0.65.0 build failing for android

[cahuja1992]

0.65.0 build is failing for android when compiling the crfsuite-rs NDK Version = android-ndk-r20

running: "aarch64-linux-android-gcc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-I" "c/include" "-Wall" "-Wextra" "-o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crfsuite.o" "-c" "c/crf/crfsuite.c" cargo:warning=c/crf/crfsuite.c:322:14: warning: unused function 'safe_strncpy' [-Wunused-function] cargo:warning=static char safe_strncpy(char dst, const char *src, size_t n) cargo:warning= ^ cargo:warning=1 warning generated. exit code: 0 AR_aarch64-linux-android = None AR_aarch64_linux_android = None TARGET_AR = None AR = None running: "aarch64-linux-android-ar" "crs" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/libcrfsuite.a" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/lbfgs/lbfgs.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/cqdb/lookup3.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/cqdb/cqdb.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/dictionary.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/logging.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/params.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/quark.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/rumavl.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/dataset.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/holdout.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/train_arow.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/train_averaged_perceptron.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/train_l2sgd.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/train_lbfgs.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/train_passive_aggressive.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crf1d_context.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crf1d_model.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crf1d_feature.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crf1d_encode.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crf1d_tag.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crfsuite_train.o" "/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out/c/crf/crfsuite.o" exit code: 0 cargo:rustc-link-lib=static=crfsuite cargo:rustc-link-search=native=/home/cahuja/snips/snips-nlu-rs-0.65.0/target/aarch64-linux-android/debug/build/crfsuite-sys-68380cbf5474de65/out

--- stderr clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files clang80: error: no input files thread 'main' panicked at 'called Result::unwrap() on an Err value: Error(Msg("You must either define a TARGET_SYSROOT or use Dinghy to build your project."), State { next_error: None })', src/libcore/result.rs:997:5 stack backtrace: 0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39 1: std::sys_common::backtrace::_print at src/libstd/sys_common/backtrace.rs:71 2: std::panicking::default_hook::{{closure}} at src/libstd/sys_common/backtrace.rs:59 at src/libstd/panicking.rs:197 3: std::panicking::default_hook at src/libstd/panicking.rs:211 4: std::panicking::rust_panic_with_hook at src/libstd/panicking.rs:474 5: std::panicking::continue_panic_fmt at src/libstd/panicking.rs:381 6: rust_begin_unwind at src/libstd/panicking.rs:308 7: core::panicking::panic_fmt at src/libcore/panicking.rs:85 8: core::result::unwrap_failed at /rustc/3c235d5600393dfe6c36eeed34042efad8d4f26e/src/libcore/macros.rs:18 9: core::result::Result<T,E>::unwrap at /rustc/3c235d5600393dfe6c36eeed34042efad8d4f26e/src/libcore/result.rs:798 10: build_script_build::main at ./build.rs:55 11: std::rt::lang_start::{{closure}} at /rustc/3c235d5600393dfe6c36eeed34042efad8d4f26e/src/libstd/rt.rs:64 12: std::panicking::try::do_call at src/libstd/rt.rs:49 at src/libstd/panicking.rs:293 13: __rust_maybe_catch_panic at src/libpanic_unwind/lib.rs:87 14: std::rt::lang_start_internal at src/libstd/panicking.rs:272 at src/libstd/panic.rs:388 at src/libstd/rt.rs:48 15: std::rt::lang_start at /rustc/3c235d5600393dfe6c36eeed34042efad8d4f26e/src/libstd/rt.rs:64 16: main 17: __libc_start_main 18: _start