https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1095196
https://bugs.kde.org/show_bug.cgi?id=498240
https://github.com/zxing-cpp/zxing-cpp/issues/900

From 82806f5f92173b8cb4e1e9bee13a2d07a33fb69f Mon Sep 17 00:00:00 2001
From: axxel <awagger@gmail.com>
Date: Sun, 5 Jan 2025 23:41:29 +0100
Subject: [PATCH] c++: fix improper use of NDEBUG

Thanks to Antonio Rojas for pointing it out to me.
--- a/core/src/HybridBinarizer.cpp
+++ b/core/src/HybridBinarizer.cpp
@@ -143,7 +143,7 @@ static std::shared_ptr<BitMatrix> CalculateMatrix(const uint8_t* __restrict lumi
 {
 	auto matrix = std::make_shared<BitMatrix>(width, height);
 
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 	Matrix<uint8_t> out(width, height);
 	Matrix<uint8_t> out2(width, height);
 #endif
@@ -163,7 +163,7 @@ static std::shared_ptr<BitMatrix> CalculateMatrix(const uint8_t* __restrict lumi
 			int average = sum / 25;
 			ThresholdBlock(luminances, xoffset, yoffset, average, rowStride, *matrix);
 
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 			for (int yy = 0; yy < 8; ++yy)
 				for (int xx = 0; xx < 8; ++xx) {
 					out.set(xoffset + xx, yoffset + yy, blackPoints(x, y));
@@ -173,7 +173,7 @@ static std::shared_ptr<BitMatrix> CalculateMatrix(const uint8_t* __restrict lumi
 		}
 	}
 
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 	std::ofstream file("thresholds.pnm");
 	file << "P5\n" << out.width() << ' ' << out.height() << "\n255\n";
 	file.write(reinterpret_cast<const char*>(out.data()), out.size());
@@ -260,7 +260,7 @@ static std::shared_ptr<BitMatrix> ThresholdImage(const ImageView iv, const Matri
 {
 	auto matrix = std::make_shared<BitMatrix>(iv.width(), iv.height());
 
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 	Matrix<uint8_t> out(iv.width(), iv.height());
 #endif
 
@@ -270,7 +270,7 @@ static std::shared_ptr<BitMatrix> ThresholdImage(const ImageView iv, const Matri
 			int xoffset = std::min(x * BLOCK_SIZE, iv.width() - BLOCK_SIZE);
 			ThresholdBlock(iv.data(), xoffset, yoffset, thresholds(x, y), iv.rowStride(), *matrix);
 
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 			for (int yy = 0; yy < 8; ++yy)
 				for (int xx = 0; xx < 8; ++xx)
 					out.set(xoffset + xx, yoffset + yy, thresholds(x, y));
@@ -278,7 +278,7 @@ static std::shared_ptr<BitMatrix> ThresholdImage(const ImageView iv, const Matri
 		}
 	}
 
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 	std::ofstream file("thresholds_new.pnm");
 	file << "P5\n" << out.width() << ' ' << out.height() << "\n255\n";
 	file.write(reinterpret_cast<const char*>(out.data()), out.size());
--- a/core/src/oned/ODDataBarCommon.h
+++ b/core/src/oned/ODDataBarCommon.h
@@ -37,7 +37,7 @@ inline bool IsFinder(int a, int b, int c, int d, int e)
 //			 (c < 5 + 10 * e) &&
 			 (a < 2 + 4 * e) &&
 			 (4 * a > n);
-#if !defined(NDEBUG) && 0
+#if defined(PRINT_DEBUG) && 0
 	printf("[");
 	for (bool v :
 		 {w + 5 > 9 * n,
--- a/test/unit/datamatrix/DMEncodeDecodeTest.cpp
+++ b/test/unit/datamatrix/DMEncodeDecodeTest.cpp
@@ -21,7 +21,7 @@ namespace {
 		ASSERT_EQ(matrix.empty(), false);
 
 		DecoderResult res = DataMatrix::Decode(matrix);
-#ifndef NDEBUG
+#ifdef PRINT_DEBUG
 		if (!res.isValid() || data != res.text())
 			SaveAsPBM(matrix, "failed-datamatrix.pbm", 4);
 #endif