From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-f173.google.com (mail-lb0-f173.google.com [209.85.217.173]) by dpdk.org (Postfix) with ESMTP id 903ECDE0 for ; Sat, 11 Jan 2014 00:41:42 +0100 (CET) Received: by mail-lb0-f173.google.com with SMTP id y6so1950284lbh.18 for ; Fri, 10 Jan 2014 15:42:54 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=XgoiQnZBNvgngGwpVSeiv5sYuTOJX2ihLrd4bhrxXKg=; b=daJUrybGIz0By4sQJvZkSvr96K2nxrb6CRhXza8qU/CaNbFQypAJ/R2a81cfuGVUi5 busm/c6Ulkk3j51ZLX04qAO6/sVQRXqPO7oZ6y4+uM5XZ0LcKOIyso6ceamaucf+q8qh 48grpHnw9GdxrolFm/ypH94L0pPxye3bphJ5HTdCPY41wTwuhWA/TvBPz17z7FYAnVjZ 7BRFL5L7K1mXmJkNbER0uoQeh1q//+lahVhJfBLwnbDEx1ekiKu+CQzwfamdYdZ6Jw+G 74F5HA1d3904Oxv8jfrf2o0yt2j4G4JawOfFhUH5PQRrXcxcXb8Gq7WTPgGXtRB56Z2q cZQQ== X-Gm-Message-State: ALoCoQkhvNQn2hjgYJTu3eO8lNRlhm0xE6F1bhh726jxBTZo97r3YM6QOLiH65drJdYZftEDEYlS MIME-Version: 1.0 X-Received: by 10.112.144.69 with SMTP id sk5mr4634681lbb.44.1389397374749; Fri, 10 Jan 2014 15:42:54 -0800 (PST) Received: by 10.112.137.34 with HTTP; Fri, 10 Jan 2014 15:42:54 -0800 (PST) In-Reply-To: References: Date: Fri, 10 Jan 2014 15:42:54 -0800 Message-ID: From: Dan Kan To: Hamid Ramazani Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Cc: "dev@dpdk.org" Subject: Re: [dpdk-dev] Useful: Simple C++ program & Makefile X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Jan 2014 23:41:43 -0000 I forgot to add that you will also need to add -D__STDC_LIMIT_MACROS because C99 standard specifies that limits such as INT8_MAX should only be defined if explicitly requested. Also with g++, you can no longer use non-trivial designated initializers which are used extensively throughout dpdk sample apps. For example, static const struct rte_eth_rxconf rx_conf = { .rx_thresh = { .pthresh = RX_PTHRESH, .hthresh = RX_HTHRESH, .wthresh = RX_WTHRESH, }, .rx_free_thresh = 32, }; Basically, use gcc to build the dpdk libraries. Then, use g++ to build your own code and link against the built libraries. Dan On Fri, Jan 10, 2014 at 12:19 PM, Dan Kan wrote: > Hamid, > I'm in the same situation as you in which I would like to write most of > the application logic in C++. I was able to use CC=g++ by slightly > modifying the makefiles in mk. I replaced all occurrences of "%.c" with > "%.cc" using the following command. > > find . -name "*.mk" -exec sed -i 's/%\.c\([^[:alpha:]]\)/%\.cc\1/g' {} \; > > I also remove some warning flags as errors. > > Here are the diffs: > > diff -r mk/internal/rte.compile-pre.mk ../temp/dpdk-1.5.1r2/mk/internal/ > rte.compile-pre.mk > 39c39 > < src2obj = $(strip $(patsubst %.cc,%.o,\ > --- > > src2obj = $(strip $(patsubst %.c,%.o,\ > 48c48 > < src2dep = $(strip $(call dotfile,$(patsubst %.cc,%.o.d, \ > --- > > src2dep = $(strip $(call dotfile,$(patsubst %.c,%.o.d, \ > 53c53 > < src2cmd = $(strip $(call dotfile,$(patsubst %.cc,%.o.cmd, \ > --- > > src2cmd = $(strip $(call dotfile,$(patsubst %.c,%.o.cmd, \ > 125c125 > < %.o: %.cc $$(wildcard $$(dep_$$@)) $$(DEP_$$(@)) FORCE > --- > > %.o: %.c $$(wildcard $$(dep_$$@)) $$(DEP_$$(@)) FORCE > diff -r mk/rte.module.mk ../temp/dpdk-1.5.1r2/mk/rte.module.mk > 36,37c36,37 > < ifneq ($(MODULE),$(notdir $(SRCS-y:%.cc=%))) > < $(MODULE)-objs += $(notdir $(SRCS-y:%.cc=%.o)) > --- > > ifneq ($(MODULE),$(notdir $(SRCS-y:%.c=%))) > > $(MODULE)-objs += $(notdir $(SRCS-y:%.c=%.o)) > diff -r mk/toolchain/gcc/rte.vars.mk../temp/dpdk-1.5.1r2/mk/toolchain/gcc/ > rte.vars.mk > 71,73c71,73 > < WERROR_FLAGS := -W -Wall -Werror > < WERROR_FLAGS += -Wmissing-declarations -Wpointer-arith > < WERROR_FLAGS += -Wcast-align -Wcast-qual > --- > > WERROR_FLAGS := -W -Wall -Werror -Wstrict-prototypes -Wmissing-prototypes > > WERROR_FLAGS += -Wmissing-declarations -Wold-style-definition > -Wpointer-arith > > WERROR_FLAGS += -Wcast-align -Wnested-externs -Wcast-qual > > > Dan > > > On Thu, Jan 9, 2014 at 10:30 PM, Hamid Ramazani wrote: > >> > I don't exactly know what is needed for C++. Please keep us informed. >> >> Hey Thomas, >> >> I've attached a simple program (main.cpp main.h and Makefile) that has >> a C++ class and just prints some messages in the output. >> Despite the fact that it's working fine, I'm sure the Makefile could >> be written much better; Maybe I made it completer in future. >> >> All the Best, >> --Hamid >> >> On 1/3/14, Thomas Monjalon wrote: >> > Hello, >> > >> > 03/01/2014 11:48, Hamid Ramazani : >> >> eal_timer.c:(.text+0x42c): undefined reference to `clock_gettime' >> > >> > From "man clock_gettime": >> > Link with -lrt (only for glibc versions before 2.17). >> > >> >> g++ -m64 -pthread -march=native -DRTE_MACHINE_CPUFLAG_SSE >> >> -DRTE_MACHINE_CPUFLAG_SSE2 -DRTE_MACHINE_CPUFLAG_SSSE3 >> >> >> -DRTE_COMPILE_TIME_CPUFLAGS=RTE_CPUFLAG_SSE,RTE_CPUFLAG_SSE2,RTE_CPUFLAG_SS >> >> SE3 -I/home/hamid/dpdk/dpdk-1.5.1r1/examples/sample/build/include >> >> -I/home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/include >> >> -include >> >> >> /home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/include/rte_conf >> >> ig.h -O3 -W -Wall -Werror -Wmissing-declarations -Wpointer-arith >> >> -Wcast-align -Wcast-qual -Wformat-nonliteral -Wformat-security -Wundef >> >> -Wwrite-strings -Wl,-melf_x86_64 -Wl,-export-dynamic sample.cpp -o >> >> sample -Wl,-L/home/hamid/dpdk/dpdk-1.5.1r1/examples/sample/build/lib >> >> -Wl,-L/home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/lib >> >> -Wl,-L/home/hamid/dpdk/dpdk-1.5.1r1/x86_64-default-linuxapp-gcc/lib >> >> -Wl,-lrte_kni -Wl,-lrte_pmd_e1000 -Wl,-lrte_pmd_ixgbe -Wl,-lrte_mbuf >> >> -Wl,-lrte_cmdline -Wl,-lrte_timer -Wl,-lrte_hash -Wl,-lrte_lpm >> >> -Wl,--start-group -Wl,-lethdev -Wl,-lrte_malloc -Wl,-lrte_mempool >> >> -Wl,-lrte_ring -Wl,-lrte_eal -Wl,-ldl -Wl,--end-group >> > >> > Try CONFIG_RTE_BUILD_COMBINE_LIBS=y and -lintel_dpdk instead of all >> these >> > libraries. You can also remove the warning options if you want. >> > >> > You can also try to build your Makefile by including files like >> > mk/rte.extapp.mk and defining CC=g++. >> > I don't exactly know what is needed for C++. Please keep us informed. >> > >> > -- >> > Thomas >> > >> > >