when I copy the project to another directory and rerun commands I mentioned
above, I get correct binary.
I think the problem is `ln -s _pkg_.a libPkg.a`.
The process was that I made an incomplete archive libPkg.a following the
shell script but I didn't use _buildid.o file as argument when using `ar
rcD ...` to build the archive. After that, whenever I executed the shell
script, the shell prompted `error:
/tmp/go-build3415416681/b001/_importcfgroot_/easyPkg/libPkg.a exists but
does not contain any Go export data`. I think it's because the `ln` tool
failed to link the libPkg.a archieve file but the compiler just ignored the
error and used the existing ligPkg.a, which I made by hand and didn't have
some information the following tool needed. Then errors occur.
The shell script is as follows, but I think my problem has been solved.
Thanks for your help!!!
```bash
WORK=/tmp/go-build3031634242
mkdir -p $WORK/b002/
cd $WORK
/data/mygo/gollvm_workarea/install/bin/llvm-goc -fgo-importcfg=/dev/null -c
-x c - -o /dev/null || true
/data/mygo/gollvm_workarea/install/bin/llvm-goc -ffile-prefix-map=a=b -c -x
c - -o /dev/null || true
cd /home/lqw/easyPkg/Pkg
/data/mygo/gollvm_workarea/install/bin/llvm-goc -c -O2 -g -m64
-fdebug-prefix-map=$WORK=/tmp/go-build -gno-record-gcc-switches
-fgo-pkgpath=easyPkg/Pkg -o $WORK/b002/_go_.o -I $WORK/b002/_importcfgroot_
./utils.go
echo ' .section .go.buildid,"e"' >> $WORK/b002/_buildid.s
echo ' .byte 0x58,0x63,0x75,0x74,0x74,0x43,0x71,0x46' >>
$WORK/b002/_buildid.s
echo ' .byte 0x36,0x2d,0x77,0x48,0x67,0x50,0x64,0x36' >>
$WORK/b002/_buildid.s
echo ' .byte 0x77,0x57,0x44,0x45,0x2f,0x58,0x63,0x75' >>
$WORK/b002/_buildid.s
echo ' .byte 0x74,0x74,0x43,0x71,0x46,0x36,0x2d,0x77' >>
$WORK/b002/_buildid.s
echo ' .byte 0x48,0x67,0x50,0x64,0x36,0x77,0x57,0x44' >>
$WORK/b002/_buildid.s
echo ' .byte 0x45' >> $WORK/b002/_buildid.s
echo ' .section .note.GNU-stack,"",@progbits' >> $WORK/b002/_buildid.s
echo ' .section .note.GNU-split-stack,"",@progbits' >>
$WORK/b002/_buildid.s
echo '' >> $WORK/b002/_buildid.s
/data/mygo/gollvm_workarea/install/bin/llvm-goc -xassembler-with-cpp -I
$WORK/b002/ -c -o $WORK/b002/_buildid.o -D GOOS_linux -D GOARCH_amd64 -D
GOPKGPATH=easyPkg_1Pkg -m64 $WORK/b002/_buildid.s
ar rcD $WORK/b002/_pkg_.a $WORK/b002/_go_.o $WORK/b002/_buildid.o
/data/mygo/gollvm_workarea/install/tools/buildid -w $WORK/b002/_pkg_.a #
internal
cp $WORK/b002/_pkg_.a
/home/lqw/.cache/go-build/99/99c687f035658ebacf01fe0034d140a1c9e79ce207f0efd169fcbe0d4f23634d-d
# internal
mkdir -p $WORK/b001/
cat >$WORK/b001/_gomod_.go << 'EOF' # internal
package main
import _ "unsafe"
//go:linkname __set_debug_modinfo__ runtime.setmodinfo
func __set_debug_modinfo__(string)
func init() {
__set_debug_modinfo__("0w\xaf\f\x92t\b\x02A\xe1\xc1\a\xe6\xd6\x18\xe6path\teasyPkg\nmod\teasyPkg\t(devel)\t\nbuild\t-compiler=gccgo\nbuild\tCGO_ENABLED=1\nbuild\tCGO_CFLAGS=\nbuild\tCGO_CPPFLAGS=\nbuild\tCGO_CXXFLAGS=\nbuild\tCGO_LDFLAGS=\nbuild\tGOARCH=amd64\nbuild\tGOEXPERIMENT=fieldtrack\nbuild\tGOOS=linux\nbuild\tGOAMD64=v1\n\xf92C1\x86\x18
r\x00\x82B\x10A\x16\xd8\xf2") }
EOF
mkdir -p $WORK/b001/_importcfgroot_/easyPkg
ln -s $WORK/b002/_pkg_.a $WORK/b001/_importcfgroot_/easyPkg/libPkg.a
cd /home/lqw/easyPkg
/data/mygo/gollvm_workarea/install/bin/llvm-goc -c -O2 -g -m64
-fdebug-prefix-map=$WORK=/tmp/go-build -gno-record-gcc-switches -o
$WORK/b001/_go_.o -I $WORK/b001/_importcfgroot_ ./main.go
$WORK/b001/_gomod_.go
echo ' .section .go.buildid,"e"' >> $WORK/b001/_buildid.s
echo ' .byte 0x62,0x6c,0x7a,0x44,0x45,0x34,0x43,0x38' >>
$WORK/b001/_buildid.s
echo ' .byte 0x56,0x42,0x6a,0x4e,0x6a,0x74,0x4e,0x68' >>
$WORK/b001/_buildid.s
echo ' .byte 0x66,0x71,0x4b,0x56,0x2f,0x62,0x6c,0x7a' >>
$WORK/b001/_buildid.s
echo ' .byte 0x44,0x45,0x34,0x43,0x38,0x56,0x42,0x6a' >>
$WORK/b001/_buildid.s
echo ' .byte 0x4e,0x6a,0x74,0x4e,0x68,0x66,0x71,0x4b' >>
$WORK/b001/_buildid.s
echo ' .byte 0x56' >> $WORK/b001/_buildid.s
echo ' .section .note.GNU-stack,"",@progbits' >> $WORK/b001/_buildid.s
echo ' .section .note.GNU-split-stack,"",@progbits' >>
$WORK/b001/_buildid.s
echo '' >> $WORK/b001/_buildid.s
/data/mygo/gollvm_workarea/install/bin/llvm-goc -xassembler-with-cpp -I
$WORK/b001/ -c -o $WORK/b001/_buildid.o -D GOOS_linux -D GOARCH_amd64 -m64
$WORK/b001/_buildid.s
ar rcD $WORK/b001/_pkg_.a $WORK/b001/_go_.o $WORK/b001/_buildid.o
/data/mygo/gollvm_workarea/install/tools/buildid -w $WORK/b001/_pkg_.a #
internal
cp $WORK/b001/_pkg_.a
/home/lqw/.cache/go-build/db/dbe11e7450e893503846799700cb9d0005a545c180087da01751b0ba8586d06d-d
# internal
cat >$WORK/b001/importcfg.link << 'EOF' # internal
packagefile easyPkg=$WORK/b001/_pkg_.a
packagefile easyPkg/Pkg=$WORK/b002/_pkg_.a
modinfo
"0w\xaf\f\x92t\b\x02A\xe1\xc1\a\xe6\xd6\x18\xe6path\teasyPkg\nmod\teasyPkg\t(devel)\t\nbuild\t-compiler=gccgo\nbuild\tCGO_ENABLED=1\nbuild\tCGO_CFLAGS=\nbuild\tCGO_CPPFLAGS=\nbuild\tCGO_CXXFLAGS=\nbuild\tCGO_LDFLAGS=\nbuild\tGOARCH=amd64\nbuild\tGOEXPERIMENT=fieldtrack\nbuild\tGOOS=linux\nbuild\tGOAMD64=v1\n\xf92C1\x86\x18
r\x00\x82B\x10A\x16\xd8\xf2"
EOF
mkdir -p $WORK/b001/exe/
cd .
/data/mygo/gollvm_workarea/install/bin/llvm-goc -o $WORK/b001/exe/a.out
"-Wl,-(" -m64 -Wl,--whole-archive $WORK/b001/_pkg_.a $WORK/b002/_pkg_.a
-Wl,--no-whole-archive "-Wl,-)"
-Wl,--build-id=0x6b376a38547962446f5337585f526e576b335a452f626c7a444534433856426a4e6a744e6866714b562f586d4a7278396231457475304f2d6e6b72326a742f6b376a38547962446f5337585f526e576b335a45
/data/mygo/gollvm_workarea/install/tools/buildid -w $WORK/b001/exe/a.out #
internal
cp $WORK/b001/exe/a.out easyPkg
rm -r $WORK/b001/
```
在2022年10月28日星期五 UTC+8 14:17:46<Ian Lance Taylor> 写道：
> Thanks. What I meant was that you showed us the errors from the generated
> shell script, but you didn't show us the commands being run by the shell
> script that generated those errors. Trying running the script with the -x
> option.
>
> Ian
>
> On Thu, Oct 27, 2022, 7:05 PM 'Qingwei Li' via golang-nuts <
> [email protected]> wrote:
>
>> commands I executed are as follows.
>>
>> ```bash
>> go build -x . 2> auto.sh # get the building process
>> rm easyPkg # remove the binary file
>> go clean -cache # clean the cache for rebuilding
>> source auto.sh # rebuild
>> ```
>>
>> the llvm-project is built by following instructions in section "On
>> Unix-like Systems > Build LLVM and Clang:" in
>> https://clang.llvm.org/get_started.html
>> and replace "Unix Makefiles" with "Ninja" and "make" with "ninja"
>>
>> LLVM version is 15.0.0
>>
>> gollvm version is
>>
>> ```
>> go version go1.18 gollvm LLVM 15.0.0git 20220823 (experimental)
>> linux/amd64
>> ```
>>
>> 在2022年10月28日星期五 UTC+8 00:55:03<Ian Lance Taylor> 写道：
>>
>>> On Thu, Oct 27, 2022 at 9:11 AM 'Than McIntosh' via golang-nuts
>>> <[email protected]> wrote:
>>> >
>>> > >/data/mygo/gollvm_workarea/install/bin/llvm-goc: error: unrecognized
>>> command line option '-fgo-importcfg=/dev/null'
>>> >
>>> > The Go command only passes this option to the compiler if it thinks
>>> that the compiler is the main go compiler ("gc") as opposed to gollvm. What
>>> output do you get when you run "go version" ?
>>>
>>> The code is testing whether the compiler supports that option. The
>>> errors about -fgo-importcfg and -ffile-prefix-map can be ignored.
>>>
>>> Not sure what is happening elsewhere, though. You showed the output
>>> but not the commands.
>>>
>>> Ian
>>>
>>>
>>>
>>> > On Thu, Oct 27, 2022 at 12:05 PM 'Qingwei Li' via golang-nuts <
>>> [email protected]> wrote:
>>> >>
>>> >> the GoLLVM is based on LLVM 15.0.0
>>> >>
>>> >> Example to reproduce:
>>> >> The structure of project is as follows:
>>> >>
>>> >> ```
>>> >> easyPkg/
>>> >> ├── go.mod
>>> >> ├── main.go
>>> >> └── Pkg
>>> >> └── utils.go
>>> >> ```
>>> >>
>>> >> main.go
>>> >>
>>> >> ```
>>> >> package main
>>> >>
>>> >> import "easyPkg/Pkg"
>>> >>
>>> >> func main() {
>>> >> Pkg.PkgFunc()
>>> >> }
>>> >> ```
>>> >>
>>> >> utils.go
>>> >>
>>> >> ```
>>> >> package Pkg
>>> >>
>>> >> func PkgFunc() {
>>> >> println("pkgFunc")
>>> >> }
>>> >> ```
>>> >>
>>> >> go.mod
>>> >>
>>> >> ```
>>> >> module easyPkg
>>> >>
>>> >> go 1.18
>>> >> ```
>>> >>
>>> >> use `go build -x . 2> auto.sh` to get the building process. Then
>>> delete the generated binary file `easyPkg` and use `go clean -cache` to
>>> clean the building cache. Then I use the command `source auto.sh` to
>>> regenerate the binary, which fails.
>>> >>
>>> >> part of the error log is as follows
>>> >>
>>> >> ```
>>> >> /data/mygo/gollvm_workarea/install/bin/llvm-goc: error: unrecognized
>>> command line option '-fgo-importcfg=/dev/null'
>>> >> /data/mygo/gollvm_workarea/install/bin/llvm-goc: error: unrecognized
>>> command line option '-ffile-prefix-map=a=b'
>>> >> ./main.go:3:19: error:
>>> /tmp/go-build3415416681/b001/_importcfgroot_/easyPkg/libPkg.a exists but
>>> does not contain any Go export data
>>> >> ./main.go:3:19: warning: easyPkg/Pkg: Not a directory
>>> >> ./main.go:3:19: error: import file 'easyPkg/Pkg' not found
>>> >> ./main.go:6:2: error: reference to undefined name 'Pkg'
>>> >> /usr/bin/ld.gold: error: /tmp/go-build3415416681/b001/_pkg_.a: member
>>> at 72 is not an ELF object
>>> >> /usr/bin/ld.gold: error: /tmp/go-build3415416681/b002/_pkg_.a: member
>>> at 72 is not an ELF object
>>> >> buildid: open /tmp/go-build3415416681/b001/exe/a.out: no such file or
>>> directory
>>> >> ```
>>> >>
>>> >> what can I do on the auto.sh script to regenerate the binary file? Is
>>> the process dumped completed?
>>> >>
>>> >> On a single package with no subdirectory, the result of `go build -x
>>> .` is available for regenerating the binary file.
>>> >>
>>> >> Moreover, my main purpose is to add -emit-llvm option wherever
>>> `llvm-goc` appears and use `llvm-link -S` to link all object files
>>> generated by llvm-goc to get a whole LLVM IR file for the whole project. If
>>> the question above is now insoluble, is there any other way to get the
>>> whole project's LLVM IR?
>>> >>
>>> >>
>>> >> --
>>> >> You received this message because you are subscribed to the Google
>>> Groups "golang-nuts" group.
>>> >> To unsubscribe from this group and stop receiving emails from it,
>>> send an email to [email protected].
>>> >> To view this discussion on the web visit
>>> https://groups.google.com/d/msgid/golang-nuts/b120de38-d603-4a8d-a029-34351abc051cn%40googlegroups.com.
>>>
>>>
>>> >
>>> > --
>>> > You received this message because you are subscribed to the Google
>>> Groups "golang-nuts" group.
>>> > To unsubscribe from this group and stop receiving emails from it, send
>>> an email to [email protected].
>>> > To view this discussion on the web visit
>>> https://groups.google.com/d/msgid/golang-nuts/CA%2BUr55ENsDS_zpp0TCeyJDfh7jO%2B%3DQOcrfNs1zxqNBYjpPPvDw%40mail.gmail.com.
>>>
>>>
>>>
>> --
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>>
> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/golang-nuts/193d828b-1f57-4cf9-a661-849127823d0dn%40googlegroups.com
>>
>> <https://groups.google.com/d/msgid/golang-nuts/193d828b-1f57-4cf9-a661-849127823d0dn%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>
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