HaikuArchives · korli · Feb 18, 2026 · Feb 17, 2026
diff --git a/Makefile b/Makefile
@@ -122,7 +122,7 @@ LOCAL_INCLUDE_PATHS =
 
 #	specify the level of optimization that you desire
 #	NONE, SOME, FULL
-OPTIMIZE=
+OPTIMIZE= FULL
 
 # 	specify here the codes for languages you are going
 # 	to support in this application. The default "en"
@@ -143,7 +143,7 @@ DEFINES=
 #	if unspecified default warnings will be used
 #	NONE = supress all warnings
 #	ALL = enable all warnings
-WARNINGS =
+WARNINGS = ALL
 
 #	specify whether image symbols will be created
 #	so that stack crawls in the debugger are meaningful
@@ -156,7 +156,7 @@ SYMBOLS =
 DEBUGGER =
 
 #	specify additional compiler flags for all files
-COMPILER_FLAGS =
+COMPILER_FLAGS = -Werror
 
 #	specify additional linker flags
 LINKER_FLAGS =

diff --git a/addons/AddOns/AdaptiveHistogramEqualization/Makefile b/addons/AddOns/AdaptiveHistogramEqualization/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/AntiDitherer/AntiDitherer.cpp b/addons/AddOns/AntiDitherer/AntiDitherer.cpp
@@ -155,9 +155,6 @@ AntiDithererManipulator::anti_dither()
 	if (selection != NULL && selection->IsEmpty() == false)
 		bounds = selection->GetBoundingRect();
 
-	int32 width = bounds.IntegerWidth();
-	int32 height = bounds.IntegerHeight();
-
 	float bounds_left = bounds.left;
 	float bounds_right = bounds.right;
 	float bounds_top = bounds.top;

diff --git a/addons/AddOns/AntiDitherer/Makefile b/addons/AddOns/AntiDitherer/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/Blur/Blur.cpp b/addons/AddOns/Blur/Blur.cpp
@@ -94,10 +94,6 @@ BlurManipulator::ManipulateBitmap(
 		return NULL;
 	}
 
-	BBitmap* source_bitmap;
-	BBitmap* target_bitmap;
-	BBitmap* new_bitmap = NULL;
-
 	return original;
 }
 

diff --git a/addons/AddOns/Blur/Makefile b/addons/AddOns/Blur/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/Brightness/Brightness.cpp b/addons/AddOns/Brightness/Brightness.cpp
@@ -212,7 +212,6 @@ BrightnessManipulator::thread_function(int32 thread_number)
 		float missed_update = 0;
 
 		// Loop through all pixels in original.
-		uint32 sum;
 		brightness *= 3;
 		uint8 brighness_array[256];
 		for (int32 i = 0; i < 256; i++)

diff --git a/addons/AddOns/Brightness/Makefile b/addons/AddOns/Brightness/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/ColorBalance/Makefile b/addons/AddOns/ColorBalance/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/ColorReducer/Makefile b/addons/AddOns/ColorReducer/Makefile
@@ -94,7 +94,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -112,7 +112,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -123,7 +123,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/ColorReducer/color_mapper.cpp b/addons/AddOns/ColorReducer/color_mapper.cpp
@@ -218,9 +218,6 @@ preserve_solids_fs_color_mapper(BBitmap* inSource, const rgb_color* inPalette, i
 	int32 width = inSource->Bounds().IntegerWidth();
 	int32 height = inSource->Bounds().IntegerHeight();
 
-	int32 source_padding = source_bpr - width - 1;
-	int32 destination_padding = destination_bpr - width - 1;
-
 	// We use three error arrays and three side error variables.
 	// The error arrays are a little bit wider than the image to
 	// avoid cheking for border conditions

diff --git a/addons/AddOns/ColorReducer/palette_generator.cpp b/addons/AddOns/ColorReducer/palette_generator.cpp
@@ -122,7 +122,7 @@ gla_palette(BBitmap* inBitmap, int paletteSize)
 			list_count++;
 		}
 	}
-	printf("Number of lists is %d, average length %f\n", list_count,
+	printf("Number of lists is %" B_PRId32 ", average length %f\n", list_count,
 		total_length / (float)list_count);
 
 	// Initialize the palette.
@@ -218,7 +218,7 @@ gla_palette(BBitmap* inBitmap, int paletteSize)
 			palette_still_improving = true;
 	}
 
-	printf("Number of iterations %d\n", number_of_iterations);
+	printf("Number of iterations %" B_PRId32 "\n", number_of_iterations);
 
 	delete[] previous_palette;
 	delete color_metric;

diff --git a/addons/AddOns/ColorSeparator/Makefile b/addons/AddOns/ColorSeparator/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/Contrast/Contrast.cpp b/addons/AddOns/Contrast/Contrast.cpp
@@ -147,7 +147,7 @@ ContrastManipulator::CalculateAverageLuminance(BBitmap* bitmap)
 		uint32 word;
 	} color;
 
-	for (int32 i = 0; i < bits_length; i++) {
+	for (uint32 i = 0; i < bits_length; i++) {
 		color.word = *bits++;
 		luminance_sum += 0.299 * color.bytes[0] + 0.587 * color.bytes[1] + 0.144 * color.bytes[2];
 	}
@@ -245,7 +245,6 @@ ContrastManipulator::thread_function(int32 thread_number)
 		float missed_update = 0;
 
 		// Loop through all pixels in original.
-		uint32 sum;
 		contrast *= 3;
 		for (int32 y = top; y <= bottom; y += step) {
 			int32 y_times_source_bpr = y * source_bpr;

diff --git a/addons/AddOns/Contrast/Makefile b/addons/AddOns/Contrast/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/ContrastManipulator/Makefile b/addons/AddOns/ContrastManipulator/Makefile
@@ -92,7 +92,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -110,7 +110,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -121,7 +121,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/Dispersion/Makefile b/addons/AddOns/Dispersion/Makefile
@@ -93,7 +93,7 @@ LOCAL_INCLUDE_PATHS = ${Addon-Includes}
 
 #	Specify the level of optimization that you want. Specify either NONE (O0),
 #	SOME (O1), FULL (O2), or leave blank (for the default optimization level).
-OPTIMIZE := 
+OPTIMIZE := FULL
 
 # 	Specify the codes for languages you are going to support in this
 # 	application. The default "en" one must be provided too. "make catkeys"
@@ -111,7 +111,7 @@ DEFINES =
 
 #	Specify the warning level. Either NONE (suppress all warnings),
 #	ALL (enable all warnings), or leave blank (enable default warnings).
-WARNINGS = 
+WARNINGS = ALL
 
 #	With image symbols, stack crawls in the debugger are meaningful.
 #	If set to "TRUE", symbols will be created.
@@ -122,7 +122,7 @@ SYMBOLS :=
 DEBUGGER := 
 
 #	Specify any additional compiler flags to be used.
-COMPILER_FLAGS = 
+COMPILER_FLAGS = -Werror
 
 #	Specify any additional linker flags to be used.
 LINKER_FLAGS = 

diff --git a/addons/AddOns/EdgeDetector/DetectEdges.cpp b/addons/AddOns/EdgeDetector/DetectEdges.cpp
@@ -69,7 +69,7 @@ DetectEdgesManipulator::ManipulateBitmap(BBitmap* original, BStatusBar* status_b
 		// convolution to work properly.
 		duplicate = DuplicateBitmap(original, -1);
 	}
-	catch (std::bad_alloc e) {
+	catch (const std::bad_alloc& e) {
 		// Here we could clean up if there was need for that.
 		return NULL; // Returning NULL means that the image did not change.
 	}