When testing the code on PC there were errors in the Go code, but they are
unrelated to the build errors from libtesseract.so:
```
package main
import (
"io/ioutil"
"os"
"fmt"
"log"
"github.com/otiai10/gosseract"
)
func main() {
client := gosseract.NewClient()
defer client.Close()
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
log.Fatal("Error loading image from stdin: %v", err)
}
if err := client.SetImageFromBytes(b); err != nil {
log.Fatal("Invalid image format from stdin: %v", err)
}
hocr, err := client.HOCRText()
if err != nil {
log.Fatal("Error performing hOCR: %v", err)
}
fmt.Println(hocr)
}
```
Since I could build and run this program on my PC with no errors, it seems
to be related to the build toolchain on android. Apologise for the
confusion here! I filled a bug report on termux-packages
repository: https://github.com/termux/termux-packages/issues/5946
Best Regards,
Em quinta-feira, 15 de outubro de 2020 às 12:33:05 UTC-3, Ronoaldo Pereira
escreveu:
> Hi!
>
> I am trying to build a small utility using tesseract from a Go program,
> and instead of calling a subprocess and initializing the OCR engine every
> time I plan to run the OCR from a Go routine.
>
> I have this small code that uses a binding to tesseract:
>
> $ cat main.go
> package main
>
> import (
> "io/ioutil"
> "os"
> "fmt"
> "log"
>
> "github.com/otiai10/gosseract"
> )
>
> func main() {
> client := gosseract.NewClient()
> defer client.Close()
>
> b, err := ioutil.ReadAll(os.Stdin)
> if err != nil {
> log.Fatal("Error loading image from stdin: %v", err)
> }
> if err := client.SetImagesFromBytes(b); err != nil {
> log.Fatal("Invalid image format from stdin: %v", err)
> }
> hocr, err := client.HOCR()
> if err != nil {
> log.Fatal("Error performing hOCR: %v", err)
> }
> fmt.Println(hocr)
> }
>
> When I try to compile using the version 4.1.1 of tesseract (from pkg
> install tesseract inside Termux) I get this errors:
>
> # github.com/otiai10/gosseract
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `omp_get_thread_num'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_serialized_parallel'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_push_num_threads'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_for_static_init_4'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_end_serialized_parallel'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_global_thread_num'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_fork_call'
> /data/data/com.termux/files/usr/bin/arm-linux-androideabi-ld:
> /data/data/com.termux/files/usr/lib/libtesseract.so: undefined reference to
> `__kmpc_for_static_fini'
> clang-10: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
> I don't know if this issue is in my code, the lib binding or the Termux
> build of tesseract. Any help to dissect this will be apreciated!
>
> Best regards,
>
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