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FAQ

Registry not found​

error: registry not found

Solution: Make sure ~/.dcr/config.toml exists:

[registry.default]
url = "https://index.dcr.pm"
priority = 1

And check DCR_INDEX_PATH:

echo $DCR_INDEX_PATH

Compiler not found​

error: compiler not found

Solution: Ensure a compiler is installed and available in PATH.

which gcc
which clang

Or specify explicitly via [toolchain] in dcr.toml.

Ctrl+C during build​

DCR handles SIGINT: interrupts the current compilation and exits with non-zero code.

How to create a library?​

See Library Recipe.

How to cross-compile to Windows?​

See Cross-Compile Recipe.

How to create a multi-package project?​

See Workspace Recipe.

Bootloader / pure NASM OS image​

Use kind = "flat-bin" (NASM -f bin) and optional [archive] for a FAT disk image.

See OS-dev recipe.

How do I choose a download mirror?​

dcrup install uses --mirror auto by default and tries cf → gh → sf → ya.

dcrup install stable --mirror cf
export DCRUP_MIRROR=ya

Lock file​

dcr.lock is created during builds (dcr build) when registry dependencies are present. To force an update — delete dcr.lock and run dcr build.