https://bugs.kde.org/show_bug.cgi?id=490520

--- Comment #3 from Paul Floyd <pjfl...@wanadoo.fr> ---
I've been using LLVM compilers for several years without any issues.

Are you seeing configure passing this test:

# does the x86/amd64 assembler understand the LOOPNEL instruction?
# Note, this doesn't generate a C-level symbol.  It generates a
# automake-level symbol (BUILD_LOOPNEL_TESTS), used in test Makefile.am's
AC_MSG_CHECKING([if x86/amd64 assembler supports 'loopnel'])

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
  do {
      __asm__ __volatile__("1:  loopnel 1b\n");
  } while (0)
]])], [
  ac_have_as_loopnel=yes
  AC_MSG_RESULT([yes])
], [
  ac_have_as_loopnel=no
  AC_MSG_RESULT([no])
])

AM_CONDITIONAL([BUILD_LOOPNEL_TESTS], [test x$ac_have_as_loopnel = xyes])

and hence none/tests/amd64/Makefile gets a rule to build the loopnel test, but
then "make check" fails to build the loopnel testcase?

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