Disable jemalloc on Android (fixes sharkdp#636 and sharkdp#642)

Disabling jemalloc for Android fixes a build failure since jemalloc does
not build out of the box for that platform on older API versions.

Android started using jemalloc as the system allocator around 2014 for
most devices. In the latest Android version (11) the system allocator
has been switched to Scudo, which while not being jemalloc is modern and
actively maintained and should be used for most software on Android.

See:
- https://android-developers.googleblog.com/2020/06/system-hardening-in-android-11.html
- https://blog.nsogroup.com/a-tale-of-two-mallocs-on-android-libc-allocators-part-2-jemalloc/
- https://stackoverflow.com/questions/2266762/android-libc-version-and-malloc-implementation

CHANGELOG.md

@@ -5,6 +5,9 @@
 - Improved the usability of the time-based options, see #624 and #645 (@gorogoroumaru)
 
 ## Bugfixes
+
+- Disable jemalloc on Android, see #662
+
 ## Changes
 ## Other
 

Cargo.toml

@@ -61,7 +61,7 @@ libc = "0.2"
 # FIXME: Re-enable jemalloc on macOS
 # jemalloc is currently disabled on macOS due to a bug in jemalloc in combination with macOS
 # Catalina. See https://github.com/sharkdp/fd/issues/498 for details.
-[target.'cfg(all(not(windows), not(target_os = "macos"), not(target_env = "musl")))'.dependencies]
+[target.'cfg(all(not(windows), not(target_os = "android"), not(target_os = "macos"), not(target_env = "musl")))'.dependencies]
 jemallocator = "0.3.0"
 
 [dev-dependencies]

src/main.rs

@@ -34,7 +34,7 @@ use crate::regex_helper::pattern_has_uppercase_char;
 
 // We use jemalloc for performance reasons, see https://github.com/sharkdp/fd/pull/481
 // FIXME: re-enable jemalloc on macOS, see comment in Cargo.toml file for more infos
-#[cfg(all(not(windows), not(target_os = "macos"), not(target_env = "musl")))]
+#[cfg(all(not(windows), not(target_os = "android"), not(target_os = "macos"), not(target_env = "musl")))]
 #[global_allocator]
 static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;