8000 Enable subset of flags with low performance impact and no warnings · python/cpython@98d9ea0 · GitHub
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Enable subset of flags with low performance impact and no warnings
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‎configure

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‎configure.ac

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@@ -2451,6 +2451,18 @@ AS_VAR_IF([with_strict_overflow], [yes],
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[BASECFLAGS="$BASECFLAGS $STRICT_OVERFLOW_CFLAGS"],
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[BASECFLAGS="$BASECFLAGS $NO_STRICT_OVERFLOW_CFLAGS"])
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# Enable flags that warn and protect for potential security vulnerabilities.
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# These flags should be enabled by default for all builds.
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AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [BASECFLAGS="$BASECFLAGS -Wimplicit-fallthrough"], [AC_MSG_WARN([-Wimplicit-fallthrough not supported])])
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AX_CHECK_COMPILE_FLAG([-fstack-protector-strong], [BASECFLAGS="$BASECFLAGS -fstack-protector-strong"], [AC_MSG_WARN([-fstack-protector-strong not supported])])
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AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [BASECFLAGS="$BASECFLAGS -fno-strict-overflow"], [AC_MSG_WARN([-fno-strict-overflow not supported])])
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case $CC in
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*gcc*)
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# Add GCC-specific compiler flags
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AX_CHECK_COMPILE_FLAG([-Wtrampolines], [BASECFLAGS="$BASECFLAGS -Wtrampolines"], [AC_MSG_WARN([-Wtrampolines not supported])])
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esac
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case $GCC in
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yes)
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CFLAGS_NODIST="$CFLAGS_NODIST -std=c11"

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