| Issue |
123848
|
| Summary |
[compiler-rt] circular dependency on libc
|
| Labels |
compiler-rt
|
| Assignees |
|
| Reporter |
nickdesaulniers
|
cc @petrhosek @frobtech @michaelrj-google @pcc @compnerd
Ideally, we'd be able to build the compiler builtins without depending on the libc (for purposes of bootstrapping a system). Right now, I observe build failures for the `builtins` ninja target when attempting to bootstrap such a sysroot:
- compiler-rt/lib/builtins/emutls.c depends on <stdlib.h>
- compiler-rt/lib/builtins/clear_cache.c depends on <assert.h>
- compiler-rt/lib/builtins/enable_execute_stack.c depends on <sys/mman.h>
- compiler-rt/lib/builtins/eprintf.c depends on <stdio.h>
- compiler-rt/lib/builtins/cpu_model/x86.c depends on <assert.h>
It looks like `COMPILER_RT_BAREMETAL_BUILD` can be unset to disable the addition of emutls.c, enable_execute_stack.c, and eprintf.c . (Ah @petrhosek has been here before, thanks @petrhosek !) AFAICT, there's currently no cmake option to skip building the rest.
Otherwise, it seems like we may have a circular dependency between the compiler builtins and the libc.
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