jflib-gpu 0.1.0

GPU access for JFLib: an explicit API over Vulkan and WebGPU
Documentation 
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// gpu's build script: a program with std (feature std) on Linux is a glibc program (plat's
// build.rs), so Vulkan comes through the system's dynamic linker (--cfg jfgui_glibc), as in
// JFLib's own glibc build.
use std::env;

fn main() {
    println!("cargo::rerun-if-changed=build.rs");
    let std = env::var_os("CARGO_FEATURE_STD").is_some();
    let os = env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
    let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap_or_default();
    if std && os == "linux" {
        if target_env == "gnu" {
            println!("cargo::rustc-cfg=jfgui_glibc");
        } else {
            println!("cargo::error=a JFLib program with std links against glibc on Linux: build it for x86_64-unknown-linux-gnu, not {}",
                     env::var("TARGET").unwrap_or_default());
        }
    }
}