python / python/cpython

Compiling static library with `-fPIC` throws error

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描述

Bug report

I'm compiling python as a static library to embed in my c++ shared library, and -fPIC is necessary to get it working!

compilation command: CFLAGS=-fPIC ./configure --enable-shared=no --enable-optimizations

the following error happens:

Objects/typeobject.c: In function ‘inherit_special’:
Objects/typeobject.c:5777:1: error: the control flow of function ‘inherit_special’ does not match its profile data (counter ‘arcs’) [-Werror=coverage-mismatch]
 5777 | inherit_special(PyTypeObject *type, PyTypeObject *base)
      | ^~~~~~~~~~~~~~~
Objects/typeobject.c:5777:1: error: the control flow of function ‘inherit_special’ does not match its profile data (counter ‘time_profiler’) [-Werror=coverage-mismatch]
Objects/typeobject.c: In function ‘object_set_class’:
Objects/typeobject.c:4774:1: error: the control flow of function ‘object_set_class’ does not match its profile data (counter ‘arcs’) [-Werror=coverage-mismatch]
 4774 | object_set_class(PyObject *self, PyObject *value, void *closure)
      | ^~~~~~~~~~~~~~~~
Objects/typeobject.c:4774:1: error: the control flow of function ‘object_set_class’ does not match its profile data (counter ‘time_profiler’) [-Werror=coverage-mismatch]
Objects/obmalloc.c:1449:1: warning: ‘always_inline’ function might not be inlinable [-Wattributes]
 1449 | arena_map_get(block *p, int create)
      | ^~~~~~~~~~~~~

if I remove the -fPIC it compiles fine!
edit: Just tried removing --enable-optimizations and it worked, but I think it should work with optimizations?

Your environment

  • CPython versions tested on: branch 3.11
  • Operating system and architecture: Manjaro Linux x64

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调研方向

在 CPython 3.11 上使用 CFLAGS=-fPIC ./configure --enable-shared=no --enable-optimizations 重现该问题,然后将其与不使用 -fPIC--enable-optimizations 时成功的构建进行比较。从 Objects/typeobject.c 中报告的失败和 Objects/obmalloc.c 中的警告开始;当带有 -fPIC 的优化静态构建完成时,即表示完成。

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评估

技术栈
cpp, python
领域
build-system, compilers
Issue 类型
缺陷
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4/5
预计耗时
3-5 天
活跃度
停滞
描述清晰度
基本清楚
新手友好度
38/100

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