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try to add a test for amzln 

the gcc7.2 in amazonlinux 2018.03 seems to fail with signed constants in
vector templates ... add a configure test

see https://github.com/jcupitt/libvips/issues/975
This commit is contained in:
John Cupitt 2018-05-14 17:14:42 +01:00
parent 18c50c3231
commit f6bbfe3148
1 changed files with 24 additions and 0 deletions
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24
configure.ac
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@ -416,6 +416,30 @@ if test x$have_vector_shuffle = x"yes"; then
have_vector_arith=no
])
AC_LANG_POP([C++])
fi
# gcc 7.2 seems to work, but then gets confused by signed constants in
# templates
if test x$have_vector_arith = x"yes"; then
AC_MSG_CHECKING([for C++ signed constants in vector templates])
AC_LANG_PUSH([C++])
AC_TRY_COMPILE([
typedef float v4f __attribute__((vector_size(4 * sizeof(float))));
template <typename T>
static void
h( v4f B )
{
v4f f;
f = -1 * B;
}
],[
],[
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
have_vector_arith=no
])
AC_LANG_POP([C++])
if test x$have_vector_arith = x"yes"; then
AC_DEFINE_UNQUOTED(HAVE_VECTOR_ARITH, 1,