bpo-35351: Pass link time optimization flags to CFLAGS_NODIST (GH-10797)
When using link time optimizations, the -flto flag is passed to BASECFLAGS, which makes it propagate to distutils. Those flags should be reserved for the interpreter and the stdlib extension modules only, thus moving those flags to CFLAGS_NODIST.
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@ -0,0 +1,2 @@
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When building Python with clang and LTO, LTO flags are no longer passed into
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CFLAGS to build third-party C extensions through distutils.
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@ -6626,7 +6626,7 @@ $as_echo "$as_me: llvm-ar found via xcrun: ${LLVM_AR}" >&6;}
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LTOFLAGS="$LTOFLAGS -g"
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fi
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BASECFLAGS="$BASECFLAGS $LTOFLAGS"
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CFLAGS_NODIST="$CFLAGS_NODIST $LTOFLAGS"
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LDFLAGS="$LDFLAGS $LTOFLAGS"
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fi
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@ -1357,7 +1357,7 @@ if test "$Py_LTO" = 'true' ; then
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LTOFLAGS="$LTOFLAGS -g"
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fi
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BASECFLAGS="$BASECFLAGS $LTOFLAGS"
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CFLAGS_NODIST="$CFLAGS_NODIST $LTOFLAGS"
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LDFLAGS="$LDFLAGS $LTOFLAGS"
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fi
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