Don't add -g0 to Pybind11Extension if $CFLAGS sets -g. #3436
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henryiii
reviewed
Nov 4, 2021
Skylion007
approved these changes
Nov 4, 2021
On Unix, setuptools prepends $CFLAGS and $CPPFLAGS to the compiler flags (they always come before extra_compile_args and anything else; see distutils.sysconfig.customize_compiler). In practice, the environment variables are useful e.g. to quickly generate a debug build (e.g. by setting CFLAGS=-g), but Pybind11Extension currently unconditionally overwrites this with -g0. Instead, check the environment variables and only insert -g0 if not overridden by them.
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On Unix, setuptools prepends $CFLAGS and $CPPFLAGS to the compiler flags
(they always come before extra_compile_args and anything else; see
distutils.sysconfig.customize_compiler). In practice, the environment
variables are useful e.g. to quickly generate a debug build (e.g. by
setting CFLAGS=-g), but Pybind11Extension currently unconditionally
overwrites this with -g0.
Instead, check the environment variables and only insert -g0 if not
overridden by them.
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