check TessAPI

Author: pachadotdev

.github/workflows/clang19.yaml

@@ -4,7 +4,7 @@ on:
   pull_request:
     branches: [main, master]
 
-name: "clang 19"
+name: "clang19-rhub"
 
 jobs:
   check:

.github/workflows/gcc14.yaml

@@ -0,0 +1,22 @@
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+name: "gcc14-rhub"
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/r-hub/containers/gcc14:latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        R -q -e 'pak::pkg_install(c("deps::.", "any::rcmdcheck"), dependencies = TRUE)'
+
+    - uses: r-lib/actions/check-r-package@v2

configure

@@ -65,7 +65,27 @@ else
 CXX11CPP=`${R_HOME}/bin/R CMD config CXXCPP`
 fi
 
-# Create a temporary C++ file to test the compatibility with Tesseract
+# Create temporary C++ files to test the compatibility with Tesseract
+cat <<EOF > conftest.cpp
+#include <tesseract/baseapi.h>
+#include <string>
+
+int main() {
+  tesseract::TessBaseAPI api;
+  std::string val;
+  // This fails to link on older Tesseract
+  api.GetVariableAsString("test", &val);
+  return 0;
+}
+EOF
+
+if ${CXX11} -std=gnu++11 -c conftest.cpp -o conftest.o ${PKG_CFLAGS}; then
+  CXXFLAGS="$CXXFLAGS -DTESSERACT_HAS_GETVARIABLEASSTRING"
+  echo "Using GetVariableAsString()"
+else
+  echo "Using GetStringVariable()"
+fi
+
 cat <<EOF > conftest.cpp
 #include <tesseract/baseapi.h>
 #include <allheaders.h>

src/cpp11tesseract.cpp

@@ -124,7 +124,8 @@ tesseract::TessBaseAPI *get_engine(TessPtr engine) {
   writable::logicals out(params.size());
   STRING str;
   for (int i = 0; i < params.size(); i++) {
-#if TESSERACT_MAJOR_VERSION >= 5
+#if defined(TESSERACT_HAS_GETVARIABLEASSTRING)
+    // Use the newer API
     out[i] = api->GetVariableAsString(std::string(params.at(i)).c_str(), &str);
 #else
     const char *value =
@@ -175,7 +176,8 @@ tesseract::TessBaseAPI *get_engine(TessPtr engine) {
   std::vector<std::string> values;
   for (int i = 0; i < params.size(); ++i) {
     STRING str;
-#if TESSERACT_MAJOR_VERSION >= 5
+#if defined(TESSERACT_HAS_GETVARIABLEASSTRING)
+    // Use the newer API
     if (api->GetVariableAsString(std::string(params.at(i)).c_str(), &str)) {
       values.push_back(str);
 #else