For the first case, the problem is that the build is trying to run protoc as
part of the build process, and it's trying to use the cross-compiled protoc.
I think you can fix this by editing src/Makefile.am at line 201 to change
this:
unittest_proto_middleman: protoc$(EXEEXT) $(protoc_inputs)
./$^ -I$(srcdir) --cpp_out=.
to this:
unittest_proto_middleman: $(protoc_inputs)
protoc $^ -I$(srcdir) --cpp_out=.
In other words, this will use the protoc that you have already installed on
your system rather than the one you just built.
I guess we should figure out how to make this automatic.
On Tue, Oct 21, 2008 at 8:42 AM, <[EMAIL PROTECTED]> wrote:
>
> I'm trying to cross compile for a ppc platform from x86 Linux.
> I've used the same procedure as I used to successfully cross
> compile other tools (not to say that the procedure is actually right)
> but I get some errors. Here's what I tried:
>
> setenv CC /opt/cross_compiler/ppc/gcc-4.1.0-glibc-2.3.6/powerpc-603-
> linux-gnu/bin/powerpc-603-linux-gnu-gcc
> setenv CXX /opt/cross_compiler/ppc/gcc-4.1.0-glibc-2.3.6/powerpc-603-
> linux-gnu/bin/powerpc-603-linux-gnu-g++
> setenv PATH "$PATH":/opt/cross_compiler/ppc/gcc-4.1.0-glibc-2.3.6/
> powerpc-603-linux-gnu/bin
> cd /tmp/pbmpc5200/protobuf-2.0.2rc1/
> ./configure --target=ppc-603-linux-gnu --host=ppc-603-linux-gnu --
> build=i686
> make
>
> Here are the errors:
> make[2]: Entering directory `/tmp/pbmpc5200/protobuf-2.0.2rc1/src'
> ./protoc google/protobuf/unittest.proto google/protobuf/
> unittest_import.proto google/protobuf/unittest_mset.proto google/
> protobuf/unittest_optimize_for.proto google/protobuf/
> unittest_embed_optimize_for.proto google/protobuf/
> unittest_custom_options.proto google/protobuf/compiler/cpp/
> cpp_test_bad_identifiers.proto -I. --cpp_out=.
> ./protoc: line 105: /tmp/pbmpc5200/protobuf-2.0.2rc1/src/.libs/lt-
> protoc: cannot execute binary file
> ./protoc: line 105: /tmp/pbmpc5200/protobuf-2.0.2rc1/src/.libs/lt-
> protoc: Success
> make[2]: *** [unittest_proto_middleman] Error 1
> make[2]: Leaving directory `/tmp/pbmpc5200/protobuf-2.0.2rc1/src'
> make[1]: *** [all-recursive] Error 1
> make[1]: Leaving directory `/tmp/pbmpc5200/protobuf-2.0.2rc1'
> make: *** [all] Error 2
>
> The libprotobuf.so that I wanted actually was actually created and
> works, but there were
> errors reported. Did I configure incorrectly or are these errors just
> expected when cross
> compiling? I looks like it might be trying to run a cross compiled
> binary?
>
> Similarly, when cross compiling to win32 using mingw, I get an error:
>
> make[2]: Entering directory `/tmp/pbmingw/protobuf-2.0.2rc1/src'
> /bin/sh ../libtool --tag=CXX --mode=link /opt/cross-tools/bin/i386-
> mingw32msvc-g++ -Wall -Wwrite-strings -Woverloaded-virtual -Wno-sign-
> compare -g -O2 -o protoc.exe main.o libprotobuf.la libprotoc.la
> /opt/cross-tools/bin/i386-mingw32msvc-g++ -Wall -Wwrite-strings -
> Woverloaded-virtual -Wno-sign-compare -g -O2 -o protoc.exe
> main.o ./.libs/libprotobuf.a -L/tmp/mingwtmp/gcc-i386-mingw32msvc/
> i386-mingw32msvc/libstdc++-v3/src -L/tmp/mingwtmp/gcc-i386-mingw32msvc/
> i386-mingw32msvc/libstdc++-v3/src/.libs -L/tmp/mingwtmp/gcc-i386-
> mingw32msvc/gcc -L/opt/cross-tools/i386-mingw32msvc/bin -L/opt/cross-
> tools/i386-mingw32msvc/lib -L/opt/cross-tools/lib/../i386-mingw32msvc/
> lib ./.libs/libprotoc.a /tmp/pbmingw/protobuf-2.0.2rc1/src/.libs/
> libprotobuf.a /opt/cross-tools/i386-mingw32msvc/lib/libstdc++.a -lm
> ./.libs/libprotobuf.a: could not read symbols: Archive has no index;
> run ranlib to add one
> collect2: ld returned 1 exit status
> make[2]: *** [protoc.exe] Error 1
> make[2]: Leaving directory `/tmp/pbmingw/protobuf-2.0.2rc1/src'
> make[1]: *** [all-recursive] Error 1
> make[1]: Leaving directory `/tmp/pbmingw/protobuf-2.0.2rc1'
> make: *** [all] Error 2
>
> Manually running ranlib on the library seems to work. So in both
> cases,
> the builds gave errors but I was able to get the libraries I needed.
>
>
> Thanks,
>
> David
>
>
> >
>
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