On 12.04.2017 21:30, Brian Brooks wrote: > The build is broken when using clang on ARM. -mcx16 is being passed to > clang when building natively on ARM. This combined with -Werror causes > the breakage. Fix it by skipping anything related to -mcx16 when not > building for x86-based architectures. See [1] for details. > > [1] https://lists.linaro.org/pipermail/lng-odp/2017-April/029684.html > > v2 > - Add more description to commit message (Dmitry) > > Signed-off-by: Brian Brooks <[email protected]> > --- > configure.ac | 30 ++++++++++++++++-------------- > 1 file changed, 16 insertions(+), 14 deletions(-)
Reviewed-by: Dmitry Eremin-Solenikov <[email protected]> > > diff --git a/configure.ac b/configure.ac > index 9320f360..d364b8dd 100644 > --- a/configure.ac > +++ b/configure.ac > @@ -303,20 +303,22 @@ ODP_CFLAGS="$ODP_CFLAGS -std=c99" > # Extra flags for example to suppress certain warning types > ODP_CFLAGS="$ODP_CFLAGS $ODP_CFLAGS_EXTRA" > > -######################################################################### > -# Check if compiler supports cmpxchng16 > -########################################################################## > -if test "${CC}" != "gcc" -o ${CC_VERSION_MAJOR} -ge 5; then > - my_save_cflags="$CFLAGS" > - > - CFLAGS=-mcx16 > - AC_MSG_CHECKING([whether CC supports -mcx16]) > - AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], > - [AC_MSG_RESULT([yes])] > - [ODP_CFLAGS="$ODP_CFLAGS $CFLAGS"], > - [AC_MSG_RESULT([no])] > - ) > - CFLAGS="$my_save_cflags" > +########################################################################## > +# Check if compiler supports cmpxchng16 on x86-based architectures > +########################################################################## > +if "${host}" == i?86* -o "${host}" == x86*; then > + if test "${CC}" != "gcc" -o ${CC_VERSION_MAJOR} -ge 5; then > + my_save_cflags="$CFLAGS" > + > + CFLAGS=-mcx16 > + AC_MSG_CHECKING([whether CC supports -mcx16]) > + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], > + [AC_MSG_RESULT([yes])] > + [ODP_CFLAGS="$ODP_CFLAGS $CFLAGS"], > + [AC_MSG_RESULT([no])] > + ) > + CFLAGS="$my_save_cflags" > + fi > fi > > ########################################################################## > -- With best wishes Dmitry
