SOURCE_PREFIX_MAP

• set by a build-tool
• for mapping build paths
• honoured by GCC and every build tool that generates build-paths
• how to support multiple mappings

one or multiple mappings?

• multiple is better, allows for more intuitive overrides by child processes

env variable preferred over cli

separator character, space or newline?

how to apply the mappings when eventually set?

• multiple ordered mappings, child build processes append to this map (to the end)
• child build tools apply the mapping last to first

the exact format of the envvar

• expressings multiple paths into a single string is hard
• “common things easy, uncommon things possible”

TODO:

• (infinity0, doko) research passing newlines through shell, m4, autoconf
• look how gdb parse and loads symbol paths to source code paths