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rust/compiler/rustc_codegen_gcc/doc/errors.md

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Common errors

This file lists errors that were encountered and how to fix them.

failed to build archive error

When you get this error:

error: failed to build archive: failed to open object file: No such file or directory (os error 2)

That can be caused by the fact that you try to compile with lto = "fat", but you didn't compile the sysroot with LTO. (Not sure if that's the reason since I cannot reproduce anymore. Maybe it happened when forgetting setting FAT_LTO.)

ld: cannot find crtbegin.o

When compiling an executable with libgccijt, if setting the *LIBRARY_PATH variables to the install directory, you will get the following errors:

ld: cannot find crtbegin.o: No such file or directory
ld: cannot find -lgcc: No such file or directory
ld: cannot find -lgcc: No such file or directory
libgccjit.so: error: error invoking gcc driver

To fix this, set the variables to gcc-build/build/gcc.