diff options
Diffstat (limited to 'platform/linux-dpdk/m4/configure.m4')
| -rw-r--r-- | platform/linux-dpdk/m4/configure.m4 | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/platform/linux-dpdk/m4/configure.m4 b/platform/linux-dpdk/m4/configure.m4 new file mode 100644 index 000000000..230ef6eff --- /dev/null +++ b/platform/linux-dpdk/m4/configure.m4 @@ -0,0 +1,152 @@ +# 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]) |