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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_CHECKING([__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$use_libatomic" = "xyes"; then
ATOMIC_LIBS="-latomic"
fi
AC_SUBST([ATOMIC_LIBS])
# linux-generic PCAP support is not relevant as the code doesn't use
# linux-generic pktio at all. And DPDK has its own PCAP support anyway
AM_CONDITIONAL([HAVE_PCAP], [false])
m4_include([platform/linux-dpdk/m4/odp_pthread.m4])
m4_include([platform/linux-dpdk/m4/odp_openssl.m4])
##########################################################################
# DPDK build variables
##########################################################################
DPDK_DRIVER_DIR=/usr/lib/$(uname -m)-linux-gnu
AS_CASE($host_cpu, [x86_64], [AM_CPPFLAGS="$AM_CPPFLAGS -msse4.2"])
if test ${DPDK_DEFAULT_DIR} = 1; then
AM_CPPFLAGS="$AM_CPPFLAGS -I/usr/include/dpdk"
else
DPDK_DRIVER_DIR=$SDK_INSTALL_PATH/lib
AM_CPPFLAGS="$AM_CPPFLAGS -I$SDK_INSTALL_PATH/include"
AM_LDFLAGS="$AM_LDFLAGS -L$SDK_INSTALL_PATH/lib"
fi
# Check if we should link against the static or dynamic DPDK library
AC_ARG_ENABLE([shared-dpdk],
[ --enable-shared-dpdk link against the shared DPDK library],
[if test "x$enableval" = "xyes"; then
shared_dpdk=true
fi])
AM_CONDITIONAL([SHARED_DPDK], [test x$shared_dpdk = xtrue])
##########################################################################
# Save and set temporary compilation flags
##########################################################################
OLD_LDFLAGS=$LDFLAGS
OLD_CPPFLAGS=$CPPFLAGS
LDFLAGS="$AM_LDFLAGS $LDFLAGS"
CPPFLAGS="$AM_CPPFLAGS $CPPFLAGS"
##########################################################################
# Check for DPDK availability
##########################################################################
AC_CHECK_HEADERS([rte_config.h], [],
[AC_MSG_FAILURE(["can't find DPDK headers"])])
AC_SEARCH_LIBS([rte_eal_init], [dpdk], [],
[AC_MSG_ERROR([DPDK libraries required])], [-ldl])
##########################################################################
# In case of static linking DPDK pmd drivers are not linked unless the
# --whole-archive option is used. No spaces are allowed between the
# --whole-arhive flags.
##########################################################################
if test "x$shared_dpdk" = "xtrue"; then
LIBS="$LIBS -Wl,--no-as-needed,-ldpdk,-as-needed -ldl -lm -lpcap"
else
DPDK_PMD=--whole-archive,
for filename in $DPDK_DRIVER_DIR/*.a; do
cur_driver=`echo $(basename "$filename" .a) | \
sed -n 's/^\(librte_pmd_\)/-lrte_pmd_/p' | sed -n 's/$/,/p'`
# rte_pmd_nfp has external dependencies which break linking
if test "$cur_driver" = "-lrte_pmd_nfp,"; then
echo "skip linking rte_pmd_nfp"
else
DPDK_PMD+=$cur_driver
fi
done
DPDK_PMD+=--no-whole-archive
LIBS="$LIBS -ldpdk -ldl -lm -lpcap"
AM_LDFLAGS="$AM_LDFLAGS -Wl,$DPDK_PMD"
fi
##########################################################################
# Restore old saved variables
##########################################################################
LDFLAGS=$OLD_LDFLAGS
CPPFLAGS=$OLD_CPPFLAGS
AC_CONFIG_FILES([platform/linux-dpdk/Makefile
platform/linux-dpdk/include/odp/api/plat/static_inline.h])
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