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FAQ

Registry not found​

error: registry not found

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

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

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.

openssl-sys build failed​

When building DCR from source:

error: failed to run custom build command for openssl-sys

Solution: Install OpenSSL development headers:

# Ubuntu/Debian
sudo apt install libssl-dev

# Fedora
sudo dnf install openssl-devel

# macOS
brew install openssl

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.

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.