gh-124191: Disable -Wconversion in enable safety (gh-124192)

Tools/build/.warningignore_macos

@@ -3,226 +3,7 @@
 # Keep lines sorted lexicographically to help avoid merge conflicts.
 # Format example:
 # /path/to/file (number of warnings in file)
-Include/internal/mimalloc/mimalloc/internal.h 4
+Modules/expat/siphash.h 7
-Include/internal/pycore_backoff.h 1
+Modules/expat/xmlparse.c 8
-Include/internal/pycore_dict.h 2
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-Modules/_asynciomodule.c 3
+Modules/expat/xmltok_impl.c 26
-Modules/_bisectmodule.c 2
-Modules/_bz2module.c 5
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-Python/tracemalloc.c 6

Tools/build/.warningignore_ubuntu

@@ -3,254 +3,4 @@
 # Keep lines sorted lexicographically to help avoid merge conflicts.
 # Format example:
 # /path/to/file (number of warnings in file)
-/home/runner/work/cpython/cpython/multissl/openssl/3.0.15/include/openssl/evp.h 2
+
-/home/runner/work/cpython/cpython/multissl/openssl/3.0.15/include/openssl/ssl.h 4
-/usr/include/tcl8.6/tclTomMathDecls.h 1
-Include/cpython/bytearrayobject.h 1
-Include/cpython/bytesobject.h 3
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configure

@@ -9771,45 +9771,6 @@ then :
 else $as_nop
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: -Wtrampolines not supported" >&5
 printf "%s\n" "$as_me: WARNING: -Wtrampolines not supported" >&2;}
-fi
-
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wconversion" >&5
-printf %s "checking whether C compiler accepts -Wconversion... " >&6; }
-if test ${ax_cv_check_cflags__Werror__Wconversion+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-
-  ax_check_save_flags=$CFLAGS
-  CFLAGS="$CFLAGS -Werror -Wconversion"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main (void)
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"
-then :
-  ax_cv_check_cflags__Werror__Wconversion=yes
-else $as_nop
-  ax_cv_check_cflags__Werror__Wconversion=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-  CFLAGS=$ax_check_save_flags
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ax_cv_check_cflags__Werror__Wconversion" >&5
-printf "%s\n" "$ax_cv_check_cflags__Werror__Wconversion" >&6; }
-if test "x$ax_cv_check_cflags__Werror__Wconversion" = xyes
-then :
-  CFLAGS_NODIST="$CFLAGS_NODIST -Wconversion"
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: -Wconversion not supported" >&5
-printf "%s\n" "$as_me: WARNING: -Wconversion not supported" >&2;}
 fi
 
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -Wimplicit-fallthrough" >&5

configure.ac

@@ -2514,7 +2514,6 @@ if test "$enable_safety" = "yes"
 then
   AX_CHECK_COMPILE_FLAG([-fstack-protector-strong], [CFLAGS_NODIST="$CFLAGS_NODIST -fstack-protector-strong"], [AC_MSG_WARN([-fstack-protector-strong not supported])], [-Werror])
   AX_CHECK_COMPILE_FLAG([-Wtrampolines], [CFLAGS_NODIST="$CFLAGS_NODIST -Wtrampolines"], [AC_MSG_WARN([-Wtrampolines not supported])], [-Werror])
-  AX_CHECK_COMPILE_FLAG([-Wconversion], [CFLAGS_NODIST="$CFLAGS_NODIST -Wconversion"], [AC_MSG_WARN([-Wconversion not supported])], [-Werror])
   AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [CFLAGS_NODIST="$CFLAGS_NODIST -Wimplicit-fallthrough"], [AC_MSG_WARN([-Wimplicit-fallthrough not supported])], [-Werror])
   AX_CHECK_COMPILE_FLAG([-Werror=format-security], [CFLAGS_NODIST="$CFLAGS_NODIST -Werror=format-security"], [AC_MSG_WARN([-Werror=format-security not supported])], [-Werror])
   AX_CHECK_COMPILE_FLAG([-Wbidi-chars=any], [CFLAGS_NODIST="$CFLAGS_NODIST -Wbidi-chars=any"], [AC_MSG_WARN([-Wbidi-chars=any not supported])], [-Werror])