Great, I'm glad it's working now. Now that you mention it I think there was another bug that js_embed was getting installed to /usr/bin, which doesn't really make sense since that program is just used as part of the build and isn't useful for anything else. I believe that is now fixed, too.
On Thu, Jan 5, 2017 at 7:32 PM, Maxx Becker <maxx.bec...@gmail.com> wrote: > Thanks so much for your replies! I was able to limp along initially by > copying the x64 js_embed binary from /usr/bin to src/ before > cross-compiling. > make check failed all tests in that case but the tools appear to work! > > I tried both of your suggestions, with success, as described below. Before > doing so, I ran "make uninstall" and "make clean" for both cross-compile > and host build configurations so everything was wiped out, then I re-ran > the configure and build steps for the host arch before attempting to > cross-compile using the same configuration commands noted previously. > > @Feng Xiao, I obtained the protobuf-cpp-3.1.0 files from > https://github.com/google/protobuf/releases and had success. > @Adam Cozzette I checked out your branch, verified the macro change, built > and had success. > > In both cases, "make check" failed all tests because the host machine was > unable to execute the binaries in .lib, as they were built in this case for > the ARM arch. > > -Maxx > > > On Thursday, January 5, 2017 at 3:30:22 PM UTC-8, Adam Cozzette wrote: >> >> I went ahead and merged this to master with pull request 2565 >> <https://github.com/google/protobuf/pull/2565> and so cross compilation >> should now work again. >> >> On Tue, Jan 3, 2017 at 1:29 PM, Adam Cozzette <acoz...@google.com> wrote: >> >>> I updated the Autotools build so that it should now correctly build >>> js_embed in a form that's executable on the build machine. It is not in >>> master yet but it is on my cross-compilation branch here: >>> https://github.com/acozzette/protobuf/tree/cross-compilation Maxx, when >>> you have a chance you could you try building on that branch and let me know >>> if it works? >>> >>> On Tue, Jan 3, 2017 at 11:53 AM, Adam Cozzette <acoz...@google.com> >>> wrote: >>> >>>> I hadn't thought about the cross-compilation use case for this. It >>>> seems to me that there are a few different ways to solve this: >>>> 1. Just check well_known_types_embed.cc into Git and we can update it >>>> manually when necessary. This is probably the easiest solution but is a >>>> little bit messy since it requires us to check in another build artifact. >>>> 2. Fix the Autotools build to do the cross-compilation properly on its >>>> own. For this we would probably want to use the AX_PROG_CXX_FOR_BUILD macro >>>> from here >>>> <https://www.gnu.org/software/autoconf-archive/ax_prog_cxx_for_build.html> >>>> as >>>> a way of finding the right C++ compiler to use for building binaries that >>>> need to run as part of the build. >>>> 3. Rely on Bazel for cross-compilation since it is pretty good at >>>> handling this automatically: https://bazel.b >>>> uild/versions/master/docs/bazel-user-manual.html#configurations >>>> 4. Rewrite js/embed.cc as a Python or Perl or shell script so that it >>>> doesn't require compilation. The problem with this is that it would add >>>> another dependency to the build and might make it less portable (e.g. for >>>> Windows). >>>> >>>> Let me try using the AX_PROG_CXX_FOR_BUILD macro and see if that will >>>> work. >>>> >>>> On Tue, Jan 3, 2017 at 11:12 AM, 'Feng Xiao' via Protocol Buffers < >>>> prot...@googlegroups.com> wrote: >>>> >>>>> +acozzette >>>>> >>>>> The js_embed binary was added very recently. The cross-build support >>>>> for that binary is missing at the moment. As a temporary solution, you can >>>>> use this version of protobuf (which doesn't have the js_embed binary): >>>>> https://github.com/google/protobuf/releases/tag/v3.1.0 >>>>> >>>>> >>>>> On Wed, Dec 28, 2016 at 11:57 PM, Maxx Becker <maxx....@gmail.com> >>>>> wrote: >>>>> >>>>>> I'm a newbie, but I have successfully built the protocol buffers >>>>>> sources (version 3.1.0) on Ubuntu 14.04 x86_64 and installed, as per >>>>>> https://github.com/google/protobuf/blob/master/src/README.md >>>>>> I am now attempting to cross-compile to an ARM target, using the >>>>>> cross-compiling info from the README above and the following as >>>>>> references: >>>>>> https://groups.google.com/forum/#!topic/protobuf/ZWuTzg-N0E0 >>>>>> After running 'make clean' and re-configuring to use the >>>>>> arm-linux-gnueabihf compilers and the previously installed x64 protoc, I >>>>>> encounter a error that indicates it is attempting to use the js_embed >>>>>> binary built for ARM in the process. >>>>>> Relevant info as follows: >>>>>> >>>>>> $ which protoc js_embed >>>>>> /usr/bin/protoc >>>>>> /usr/bin/js_embed >>>>>> >>>>>> $ file /usr/bin/protoc /usr/bin/js_embed >>>>>> /usr/bin/protoc: ELF 64-bit LSB executable, x86-64, version 1 >>>>>> (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, >>>>>> BuildID[sha1]=637edeade5ad13f462551a45ae1285e55a2a1f3c, not stripped >>>>>> /usr/bin/js_embed: ELF 64-bit LSB executable, x86-64, version 1 >>>>>> (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, >>>>>> BuildID[sha1]=e49255de4711facf660f838ad7bad9b01525cf12, not stripped >>>>>> >>>>>> $ arm-linux-gnueabihf-gcc --version >>>>>> arm-linux-gnueabihf-gcc (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) 4.8.4 >>>>>> $ arm-linux-gnueabihf-g++ --version >>>>>> arm-linux-gnueabihf-g++ (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) 4.8.4 >>>>>> >>>>>> $ g++ --version >>>>>> g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4 >>>>>> $ gcc --version >>>>>> gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4 >>>>>> >>>>>> $ make clean >>>>>> $ ./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc >>>>>> CXX=arm-linux-gnueabihf-g++ --with-protoc=/usr/bin/protoc >>>>>> --prefix=/programs/protobuf >>>>>> (Can post output if desired) >>>>>> >>>>>> $ make >>>>>> make all-recursive >>>>>> make[1]: Entering directory `/storage/tools/protobuf' >>>>>> Making all in . >>>>>> make[2]: Entering directory `/storage/tools/protobuf' >>>>>> make[2]: Leaving directory `/storage/tools/protobuf' >>>>>> Making all in src >>>>>> make[2]: Entering directory `/storage/tools/protobuf/src' >>>>>> /usr/bin/protoc -I. --cpp_out=. google/protobuf/any_test.proto >>>>>> google/protobuf/compiler/cpp/cpp_test_bad_identifiers.proto >>>>>> google/protobuf/map_lite_unittest.proto >>>>>> google/protobuf/map_proto2_unittest.proto >>>>>> google/protobuf/map_unittest.proto google/protobuf/unittest_arena.proto >>>>>> google/protobuf/unittest_custom_options.proto >>>>>> google/protobuf/unittest_drop_unknown_fields.proto >>>>>> google/protobuf/unittest_embed_optimize_for.proto >>>>>> google/protobuf/unittest_empty.proto >>>>>> google/protobuf/unittest_enormous_descriptor.proto >>>>>> google/protobuf/unittest_import_lite.proto >>>>>> google/protobuf/unittest_import.proto >>>>>> google/protobuf/unittest_import_public_lite.proto >>>>>> google/protobuf/unittest_import_public.proto >>>>>> google/protobuf/unittest_lite_imports_nonlite.proto >>>>>> google/protobuf/unittest_lite.proto google/protobuf/unittest_mset.proto >>>>>> google/protobuf/unittest_mset_wire_format.proto >>>>>> google/protobuf/unittest_no_arena_lite.proto >>>>>> google/protobuf/unittest_no_arena_import.proto >>>>>> google/protobuf/unittest_no_arena.proto >>>>>> google/protobuf/unittest_no_field_presence.proto >>>>>> google/protobuf/unittest_no_generic_services.proto >>>>>> google/protobuf/unittest_optimize_for.proto >>>>>> google/protobuf/unittest_preserve_unknown_enum2.proto >>>>>> google/protobuf/unittest_preserve_unknown_enum.proto >>>>>> google/protobuf/unittest.proto >>>>>> google/protobuf/unittest_proto3_arena.proto >>>>>> google/protobuf/unittest_proto3_arena_lite.proto >>>>>> google/protobuf/unittest_proto3_lite.proto >>>>>> google/protobuf/unittest_well_known_types.proto >>>>>> google/protobuf/util/internal/testdata/anys.proto >>>>>> google/protobuf/util/internal/testdata/books.proto >>>>>> google/protobuf/util/internal/testdata/default_value.proto >>>>>> google/protobuf/util/internal/testdata/default_value_test.proto >>>>>> google/protobuf/util/internal/testdata/field_mask.proto >>>>>> google/protobuf/util/internal/testdata/maps.proto >>>>>> google/protobuf/util/internal/testdata/oneofs.proto >>>>>> google/protobuf/util/internal/testdata/proto3.proto >>>>>> google/protobuf/util/internal/testdata/struct.proto >>>>>> google/protobuf/util/internal/testdata/timestamp_duration.proto >>>>>> google/protobuf/util/internal/testdata/wrappers.proto >>>>>> google/protobuf/util/json_format_proto3.proto >>>>>> google/protobuf/util/message_differencer_unittest.proto >>>>>> google/protobuf/compiler/cpp/cpp_test_large_enum_value.proto >>>>>> touch unittest_proto_middleman >>>>>> depbase=`echo google/protobuf/compiler/js/embed.o | sed >>>>>> 's|[^/]*$|.deps/&|;s|\.o$||'`;\ >>>>>> arm-linux-gnueabihf-g++ -std=c++11 -DHAVE_CONFIG_H -I. -I.. >>>>>> -pthread -DHAVE_PTHREAD=1 -Wall -Wno-sign-compare -O2 -g -DNDEBUG -MT >>>>>> google/protobuf/compiler/js/embed.o -MD -MP -MF $depbase.Tpo -c -o >>>>>> google/protobuf/compiler/js/embed.o google/protobuf/compiler/js/embed.cc >>>>>> &&\ >>>>>> mv -f $depbase.Tpo $depbase.Po >>>>>> /bin/bash ../libtool --tag=CXX --mode=link arm-linux-gnueabihf-g++ >>>>>> -std=c++11 -pthread -DHAVE_PTHREAD=1 -Wall -Wno-sign-compare -O2 -g >>>>>> -DNDEBUG -pthread -o js_embed google/protobuf/compiler/js/embed.o >>>>>> libtool: link: arm-linux-gnueabihf-g++ -std=c++11 -pthread >>>>>> -DHAVE_PTHREAD=1 -Wall -Wno-sign-compare -O2 -g -DNDEBUG -pthread -o >>>>>> js_embed google/protobuf/compiler/js/embed.o -pthread >>>>>> oldpwd=`pwd` && cd . && \ >>>>>> $oldpwd/js_embed google/protobuf/compiler/js/well_known_types/any.js >>>>>> google/protobuf/compiler/js/well_known_types/struct.js >>>>>> google/protobuf/compiler/js/well_known_types/timestamp.js > >>>>>> $oldpwd/google/protobuf/compiler/js/well_known_types_embed.cc >>>>>> */bin/bash: line 1: /tools/protobuf/src/js_embed: cannot execute >>>>>> binary file: Exec format error* >>>>>> make[2]: *** [google/protobuf/compiler/js/well_known_types_embed.cc] >>>>>> Error 126 >>>>>> make[2]: Leaving directory `/storage/tools/protobuf/src' >>>>>> make[1]: *** [all-recursive] Error 1 >>>>>> make[1]: Leaving directory `/storage/tools/protobuf' >>>>>> make: *** [all] Error 2 >>>>>> >>>>>> $ file src/js_embed >>>>>> src/js_embed: ELF 32-bit LSB executable, ARM, EABI5 version 1 >>>>>> (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, >>>>>> BuildID[sha1]=74fb68528ae9db46637e1570eeda640ae9f318f1, not stripped >>>>>> >>>>>> It's unclear how I can direct the compilation process to use the >>>>>> js_embed binary in /usr/bin, instead of the js_embed binary it builds for >>>>>> ARM. Any help or direction is appreciated. Thanks! >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Protocol Buffers" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to protobuf+u...@googlegroups.com. >>>>>> To post to this group, send email to prot...@googlegroups.com. >>>>>> Visit this group at https://groups.google.com/group/protobuf. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Protocol Buffers" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to protobuf+u...@googlegroups.com. >>>>> To post to this group, send email to prot...@googlegroups.com. >>>>> Visit this group at https://groups.google.com/group/protobuf. >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> >>> >> -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to protobuf+unsubscr...@googlegroups.com. > To post to this group, send email to protobuf@googlegroups.com. > Visit this group at https://groups.google.com/group/protobuf. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at https://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
