Module requirements 

What a host needs before floDl will build, and the command that supplies it.

Each requirement is also checked at its point of use (util/http.rs for curl, util/archive.rs for unzip, flodl-sys/build.rs for the vendor headers). Those checks report one missing item at a time, at the moment it is needed. This module exists so fdl probe and fdl setup can report the whole set up front instead; the per-site checks remain as the backstop when neither was run.

The set is not absolute. A Docker build needs no C++ compiler and no vendor headers, since both live in the image, so callers request the set matching the build path in use.

Structs

ToolkitGap

A vendor toolkit gap on THIS box: the headers a --features <vendor> compile will not find, and the line that installs them.

Constants

CUDA_HEADERS

CUDA equivalent. The version placeholders are deliberate: the exact package name carries the toolkit version and we do not know which one the user wants.

ROCM_HEADERS

Vendor toolkit headers, as (header relative to an include dir, package that owns it).

Functions

header_reachable

Whether the C++ compiler can actually resolve #include <header>.

install_hint

The install line for a package list, contextual to the platform.

missing_headers

Vendor headers that are absent, as (header, package) pairs.

missing_host_tools

Host tools that are absent, as Debian package names.

packages_for

De-duplicated package list for a set of missing headers, in table order.

rpm_name

Debian package name in the RHEL-family spelling.

toolkit_gap

Resolve the toolkit gap for a vendor, None when the headers are all present — or when the vendor has no known toolkit layout, since guessing one produces a confidently wrong apt command.