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bpo-35257: Avoid leaking LTO linker flags into distutils (GH-10900)

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When compiling 3rd party C extensions, the linker flags used by the
compiler for the interpreter and the stdlib modules, will get
leaked into distutils. In order to avoid that, the PY_CORE_LDFLAGS
and PY_LDFLAGS_NODIST are introduced to keep those flags separated.
This commit is contained in:
stratakis 2018-12-19 18:19:01 +01:00 • committed by Victor Stinner
parent 55cc34500e
commit cf10a750f4
8 changed files with 38 additions and 18 deletions
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15
setup.py
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@ -18,11 +18,16 @@ from distutils.spawn import find_executable
cross_compiling = "_PYTHON_HOST_PLATFORM" in os.environ
# Add special CFLAGS reserved for building the interpreter and the stdlib
# modules (Issue #21121).
cflags = sysconfig.get_config_var('CFLAGS')
py_cflags_nodist = sysconfig.get_config_var('PY_CFLAGS_NODIST')
sysconfig.get_config_vars()['CFLAGS'] = cflags + ' ' + py_cflags_nodist
# Set common compiler and linker flags derived from the Makefile,
# reserved for building the interpreter and the stdlib modules.
# See bpo-21121 and bpo-35257
def set_compiler_flags(compiler_flags, compiler_py_flags_nodist):
flags = sysconfig.get_config_var(compiler_flags)
py_flags_nodist = sysconfig.get_config_var(compiler_py_flags_nodist)
sysconfig.get_config_vars()[compiler_flags] = flags + ' ' + py_flags_nodist
set_compiler_flags('CFLAGS', 'PY_CFLAGS_NODIST')
set_compiler_flags('LDFLAGS', 'PY_LDFLAGS_NODIST')
class Dummy:
"""Hack for parallel build"""