[dpdk-dev] Building with 'make install T=' and 'make config T='

Wiles, Keith keith.wiles at intel.com
Wed Dec 9 16:32:59 CET 2015
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On 12/9/15, 8:59 AM, "Thomas Monjalon" <thomas.monjalon at 6wind.com> wrote:

>2015-12-09 14:39, Wiles, Keith:
>> I am having a problem with ‘make install T=‘ command as I was using it before. I would normally build a x86_64-native-linuxapp-gcc, clang and icc or a different config all together. Currently the ‘make install T=‘ gives a warning message at the end of the build plus creates the x86_64-native-linuxapp-XXX directory. If I use the suggested ‘make config T=‘ command this command create a directory ‘build’ with a .config file. The problem is this method does not allow me to have multiple builds at the same time.
>> 
>> What is the suggested method to have multiple builds without installing  into the local file system?
>
>The multiple build is not supported anymore. It was only building with
>the default configuration.
>If you want to test various builds, I suggest to use this script:
>	scripts/test-build.sh
>	http://dpdk.org/browse/dpdk/commit/?id=cd31ca579c

Having a build script is great, but it give me an error on building. The script does not have a —help option and the unknown option is not very usefulas it does not explain the two option -jX and -s in that output message. I would have expected a bit more help instructions on using this command and adding a -h or —help would be useful. 

The error I get from the following command is: './scripts/test-build.sh x86_64-native-linuxapp-gcc’ building on a Ubuntu 15.10 with all patches. If I use ‘make install T=x86_64-native-linuxapp-gcc’ this command builds correctly with the warning at the end.

Custom configuration
Configuration done
Configuration done
Using local configuration
== Build lib
== Build lib/librte_compat
== Build lib/librte_eal
== Build lib/librte_net
  SYMLINK-FILE include/rte_compat.h
  SYMLINK-FILE include/rte_ip.h
  SYMLINK-FILE include/rte_tcp.h
  SYMLINK-FILE include/rte_udp.h
  SYMLINK-FILE include/rte_sctp.h
  SYMLINK-FILE include/rte_icmp.h
  SYMLINK-FILE include/rte_arp.h
== Build lib/librte_eal/common
  SYMLINK-FILE include/generic/rte_atomic.h
  SYMLINK-FILE include/generic/rte_byteorder.h
  SYMLINK-FILE include/generic/rte_cycles.h
  SYMLINK-FILE include/generic/rte_prefetch.h
  SYMLINK-FILE include/generic/rte_spinlock.h
  SYMLINK-FILE include/generic/rte_memcpy.h
  SYMLINK-FILE include/generic/rte_cpuflags.h
  SYMLINK-FILE include/generic/rte_rwlock.h
  SYMLINK-FILE include/rte_branch_prediction.h
  SYMLINK-FILE include/rte_common.h
  SYMLINK-FILE include/rte_debug.h
  SYMLINK-FILE include/rte_eal.h
  SYMLINK-FILE include/rte_errno.h
  SYMLINK-FILE include/rte_launch.h
  SYMLINK-FILE include/rte_lcore.h
  SYMLINK-FILE include/rte_log.h
  SYMLINK-FILE include/rte_memory.h
  SYMLINK-FILE include/rte_memzone.h
  SYMLINK-FILE include/rte_pci.h
  SYMLINK-FILE include/rte_pci_dev_ids.h
  SYMLINK-FILE include/rte_per_lcore.h
  SYMLINK-FILE include/rte_random.h
  SYMLINK-FILE include/rte_interrupts.h
  SYMLINK-FILE include/rte_alarm.h
  SYMLINK-FILE include/rte_string_fns.h
  SYMLINK-FILE include/rte_version.h
  SYMLINK-FILE include/rte_tailq.h
  SYMLINK-FILE include/rte_eal_memconfig.h
  SYMLINK-FILE include/rte_malloc_heap.h
  SYMLINK-FILE include/rte_hexdump.h
  SYMLINK-FILE include/rte_devargs.h
  SYMLINK-FILE include/rte_dev.h
  SYMLINK-FILE include/rte_pci_dev_feature_defs.h
  SYMLINK-FILE include/rte_pci_dev_features.h
  SYMLINK-FILE include/rte_malloc.h
  SYMLINK-FILE include/rte_keepalive.h
  SYMLINK-FILE include/rte_time.h
  SYMLINK-FILE include/rte_rwlock.h
  SYMLINK-FILE include/rte_memcpy.h
  SYMLINK-FILE include/rte_cycles.h
  SYMLINK-FILE include/rte_spinlock.h
  SYMLINK-FILE include/rte_atomic_32.h
  SYMLINK-FILE include/rte_vect.h
  SYMLINK-FILE include/rte_prefetch.h
  SYMLINK-FILE include/rte_byteorder_32.h
  SYMLINK-FILE include/rte_atomic_64.h
  SYMLINK-FILE include/rte_byteorder_64.h
  SYMLINK-FILE include/rte_cpuflags.h
  SYMLINK-FILE include/rte_rtm.h
  SYMLINK-FILE include/rte_atomic.h
  SYMLINK-FILE include/rte_byteorder.h
== Build lib/librte_eal/linuxapp
== Build lib/librte_eal/linuxapp/igb_uio
== Build lib/librte_eal/linuxapp/eal
  CC eal.o
  CC eal_hugepage_info.o
  CC eal_memory.o
  CC eal_thread.o
  CC eal_log.o
  CC eal_pci_vfio.o
  CC eal_debug.o
  CC eal_pci_uio.o
  CC eal_pci.o
  CC eal_alarm.o
  CC eal_common_lcore.o
  CC eal_common_launch.o
  CC eal_common_memzone.o
  CC eal_common_pci.o
  CC eal_lcore.o
  CC eal_pci_vfio_mp_sync.o
  CC eal_common_pci_uio.o
  CC eal_common_timer.o
  CC eal_interrupts.o
  CC eal_timer.o
  CC eal_common_memory.o
  CC eal_common_log.o
  CC eal_common_cpuflags.o
  CC eal_common_errno.o
  CC eal_common_string_fns.o
  CC eal_common_tailqs.o
  CC eal_common_hexdump.o
  CC rte_malloc.o
  SYMLINK-FILE include/exec-env/rte_interrupts.h
  SYMLINK-FILE include/exec-env/rte_dom0_common.h
  SYMLINK-FILE include/exec-env/rte_kni_common.h
  CC malloc_elem.o
  CC eal_common_devargs.o
  CC eal_common_dev.o
  CC eal_common_thread.o
  CC malloc_heap.o
  CC eal_common_options.o
  CC rte_keepalive.o
/work/home/rkwiles/projects/intel/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c: In function \u2018pci_config_extended_tag\u2019:
/work/home/rkwiles/projects/intel/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c:505:2: error: ignoring return value of \u2018fgets\u2019, declared with attribute warn_unused_result [-Werror=unused-result]
  fgets(buf, sizeof(buf), f);
  ^
/work/home/rkwiles/projects/intel/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c: In function \u2018pci_config_max_read_request_size\u2019:
/work/home/rkwiles/projects/intel/dpdk/lib/librte_eal/linuxapp/eal/eal_pci.c:545:2: error: ignoring return value of \u2018fgets\u2019, declared with attribute warn_unused_result [-Werror=unused-result]
  fgets(buf, sizeof(buf), f);
  ^
cc1: all warnings being treated as errors
/work/home/rkwiles/projects/intel/dpdk/mk/internal/rte.compile-pre.mk:126: recipe for target 'eal_pci.o' failed
make[7]: *** [eal_pci.o] Error 1
make[7]: *** Waiting for unfinished jobs....
/work/home/rkwiles/projects/intel/dpdk/mk/rte.subdir.mk:61: recipe for target 'eal' failed
make[6]: *** [eal] Error 2
make[6]: *** Waiting for unfinished jobs....
  LD      /work/home/rkwiles/projects/intel/dpdk/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/built-in.o
(cat /dev/null;   echo kernel//work/home/rkwiles/projects/intel/dpdk/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.ko;) > /work/home/rkwiles/projects/intel/dpdk/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/modules.order
  CC [M]  /work/home/rkwiles/projects/intel/dpdk/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /work/home/rkwiles/projects/intel/dpdk/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.mod.o
  LD [M]  /work/home/rkwiles/projects/intel/dpdk/x86_64-native-linuxapp-gcc/build/lib/librte_eal/linuxapp/igb_uio/igb_uio.ko
INSTALL-MODULE igb_uio.ko
/work/home/rkwiles/projects/intel/dpdk/mk/rte.subdir.mk:61: recipe for target 'linuxapp' failed
make[5]: *** [linuxapp] Error 2
/work/home/rkwiles/projects/intel/dpdk/mk/rte.subdir.mk:61: recipe for target 'librte_eal' failed
make[4]: *** [librte_eal] Error 2
/work/home/rkwiles/projects/intel/dpdk/mk/rte.sdkbuild.mk:77: recipe for target 'lib' failed
make[3]: *** [lib] Error 2
/work/home/rkwiles/projects/intel/dpdk/mk/rte.sdkroot.mk:123: recipe for target 'all' failed
make[2]: *** [all] Error 2
/work/home/rkwiles/projects/intel/dpdk/mk/rte.sdkinstall.mk:84: recipe for target 'pre_install' failed
make[1]: *** [pre_install] Error 2
/work/home/rkwiles/projects/intel/dpdk/mk/rte.sdkroot.mk:98: recipe for target 'install' failed
make: *** [install] Error 2




>If you just want to compile, it is simple:
>	make config T=x86_64-native-linuxapp-gcc O=my-gcc-build
>	make O=my-gcc-build

IMO we have gone backwards in making DPDK easy to build. I agree using ‘make install T=‘ may not be the best solution as ‘install’ implies we are installing the code. I agree not we should not try to build multiple configuration with one command, but we should be able to do ‘make build T=x86_64-native-linuxapp-gcc’ to replace the ‘make install T=‘ command. Now the developer only needs to type one command with to build a configuration and not two. If the developer includes the ‘O=‘ option then the command should create that directory and build the configuration into that directory. For the 80% rule the ‘O=‘ option should not be required.

The ‘make config T= O=‘ then ‘make O=‘ series of commands are not required, even the ‘config’ keyword is not required and just an extra step we do not need. What does the ‘config’ target really add to the made other then creating the ‘build’ directory and a config file. I believe the ‘build’ directory should be dropped/removed all together and just require the ‘T=‘ and/or the ‘O=‘ if they really want to define a different output directory.


>
>Note: the documentation was updated when doing this change.
>If you think something is missing, please comment.
>


Regards,
Keith
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