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刚刚编译了 clang-2.9 版本,它无法链接一个 hello world 示例。有错误:

crt1.o: No such file: No such file or directory

LLVM 配置为默认 + --enable-shared。具有相同选项的 llvm-2.8 构建在同一台机器上正常工作。

$ clang -v a.c
clang version 2.9 (tags/RELEASE_29/final)
Target: i386-pc-linux-gnu
Thread model: posix
 "/root/bin/clang" -cc1 -triple i386-pc-linux-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name a.c -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-cpu pentium4 -target-linker-version 2.18 -momit-leaf-frame-pointer -v -resource-dir /root/lib/clang/2.9 -ferror-limit 19 -fmessage-length 157 -fgnu-runtime -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/cc-2ueoYy.o -x c a.c
clang -cc1 version 2.9 based upon llvm 2.9 hosted on i386-pc-linux-gnu
ignoring nonexistent directory "/usr/local/include"
#include "..." search starts here:
#include <...> search starts here:
 /root/lib/clang/2.9/include
 /usr/include
End of search list.
a.c:1:1: warning: type specifier missing, defaults to 'int' [-Wimplicit-int]
main(){}
^~~~
1 warning generated.
 "/usr/bin/ld" --eh-frame-hdr -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o a.out crt1.o crti.o crtbegin.o -L -L/../../.. /tmp/cc-2ueoYy.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed crtend.o crtn.o
/usr/bin/ld: crt1.o: No such file: No such file or directory
clang: error: linker command failed with exit code 1 (use -v to see invocation)

同样的错误在这里http://permalink.gmane.org/gmane.comp.compilers.clang.devel/12101http://comments.gmane.org/gmane.comp.compilers.clang.devel/14269http ://permalink.gmane.org/gmane.comp.compilers.llvm.bugs/11352

与 llvm-2.8 比较时我可以学到什么——新版本尝试自己组装文件,旧版本调用 gcc 来执行组装和链接步骤。

拜托,这不是clang 链接器问题的重复,因为我无法编辑 LLVM 的源,所以接受的解决方案对我没有用。

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1 回答 1

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正如http://permalink.gmane.org/gmane.comp.compilers.llvm.bugs/11352 (llvm bug 8897) 所建议的,这是因为

gcc used to build clang is not in a standard location

或者

system gcc is not listed in the ToolChains.cpp GccVersions list:

./tools/clang/lib/Driver/ToolChains.cpp:  const char* GccVersions[] = {"4.5.2", "4.5.1", "4.5", "4.4.5", "4.4.4",
./tools/clang/lib/Driver/ToolChains.cpp-                               "4.4.3", "4.4", "4.3.4", "4.3.3", "4.3.2",
./tools/clang/lib/Driver/ToolChains.cpp-                               "4.3", "4.2.4", "4.2.3", "4.2.2", "4.2.1",
./tools/clang/lib/Driver/ToolChains.cpp-                               "4.2"};

这两种情况都适用于我的安装。

为了解决这个问题,我会尝试将我的 gcc 版本添加到 list 中GccVersions[]

这对我有帮助。

于 2011-04-12T15:12:02.467 回答