sirhcel I feel like it's more useful if they do! If they aren't, maybe we could clarify somewhere early in the text that they don't work outside of the provided environment, and provide some instructions (at least for Linux) to set up an environment elsewhere.

I just think it's nice to understand how to set these things up and build them. I encountered the problem while poking around trying to work out what cargo embed was doing.

Moving .cargo/cargo.toml to the individual example directories could be one way to allow the examples to be built an run an their own.

Personally I like how the project is set up to build and don't think it needs to change. I think the easiest change would be to note this interaction in section 3.3.

[BartMassey]

Given that the only thing causing a problem is -Tlink.x, we should be able to get things to work both ways somehow. I've been talking with the REWG folks about this issue, and hopefully we'll figure something out very soon.

Thanks to all of you for your help with this!

[BartMassey]

We haven't forgotten about this, but I'm pretty stalled on it right now. The problems with automated search for linker scripts are deep and complicated: a fix that works for one environment then causes failure on another.

Somebody really needs to do the six-factor experiment: MacOS, Linux, Windows × in-book-repo, separate-repo, and try to find a solution that works for all. I don't have easy access to MacOS, and really don't have time to do the experiment right now.

Thanks for your patience and possible help.