在编译iOS时，Qt Creator和Tesseract出现连接器错误

Question

当我尝试构建我的iOS应用程序时，出现以下链接器错误。将C++标准库设置为“libstdc ++”可能会解决此问题，但我不确定如何在QT creator中执行此操作。

Undefined symbols for architecture armv7:
  "tesseract::TessBaseAPI::End()", referenced from:
      Ocr::~Ocr() in ocr.o
  "tesseract::TessBaseAPI::SetImage(Pix const*)", referenced from:
      Ocr::recognize(char const*) in ocr.o
  "tesseract::TessBaseAPI::GetUTF8Text()", referenced from:
      Ocr::recognize(char const*) in ocr.o
  "_pixRead", referenced from:
      Ocr::recognize(char const*) in ocr.o
  "_pixDestroy", referenced from:
      Ocr::recognize(char const*) in ocr.o
  "tesseract::TessBaseAPI::TessBaseAPI()", referenced from:
      Ocr::Ocr(char const*) in ocr.o
  "tesseract::TessBaseAPI::Init(char const*, char const*, tesseract::OcrEngineMode, char**, int, GenericVector<STRING> const*, GenericVector<STRING> const*, bool)", referenced from:
      Ocr::Ocr(char const*) in ocr.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

.pro 文件的相关部分

QMAKE_CXXFLAGS = -stdlib=libstdc++

macx: LIBS += -L$$PWD/TesseractOCR/lib/ -llept

INCLUDEPATH += $$PWD/TesseractOCR/include
DEPENDPATH += $$PWD/TesseractOCR/include

macx: PRE_TARGETDEPS += $$PWD/TesseractOCR/lib/liblept.a

macx: LIBS += -L$$PWD/TesseractOCR/lib/ -ltesseract_all

INCLUDEPATH += $$PWD/TesseractOCR/include
DEPENDPATH += $$PWD/TesseractOCR/include

macx: PRE_TARGETDEPS += $$PWD/TesseractOCR/lib/libtesseract_all.a

- user3048641

---

我也遇到了这个错误。你找到解决方法了吗？ - Mani

Answer 1

在构建 iOS 应用时，您需要将 macx 替换为 ios。

我还假设您尚未为 iOS 交叉编译 tesseract。这篇文章描述了该过程，其中还包含了一个针对 tesseract 及其依赖项的链接。

- Klathzazt