我有一个Rust项目，该项目使用cargo-xbuild使用目标规范交叉编译ARM Cortex-M7内核的内核，alloc和builder_builtins（请参见下文）。
到目前为止，我一直使用arm-none-eabi-gcc链接程序。效果很好。
由于ld.lld链接器已经足够成熟，我想切换到它。因此，我更改了目标规范。但是，我收到奇怪的错误消息，说链接器风味为gnu，并且它还会传递-nostartfiles，而该参数不能识别为参数。
[thumbv7em-none-eabi-gcc.json]
"abi-blacklist": [
"stdcall",
"fastcall",
"vectorcall",
"thiscall",
"win64",
"sysv64"
],
"arch": "arm",
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
"emit-debug-gdb-scripts": false,
"env": "",
"executables": true,
"is-builtin": true,
"linker": "arm-none-eabi-gcc",
"linker-flavor": "gcc",
"llvm-target": "thumbv7em-none-eabi",
"pre-link-args": {
"gcc" : [
"-mcpu=cortex-m4", "-mthumb",
"-nostartfiles", "-nostdlib",
"-Tlayout.ld", "-ffreestanding"
]
},
"max-atomic-width": 32,
"os": "none",
"panic-strategy": "abort",
"relocation-model": "static",
"target-c-int-width": "32",
"target-endian": "little",
"target-pointer-width": "32",
"vendor": ""
}
[thumbv7em-none-eabi-lld.json]
{
"abi-blacklist": [
"stdcall",
"fastcall",
"vectorcall",
"win64",
"sysv64"
],
"arch": "arm",
"cpu" : "cortex-m4",
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
"env": "",
"executables": true,
"linker-flavor": "ld.lld",
"llvm-target": "thumbv7em-none-eabi",
"max-atomic-width": 32,
"os": "none",
"panic-strategy": "abort",
"link-args": {
"ld.lld" : [
"-Tlayout.ld"]
},
"relocation-model": "static",
"target-endian": "little",
"target-pointer-width": "32",
"target-c-int-width": "32",
"vendor": ""
}
[错误]
Compiling stm32f3 v0.1.0 (file:///home/cylon2p0/stm32f3)
Running `rustc --crate-name stm32f3 src/main.rs --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=ecb4f772152518d9 -C extra-filename=-ecb4f772152518d9 --out-dir /home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps --target /home/cylon2p0/stm32f3/thumbv7em-none-eabi.json -C incremental=/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/incremental -L dependency=/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps -L dependency=/home/cylon2p0/stm32f3/target/debug/deps -C link-arg=-Tlayout.ld -C link-arg=-nostartfiles --sysroot /home/cylon2p0/stm32f3/target/sysroot`
error: linking with `lld` failed: exit code: 1======> ] 2/3: stm32f3
|
= note: "lld" "-flavor" "gnu" "-L" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib" "/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps/stm32f3-ecb4f772152518d9.1f6vm61vpmp6og7k.rcgu.o" "-o" "/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps/stm32f3-ecb4f772152518d9" "--gc-sections" "-L" "/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps" "-L" "/home/cylon2p0/stm32f3/target/debug/deps" "-L" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib" "-Bstatic" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib/libcore-08f9d20805b02a18.rlib" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib/libcompiler_builtins-898d35b0b97ca347.rlib" "-Tlayout.ld" "-nostartfiles" "-Bdynamic"
= note: lld: error: unknown argument: -nostartfiles
error: aborting due to previous error
error: Could not compile `stm32f3`.
Caused by:
process didn't exit successfully: `rustc --crate-name stm32f3 src/main.rs --crate-type bin --emit=dep-info,link -C debuginfo=2 -C metadata=ecb4f772152518d9 -C extra-filename=-ecb4f772152518d9 --out-dir /home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps --target /home/cylon2p0/stm32f3/thumbv7em-none-eabi.json -C incremental=/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/incremental -L dependency=/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps -L dependency=/home/cylon2p0/stm32f3/target/debug/deps -C link-arg=-Tlayout.ld -C link-arg=-nostartfiles --sysroot /home/cylon2p0/stm32f3/target/sysroot` (exit code: 101)
编辑：
删除-nostartfiles会导致分段错误。
"lld" "-flavor" "ld.lld" "-L" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib" "/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps/stm32f3-ecb4f772152518d9.1f6vm61vpmp6og7k.rcgu.o" "-o" "/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps/stm32f3-ecb4f772152518d9" "--gc-sections" "-L" "/home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps" "-L" "/home/cylon2p0/stm32f3/target/debug/deps" "-L" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib" "-Bstatic" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib/libcore-08f9d20805b02a18.rlib" "/home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib/libcompiler_builtins-898d35b0b97ca347.rlib" "-Tlayout.ld" "-Bdynamic"
LLVMSymbolizer: error reading file: No such file or directory
#0 0x00007f61706919cb llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/bin/../lib/libLLVM-6.0.so+0x8759cb)
#1 0x00007f617068f886 llvm::sys::RunSignalHandlers() (/usr/bin/../lib/libLLVM-6.0.so+0x873886)
#2 0x00007f617068f9d3 (/usr/bin/../lib/libLLVM-6.0.so+0x8739d3)
#3 0x00007f616ea2e8f0 __restore_rt (/usr/bin/../lib/libc.so.6+0x368f0)
#4 0x00007f616f6c280e lld::elf::ARMExidxSentinelSection::empty() const (/usr/bin/../lib/liblldELF.so.6+0x14e80e)
#5 0x00007f616f707bd6 (/usr/bin/../lib/liblldELF.so.6+0x193bd6)
#6 0x00007f616f725be5 (/usr/bin/../lib/liblldELF.so.6+0x1b1be5)
#7 0x00007f616f7286f0 void lld::elf::writeResult<llvm::object::ELFType<(llvm::support::endianness)1, false> >() (/usr/bin/../lib/liblldELF.so.6+0x1b46f0)
#8 0x00007f616f613180 void lld::elf::LinkerDriver::link<llvm::object::ELFType<(llvm::support::endianness)1, false> >(llvm::opt::InputArgList&) (/usr/bin/../lib/liblldELF.so.6+0x9f180)
#9 0x00007f616f5d2155 lld::elf::LinkerDriver::main(llvm::ArrayRef<char const*>, bool) (/usr/bin/../lib/liblldELF.so.6+0x5e155)
#10 0x00007f616f616598 lld::elf::link(llvm::ArrayRef<char const*>, bool, llvm::raw_ostream&) (/usr/bin/../lib/liblldELF.so.6+0xa2598)
#11 0x000055c3a5b673a6 (lld+0x13a6)
#12 0x00007f616ea1b06b __libc_start_main (/usr/bin/../lib/libc.so.6+0x2306b)
#13 0x000055c3a5b67c0a (lld+0x1c0a)
Stack dump:
0. Program arguments: lld -flavor ld.lld -L /home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib /home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps/stm32f3-ecb4f772152518d9.1f6vm61vpmp6og7k.rcgu.o -o /home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps/stm32f3-ecb4f772152518d9 --gc-sections -L /home/cylon2p0/stm32f3/target/thumbv7em-none-eabi/debug/deps -L /home/cylon2p0/stm32f3/target/debug/deps -L /home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib -Bstatic /home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib/libcore-08f9d20805b02a18.rlib /home/cylon2p0/stm32f3/target/sysroot/lib/rustlib/thumbv7em-none-eabi/lib/libcompiler_builtins-898d35b0b97ca347.rlib -Tlayout.ld -Bdynamic
Segmentation fault (core dumped)
答案 0 :(得分：0)
所以我发现了问题-它在链接脚本中。我为FLASH定义了从0x08000000开始的内存区域，然后在.text中试图将向量表定位到FLASH的开头，因此添加了语句. = 0。 LLD因该语句而崩溃，GCC则不然。