diff --git a/include/asm/fixpoint.hpp b/include/asm/fixpoint.hpp
index 4dc99618..dd659de0 100644
--- a/include/asm/fixpoint.hpp
+++ b/include/asm/fixpoint.hpp
@@ -5,9 +5,6 @@
 
 #include <stdint.h>
 
-extern uint8_t fixPrecision;
-
-uint8_t fix_Precision();
 int32_t fix_Sin(int32_t i, int32_t q);
 int32_t fix_Cos(int32_t i, int32_t q);
 int32_t fix_Tan(int32_t i, int32_t q);
diff --git a/include/asm/fstack.hpp b/include/asm/fstack.hpp
index f6b0cb56..81aea529 100644
--- a/include/asm/fstack.hpp
+++ b/include/asm/fstack.hpp
@@ -47,8 +47,6 @@ struct FileStackNode {
 	std::string reptChain() const;
 };
 
-extern size_t maxRecursionDepth;
-
 struct MacroArgs;
 
 bool fstk_DumpCurrent();
diff --git a/include/asm/lexer.hpp b/include/asm/lexer.hpp
index a55532d3..5d4b0d0c 100644
--- a/include/asm/lexer.hpp
+++ b/include/asm/lexer.hpp
@@ -116,9 +116,6 @@ struct LexerState {
 	void clear(uint32_t lineNo_);
 };
 
-extern char binDigits[2];
-extern char gfxDigits[4];
-
 void lexer_SetBinDigits(char const digits[2]);
 void lexer_SetGfxDigits(char const digits[4]);
 
diff --git a/include/asm/main.hpp b/include/asm/main.hpp
index 220f73e1..a2e2e089 100644
--- a/include/asm/main.hpp
+++ b/include/asm/main.hpp
@@ -3,28 +3,51 @@
 #ifndef RGBDS_ASM_MAIN_HPP
 #define RGBDS_ASM_MAIN_HPP
 
+#include <stdint.h>
 #include <stdio.h>
 #include <string>
 
-extern bool verbose;
-
-#define verbosePrint(...) \
-	do { \
-		if (verbose) { \
-			fprintf(stderr, __VA_ARGS__); \
-		} \
-	} while (0)
-
 enum MissingInclude {
 	INC_ERROR,    // A missing included file is an error that halts assembly
 	GEN_EXIT,     // A missing included file is assumed to be generated; exit normally
 	GEN_CONTINUE, // A missing included file is assumed to be generated; continue assembling
 };
 
-extern FILE *dependFile;
-extern std::string targetFileName;
-extern MissingInclude missingIncludeState;
-extern bool generatePhonyDeps;
+struct Options {
+	uint8_t fixPrecision = 16;                      // -Q
+	size_t maxRecursionDepth;                       // -r
+	char binDigits[2] = {'0', '1'};                 // -b
+	char gfxDigits[4] = {'0', '1', '2', '3'};       // -g
+	bool verbose = false;                           // -v
+	FILE *dependFile = nullptr;                     // -M
+	std::string targetFileName;                     // -MQ, -MT
+	MissingInclude missingIncludeState = INC_ERROR; // -MC, -MG
+	bool generatePhonyDeps = false;                 // -MP
+	std::string objectFileName;                     // -o
+	uint8_t padByte = 0;                            // -p
+	unsigned int maxErrors = 0;                     // -X
+
+	~Options() {
+		if (dependFile) {
+			fclose(dependFile);
+		}
+	}
+
+	void printDep(std::string const &depName) {
+		if (dependFile) {
+			fprintf(dependFile, "%s: %s\n", targetFileName.c_str(), depName.c_str());
+		}
+	}
+};
+
+extern Options options;
 extern bool failedOnMissingInclude;
 
+#define verbosePrint(...) \
+	do { \
+		if (options.verbose) { \
+			fprintf(stderr, __VA_ARGS__); \
+		} \
+	} while (0)
+
 #endif // RGBDS_ASM_MAIN_HPP
diff --git a/include/asm/opt.hpp b/include/asm/opt.hpp
index a4f9f8e1..90364e14 100644
--- a/include/asm/opt.hpp
+++ b/include/asm/opt.hpp
@@ -5,10 +5,10 @@
 
 #include <stdint.h>
 
-void opt_B(char const chars[2]);
-void opt_G(char const chars[4]);
+void opt_B(char const binDigits[2]);
+void opt_G(char const gfxDigits[4]);
 void opt_P(uint8_t padByte);
-void opt_Q(uint8_t precision);
+void opt_Q(uint8_t fixPrecision);
 void opt_W(char const *flag);
 void opt_Parse(char const *option);
 
diff --git a/include/asm/output.hpp b/include/asm/output.hpp
index 0112e1e7..89c0154a 100644
--- a/include/asm/output.hpp
+++ b/include/asm/output.hpp
@@ -16,8 +16,6 @@ struct FileStackNode;
 
 enum StateFeature { STATE_EQU, STATE_VAR, STATE_EQUS, STATE_CHAR, STATE_MACRO, NB_STATE_FEATURES };
 
-extern std::string objectFileName;
-
 void out_RegisterNode(std::shared_ptr<FileStackNode> node);
 void out_SetFileName(std::string const &name);
 void out_CreatePatch(uint32_t type, Expression const &expr, uint32_t ofs, uint32_t pcShift);
diff --git a/include/asm/section.hpp b/include/asm/section.hpp
index 184eedf0..52791060 100644
--- a/include/asm/section.hpp
+++ b/include/asm/section.hpp
@@ -12,8 +12,6 @@
 
 #include "linkdefs.hpp"
 
-extern uint8_t fillByte;
-
 struct Expression;
 struct FileStackNode;
 struct Section;
diff --git a/include/asm/warning.hpp b/include/asm/warning.hpp
index 5df8b8e5..6862aeed 100644
--- a/include/asm/warning.hpp
+++ b/include/asm/warning.hpp
@@ -7,7 +7,7 @@
 
 #include "diagnostics.hpp"
 
-extern unsigned int nbErrors, maxErrors;
+extern unsigned int nbErrors;
 
 enum WarningLevel {
 	LEVEL_DEFAULT,    // Warnings that are enabled by default
diff --git a/src/asm/fixpoint.cpp b/src/asm/fixpoint.cpp
index 152a4118..79061500 100644
--- a/src/asm/fixpoint.cpp
+++ b/src/asm/fixpoint.cpp
@@ -10,12 +10,6 @@
 	#define M_PI 3.14159265358979323846
 #endif
 
-uint8_t fixPrecision;
-
-uint8_t fix_Precision() {
-	return fixPrecision;
-}
-
 static double fix2double(int32_t i, int32_t q) {
 	return i / pow(2.0, q);
 }
diff --git a/src/asm/format.cpp b/src/asm/format.cpp
index 7599010e..266032eb 100644
--- a/src/asm/format.cpp
+++ b/src/asm/format.cpp
@@ -10,6 +10,7 @@
 #include <string.h>
 
 #include "asm/fixpoint.hpp"
+#include "asm/main.hpp" // options
 #include "asm/warning.hpp"
 
 void FormatSpec::useCharacter(int c) {
@@ -258,7 +259,7 @@ void FormatSpec::appendNumber(std::string &str, uint32_t value) const {
 			useFracWidth = 255;
 		}
 
-		size_t defaultPrec = fix_Precision();
+		size_t defaultPrec = options.fixPrecision;
 		size_t usePrec = hasPrec ? precision : defaultPrec;
 		if (usePrec < 1 || usePrec > 31) {
 			error(
diff --git a/src/asm/fstack.cpp b/src/asm/fstack.cpp
index 8ef4afbd..78e564be 100644
--- a/src/asm/fstack.cpp
+++ b/src/asm/fstack.cpp
@@ -42,7 +42,6 @@ struct Context {
 };
 
 static std::stack<Context> contextStack;
-size_t maxRecursionDepth;
 
 // The first include path for `fstk_FindFile` to try is none at all
 static std::vector<std::string> includePaths = {""};
@@ -134,11 +133,9 @@ static bool isValidFilePath(std::string const &path) {
 }
 
 static void printDep(std::string const &path) {
-	if (dependFile) {
-		fprintf(dependFile, "%s: %s\n", targetFileName.c_str(), path.c_str());
-		if (generatePhonyDeps && isValidFilePath(path)) {
-			fprintf(dependFile, "%s:\n", path.c_str());
-		}
+	options.printDep(path);
+	if (options.dependFile && options.generatePhonyDeps && isValidFilePath(path)) {
+		fprintf(options.dependFile, "%s:\n", path.c_str());
 	}
 }
 
@@ -151,7 +148,7 @@ std::optional<std::string> fstk_FindFile(std::string const &path) {
 	}
 
 	errno = ENOENT;
-	if (missingIncludeState != INC_ERROR) {
+	if (options.missingIncludeState != INC_ERROR) {
 		printDep(path);
 	}
 	return std::nullopt;
@@ -212,8 +209,8 @@ bool yywrap() {
 }
 
 static void checkRecursionDepth() {
-	if (contextStack.size() > maxRecursionDepth) {
-		fatal("Recursion limit (%zu) exceeded", maxRecursionDepth);
+	if (contextStack.size() > options.maxRecursionDepth) {
+		fatal("Recursion limit (%zu) exceeded", options.maxRecursionDepth);
 	}
 }
 
@@ -304,18 +301,18 @@ static Context &newReptContext(int32_t reptLineNo, ContentSpan const &span, uint
 }
 
 bool fstk_FileError(std::string const &path, char const *functionName) {
-	if (missingIncludeState == INC_ERROR) {
+	if (options.missingIncludeState == INC_ERROR) {
 		error("Error opening %s file '%s': %s", functionName, path.c_str(), strerror(errno));
 	} else {
 		failedOnMissingInclude = true;
 		// LCOV_EXCL_START
-		if (missingIncludeState == GEN_EXIT) {
+		if (options.missingIncludeState == GEN_EXIT) {
 			verbosePrint(
 			    "Aborting (-MG) on %s file '%s' (%s)\n", functionName, path.c_str(), strerror(errno)
 			);
 			return true;
 		}
-		assume(missingIncludeState == GEN_CONTINUE);
+		assume(options.missingIncludeState == GEN_CONTINUE);
 		// LCOV_EXCL_STOP
 	}
 	return false;
@@ -406,13 +403,13 @@ void fstk_NewRecursionDepth(size_t newDepth) {
 	if (contextStack.size() > newDepth + 1) {
 		fatal("Recursion limit (%zu) exceeded", newDepth);
 	}
-	maxRecursionDepth = newDepth;
+	options.maxRecursionDepth = newDepth;
 }
 
 void fstk_Init(std::string const &mainPath, size_t maxDepth) {
 	newFileContext(mainPath, true);
 
-	maxRecursionDepth = maxDepth;
+	options.maxRecursionDepth = maxDepth;
 
 	for (std::string const &name : preIncludeNames) {
 		if (std::optional<std::string> fullPath = fstk_FindFile(name); fullPath) {
diff --git a/src/asm/lexer.cpp b/src/asm/lexer.cpp
index 9927849a..cdc9505b 100644
--- a/src/asm/lexer.cpp
+++ b/src/asm/lexer.cpp
@@ -587,8 +587,8 @@ static void beginExpansion(std::shared_ptr<std::string> str, std::optional<std::
 }
 
 void lexer_CheckRecursionDepth() {
-	if (lexerState->expansions.size() > maxRecursionDepth + 1) {
-		fatal("Recursion limit (%zu) exceeded", maxRecursionDepth);
+	if (lexerState->expansions.size() > options.maxRecursionDepth + 1) {
+		fatal("Recursion limit (%zu) exceeded", options.maxRecursionDepth);
 	}
 }
 
@@ -1043,10 +1043,10 @@ static uint32_t readFractionalPart(uint32_t integer) {
 		if (state >= READFRACTIONALPART_PRECISION) {
 			error("Invalid fixed-point constant, no significant digits after 'q'");
 		}
-		precision = fixPrecision;
+		precision = options.fixPrecision;
 	} else if (precision > 31) {
 		error("Fixed-point constant precision must be between 1 and 31");
-		precision = fixPrecision;
+		precision = options.fixPrecision;
 	}
 
 	if (integer >= (1ULL << (32 - precision))) {
@@ -1060,9 +1060,6 @@ static uint32_t readFractionalPart(uint32_t integer) {
 	return (integer << precision) | fractional;
 }
 
-char binDigits[2];
-char gfxDigits[4];
-
 static bool isValidDigit(char c) {
 	return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '.'
 	       || c == '#' || c == '@';
@@ -1094,14 +1091,14 @@ static bool checkDigitErrors(char const *digits, size_t n, char const *type) {
 }
 
 void lexer_SetBinDigits(char const digits[2]) {
-	if (size_t n = std::size(binDigits); checkDigitErrors(digits, n, "binary")) {
-		memcpy(binDigits, digits, n);
+	if (size_t n = std::size(options.binDigits); checkDigitErrors(digits, n, "binary")) {
+		memcpy(options.binDigits, digits, n);
 	}
 }
 
 void lexer_SetGfxDigits(char const digits[4]) {
-	if (size_t n = std::size(gfxDigits); checkDigitErrors(digits, n, "graphics")) {
-		memcpy(gfxDigits, digits, n);
+	if (size_t n = std::size(options.gfxDigits); checkDigitErrors(digits, n, "graphics")) {
+		memcpy(options.gfxDigits, digits, n);
 	}
 }
 
@@ -1114,9 +1111,9 @@ static uint32_t readBinaryNumber() {
 
 		if (c == '_' && !empty) {
 			continue;
-		} else if (c == '0' || c == binDigits[0]) {
+		} else if (c == '0' || c == options.binDigits[0]) {
 			bit = 0;
-		} else if (c == '1' || c == binDigits[1]) {
+		} else if (c == '1' || c == options.binDigits[1]) {
 			bit = 1;
 		} else {
 			break;
@@ -1227,13 +1224,13 @@ static uint32_t readGfxConstant() {
 
 		if (c == '_' && width > 0) {
 			continue;
-		} else if (c == '0' || c == gfxDigits[0]) {
+		} else if (c == '0' || c == options.gfxDigits[0]) {
 			pixel = 0;
-		} else if (c == '1' || c == gfxDigits[1]) {
+		} else if (c == '1' || c == options.gfxDigits[1]) {
 			pixel = 1;
-		} else if (c == '2' || c == gfxDigits[2]) {
+		} else if (c == '2' || c == options.gfxDigits[2]) {
 			pixel = 2;
-		} else if (c == '3' || c == gfxDigits[3]) {
+		} else if (c == '3' || c == options.gfxDigits[3]) {
 			pixel = 3;
 		} else {
 			break;
@@ -1297,8 +1294,8 @@ static Token readIdentifier(char firstChar, bool raw) {
 // Functions to read strings
 
 static std::shared_ptr<std::string> readInterpolation(size_t depth) {
-	if (depth > maxRecursionDepth) {
-		fatal("Recursion limit (%zu) exceeded", maxRecursionDepth);
+	if (depth > options.maxRecursionDepth) {
+		fatal("Recursion limit (%zu) exceeded", options.maxRecursionDepth);
 	}
 
 	std::string fmtBuf;
@@ -1891,7 +1888,8 @@ static Token yylex_NORMAL() {
 			if (c == '=') {
 				shiftChar();
 				return Token(T_(POP_MODEQ));
-			} else if (c == '0' || c == '1' || c == binDigits[0] || c == binDigits[1]) {
+			} else if (c == '0' || c == '1' || c == options.binDigits[0]
+			           || c == options.binDigits[1]) {
 				return Token(T_(NUMBER), readBinaryNumber());
 			}
 			return Token(T_(OP_MOD));
diff --git a/src/asm/main.cpp b/src/asm/main.cpp
index e6bae650..fda3b356 100644
--- a/src/asm/main.cpp
+++ b/src/asm/main.cpp
@@ -24,12 +24,8 @@
 #include "asm/symbol.hpp"
 #include "asm/warning.hpp"
 
-bool verbose = false; // -v
+Options options;
 
-FILE *dependFile = nullptr;                     // -M
-MissingInclude missingIncludeState = INC_ERROR; // -MC, -MG
-bool generatePhonyDeps = false;                 // -MP
-std::string targetFileName;                     // -MQ, -MT
 bool failedOnMissingInclude = false;
 
 // Escapes Make-special chars from a string
@@ -178,20 +174,10 @@ int main(int argc, char *argv[]) {
 		now = static_cast<time_t>(strtoul(sourceDateEpoch, nullptr, 0));
 	}
 
-	Defer closeDependFile{[&] {
-		if (dependFile) {
-			fclose(dependFile);
-		}
-	}};
-
 	// Perform some init for below
 	sym_Init(now);
 
 	// Set defaults
-	opt_B("01");
-	opt_G("0123");
-	opt_P(0);
-	opt_Q(16);
 	sym_SetExportAll(false);
 	uint32_t maxDepth = 64;
 	char const *dependFileName = nullptr;
@@ -199,7 +185,7 @@ int main(int argc, char *argv[]) {
 	std::string newTarget;
 	// Maximum of 100 errors only applies if rgbasm is printing errors to a terminal.
 	if (isatty(STDERR_FILENO)) {
-		maxErrors = 100;
+		options.maxErrors = 100;
 	}
 
 	for (int ch; (ch = musl_getopt_long_only(argc, argv, optstring, longopts, nullptr)) != -1;) {
@@ -248,17 +234,17 @@ int main(int argc, char *argv[]) {
 			break;
 
 		case 'M':
-			if (dependFile) {
+			if (options.dependFile) {
 				warnx("Overriding dependfile %s", dependFileName);
 			}
 			if (strcmp("-", musl_optarg)) {
-				dependFile = fopen(musl_optarg, "w");
+				options.dependFile = fopen(musl_optarg, "w");
 				dependFileName = musl_optarg;
 			} else {
-				dependFile = stdout;
+				options.dependFile = stdout;
 				dependFileName = "<stdout>";
 			}
-			if (dependFile == nullptr) {
+			if (options.dependFile == nullptr) {
 				// LCOV_EXCL_START
 				fatal("Failed to open dependfile \"%s\": %s", dependFileName, strerror(errno));
 				// LCOV_EXCL_STOP
@@ -340,7 +326,7 @@ int main(int argc, char *argv[]) {
 
 		case 'v':
 			// LCOV_EXCL_START
-			verbose = true;
+			options.verbose = true;
 			break;
 			// LCOV_EXCL_STOP
 
@@ -352,34 +338,34 @@ int main(int argc, char *argv[]) {
 			warnings.state.warningsEnabled = false;
 			break;
 
-			unsigned long maxValue;
+			unsigned long maxErrors;
 		case 'X':
-			maxValue = strtoul(musl_optarg, &endptr, 0);
+			maxErrors = strtoul(musl_optarg, &endptr, 0);
 
 			if (musl_optarg[0] == '\0' || *endptr != '\0') {
 				fatal("Invalid argument for option 'X'");
 			}
 
-			if (maxValue > UINT_MAX) {
+			if (maxErrors > UINT_MAX) {
 				fatal("Argument for option 'X' must be between 0 and %u", UINT_MAX);
 			}
 
-			maxErrors = maxValue;
+			options.maxErrors = maxErrors;
 			break;
 
 		// Long-only options
 		case 0:
 			switch (depType) {
 			case 'C':
-				missingIncludeState = GEN_CONTINUE;
+				options.missingIncludeState = GEN_CONTINUE;
 				break;
 
 			case 'G':
-				missingIncludeState = GEN_EXIT;
+				options.missingIncludeState = GEN_EXIT;
 				break;
 
 			case 'P':
-				generatePhonyDeps = true;
+				options.generatePhonyDeps = true;
 				break;
 
 			case 'Q':
@@ -388,10 +374,10 @@ int main(int argc, char *argv[]) {
 				if (depType == 'Q') {
 					newTarget = make_escape(newTarget);
 				}
-				if (!targetFileName.empty()) {
-					targetFileName += ' ';
+				if (!options.targetFileName.empty()) {
+					options.targetFileName += ' ';
 				}
-				targetFileName += newTarget;
+				options.targetFileName += newTarget;
 				break;
 			}
 			break;
@@ -405,8 +391,8 @@ int main(int argc, char *argv[]) {
 		}
 	}
 
-	if (targetFileName.empty() && !objectFileName.empty()) {
-		targetFileName = objectFileName;
+	if (options.targetFileName.empty() && !options.objectFileName.empty()) {
+		options.targetFileName = options.objectFileName;
 	}
 
 	if (argc == musl_optind) {
@@ -419,14 +405,11 @@ int main(int argc, char *argv[]) {
 
 	verbosePrint("Assembling %s\n", mainFileName.c_str()); // LCOV_EXCL_LINE
 
-	if (dependFile) {
-		if (targetFileName.empty()) {
-			fatal("Dependency files can only be created if a target file is specified with either "
-			      "-o, -MQ or -MT");
-		}
-
-		fprintf(dependFile, "%s: %s\n", targetFileName.c_str(), mainFileName.c_str());
+	if (options.dependFile && options.targetFileName.empty()) {
+		fatal("Dependency files can only be created if a target file is specified with either "
+		      "-o, -MQ or -MT");
 	}
+	options.printDep(mainFileName);
 
 	charmap_New(DEFAULT_CHARMAP_NAME, nullptr);
 
diff --git a/src/asm/opt.cpp b/src/asm/opt.cpp
index 61e02cc5..84b0a3c2 100644
--- a/src/asm/opt.cpp
+++ b/src/asm/opt.cpp
@@ -12,6 +12,7 @@
 #include "asm/fixpoint.hpp"
 #include "asm/fstack.hpp"
 #include "asm/lexer.hpp"
+#include "asm/main.hpp" // options
 #include "asm/section.hpp"
 #include "asm/warning.hpp"
 
@@ -19,31 +20,31 @@ struct OptStackEntry {
 	char binDigits[2];
 	char gfxDigits[4];
 	uint8_t fixPrecision;
-	uint8_t fillByte;
+	uint8_t padByte;
 	size_t maxRecursionDepth;
 	DiagnosticsState<WarningID> warningStates;
 };
 
 static std::stack<OptStackEntry> stack;
 
-void opt_B(char const chars[2]) {
-	lexer_SetBinDigits(chars);
+void opt_B(char const binDigits[2]) {
+	lexer_SetBinDigits(binDigits);
 }
 
-void opt_G(char const chars[4]) {
-	lexer_SetGfxDigits(chars);
+void opt_G(char const gfxDigits[4]) {
+	lexer_SetGfxDigits(gfxDigits);
 }
 
 void opt_P(uint8_t padByte) {
-	fillByte = padByte;
+	options.padByte = padByte;
 }
 
-void opt_Q(uint8_t precision) {
-	fixPrecision = precision;
+void opt_Q(uint8_t fixPrecision) {
+	options.fixPrecision = fixPrecision;
 }
 
-void opt_R(size_t newDepth) {
-	fstk_NewRecursionDepth(newDepth);
+void opt_R(size_t maxRecursionDepth) {
+	fstk_NewRecursionDepth(maxRecursionDepth);
 	lexer_CheckRecursionDepth();
 }
 
@@ -97,15 +98,15 @@ void opt_Parse(char const *s) {
 		}
 		if (strlen(precisionArg) <= 2) {
 			int result;
-			unsigned int precision;
+			unsigned int fixPrecision;
 
-			result = sscanf(precisionArg, "%u", &precision);
+			result = sscanf(precisionArg, "%u", &fixPrecision);
 			if (result != 1) {
 				error("Invalid argument for option 'Q'");
-			} else if (precision < 1 || precision > 31) {
+			} else if (fixPrecision < 1 || fixPrecision > 31) {
 				error("Argument for option 'Q' must be between 1 and 31");
 			} else {
-				opt_Q(precision);
+				opt_Q(fixPrecision);
 			}
 		} else {
 			error("Invalid argument for option 'Q'");
@@ -124,14 +125,14 @@ void opt_Parse(char const *s) {
 		}
 
 		char *endptr;
-		unsigned long newDepth = strtoul(s, &endptr, 10);
+		unsigned long maxRecursionDepth = strtoul(s, &endptr, 10);
 
 		if (*endptr != '\0') {
 			error("Invalid argument to option 'r' (\"%s\")", s);
 		} else if (errno == ERANGE) {
 			error("Argument to 'r' is out of range (\"%s\")", s);
 		} else {
-			opt_R(newDepth);
+			opt_R(maxRecursionDepth);
 		}
 		break;
 	}
@@ -153,17 +154,12 @@ void opt_Parse(char const *s) {
 void opt_Push() {
 	OptStackEntry entry;
 
-	// Both of these are pulled from lexer.hpp
-	memcpy(entry.binDigits, binDigits, std::size(binDigits));
-	memcpy(entry.gfxDigits, gfxDigits, std::size(gfxDigits));
-
-	entry.fixPrecision = fixPrecision; // Pulled from fixpoint.hpp
-
-	entry.fillByte = fillByte; // Pulled from section.hpp
-
-	entry.warningStates = warnings.state; // Pulled from warning.hpp
-
-	entry.maxRecursionDepth = maxRecursionDepth; // Pulled from fstack.h
+	memcpy(entry.binDigits, options.binDigits, std::size(options.binDigits));
+	memcpy(entry.gfxDigits, options.gfxDigits, std::size(options.gfxDigits));
+	entry.padByte = options.padByte;
+	entry.fixPrecision = options.fixPrecision;
+	entry.maxRecursionDepth = options.maxRecursionDepth;
+	entry.warningStates = warnings.state;
 
 	stack.push(entry);
 }
@@ -179,7 +175,7 @@ void opt_Pop() {
 
 	opt_B(entry.binDigits);
 	opt_G(entry.gfxDigits);
-	opt_P(entry.fillByte);
+	opt_P(entry.padByte);
 	opt_Q(entry.fixPrecision);
 	opt_R(entry.maxRecursionDepth);
 
diff --git a/src/asm/output.cpp b/src/asm/output.cpp
index 3d4d9896..a84049d8 100644
--- a/src/asm/output.cpp
+++ b/src/asm/output.cpp
@@ -30,8 +30,6 @@ struct Assertion {
 	std::string message;
 };
 
-std::string objectFileName;
-
 // List of symbols to put in the object file
 static std::vector<Symbol *> objectSymbols;
 
@@ -316,21 +314,23 @@ static void writeFileStackNode(FileStackNode const &node, FILE *file) {
 }
 
 void out_WriteObject() {
-	if (objectFileName.empty()) {
+	if (options.objectFileName.empty()) {
 		return;
 	}
 
 	FILE *file;
-	if (objectFileName != "-") {
-		file = fopen(objectFileName.c_str(), "wb");
+	if (options.objectFileName != "-") {
+		file = fopen(options.objectFileName.c_str(), "wb");
 	} else {
-		objectFileName = "<stdout>";
+		options.objectFileName = "<stdout>";
 		(void)setmode(STDOUT_FILENO, O_BINARY);
 		file = stdout;
 	}
 	if (!file) {
 		// LCOV_EXCL_START
-		fatal("Failed to open object file '%s': %s", objectFileName.c_str(), strerror(errno));
+		fatal(
+		    "Failed to open object file '%s': %s", options.objectFileName.c_str(), strerror(errno)
+		);
 		// LCOV_EXCL_STOP
 	}
 	Defer closeFile{[&] { fclose(file); }};
@@ -370,11 +370,11 @@ void out_WriteObject() {
 }
 
 void out_SetFileName(std::string const &name) {
-	if (!objectFileName.empty()) {
-		warnx("Overriding output filename %s", objectFileName.c_str());
+	if (!options.objectFileName.empty()) {
+		warnx("Overriding output filename %s", options.objectFileName.c_str());
 	}
-	objectFileName = name;
-	verbosePrint("Output filename %s\n", objectFileName.c_str()); // LCOV_EXCL_LINE
+	options.objectFileName = name;
+	verbosePrint("Output filename %s\n", options.objectFileName.c_str()); // LCOV_EXCL_LINE
 }
 
 static void dumpString(std::string const &escape, FILE *file) {
diff --git a/src/asm/parser.y b/src/asm/parser.y
index 28c59e95..c38394da 100644
--- a/src/asm/parser.y
+++ b/src/asm/parser.y
@@ -1671,13 +1671,13 @@ iconst:
 
 precision_arg:
 	%empty {
-		$$ = fix_Precision();
+		$$ = options.fixPrecision;
 	}
 	| COMMA iconst {
 		$$ = $2;
 		if ($$ < 1 || $$ > 31) {
 			::error("Fixed-point precision must be between 1 and 31, not %" PRId32, $$);
-			$$ = fix_Precision();
+			$$ = options.fixPrecision;
 		}
 	}
 ;
diff --git a/src/asm/section.cpp b/src/asm/section.cpp
index f5eb8aae..cb0a18fb 100644
--- a/src/asm/section.cpp
+++ b/src/asm/section.cpp
@@ -24,8 +24,6 @@
 
 using namespace std::literals;
 
-uint8_t fillByte;
-
 struct UnionStackEntry {
 	uint32_t start;
 	uint32_t size;
@@ -782,7 +780,7 @@ void sect_Skip(uint32_t skip, bool ds) {
 		}
 		// We know we're in a code SECTION
 		while (skip--) {
-			writeByte(fillByte);
+			writeByte(options.padByte);
 		}
 	}
 }
diff --git a/src/asm/warning.cpp b/src/asm/warning.cpp
index 0b933f86..afdb3e48 100644
--- a/src/asm/warning.cpp
+++ b/src/asm/warning.cpp
@@ -18,7 +18,6 @@
 #include "asm/main.hpp"
 
 unsigned int nbErrors = 0;
-unsigned int maxErrors = 0;
 
 // clang-format off: nested initializers
 Diagnostics<WarningLevel, WarningID> warnings = {
@@ -81,7 +80,7 @@ static void printDiag(
 
 static void incrementErrors() {
 	// This intentionally makes 0 act as "unlimited" (or at least "limited to sizeof(unsigned)")
-	if (++nbErrors == maxErrors) {
+	if (++nbErrors == options.maxErrors) {
 		fprintf(
 		    stderr,
 		    "Assembly aborted after the maximum of %u error%s! (configure with "