Could someone tell me how to build gollvm?

[yuan...@ict.ac.cn]

I try to build gollvm on ubuntu(x64) following these commands in https://go.googlesource.com/gollvm/ :

% cd workarea

% mkdir build-debug

% cd build-debug

% cmake -DCMAKE_BUILD_TYPE=Debug -DLLVM_USE_LINKER=gold ../llvm

...

% make gollvm -j4

...

%

but I got

-- Targeting X86

-- starting libgo configuration.

/home/yt/LLVMsvn/llvm-project/llvm/tools/gollvm/gofrontend/libgo/match.sh:138: no such file or directory:  common.go format.go reader.go stat_actime1.go stat_actime2.go stat_unix.go strconv.go writer.go

/home/yt/LLVMsvn/llvm-project/llvm/tools/gollvm/gofrontend/libgo/match.sh:138: no such file or directory:  reader.go register.go struct.go writer.go
......

-- Performing Test HAVE_STEADY_CLOCK -- success

-- Configuring done

-- Generating done

-- Build files have been written to: /home/yt/LLVMsvn/llvm-project/debug
...

[  0%] Built target LLVMDemangle

[  0%] Built target GoDumpSpecMacroParser
...

[ 50%] Building Go package 'runtime' (non-PIC)

/home/yt/LLVMsvn/llvm-project/debug/tools/gollvm/libgo/sigtab.go:5:21: error: use of undefined type 'sigTabT'

/home/yt/LLVMsvn/llvm-project/debug/tools/gollvm/libgo/sigtab.go:7:12: error: reference to undefined name '_SigNotify'

/home/yt/LLVMsvn/llvm-project/debug/tools/gollvm/libgo/sigtab.go:7:25: error: reference to undefined name '_SigKill'

/home/yt/LLVMsvn/llvm-project/debug/tools/gollvm/libgo/sigtab.go:8:12: error: reference to undefined name '_SigNotify'

...

tools/gollvm/libgo/CMakeFiles/libgo_runtime.dir/build.make:64: recipe for target 'tools/gollvm/libgo/runtime.o' failed

make[3]: *** [tools/gollvm/libgo/runtime.o] Error 3

CMakeFiles/Makefile2:16487: recipe for target 'tools/gollvm/libgo/CMakeFiles/libgo_runtime.dir/all' failed

make[2]: *** [tools/gollvm/libgo/CMakeFiles/libgo_runtime.dir/all] Error 2

CMakeFiles/Makefile2:11625: recipe for target 'tools/gollvm/CMakeFiles/gollvm.dir/rule' failed

make[1]: *** [tools/gollvm/CMakeFiles/gollvm.dir/rule] Error 2

Makefile:3475: recipe for target 'gollvm' failed

make: *** [gollvm] Error 2

I have no idea about this problem. Should I switch make to ninja (like the document said)?

[Than McIntosh]

Hello,

For the gollvm build ninja is recommended (using "make" is untested and I doubt if it will work).

Thanks, Than

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[Ting Yuan]

Hello Than,

when I using ninja to build gollvm, just like

% cmake -DCMAKE_INSTALL_PREFIX=/home/yt/LLVMsvn/install -DLLVM_TARGETS_TO_BUILD=X86 -DCMAKE_BUILD_TYPE=Debug -DLLVM_USE_LINKER=gold -G "Ninja" ../llvm
% ninja gollvm

the build system still reports an error:

ninja: error: '/home/yt/LLVMsvn/llvm-project/llvm/tools/gollvm/gotools/buildid.go', needed by 'tools/gollvm/gotools/buildid', missing and no known rule to make it

I notice that some warnings are raised during the configuration like:

/home/yt/LLVMsvn/llvm-project/llvm/tools/gollvm/gofrontend/libgo/match.sh:138: no such file or directory:  action.go build.go buildid.go exec.go gc.go gccgo.go init.go security.go testgo.go

Is there something I missing ?

在 2019年5月7日星期二 UTC+8下午9:48:48，Than McIntosh写道：

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[Than McIntosh]

Hi,

From the error output it sounds like something went wrong with the initial cmake run -- the error from match.sh seems nonsensical (it suggests that the script is looking for gotools sources in the wrong location).

One possibility would be that you don't have "sed" installed on your system?

Thanks, Than

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[Ting Yuan]

Hi Than,

On my system the version of sed is 4.4. Is the version mismatch?

I found there are only two files (CMakeLists.txt and gotestprogram.sh) under the llvm/tools/gollvm/gotools/. Should the missing files (e.g. buildid.go) be there?

Thanks.

[Than McIntosh]

Hmm, OK, sounds like 'sed' is not the issue.

>>I found there are only two files (CMakeLists.txt and gotestprogram.sh) under the llvm/tools/gollvm/gotools/. Should the missing files (e.g. buildid.go) be there?

No, this is expected. The Go sources for 'buildid' will be pulled from <LLVMROOT>/tools/gollvm/gofrontend/libgo/go/cmd/buildid.

At this point what I would recommend to gather more info: rerun cmake and pass it the "--trace-expand" flag, e.g.

cmake --trace-expand -DCMAKE_BUILD_TYPE=Debug -DLLVM_USE_LINKER=gold ../llvm

Be warned that this will produce a huge amount of output (~40M or so). Sift through the output and see if you can find the place where it is trying to locate the source files for the buildid tool by running 'match.sh'. Should look something like

/root/llvm/tools/gollvm/gotools/CMakeLists.txt(55):  if(NOT EXISTS /root/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid )

/root/llvm/tools/gollvm/gotools/CMakeLists.txt(57):  else()

/root/llvm/tools/gollvm/gotools/CMakeLists.txt(58):  set(tool_target gotools_cmd_buildid )

/root/llvm/tools/gollvm/gotools/CMakeLists.txt(62):  execute_process(COMMAND /bin/bash /root/llvm/tools/gollvm/gofrontend/libgo/match.sh --goarch=amd64 --goos=linux --srcdir=/root/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid OUTPUT_VARIABLE toolfiles ERROR_VARIABLE errmsg RESULT_VARIABLE exitstatus )

/root/llvm/tools/gollvm/gotools/CMakeLists.txt(68):  if(NOT 0 MATCHES 0 )

/root/llvm/tools/gollvm/gotools/CMakeLists.txt(71):  string(STRIP /root/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid/buildid.go /root/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid/doc.go

 toolfiles )

I am thinking that maybe there is something going wrong with the invocation of 'match.sh' in your case that is throwing things off.

Thanks, Than

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[Ting Yuan]

OK, I got something like

...

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(55):  if(NOT EXISTS /home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid )

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(57):  else()

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(58):  set(tool_target gotools_cmd_buildid )

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(62):  execute_process(COMMAND /usr/bin/zsh /home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/libgo/match.sh --goarch=amd64 --goos=linux --srcdir=/home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid OUTPUT_VARIABLE toolfiles ERROR_VARIABLE errmsg RESULT_VARIABLE exitstatus )

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(68):  if(NOT 0 MATCHES 0 )

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(71):  string(STRIP  /home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/libgo/go/cmd/buildid/ buildid.go doc.go

 toolfiles )

/home/yt/LLVMsvn/llvm/tools/gollvm/gotools/CMakeLists.txt(72):  separate_arguments(toolfiles )

...

I found that the absolute path of buildid.go is illegal (there is a space before the filename). This looks like the root cause.

[Than McIntosh]

Agree, the embedded space looks fishy.

I also note that your shell is set to zsh -- you might try instead using SHELL=/bin/sh to see if that works better.

Thanks, Than

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[Ting Yuan]

Hi Than,
It turned out to be the problem of shell. By SHELL=/bin/sh I can build gollvm in the right way, but I still failed on a compile error:

[2066/3237] Building CXX object tools/gollvm/bridge/CMakeFiles/LLVMCppGoFrontEnd.dir/__/gofrontend/go/go.cc.o

FAILED: tools/gollvm/bridge/CMakeFiles/LLVMCppGoFrontEnd.dir/__/gofrontend/go/go.cc.o

/usr/bin/c++  -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Itools/gollvm/bridge -I/home/yt/LLVMsvn/llvm/tools/gollvm/bridge -I/usr/include/libxml2 -Iinclude -I/home/yt/LLVMsvn/llvm/include -Itools/gollvm/external/install/include -I/home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/go -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -fdiagnostics-color -g    -fno-exceptions -fno-rtti -MD -MT tools/gollvm/bridge/CMakeFiles/LLVMCppGoFrontEnd.dir/__/gofrontend/go/go.cc.o -MF tools/gollvm/bridge/CMakeFiles/LLVMCppGoFrontEnd.dir/__/gofrontend/go/go.cc.o.d -o tools/gollvm/bridge/CMakeFiles/LLVMCppGoFrontEnd.dir/__/gofrontend/go/go.cc.o -c /home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/go/go.cc

/home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/go/go.cc: In function ‘void go_create_gogo(const go_create_gogo_args*)’:

/home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/go/go.cc:47:13: error: ‘const struct go_create_gogo_args’ has no member named ‘debug_optimization’

  if (args->debug_optimization)

            ^~~~~~~~~~~~~~~~~~

/home/yt/LLVMsvn/llvm/tools/gollvm/gofrontend/go/go.cc:48:42: error: ‘const struct go_create_gogo_args’ has no member named ‘debug_optimization’

    ::gogo->set_debug_optimization(args->debug_optimization);

                                         ^~~~~~~~~~~~~~~~~~

[2069/3237] Building CXX object tools/gollvm/bridge/CMakeFiles/LLVMCppGoFrontEnd.dir/__/gofrontend/go/gogo.cc.o

ninja: build stopped: subcommand failed.

I checked the structure go_create_gogo_args (in gollvm/bridge/go-c.h) and there really wasn't a field called debug_optimization there. Could I add this field in go_create_gogo_args so I can let the build progress continue?

Thanks.

[Than McIntosh]

There was a recent checkin related to -fdebug-go-optimization in both repos-- I think the failure you're seeing is just build skew.

Try doing a "git pull" in llvm/tools/gollvm and llvm/tools/gollvm/gofrontend to make sure everything is up to date.

Thanks, Than

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[Yuan Ting]

Oh, my mistake. I can successfully build gollvm now, thank you so much!