2
.json 파일을 "linker-flavor":"gcc"으로 작성하여 this answer을 사용하려고합니다. 내 전체 대상 .json 파일은 다음과 같습니다화물이 빈 ELF 파일을 만듭니다
$ cargo build --release -v
Compiling core v0.1.0 (https://github.com/gergoerdi/rust-avr-libcore-mini?rev=adda44aa91ac517aab6915447592ee4cad26564c#adda44aa)
Running `rustc --crate-name core /home/cactus/.cargo/git/checkouts/rust-avr-libcore-mini-37e279d93a70b45a/adda44a/src/lib.rs --crate-type lib --emit=dep-info,link -C opt-level=3 -C metadata=655bb622dd229da9 -C extra-filename=-655bb622dd229da9 --out-dir /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps --target avr-atmega328p -L dependency=/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps -L dependency=/home/cactus/prog/rust/avr/chip8-avr/target/release/deps --cap-lints allow`
Compiling chip8-engine v0.1.0 (https://github.com/gergoerdi/rust-avr-chip8-engine?rev=c6f88737bae4dae0bd6c5c2bbc73737e6dfadfcd#c6f88737)
Running `rustc --crate-name chip8_engine /home/cactus/.cargo/git/checkouts/rust-avr-chip8-engine-4bce60f3f178d33a/c6f8873/src/lib.rs --crate-type lib --emit=dep-info,link -C opt-level=3 -C metadata=2197ff1f15f697c9 -C extra-filename=-2197ff1f15f697c9 --out-dir /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps --target avr-atmega328p -L dependency=/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps -L dependency=/home/cactus/prog/rust/avr/chip8-avr/target/release/deps --extern core=/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libcore-655bb622dd229da9.rlib --cap-lints allow`
Compiling chip8-avr v0.1.0 (file:///home/cactus/prog/rust/avr/chip8-avr)
Running `rustc --crate-name chip8_avr src/main.rs --crate-type bin --emit=dep-info,link -C opt-level=3 -C metadata=014a8fed19cbc611 -C extra-filename=-014a8fed19cbc611 --out-dir /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps --target avr-atmega328p -L dependency=/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps -L dependency=/home/cactus/prog/rust/avr/chip8-avr/target/release/deps --extern chip8_engine=/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libchip8_engine-2197ff1f15f697c9.rlib --extern core=/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libcore-655bb622dd229da9.rlib`
Finished release [optimized] target(s) in 15.99 secs
그러나, 결과 ELF 파일의 .text 섹션이 비어 : 그래서
$ avr-objdump -h target/avr-atmega328p/release/chip8-avr.elf
target/avr-atmega328p/release/chip8-avr.elf: file format elf32-avr
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 00000000 00000000 00000000 00000074 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
1 .data 00000000 00800060 00000000 00000074 2**0
CONTENTS, ALLOC, LOAD, DATA
2 .stab 0000012c 00000000 00000000 00000074 2**2
CONTENTS, READONLY, DEBUGGING
3 .stabstr 0000005d 00000000 00000000 000001a0 2**0
CONTENTS, READONLY, DEBUGGING
4 .comment 00000011 00000000 00000000 000001fd 2**0
CONTENTS, READONLY
이와 cargo build을 실행
{
"llvm-target": "avr-atmel-none",
"cpu": "atmega328p",
"target-endian": "little",
"target-pointer-width": "16",
"os": "none",
"target-env": "gnu",
"target-vendor": "unknown",
"arch": "avr",
"data-layout": "e-p:16:16:16-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-n8",
"executables": true,
"linker": "avr-gcc",
"linker-flavor": "gcc",
"pre-link-args": {
"gcc": ["-Os -mmcu=atmega328p"]
},
"exe-suffix": ".elf",
"post-link-args": {
"gcc": ["-Wl,--gc-sections"]
},
"no-default-libraries": false
}
가 오류 메시지없이 종료 무슨 일이 일어나고 있는지 알기 위해 내 avr-gcc 을 sma ll 쉘 스크립트는 실행 파일에 전달하기 전에 인수를 기록합니다. 나는 동일한 환경 변수를 수동으로 동일한 명령을 실행하면
/usr/bin/avr-gcc -Os -mmcu=atmega328p \
-L /home/cactus/prog/rust/rust-avr/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/avr-atmega328p/lib \
/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-014a8fed19cbc611.0.o \
-o /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-014a8fed19cbc611.elf \
-Wl,--gc-sections \
-L /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps -L /home/cactus/prog/rust/avr/chip8-avr/target/release/deps -L /home/cactus/prog/rust/rust-avr/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/avr-atmega328p/lib \
-Wl,-Bstatic /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libchip8_engine-2197ff1f15f697c9.rlib \
/home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libcore-655bb622dd229da9.rlib \
-Wl,-Bdynamic -Wl,--gc-sections
, 내가 얻을 :
이
은/cargo
rustc가 연결을 수행 할 다음 명령 줄을 실행하려고 저를 보여줍니다 와 좋은 ELF 파일이 올바른 내용은 (는
.text 섹션이 비어 있지 않은지주의) :
$ /usr/bin/avr-gcc -Os -mmcu=atmega328p -L /home/cactus/prog/rust/rust-avr/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/avr-atmega328p/lib /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-014a8fed19cbc611.0.o -o /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/chip8_avr-014a8fed19cbc611.elf -Wl,--gc-sections -L /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps -L /home/cactus/prog/rust/avr/chip8-avr/target/release/deps -L /home/cactus/prog/rust/rust-avr/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/avr-atmega328p/lib -Wl,-Bstatic /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libchip8_engine-2197ff1f15f697c9.rlib /home/cactus/prog/rust/avr/chip8-avr/target/avr-atmega328p/release/deps/libcore-655bb622dd229da9.rlib -Wl,-Bdynamic -Wl,--gc-sections
$ avr-objdump -h target/avr-atmega328p/release/deps/chip8_avr-014a8fed19cbc611.elf
target/avr-atmega328p/release/deps/chip8_avr-014a8fed19cbc611.elf: file format elf32-avr
Sections:
Idx Name Size VMA LMA File off Algn
0 .data 0000020e 00800100 00001a56 00001af0 2**4
CONTENTS, ALLOC, LOAD, DATA
1 .text 00001a56 00000000 00000000 00000094 2**1
CONTENTS, ALLOC, LOAD, READONLY, CODE
2 .bss 000001fa 0080030e 0080030e 00001cfe 2**0
ALLOC
3 .stab 000007ec 00000000 00000000 00001d00 2**2
CONTENTS, READONLY, DEBUGGING
4 .stabstr 000000b0 00000000 00000000 000024ec 2**0
CONTENTS, READONLY, DEBUGGING
5 .comment 00000011 00000000 00000000 0000259c 2**0
CONTENTS, READONLY
을 왜 cargo silentl을한다 y 쉘에서 같은 명령을 실행하면 유효한 ELF 파일이 만들어지면서 무의미한 빈 ELF 파일이 생성됩니까?