Add an optional feature for 1.34.2 compatibility (#84)

miniz_oxide/Cargo.toml

@@ -29,3 +29,5 @@ compiler_builtins = { version = '0.1.2', optional = true }
 # Internal feature, only used when building as part of libstd, not part of the
 # stable interface of this crate.
 rustc-dep-of-std = ['core', 'alloc', 'compiler_builtins', 'adler/rustc-dep-of-std']
+# Use std instead of alloc. This should only be used for backwards compatibility.
+no_extern_crate_alloc = []

miniz_oxide/src/deflate/mod.rs

@@ -1,7 +1,7 @@
 //! This module contains functionality for compression.
 
-use alloc::vec;
-use alloc::vec::Vec;
+use crate::alloc::vec;
+use crate::alloc::vec::Vec;
 
 mod buffer;
 pub mod core;

miniz_oxide/src/inflate/mod.rs

@@ -2,9 +2,9 @@
 
 use ::core::cmp::min;
 use ::core::usize;
-use alloc::boxed::Box;
-use alloc::vec;
-use alloc::vec::Vec;
+use crate::alloc::boxed::Box;
+use crate::alloc::vec;
+use crate::alloc::vec::Vec;
 
 pub mod core;
 mod output_buffer;

miniz_oxide/src/inflate/stream.rs

@@ -1,7 +1,7 @@
 //! Extra streaming decompression functionality.
 //!
 //! As of now this is mainly inteded for use to build a higher-level wrapper.
-use alloc::boxed::Box;
+use crate::alloc::boxed::Box;
 use core::{cmp, mem};
 
 use crate::inflate::core::{decompress, inflate_flags, DecompressorOxide, TINFL_LZ_DICT_SIZE};

miniz_oxide/src/lib.rs

@@ -23,9 +23,12 @@
 
 #![allow(warnings)]
 #![forbid(unsafe_code)]
-#![no_std]
+#![cfg_attr(not(feature = "no_extern_crate_alloc"), no_std)]
 
+#[cfg(not(feature = "no_extern_crate_alloc"))]
 extern crate alloc;
+#[cfg(feature = "no_extern_crate_alloc")]
+use std as alloc;
 
 #[cfg(test)]
 extern crate std;