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# Enable -fvisibility=hidden if using a gcc that supports it
OLD_CFLAGS="$CFLAGS"
AC_MSG_CHECKING([whether $CC supports -fvisibility=hidden])
VISIBILITY_CFLAGS="-fvisibility=hidden"
CFLAGS="$CFLAGS $VISIBILITY_CFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
[VISIBILITY_CFLAGS=""; AC_MSG_RESULT([no])]);
AC_SUBST(VISIBILITY_CFLAGS)
# Restore CFLAGS; VISIBILITY_CFLAGS are added to it where needed.
CFLAGS=$OLD_CFLAGS
AC_MSG_CHECKING(for GCC atomic builtins)
AC_LINK_IFELSE(
[AC_LANG_SOURCE(
[[int main() {
int v = 1;
__atomic_fetch_add(&v, 1, __ATOMIC_RELAXED);
__atomic_fetch_sub(&v, 1, __ATOMIC_RELAXED);
__atomic_store_n(&v, 1, __ATOMIC_RELAXED);
__atomic_load_n(&v, __ATOMIC_RELAXED);
return 0;
}
]])],
AC_MSG_RESULT(yes),
AC_MSG_RESULT(no)
echo "GCC-style __atomic builtins not supported by the compiler."
echo "Use newer version. For gcc > 4.7.0"
exit -1)
dnl Check whether -latomic is needed
use_libatomic=no
AC_MSG_CHECKING(whether -latomic is needed for 64-bit atomic built-ins)
AC_LINK_IFELSE(
[AC_LANG_SOURCE([[
static int loc;
int main(void)
{
int prev = __atomic_exchange_n(&loc, 7, __ATOMIC_RELAXED);
return 0;
}
]])],
[AC_MSG_RESULT(no)],
[AC_MSG_RESULT(yes)
AC_CHECK_LIB(
[atomic], [__atomic_exchange_8],
[use_libatomic=yes],
[AC_MSG_FAILURE([__atomic_exchange_8 is not available])])
])
AC_MSG_CHECKING(whether -latomic is needed for 128-bit atomic built-ins)
AC_LINK_IFELSE(
[AC_LANG_SOURCE([[
static __int128 loc;
int main(void)
{
__int128 prev;
prev = __atomic_exchange_n(&loc, 7, __ATOMIC_RELAXED);
return 0;
}
]])],
[AC_MSG_RESULT(no)],
[AC_MSG_RESULT(yes)
AC_CHECK_LIB(
[atomic], [__atomic_exchange_16],
[use_libatomic=yes],
[AC_MSG_CHECKING([cannot detect support for 128-bit atomics])])
])
if test "x$use_libatomic" = "xyes"; then
ATOMIC_LIBS="-latomic"
fi
AC_SUBST([ATOMIC_LIBS])
m4_include([platform/linux-generic/m4/odp_pthread.m4])
m4_include([platform/linux-generic/m4/odp_openssl.m4])
m4_include([platform/linux-generic/m4/odp_pcap.m4])
m4_include([platform/linux-generic/m4/odp_netmap.m4])
m4_include([platform/linux-generic/m4/odp_dpdk.m4])
m4_include([platform/linux-generic/m4/odp_schedule.m4])
AC_CONFIG_FILES([platform/linux-generic/Makefile
platform/linux-generic/include/odp/api/plat/static_inline.h])
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