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Track LLVM 15 changes.

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Per https://llvm.org/docs/OpaquePointers.html, support for non-opaque
pointers still exists and we can request that on our context.  We have
until LLVM 16 to move to opaque pointers, a much larger change.

Back-patch to 11, where LLVM support arrived.

Author: Thomas Munro <thomas.munro@gmail.com>
Author: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CAMHz58Sf_xncdyqsekoVsNeKcruKootLtVH6cYXVhhUR1oKPCg%40mail.gmail.com
This commit is contained in:
Thomas Munro
2022-10-19 22:18:26 +13:00
parent df3737a651
commit c2ae01f695
4 changed files with 113 additions and 0 deletions
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89
configure vendored
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@ -7481,6 +7481,95 @@ if test x"$pgac_cv_prog_CLANGXX_cxxflags__fexcess_precision_standard" = x"yes";
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CLANG} supports -Xclang -no-opaque-pointers, for BITCODE_CFLAGS" >&5
$as_echo_n "checking whether ${CLANG} supports -Xclang -no-opaque-pointers, for BITCODE_CFLAGS... " >&6; }
if ${pgac_cv_prog_CLANG_cflags__Xclang__no_opaque_pointers+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CFLAGS=$CFLAGS
pgac_save_CC=$CC
CC=${CLANG}
CFLAGS="${BITCODE_CFLAGS} -Xclang -no-opaque-pointers"
ac_save_c_werror_flag=$ac_c_werror_flag
ac_c_werror_flag=yes
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
pgac_cv_prog_CLANG_cflags__Xclang__no_opaque_pointers=yes
else
pgac_cv_prog_CLANG_cflags__Xclang__no_opaque_pointers=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_c_werror_flag=$ac_save_c_werror_flag
CFLAGS="$pgac_save_CFLAGS"
CC="$pgac_save_CC"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CLANG_cflags__Xclang__no_opaque_pointers" >&5
$as_echo "$pgac_cv_prog_CLANG_cflags__Xclang__no_opaque_pointers" >&6; }
if test x"$pgac_cv_prog_CLANG_cflags__Xclang__no_opaque_pointers" = x"yes"; then
BITCODE_CFLAGS="${BITCODE_CFLAGS} -Xclang -no-opaque-pointers"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CLANGXX} supports -Xclang -no-opaque-pointers, for BITCODE_CXXFLAGS" >&5
$as_echo_n "checking whether ${CLANGXX} supports -Xclang -no-opaque-pointers, for BITCODE_CXXFLAGS... " >&6; }
if ${pgac_cv_prog_CLANGXX_cxxflags__Xclang__no_opaque_pointers+:} false; then :
$as_echo_n "(cached) " >&6
else
pgac_save_CXXFLAGS=$CXXFLAGS
pgac_save_CXX=$CXX
CXX=${CLANGXX}
CXXFLAGS="${BITCODE_CXXFLAGS} -Xclang -no-opaque-pointers"
ac_save_cxx_werror_flag=$ac_cxx_werror_flag
ac_cxx_werror_flag=yes
ac_ext=cpp
ac_cpp='$CXXCPP $CPPFLAGS'
ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int
main ()
{
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_compile "$LINENO"; then :
pgac_cv_prog_CLANGXX_cxxflags__Xclang__no_opaque_pointers=yes
else
pgac_cv_prog_CLANGXX_cxxflags__Xclang__no_opaque_pointers=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
ac_compiler_gnu=$ac_cv_c_compiler_gnu
ac_cxx_werror_flag=$ac_save_cxx_werror_flag
CXXFLAGS="$pgac_save_CXXFLAGS"
CXX="$pgac_save_CXX"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $pgac_cv_prog_CLANGXX_cxxflags__Xclang__no_opaque_pointers" >&5
$as_echo "$pgac_cv_prog_CLANGXX_cxxflags__Xclang__no_opaque_pointers" >&6; }
if test x"$pgac_cv_prog_CLANGXX_cxxflags__Xclang__no_opaque_pointers" = x"yes"; then
BITCODE_CXXFLAGS="${BITCODE_CXXFLAGS} -Xclang -no-opaque-pointers"
fi
NOT_THE_CFLAGS=""
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CLANG} supports -Wunused-command-line-argument, for NOT_THE_CFLAGS" >&5
$as_echo_n "checking whether ${CLANG} supports -Wunused-command-line-argument, for NOT_THE_CFLAGS... " >&6; }