Habitat Package Wrappers

This crate contains utility binaries that are used by wrapper scripts in various habitat packages.

hab-ld-wrapper

An argument processor for parsing and managing arguments passed to the system linker 'ld'. It offers the following features:

• Supports file-based parameter expansion using arguments prefixed with @
• Handles all static and dynamic linking flags, such as -Bstatic, -Bdynamic, and their variants
• Supports --push-state and --pop-state linker flags
• Supports --as-needed and --no-as-needed flags, preventing rpath entries addition if an --as-needed library isn't specified as a runtime dependency
• Adds library folders from the same package to rpaths of linked binaries when necessary

Upcoming Features

• Support for --copy-dt-needed and --no-copy-dt-needed flags to recursively read ELF libraries and add rpath entries

Environment Variables

Variable	Description
HAB_DEBUG	Outputs debug information to stderr for debugging purposes
HAB_DEBUG_LOG_FILE	Writes debug information to specified file instead of stderr. This prevents it from breaking certain autoconf checks
HAB_DYNAMIC_LINKER	Specifies the dynamic linker to use when creating executables with shared libraries
HAB_LD_RUN_PATH	A list of directories containing runtime libraries, separated by ':'; also serves as a hint for including rpath entries for --as-needed libraries
HAB_ENFORCE_PURITY	Filters out all impure paths passed to the linker when set to '1'
PREFIX	The installation folder for the current package being built
TMP, TMPDIR, TEMP, TEMPDIR	Temporary directory folders

By configuring these environment variables, you can easily customize the behavior of the hab-ld-wrapper to better suit your habitat package's requirements.

hab-cc-wrapper

An argument processor for parsing and managing arguments passed to the C compiler. It offers the following features:

• Allows the use of a specific linker binary
• Ensures correct application of various compiler options with specific C and C++ standard libraries

Environment Variables

Variable	Description
HAB_DEBUG	Outputs debug information to stderr for debugging purposes
HAB_DEBUG_LOG_FILE	Writes debug information to specified file instead of stderr. This prevents it from breaking certain autoconf checks
HAB_CC_EXECUTABLE_NAME	Specifies the name of the binary being wrapped; used to determine if a C or C++ compiler is in use
HAB_LD_BIN	Indicates the path to the desired linker binary
HAB_C_START_FILES	Specifies the path to C start files
HAB_C_STD_LIBS	A list of C standard library directories, separated by ':'
HAB_C_STD_HEADERS	A list of C standard header directories, separated by ':'
HAB_CXX_STD_LIBS	A list of C++ standard library directories, separated by ':'
HAB_CXX_STD_HEADERS	A list of C++ standard header directories, separated by ':'

By configuring these environment variables, you can easily customize the behavior of the hab-cc-wrapper to suit your habitat package's requirements.