Add compatibility check in godalGridCreate, update test behaviour

godal.cpp

@@ -1696,10 +1696,15 @@ void test_godal_error_handling(cctx *ctx) {
 void godalGridCreate(cctx *ctx, char *pszAlgorithm, GDALGridAlgorithm eAlgorithm, GUInt32 nPoints, const double *padfX, const double *padfY, const double *padfZ, double dfXMin,
 					double dfXMax, double dfYMin, double dfYMax, GUInt32 nXSize, GUInt32 nYSize, GDALDataType eType, void *pData) {
 	godalWrap(ctx);
-
 	CPLErr ret;
-	void *ppOptions;
 
+	if (!GDALHasTriangulation() && eAlgorithm == GGA_Linear) {
+		CPLError(CE_Failure, CPLE_AppDefined, "unable to run GGA_Linear algorithm, since GDAL built without QHull support");
+		godalUnwrap();
+		return;
+	}
+
+	void *ppOptions;
 #if GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(3, 7, 0)
 	ret = GDALGridParseAlgorithmAndOptions(pszAlgorithm, &eAlgorithm, &ppOptions);
 #else

godal_test.go

@@ -25,6 +25,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"strings"
 	"syscall"
 	"testing"
 	"time"
@@ -3992,8 +3993,15 @@ func TestGridCreateLinear(t *testing.T) {
 	var gridCreateBindingPoints = make([]float64, outXSize*outYSize)
 	err = GridCreate("linear", xCoords, yCoords, zCoords, 0, 1, 0, 1, outXSize, outYSize, gridCreateBindingPoints)
 	if err != nil {
-		t.Error(err)
-		return
+		// Handles QHull error differently here, as it's a compatibility issue not a gridding error
+		isQhullError := strings.HasSuffix(err.Error(), "without QHull support")
+		if isQhullError {
+			t.Log(`Skipping test, GDAL was built without "Delaunay triangulation" support which is required for the "Linear" gridding algorithm`)
+			return
+		} else {
+			t.Error(err)
+			return
+		}
 	}
 
 	var (