From c883fa7909583c20d31c0673a2752298886fd754 Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Sun, 17 Sep 2023 12:54:54 +0200
Subject: [PATCH] Update build options --nostdlib --nolibc --emit-stdlib
 --forcelinker --strip-unused.

---
 src/build/build_internal.h           |   3 +-
 src/build/build_options.c            | 133 +++++++++++----------------
 src/build/build_options.h            | 111 ++++++++++++++++++----
 src/build/builder.c                  |  73 +++++----------
 src/build/project.c                  |  49 ++++------
 src/compiler/compiler.c              |   9 +-
 src/compiler/compiler_internal.h     |  20 ++++
 src/compiler/linker.c                |  18 ++--
 src/compiler/llvm_codegen.c          |   6 +-
 src/compiler/llvm_codegen_expr.c     |  26 +++---
 src/compiler/llvm_codegen_function.c |   2 +-
 src/compiler/llvm_codegen_module.c   |   2 +-
 src/compiler/llvm_codegen_stmt.c     |   2 +-
 src/compiler/sema_liveness.c         |   2 +-
 src/compiler/semantic_analyser.c     |   6 +-
 15 files changed, 241 insertions(+), 221 deletions(-)

diff --git a/src/build/build_internal.h b/src/build/build_internal.h
index 68a42fe3a..d3b9c7a85 100644
--- a/src/build/build_internal.h
+++ b/src/build/build_internal.h
@@ -7,8 +7,7 @@
 #include "utils/lib.h"
 #include "utils/json.h"
 #include "build_options.h"
-#define DEFAULT_SYMTAB_SIZE (256 * 1024)
-#define DEFAULT_SWITCHRANGE_MAX_SIZE (256)
+
 
 typedef struct
 {
diff --git a/src/build/build_options.c b/src/build/build_options.c
index 8d3d07312..dc734ac36 100644
--- a/src/build/build_options.c
+++ b/src/build/build_options.c
@@ -83,8 +83,6 @@ static void usage(void)
 	OUTPUT("Options:");
 	OUTPUT("  --tb                      - Use Tilde Backend for compilation.");
 	OUTPUT("  --stdlib <dir>            - Use this directory as the C3 standard library path.");
-	OUTPUT("  --nostdlib                - Do not include the standard library.");
-	OUTPUT("  --nolibc                  - Do not implicitly link libc nor any associated files.");
 	OUTPUT("  --no-entry                - Do not generate (or require) a main function.");
 	OUTPUT("  --libdir <dir>            - Add this directory to the C3 library search paths.");
 	OUTPUT("  --lib <name>              - Add this library to the compilation.");
@@ -101,17 +99,11 @@ static void usage(void)
 	OUTPUT("  -O0                       - Safe, no optimizations, emit debug info.");
 	OUTPUT("  -O1                       - Safe, high optimization, emit debug info.");
 	OUTPUT("  -O2                       - Unsafe, high optimization, emit debug info.");
-	OUTPUT("  -O3                       - Unsafe, highest optimization, relaxed maths, emit debug info.");
-	OUTPUT("  -O4                       - Unsafe, highest optimization, fast maths, emit debug info.");
-	OUTPUT("  -Os                       - Unsafe, high optimization, small code, no debug info.");
-	OUTPUT("  -Oz                       - Unsafe, high optimization, tiny code, no debug info.");
-	OUTPUT("  -O0+                      - O0, single module.");
-	OUTPUT("  -O1+                      - O1, single module.");
-	OUTPUT("  -O2+                      - O2, single module.");
-	OUTPUT("  -O3+                      - O3, single module.");
-	OUTPUT("  -O4+                      - O4, single module.");
-	OUTPUT("  -Os+                      - Os, single module.");
-	OUTPUT("  -Oz+                      - Oz, single module.");
+	OUTPUT("  -O3                       - Unsafe, high optimization, single module, emit debug info.");
+	OUTPUT("  -O4                       - Unsafe, highest optimization, relaxed maths, single module, emit debug info.");
+	OUTPUT("  -O5                       - Unsafe, highest optimization, fast maths, single module, emit debug info.");
+	OUTPUT("  -Os                       - Unsafe, high optimization, small code, single module, no debug info.");
+	OUTPUT("  -Oz                       - Unsafe, high optimization, tiny code, single module, no debug info.");
 	OUTPUT("  -t1                       - Trust level 1 - don't allow $include nor $exec (default).");
 	OUTPUT("  -t2                       - Trust level 2 - allow $include but not $exec / exec directives.");
 	OUTPUT("  -t3                       - Trust level 3 - full trust, allow both include and exec.");
@@ -125,13 +117,12 @@ static void usage(void)
 	OUTPUT("  --emit-asm                - Emit asm as a .s file per module.");
 	OUTPUT("  --obj                     - Emit object files. (Enabled by default)");
 	OUTPUT("  --no-obj                  - Do not output object files, this is only valid for `compile-only`.");
-	OUTPUT("  --emit-stdlib             - Output files for the standard library. (Enabled by default)");
-	OUTPUT("  --no-emit-stdlib          - Do not output object files (nor asm or ir) for the standard library.");
 	OUTPUT("  --target <target>         - Compile for a particular architecture + OS target.");
 	OUTPUT("  --threads <number>        - Set the number of threads to use for compilation.");
 	OUTPUT("  --safe=<yes|no>           - Turn safety (contracts, runtime bounds checking, null pointer checks etc) on or off.");
 	OUTPUT("  --optlevel=<option>       - Code optimization level: none, less, more, max.");
 	OUTPUT("  --optsize=<option>        - Code size optimization: none, small, tiny.");
+	OUTPUT("  --single-module=<yes|no>  - Compile all modules together, enables more inlining.");
 	OUTPUT("");
 	OUTPUT("  -g                        - Emit debug info.");
 	OUTPUT("  -g0                       - Emit no debug info.");
@@ -140,15 +131,19 @@ static void usage(void)
 	OUTPUT("  -l <library>              - Link with the library provided.");
 	OUTPUT("  -L <library dir>          - Append the directory to the linker search paths.");
 	OUTPUT("  -z <argument>             - Send the <argument> as a parameter to the linker.");
-	OUTPUT("  --forcelinker             - Force built in linker usage when doing non-cross linking.");
+	OUTPUT("  --builtinlinker=<yes|no>  - Use the built-in linker (default: yes for cross compilation, no otherwise).");
+	OUTPUT("");
+	OUTPUT("  --use-stdlib=<yes|no>     - Include the standard library (default: yes).");
+	OUTPUT("  --link-libc=<yes|no>      - Link libc other default libraries (default: yes).");
+	OUTPUT("  --emit-stdlib=<yes|no>    - Output files for the standard library. (default: yes)");
+	OUTPUT("  --panicfn <name>          - Override the panic function name.");
 	OUTPUT("");
 	OUTPUT("  --reloc=<option>          - Relocation model: none, pic, PIC, pie, PIE.");
 	OUTPUT("  --x86cpu=<option>         - Set general level of x64 cpu: baseline, ssse3, sse4, avx1, avx2-v1, avx2-v2 (Skylake/Zen1+), avx512 (Icelake/Zen4+), native.");
 	OUTPUT("  --x86vec=<option>         - Set max type of vector use: none, mmx, sse, avx, avx512, native.");
 	OUTPUT("  --riscvfloat=<option>     - Set type of RISC-V float support: none, float, double");
 	OUTPUT("  --memory-env=<option>     - Set the memory environment: normal, small, tiny, none.");
-	OUTPUT("  --strip-unused            - Strip unused code and globals from the output. (Enabled by default)");
-	OUTPUT("  --no-strip-unused         - Do not strip unused code and globals from the output.");
+	OUTPUT("  --strip-unused=<yes|no>   - Strip unused code and globals from the output. (default: yes)");
 	OUTPUT("  --fp-math=<option>        - FP math behaviour: strict, relaxed, fast.");
 	OUTPUT("");
 	OUTPUT("  --debug-stats             - Print debug statistics.");
@@ -533,65 +528,41 @@ static void parse_option(BuildOptions *options)
 			}
 			break;
 		case 'O':
-			if (match_shortopt("O0+"))
-			{
-				options->optsetting = OPT_SETTING_O0_PLUS;
-			}
-			else if (match_shortopt("O0"))
+			if (match_shortopt("O0"))
 			{
 				options->optsetting = OPT_SETTING_O0;
 			}
-			else if (match_shortopt("O1+"))
-			{
-				options->optsetting = OPT_SETTING_O1_PLUS;
-			}
 			else if (match_shortopt("O1"))
 			{
 				options->optsetting = OPT_SETTING_O1;
 			}
-			else if (match_shortopt("O2+"))
-			{
-				options->optsetting = OPT_SETTING_O2_PLUS;
-			}
 			else if (match_shortopt("O2"))
 			{
 				options->optsetting = OPT_SETTING_O2;
 			}
-			else if (match_shortopt("O3+"))
-			{
-				options->optsetting = OPT_SETTING_O3_PLUS;
-			}
 			else if (match_shortopt("O3"))
 			{
 				options->optsetting = OPT_SETTING_O3;
 			}
-			else if (match_shortopt("O4+"))
-			{
-				options->optsetting = OPT_SETTING_O4_PLUS;
-			}
 			else if (match_shortopt("O4"))
 			{
 				options->optsetting = OPT_SETTING_O4;
 			}
-			else if (match_shortopt("Os+"))
+			else if (match_shortopt("O5"))
 			{
-				options->optsetting = OPT_SETTING_OSMALL_PLUS;
+				options->optsetting = OPT_SETTING_O5;
 			}
 			else if (match_shortopt("Os"))
 			{
 				options->optsetting = OPT_SETTING_OSMALL;
 			}
-			else if (match_shortopt("Oz+"))
-			{
-				options->optsetting = OPT_SETTING_OTINY_PLUS;
-			}
 			else if (match_shortopt("Oz"))
 			{
 				options->optsetting = OPT_SETTING_OTINY;
 			}
 			else
 			{
-				FAIL_WITH_ERR("Invalid optimization level.");
+				FAIL_WITH_ERR("Invalid optimization level, expected O0 - O5, Os or Oz.");
 			}
 			return;
 		case 'E':
@@ -658,21 +629,11 @@ static void parse_option(BuildOptions *options)
 				options->symtab_size = next_highest_power_of_2(symtab);
 				return;
 			}
-			if (match_longopt("forcelinker"))
-			{
-				options->force_linker = true;
-				return;
-			}
 			if (match_longopt("version"))
 			{
 				print_version();
 				exit_compiler(COMPILER_SUCCESS_EXIT);
 			}
-			if (match_longopt("no-strip-unused"))
-			{
-				options->no_strip_unused = true;
-				return;
-			}
 			if ((argopt = match_argopt("fp-math")))
 			{
 				options->fp_math = (FpOpt)parse_multi_option(argopt, 3, fp_math);
@@ -690,12 +651,37 @@ static void parse_option(BuildOptions *options)
 			}
 			if ((argopt = match_argopt("safe")))
 			{
-				options->safety_level = (SafetyLevel)parse_multi_option(argopt, 2, safety_levels);
+				options->safety_level = (SafetyLevel)parse_multi_option(argopt, 2, on_off);
+				return;
+			}
+			if ((argopt = match_argopt("single-module")))
+			{
+				options->single_module = (SingleModule)parse_multi_option(argopt, 2, on_off);
+				return;
+			}
+			if ((argopt = match_argopt("builtinlinker")))
+			{
+				options->builtin_linker = (BuiltinLinker)parse_multi_option(argopt, 2, on_off);
+				return;
+			}
+			if ((argopt = match_argopt("link-libc")))
+			{
+				options->link_libc = (LinkLibc)parse_multi_option(argopt, 2, on_off);
+				return;
+			}
+			if ((argopt = match_argopt("strip-unused")))
+			{
+				options->strip_unused = (StripUnused)parse_multi_option(argopt, 2, on_off);
+				return;
+			}
+			if ((argopt = match_argopt("emit-stdlib")))
+			{
+				options->emit_stdlib = (EmitStdlib)parse_multi_option(argopt, 2, on_off);
 				return;
 			}
-			if (match_longopt("strip-unused"))
+			if ((argopt = match_argopt("use-stdlib")))
 			{
-				options->no_strip_unused = false;
+				options->use_stdlib = (UseStdlib)parse_multi_option(argopt, 2, on_off);
 				return;
 			}
 			if ((argopt = match_argopt("x86vec")))
@@ -739,16 +725,6 @@ static void parse_option(BuildOptions *options)
 				options->no_obj = false;
 				return;
 			}
-			if (match_longopt("no-emit-stdlib"))
-			{
-				options->no_emit_stdlib = true;
-				return;
-			}
-			if (match_longopt("emit-stdlib"))
-			{
-				options->no_emit_stdlib = false;
-				return;
-			}
 			if (match_longopt("debug-log"))
 			{
 				debug_log = true;
@@ -866,17 +842,7 @@ static void parse_option(BuildOptions *options)
 			{
 				if (at_end() || next_is_opt()) error_exit("error: --stdlib needs a directory.");
 				options->std_lib_dir = check_dir(next_arg());
-				options->no_stdlib = false;
-				return;
-			}
-			if (match_longopt("nostdlib"))
-			{
-				options->no_stdlib = true;
-				return;
-			}
-			if (match_longopt("nolibc"))
-			{
-				options->no_libc = true;
+				options->emit_stdlib = EMIT_STDLIB_ON;
 				return;
 			}
 			if (match_longopt("panicfn"))
@@ -966,6 +932,7 @@ static void parse_option(BuildOptions *options)
 			if (match_longopt("test"))
 			{
 				options->test_mode = true;
+				options->strip_unused = STRIP_UNUSED_OFF;
 				return;
 			}
 			if (match_longopt("template"))
@@ -1045,6 +1012,12 @@ BuildOptions parse_arguments(int argc, const char *argv[])
 		.riscv_float_capability = RISCVFLOAT_DEFAULT,
 		.memory_environment = MEMORY_ENV_NOT_SET,
 		.win.crt_linking = WIN_CRT_DEFAULT,
+		.emit_stdlib = EMIT_STDLIB_NOT_SET,
+		.link_libc = LINK_LIBC_NOT_SET,
+		.use_stdlib = USE_STDLIB_NOT_SET,
+		.builtin_linker = BUILTIN_LINKER_NOT_SET,
+		.strip_unused = STRIP_UNUSED_NOT_SET,
+		.single_module = SINGLE_MODULE_NOT_SET,
 		.files = NULL,
 		.build_dir = NULL,
 
diff --git a/src/build/build_options.h b/src/build/build_options.h
index 5eae6d71d..5125defcf 100644
--- a/src/build/build_options.h
+++ b/src/build/build_options.h
@@ -11,6 +11,8 @@
 #define MAX_FILES 2048
 #define MAX_INCLUDES 2048
 #define MAX_THREADS 0xFFFF
+#define DEFAULT_SYMTAB_SIZE (256 * 1024)
+#define DEFAULT_SWITCHRANGE_MAX_SIZE (256)
 
 void update_feature_flags(const char ***flags, const char ***removed_flag, const char *arg, bool add);
 
@@ -103,19 +105,13 @@ typedef enum
 {
 	OPT_SETTING_NOT_SET = -1,
 	OPT_SETTING_O0 = 0,
-	OPT_SETTING_O0_PLUS,
 	OPT_SETTING_O1,
-	OPT_SETTING_O1_PLUS,
 	OPT_SETTING_O2,
-	OPT_SETTING_O2_PLUS,
 	OPT_SETTING_O3,
-	OPT_SETTING_O3_PLUS,
 	OPT_SETTING_O4,
-	OPT_SETTING_O4_PLUS,
+	OPT_SETTING_O5,
 	OPT_SETTING_OSMALL,
-	OPT_SETTING_OSMALL_PLUS,
 	OPT_SETTING_OTINY,
-	OPT_SETTING_OTINY_PLUS
 } OptimizationSetting;
 
 typedef enum
@@ -127,6 +123,48 @@ typedef enum
 	OPTIMIZATION_AGGRESSIVE = 3,    // -O3
 } OptimizationLevel;
 
+typedef enum
+{
+	SINGLE_MODULE_NOT_SET = -1,
+	SINGLE_MODULE_OFF = 0,
+	SINGLE_MODULE_ON = 1
+} SingleModule;
+
+typedef enum
+{
+	BUILTIN_LINKER_NOT_SET = -1,
+	BUILTIN_LINKER_OFF = 0,
+	BUILTIN_LINKER_ON = 1
+} BuiltinLinker;
+
+typedef enum
+{
+	STRIP_UNUSED_NOT_SET = -1,
+	STRIP_UNUSED_OFF = 0,
+	STRIP_UNUSED_ON = 1
+} StripUnused;
+
+typedef enum
+{
+	LINK_LIBC_NOT_SET = -1,
+	LINK_LIBC_OFF = 0,
+	LINK_LIBC_ON = 1
+} LinkLibc;
+
+typedef enum
+{
+	EMIT_STDLIB_NOT_SET = -1,
+	EMIT_STDLIB_OFF = 0,
+	EMIT_STDLIB_ON = 1
+} EmitStdlib;
+
+typedef enum
+{
+	USE_STDLIB_NOT_SET = -1,
+	USE_STDLIB_OFF = 0,
+	USE_STDLIB_ON = 1
+} UseStdlib;
+
 typedef enum
 {
 	SIZE_OPTIMIZATION_NOT_SET = -1,
@@ -229,7 +267,7 @@ static const char *optsizes[3] = {
 		[SIZE_OPTIMIZATION_TINY] = "more",
 };
 
-static const char *safety_levels[2] = {
+static const char *on_off[2] = {
 		[SAFETY_OFF] = "no",
 		[SAFETY_ON] = "yes",
 };
@@ -373,16 +411,13 @@ typedef struct BuildOptions_
 	DebugInfo debug_info_override;
 	ArchOsTarget arch_os_target_override;
 	SafetyLevel safety_level;
+	SingleModule single_module;
 	bool emit_llvm;
 	bool emit_asm;
 	bool benchmark_mode;
 	bool test_mode;
-	bool no_stdlib;
 	bool no_entry;
-	bool no_libc;
 	bool no_obj;
-	bool no_emit_stdlib;
-	bool force_linker;
 	bool read_stdin;
 	bool print_output;
 	const char *panicfn;
@@ -395,11 +430,15 @@ typedef struct BuildOptions_
 	X86VectorCapability x86_vector_capability;
 	X86CpuSet x86_cpu_set;
 	FpOpt fp_math;
+	EmitStdlib emit_stdlib;
+	UseStdlib use_stdlib;
+	LinkLibc link_libc;
+	BuiltinLinker builtin_linker;
+	StripUnused strip_unused;
 	OptimizationLevel optlevel;
 	SizeOptimizationLevel optsize;
 	RiscvFloatCapability riscv_float_capability;
 	MemoryEnvironment memory_environment;
-	bool no_strip_unused;
 	bool print_keywords;
 	bool print_attributes;
 	bool print_builtins;
@@ -476,28 +515,28 @@ typedef struct
 	bool check_only;
 	bool emit_llvm;
 	bool emit_asm;
-	bool no_stdlib;
-	bool no_libc;
-	bool no_strip_unused;
 	bool emit_object_files;
-	bool force_linker;
 	bool benchmarking;
 	bool testing;
 	bool read_stdin;
 	bool print_output;
 	bool no_entry;
-	bool no_emit_stdlib;
 	int build_threads;
 	TrustLevel trust_level;
 	OptimizationSetting optsetting;
 	OptimizationLevel optlevel;
 	MemoryEnvironment memory_environment;
 	SizeOptimizationLevel optsize;
-	bool single_module;
+	SingleModule single_module;
+	UseStdlib use_stdlib;
+	EmitStdlib emit_stdlib;
+	LinkLibc link_libc;
+	StripUnused strip_unused;
 	DebugInfo debug_info;
 	RelocModel reloc_model;
 	ArchOsTarget arch_os_target;
 	CompilerBackend backend;
+	BuiltinLinker builtin_linker;
 	uint32_t symtab_size;
 	uint32_t switchrange_max_size;
 	const char *panicfn;
@@ -540,4 +579,36 @@ typedef struct
 BuildOptions parse_arguments(int argc, const char *argv[]);
 ArchOsTarget arch_os_target_from_string(const char *target);
 bool command_is_projectless(CompilerCommand command);
-void update_build_target_with_opt_level(BuildTarget *target, OptimizationSetting level);
\ No newline at end of file
+void update_build_target_with_opt_level(BuildTarget *target, OptimizationSetting level);
+
+static BuildTarget default_build_target = {
+		.optlevel = OPTIMIZATION_NOT_SET,
+		.optsetting = OPT_SETTING_NOT_SET,
+		.memory_environment = MEMORY_ENV_NORMAL,
+		.optsize = SIZE_OPTIMIZATION_NOT_SET,
+		.arch_os_target = ARCH_OS_TARGET_DEFAULT,
+		.debug_info = DEBUG_INFO_NOT_SET,
+		.use_stdlib = USE_STDLIB_NOT_SET,
+		.link_libc = LINK_LIBC_NOT_SET,
+		.emit_stdlib = EMIT_STDLIB_NOT_SET,
+		.builtin_linker = BUILTIN_LINKER_NOT_SET,
+		.single_module = SINGLE_MODULE_NOT_SET,
+		.strip_unused = STRIP_UNUSED_NOT_SET,
+		.symtab_size = DEFAULT_SYMTAB_SIZE,
+		.reloc_model = RELOC_DEFAULT,
+		.cc = "cc",
+		.version = "1.0.0",
+		.langrev = "1",
+		.cpu = "generic",
+		.type = TARGET_TYPE_EXECUTABLE,
+		.feature.x86_struct_return = STRUCT_RETURN_DEFAULT,
+		.feature.soft_float = SOFT_FLOAT_DEFAULT,
+		.feature.fp_math = FP_DEFAULT,
+		.feature.trap_on_wrap = false,
+		.feature.riscv_float_capability = RISCVFLOAT_DEFAULT,
+		.feature.x86_vector_capability = X86VECTOR_DEFAULT,
+		.feature.x86_cpu_set = X86CPU_DEFAULT,
+		.feature.safe_mode = SAFETY_NOT_SET,
+		.win.crt_linking = WIN_CRT_DEFAULT,
+		.switchrange_max_size = DEFAULT_SWITCHRANGE_MAX_SIZE,
+};
\ No newline at end of file
diff --git a/src/build/builder.c b/src/build/builder.c
index 9cae8b608..3e2c6f541 100644
--- a/src/build/builder.c
+++ b/src/build/builder.c
@@ -103,55 +103,43 @@ void update_build_target_with_opt_level(BuildTarget *target, OptimizationSetting
 	FpOpt fp_opt = FP_STRICT;
 	switch (level)
 	{
-		case OPT_SETTING_O0_PLUS:
-			single_module = true;
-			break;
 		case OPT_SETTING_O0:
 			break;
-		case OPT_SETTING_O1_PLUS:
-			single_module = true;
-			FALLTHROUGH;
 		case OPT_SETTING_O1:
 			optlevel = OPTIMIZATION_MORE;
 			break;
-		case OPT_SETTING_O2_PLUS:
-			single_module = true;
-			FALLTHROUGH;
 		case OPT_SETTING_O2:
 			optlevel = OPTIMIZATION_MORE;
 			safety_level = false;
 			break;
-		case OPT_SETTING_O3_PLUS:
-			single_module = true;
-			FALLTHROUGH;
 		case OPT_SETTING_O3:
+			optlevel = OPTIMIZATION_MORE;
+			safety_level = false;
+			single_module = true;
+			break;
+		case OPT_SETTING_O4:
 			optlevel = OPTIMIZATION_AGGRESSIVE;
 			safety_level = SAFETY_OFF;
 			fp_opt = FP_RELAXED;
+			single_module = true;
 			break;
-		case OPT_SETTING_O4_PLUS:
+		case OPT_SETTING_O5:
 			single_module = true;
-			FALLTHROUGH;
-		case OPT_SETTING_O4:
 			optlevel = OPTIMIZATION_AGGRESSIVE;
 			safety_level = SAFETY_OFF;
 			fp_opt = FP_FAST;
-			break;
-		case OPT_SETTING_OSMALL_PLUS:
 			single_module = true;
-			FALLTHROUGH;
+			break;
 		case OPT_SETTING_OSMALL:
 			optlevel = OPTIMIZATION_MORE;
 			optsize = SIZE_OPTIMIZATION_SMALL;
 			safety_level = SAFETY_OFF;
 			break;
-		case OPT_SETTING_OTINY_PLUS:
-			target->single_module = true;
-			FALLTHROUGH;
 		case OPT_SETTING_OTINY:
 			optlevel = OPTIMIZATION_MORE;
 			optsize = SIZE_OPTIMIZATION_TINY;
 			safety_level = SAFETY_OFF;
+			single_module = true;
 			debug = DEBUG_INFO_NONE;
 			break;
 		case OPT_SETTING_NOT_SET:
@@ -163,7 +151,7 @@ void update_build_target_with_opt_level(BuildTarget *target, OptimizationSetting
 	if (target->feature.safe_mode == SAFETY_NOT_SET) target->feature.safe_mode = safety_level;
 	if (target->debug_info == DEBUG_INFO_NOT_SET) target->debug_info = debug;
 	if (target->feature.fp_math == FP_DEFAULT) target->feature.fp_math = fp_opt;
-	if (single_module) target->single_module = true;
+	if (target->single_module == SINGLE_MODULE_NOT_SET && single_module) target->single_module = SINGLE_MODULE_ON;
 }
 static void update_build_target_from_options(BuildTarget *target, BuildOptions *options)
 {
@@ -235,6 +223,9 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 	FOREACH_END();
 
 
+	target->read_stdin = options->read_stdin;
+
+
 	if (options->cc) target->cc = options->cc;
 	if (options->optlevel != OPTIMIZATION_NOT_SET)
 	{
@@ -248,7 +239,7 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 	{
 		target->feature.safe_mode = options->safety_level;
 	}
-	if (options->no_strip_unused || options->test_mode) target->no_strip_unused = true;
+	if (options->strip_unused != STRIP_UNUSED_NOT_SET) target->strip_unused = options->strip_unused;
 
 	if (options->memory_environment != MEMORY_ENV_NOT_SET)
 	{
@@ -264,6 +255,8 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 	}
 	if (options->reloc_model != RELOC_DEFAULT) target->reloc_model = options->reloc_model;
 
+	if (options->symtab_size) target->symtab_size = options->symtab_size;
+
 	for (int i = 0; i < options->linker_arg_count; i++)
 	{
 		vec_add(target->link_args, options->linker_args[i]);
@@ -277,14 +270,15 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 		vec_add(target->linker_libs, options->linker_libs[i]);
 	}
 	target->trust_level = options->trust_level;
-	if (options->no_stdlib) target->no_stdlib = true;
-	if (options->no_libc) target->no_libc = true;
+	if (options->use_stdlib != USE_STDLIB_NOT_SET) target->use_stdlib = options->use_stdlib;
+	if (options->link_libc != LINK_LIBC_NOT_SET) target->link_libc = options->link_libc;
+	if (options->builtin_linker != BUILTIN_LINKER_NOT_SET) target->builtin_linker = options->builtin_linker;
+	if (options->emit_stdlib != EMIT_STDLIB_NOT_SET) target->emit_stdlib = options->emit_stdlib;
 	if (options->no_entry) target->no_entry = true;
 	target->print_output = options->print_output;
 	target->emit_llvm = options->emit_llvm;
 	target->build_threads = options->build_threads;
 	target->emit_asm = options->emit_asm;
-	target->force_linker = options->force_linker;
 	target->panicfn = options->panicfn;
 	target->benchmarking = options->benchmarking;
 	target->testing = options->testing;
@@ -367,7 +361,6 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 	{
 		target->emit_object_files = false;
 	}
-	target->no_emit_stdlib = options->no_emit_stdlib;
 	for (int i = 0; i < options->lib_dir_count; i++)
 	{
 		vec_add(target->libdirs, options->lib_dir[i]);
@@ -381,33 +374,13 @@ static void update_build_target_from_options(BuildTarget *target, BuildOptions *
 		target->optsetting = options->optsetting;
 	}
 	update_build_target_with_opt_level(target, target->optsetting);
-
-
 }
 
 void init_default_build_target(BuildTarget *target, BuildOptions *options)
 {
-	*target = (BuildTarget) {
-		.read_stdin = options->read_stdin,
-		.type = TARGET_TYPE_EXECUTABLE,
-		.source_dirs = options->files,
-		.name = options->output_name,
-		.optsetting = OPT_SETTING_NOT_SET,
-		.optlevel = OPTIMIZATION_NOT_SET,
-		.memory_environment = MEMORY_ENV_NORMAL,
-		.optsize = SIZE_OPTIMIZATION_NOT_SET,
-		.symtab_size = options->symtab_size ? options->symtab_size : DEFAULT_SYMTAB_SIZE,
-		.switchrange_max_size = DEFAULT_SWITCHRANGE_MAX_SIZE,
-		.debug_info = DEBUG_INFO_NOT_SET,
-		.arch_os_target = ARCH_OS_TARGET_DEFAULT,
-		.reloc_model = RELOC_DEFAULT,
-		.feature.x86_vector_capability = X86VECTOR_DEFAULT,
-		.feature.x86_cpu_set = X86CPU_DEFAULT,
-		.feature.fp_math = FP_DEFAULT,
-		.feature.riscv_float_capability = RISCVFLOAT_DEFAULT,
-		.feature.safe_mode = SAFETY_NOT_SET,
-		.win.crt_linking = WIN_CRT_DEFAULT,
-	};
+	*target = default_build_target;
+	target->source_dirs = options->files;
+	target->name = options->output_name;
 	update_build_target_from_options(target, options);
 }
 
diff --git a/src/build/project.c b/src/build/project.c
index 584361aa7..912dd245b 100644
--- a/src/build/project.c
+++ b/src/build/project.c
@@ -298,21 +298,17 @@ static void load_into_build_target(JSONObject *json, const char *type, BuildTarg
 	DebugInfo info = get_valid_string_setting(json, "debug-info", type, debug_infos, 0, 3, "one of 'full' 'line-table' or 'none'.");
 	if (info > -1) target->debug_info = info;
 
-	static const char *opt_settings[14] = {
+	static const char *opt_settings[8] = {
 			[OPT_SETTING_O0] = "O0",
-			[OPT_SETTING_O0_PLUS] = "O0+",
 			[OPT_SETTING_O1] = "O1",
-			[OPT_SETTING_O1_PLUS] = "O1+",
 			[OPT_SETTING_O2] = "O2",
-			[OPT_SETTING_O2_PLUS] = "O2+",
 			[OPT_SETTING_O3] = "O3",
-			[OPT_SETTING_O3_PLUS] = "O3+",
+			[OPT_SETTING_O4] = "O4",
+			[OPT_SETTING_O5] = "O5",
 			[OPT_SETTING_OSMALL] = "Os",
-			[OPT_SETTING_OSMALL_PLUS] = "Os+",
-			[OPT_SETTING_OTINY] = "Oz",
-			[OPT_SETTING_OTINY_PLUS] = "Oz+"
+			[OPT_SETTING_OTINY] = "Oz"
 	};
-	OptimizationSetting opt = (OptimizationSetting)get_valid_string_setting(json, "opt", type, opt_settings, 0, 14, "'O0', 'O1' etc.");
+	OptimizationSetting opt = (OptimizationSetting)get_valid_string_setting(json, "opt", type, opt_settings, 0, 8, "'O0', 'O1' etc.");
 	update_build_target_with_opt_level(target, opt);
 
 	MemoryEnvironment env = get_valid_string_setting(json, "memory-env", type, memory_environment, 0, 4, "one of 'normal', 'small', 'tiny' or 'none'.");
@@ -413,14 +409,20 @@ static void load_into_build_target(JSONObject *json, const char *type, BuildTarg
 	const char *panicfn = get_valid_string(json, "panicfn", type, false);
 	target->panicfn = panicfn;
 
-	// nolibc
-	target->no_libc = get_valid_bool(json, "nolibc", type, target->no_libc);
+	// link-libc
+	target->link_libc = (LinkLibc)get_valid_bool(json, "nolibc", type, target->link_libc);
 
 	// no-entry
 	target->no_entry = get_valid_bool(json, "no-entry", type, target->no_entry);
 
-	// nostdlib
-	target->no_stdlib = get_valid_bool(json, "nostdlib", type, target->no_stdlib);
+	// use-stdlib
+	target->use_stdlib = (UseStdlib)get_valid_bool(json, "use-stdlib", type, target->use_stdlib);
+
+	// emit-stdlib
+	target->emit_stdlib = (EmitStdlib)get_valid_bool(json, "emit-stdlib", type, target->emit_stdlib);
+
+	// single-module
+	target->single_module = (SingleModule)get_valid_bool(json, "single-module", type, target->single_module);
 
 	// Trap on wrap
 	target->feature.trap_on_wrap = get_valid_bool(json, "trap-on-wrap", type, target->feature.trap_on_wrap);
@@ -468,26 +470,7 @@ static void project_add_targets(Project *project, JSONObject *project_data)
 			[TARGET_TYPE_TEST] = "test suite",
 			[TARGET_TYPE_OBJECT_FILES] = "object files"};
 
-	BuildTarget default_target = {
-			.optlevel = OPTIMIZATION_NOT_SET,
-			.optsetting = OPT_SETTING_NOT_SET,
-			.memory_environment = MEMORY_ENV_NORMAL,
-			.optsize = SIZE_OPTIMIZATION_NOT_SET,
-			.arch_os_target = ARCH_OS_TARGET_DEFAULT,
-			.debug_info = DEBUG_INFO_NOT_SET,
-			.symtab_size = DEFAULT_SYMTAB_SIZE,
-			.cc = "cc",
-			.version = "1.0.0",
-			.langrev = "1",
-			.cpu = "generic",
-			.feature.x86_struct_return = STRUCT_RETURN_DEFAULT,
-			.feature.soft_float = SOFT_FLOAT_DEFAULT,
-			.feature.trap_on_wrap = false,
-			.feature.x86_vector_capability = X86VECTOR_DEFAULT,
-			.feature.x86_cpu_set = X86CPU_DEFAULT,
-			.feature.safe_mode = SAFETY_NOT_SET,
-			.win.crt_linking = WIN_CRT_DEFAULT,
-	};
+	BuildTarget default_target = default_build_target;
 	load_into_build_target(project_data, "default target", &default_target, true);
 	JSONObject *targets_json = json_obj_get(project_data, "targets");
 	if (!targets_json)
diff --git a/src/compiler/compiler.c b/src/compiler/compiler.c
index 0e0aeb201..f20ca2264 100644
--- a/src/compiler/compiler.c
+++ b/src/compiler/compiler.c
@@ -278,7 +278,7 @@ void compiler_parse(void)
 	global_context_clear_errors();
 
 	// Add the standard library
-	if (global_context.lib_dir && !active_target.no_stdlib)
+	if (global_context.lib_dir && !no_stdlib())
 	{
 		file_add_wildcard_files(&global_context.sources, global_context.lib_dir, true, c3_suffix_list, 3);
 	}
@@ -485,7 +485,8 @@ void compiler_compile(void)
 
 	if (output_exe)
 	{
-		if (!active_target.no_libc && platform_target.os != OS_TYPE_WIN32 && active_target.arch_os_target == default_target && !active_target.force_linker)
+		if (link_libc() && platform_target.os != OS_TYPE_WIN32
+			&& active_target.arch_os_target == default_target && active_target.builtin_linker != BUILTIN_LINKER_ON)
 		{
 			platform_linker(output_exe, obj_files, output_file_count);
 			compiler_link_time = bench_mark();
@@ -855,11 +856,11 @@ void compile()
 	setup_bool_define("PLATFORM_F16_SUPPORTED", platform_target.float16);
 	setup_int_define("ARCH_TYPE", (uint64_t)platform_target.arch, type_int);
 	setup_int_define("MEMORY_ENVIRONMENT", (uint64_t)active_target.memory_environment, type_int);
-	setup_bool_define("COMPILER_LIBC_AVAILABLE", !active_target.no_libc);
+	setup_bool_define("COMPILER_LIBC_AVAILABLE", link_libc());
 	setup_int_define("COMPILER_OPT_LEVEL", (uint64_t)active_target.optlevel, type_int);
 	setup_int_define("OS_TYPE", (uint64_t)platform_target.os, type_int);
 	setup_int_define("COMPILER_SIZE_OPT_LEVEL", (uint64_t)active_target.optsize, type_int);
-	setup_bool_define("COMPILER_SAFE_MODE", active_target.feature.safe_mode);
+	setup_bool_define("COMPILER_SAFE_MODE", safe_mode_enabled());
 	setup_bool_define("DEBUG_SYMBOLS", active_target.debug_info == DEBUG_INFO_FULL);
 	setup_int_define("LLVM_VERSION", llvm_version_major, type_int);
 	setup_bool_define("BENCHMARKING", active_target.benchmarking);
diff --git a/src/compiler/compiler_internal.h b/src/compiler/compiler_internal.h
index dcd3b7559..6ad17537a 100644
--- a/src/compiler/compiler_internal.h
+++ b/src/compiler/compiler_internal.h
@@ -1941,6 +1941,26 @@ INLINE Type *typeinfotype(TypeInfoId id_)
 	return id_ ? type_infoptr(id_)->type : NULL;
 }
 
+INLINE bool safe_mode_enabled(void)
+{
+	return active_target.feature.safe_mode != SAFETY_OFF;
+}
+
+INLINE bool link_libc(void)
+{
+	return active_target.link_libc != LINK_LIBC_OFF;
+}
+
+INLINE bool strip_unused(void)
+{
+	return active_target.strip_unused != STRIP_UNUSED_OFF;
+}
+
+INLINE bool no_stdlib(void)
+{
+	return active_target.use_stdlib == USE_STDLIB_OFF;
+}
+
 bool ast_is_not_empty(Ast *ast);
 bool ast_is_compile_time(Ast *ast);
 bool ast_supports_continue(Ast *stmt);
diff --git a/src/compiler/linker.c b/src/compiler/linker.c
index ae873161d..9b89264c7 100644
--- a/src/compiler/linker.c
+++ b/src/compiler/linker.c
@@ -96,7 +96,7 @@ static void linker_setup_windows(const char ***args_ref, LinkerType linker_type,
 		default:
 			UNREACHABLE
 	}
-	if (active_target.no_libc) return;
+	if (!link_libc()) return;
 	if (!active_target.win.sdk)
 	{
 		const char *path = windows_cross_compile_library();
@@ -287,14 +287,14 @@ static void linker_setup_macos(const char ***args_ref, LinkerType linker_type)
 	}
 	add_arg("-arch");
 	add_arg(arch_to_linker_arch(platform_target.arch));
-	if (!active_target.no_strip_unused && active_target.type == TARGET_TYPE_EXECUTABLE)
+	if (strip_unused() && active_target.type == TARGET_TYPE_EXECUTABLE)
 	{
 		add_arg("-no_exported_symbols");
 		add_arg("-dead_strip");
 	}
 
 	// Skip if no libc.
-	if (active_target.no_libc) return;
+	if (!link_libc()) return;
 
 	const char *sysroot = active_target.macos.sdk ? active_target.macos.sdk : macos_sysroot();
 	if (!sysroot)
@@ -395,11 +395,11 @@ static void linker_setup_linux(const char ***args_ref, LinkerType linker_type)
 	if (is_no_pie(platform_target.reloc_model)) add_arg("-no-pie");
 	if (is_pie(platform_target.reloc_model)) add_arg("-pie");
 	if (platform_target.arch == ARCH_TYPE_X86_64) add_arg("--eh-frame-hdr");
-	if (active_target.no_libc) return;
+	if (!link_libc()) return;
 	const char *crt_begin_dir = find_linux_crt_begin();
 	const char *crt_dir = find_linux_crt();
 
-	if (!active_target.no_strip_unused && active_target.type == TARGET_TYPE_EXECUTABLE)
+	if (strip_unused() && active_target.type == TARGET_TYPE_EXECUTABLE)
 	{
 		add_arg("--gc-sections");
 	}
@@ -442,14 +442,14 @@ static void linker_setup_freebsd(const char ***args_ref, LinkerType linker_type)
 	if (is_pie(platform_target.reloc_model)) add_arg("-pie");
 	if (platform_target.arch == ARCH_TYPE_X86_64) add_arg("--eh-frame-hdr");
 
-	if (active_target.no_libc) return;
+	if (!link_libc()) return;
 
 	const char *crt_dir = find_freebsd_crt();
 	if (!crt_dir)
 	{
 		error_exit("Failed to find the C runtime at link time.");
 	}
-	if (!active_target.no_strip_unused && active_target.type == TARGET_TYPE_EXECUTABLE)
+	if (strip_unused() && active_target.type == TARGET_TYPE_EXECUTABLE)
 	{
 		add_arg("--gc-sections");
 	}
@@ -572,7 +572,7 @@ static bool linker_setup(const char ***args_ref, const char **files_to_link, uns
 			linker_setup_linux(args_ref, linker_type);
 			break;
 		case OS_TYPE_UNKNOWN:
-			if (!active_target.no_libc)
+			if (link_libc())
 			{
 				error_exit("Linking is not supported for unknown OS.");
 			}
@@ -754,7 +754,7 @@ void platform_linker(const char *output_file, const char **files, unsigned file_
 	vec_add(parts, active_target.cc ? active_target.cc : "cc");
 	append_fpie_pic_options(platform_target.reloc_model, &parts);
 	linker_setup(&parts, files, file_count, output_file, LINKER_CC);
-	if (!active_target.no_libc)
+	if (link_libc())
 	{
 		vec_add(parts, "-lm");
 	}
diff --git a/src/compiler/llvm_codegen.c b/src/compiler/llvm_codegen.c
index 781557deb..1cbc8d38e 100644
--- a/src/compiler/llvm_codegen.c
+++ b/src/compiler/llvm_codegen.c
@@ -1334,7 +1334,7 @@ void **llvm_gen(Module** modules, unsigned module_count)
 	if (!module_count) return NULL;
 	GenContext **gen_contexts = NULL;
 	llvm_codegen_setup();
-	if (active_target.single_module)
+	if (active_target.single_module == SINGLE_MODULE_ON)
 	{
 		GenContext *first_context;
 		unsigned first_element;
@@ -1413,7 +1413,7 @@ static bool module_is_stdlib(Module *module)
 static GenContext *llvm_gen_module(Module *module, LLVMContextRef shared_context)
 {
 	if (!vec_size(module->units)) return NULL;
-	if (active_target.no_emit_stdlib && module_is_stdlib(module)) return NULL;
+	if (active_target.emit_stdlib == EMIT_STDLIB_OFF && module_is_stdlib(module)) return NULL;
 
 	assert(intrinsics_setup);
 
@@ -1422,7 +1422,7 @@ static GenContext *llvm_gen_module(Module *module, LLVMContextRef shared_context
 	gencontext_init(gen_context, module, shared_context);
 	gencontext_begin_module(gen_context);
 
-	bool only_used = !active_target.no_strip_unused;
+	bool only_used = strip_unused();
 
 	FOREACH_BEGIN(CompilationUnit *unit, module->units)
 
diff --git a/src/compiler/llvm_codegen_expr.c b/src/compiler/llvm_codegen_expr.c
index b2d088db9..604c87f75 100644
--- a/src/compiler/llvm_codegen_expr.c
+++ b/src/compiler/llvm_codegen_expr.c
@@ -667,13 +667,13 @@ static inline void gencontext_emit_subscript(GenContext *c, BEValue *value, Expr
 	bool needs_len = false;
 	if (parent_type_kind == TYPE_SUBARRAY)
 	{
-		needs_len = active_target.feature.safe_mode || expr->subscript_expr.range.start_from_end;
+		needs_len = safe_mode_enabled() || expr->subscript_expr.range.start_from_end;
 	}
 	else if (parent_type_kind == TYPE_ARRAY)
 	{
 		// From back should always be folded.
 		assert(!expr_is_const(expr) || !expr->subscript_expr.range.start_from_end);
-		needs_len = (active_target.feature.safe_mode && !expr_is_const(expr)) || expr->subscript_expr.range.start_from_end;
+		needs_len = (safe_mode_enabled() && !expr_is_const(expr)) || expr->subscript_expr.range.start_from_end;
 	}
 	if (needs_len)
 	{
@@ -694,7 +694,7 @@ static inline void gencontext_emit_subscript(GenContext *c, BEValue *value, Expr
 		assert(needs_len);
 		index.value = LLVMBuildNUWSub(c->builder, llvm_zext_trunc(c, len.value, llvm_get_type(c, index.type)), index.value, "");
 	}
-	if (needs_len && active_target.feature.safe_mode && !llvm_is_global_eval(c))
+	if (needs_len && safe_mode_enabled() && !llvm_is_global_eval(c))
 	{
 		llvm_emit_array_bounds_check(c, &index, len.value, index_expr->span);
 	}
@@ -1510,7 +1510,7 @@ void llvm_emit_cast(GenContext *c, CastKind cast_kind, Expr *expr, BEValue *valu
 			value->type = to_type;
 			return;
 		case CAST_INTENUM:
-			if (active_target.feature.safe_mode && c->builder != c->global_builder)
+			if (safe_mode_enabled() && c->builder != c->global_builder)
 			{
 				llvm_value_rvalue(c, value);
 				BEValue check;
@@ -2490,7 +2490,7 @@ static inline void llvm_emit_deref(GenContext *c, BEValue *value, Expr *inner, T
 	}
 	llvm_emit_expr(c, value, inner);
 	llvm_value_rvalue(c, value);
-	if (active_target.feature.safe_mode)
+	if (safe_mode_enabled())
 	{
 		LLVMValueRef check = LLVMBuildICmp(c->builder, LLVMIntEQ, value->value, llvm_get_zero(c, inner->type), "checknull");
 		scratch_buffer_clear();
@@ -2714,7 +2714,7 @@ void llvm_emit_len_for_expr(GenContext *c, BEValue *be_value, BEValue *expr_to_l
 static void llvm_emit_trap_negative(GenContext *c, Expr *expr, LLVMValueRef value, const char *error,
 									BEValue *index_val)
 {
-	if (!active_target.feature.safe_mode) return;
+	if (!safe_mode_enabled()) return;
 	if (type_is_integer_unsigned(expr->type->canonical)) return;
 
 	LLVMValueRef zero = llvm_const_int(c, expr->type, 0);
@@ -2724,7 +2724,7 @@ static void llvm_emit_trap_negative(GenContext *c, Expr *expr, LLVMValueRef valu
 
 static void llvm_emit_trap_zero(GenContext *c, Type *type, LLVMValueRef value, const char *error, SourceSpan loc)
 {
-	if (!active_target.feature.safe_mode) return;
+	if (!safe_mode_enabled()) return;
 
 	assert(type == type_flatten(type));
 
@@ -2753,7 +2753,7 @@ static void llvm_emit_trap_zero(GenContext *c, Type *type, LLVMValueRef value, c
 
 static void llvm_emit_trap_invalid_shift(GenContext *c, LLVMValueRef value, Type *type, const char *error, SourceSpan loc)
 {
-	if (!active_target.feature.safe_mode) return;
+	if (!safe_mode_enabled()) return;
 	BEValue val;
 	type = type_flatten(type);
 	llvm_value_set(&val, value, type);
@@ -2843,7 +2843,7 @@ static void llvm_emit_slice_values(GenContext *c, Expr *slice, BEValue *parent_r
 	bool check_end = true;
 	bool start_from_end = slice->subscript_expr.range.start_from_end;
 	bool end_from_end = slice->subscript_expr.range.end_from_end;
-	if (!end || start_from_end || end_from_end || active_target.feature.safe_mode)
+	if (!end || start_from_end || end_from_end || safe_mode_enabled())
 	{
 		switch (parent_type->type_kind)
 		{
@@ -2872,7 +2872,7 @@ static void llvm_emit_slice_values(GenContext *c, Expr *slice, BEValue *parent_r
 	}
 
 	// Check that index does not extend beyond the length.
-	if (check_end && active_target.feature.safe_mode)
+	if (check_end && safe_mode_enabled())
 	{
 		assert(len.value);
 		BEValue exceeds_size;
@@ -2908,7 +2908,7 @@ static void llvm_emit_slice_values(GenContext *c, Expr *slice, BEValue *parent_r
 		}
 
 		// This will trap any bad negative index, so we're fine.
-		if (active_target.feature.safe_mode && !is_len_range)
+		if (safe_mode_enabled() && !is_len_range)
 		{
 			BEValue excess;
 			llvm_emit_int_comp(c, &excess, &start_index, &end_index, BINARYOP_GT);
@@ -3004,7 +3004,7 @@ static void llvm_emit_slice_copy(GenContext *c, BEValue *be_value, Expr *expr)
 	llvm_emit_subarray_len(c, be_value, &from_len);
 	llvm_value_rvalue(c, &from_len);
 
-	if (active_target.feature.safe_mode)
+	if (safe_mode_enabled())
 	{
 		BEValue to_len;
 		llvm_emit_subarray_len(c, &assigned_to, &to_len);
@@ -6345,7 +6345,7 @@ static inline void llvm_emit_typeid_info(GenContext *c, BEValue *value, Expr *ex
 		llvm_value_set(value, parent_value, expr->type);
 		return;
 	}
-	bool safe_mode = active_target.feature.safe_mode;
+	bool safe_mode = safe_mode_enabled();
 	if (safe_mode || info_kind == TYPEID_INFO_KIND)
 	{
 		kind = llvm_emit_struct_gep_raw(c, ref, c->introspect_type, INTROSPECT_INDEX_KIND, align, &alignment);
diff --git a/src/compiler/llvm_codegen_function.c b/src/compiler/llvm_codegen_function.c
index 9fe1a907b..68086c86c 100644
--- a/src/compiler/llvm_codegen_function.c
+++ b/src/compiler/llvm_codegen_function.c
@@ -176,7 +176,7 @@ static inline void llvm_process_parameter_value(GenContext *c, Decl *decl, ABIAr
 	DIRECT_FROM_COERCE:
 		{
 			LLVMValueRef param_value = llvm_get_next_param(c, index);
-			if (decl->var.not_null && active_target.feature.safe_mode)
+			if (decl->var.not_null && safe_mode_enabled())
 			{
 				LLVMValueRef is_null = LLVMBuildIsNull(c->builder, param_value, "");
 				scratch_buffer_clear();
diff --git a/src/compiler/llvm_codegen_module.c b/src/compiler/llvm_codegen_module.c
index 40103b873..0a3fd49b5 100644
--- a/src/compiler/llvm_codegen_module.c
+++ b/src/compiler/llvm_codegen_module.c
@@ -157,7 +157,7 @@ void gencontext_begin_module(GenContext *c)
 
 		c->debug.runtime_version = 1;
 		c->debug.builder = LLVMCreateDIBuilder(c->module);
-		if (active_target.debug_info == DEBUG_INFO_FULL && active_target.feature.safe_mode)
+		if (active_target.debug_info == DEBUG_INFO_FULL && safe_mode_enabled())
 		{
 			c->debug.stack_type = LLVMStructCreateNamed(c->context, ".$callstack");
 			LLVMTypeRef types[5] = { c->ptr_type,
diff --git a/src/compiler/llvm_codegen_stmt.c b/src/compiler/llvm_codegen_stmt.c
index 22b258a1c..dbf79af00 100644
--- a/src/compiler/llvm_codegen_stmt.c
+++ b/src/compiler/llvm_codegen_stmt.c
@@ -1001,7 +1001,7 @@ static inline void llvm_emit_assert_stmt(GenContext *c, Ast *ast)
 	ExprId exprid = ast->assert_stmt.expr;
 	Expr *assert_expr = exprptr(exprid);
 
-	if (active_target.feature.safe_mode)
+	if (safe_mode_enabled())
 	{
 		BEValue value;
 		llvm_emit_expr(c, &value, assert_expr);
diff --git a/src/compiler/sema_liveness.c b/src/compiler/sema_liveness.c
index b33265439..6160a3dc4 100644
--- a/src/compiler/sema_liveness.c
+++ b/src/compiler/sema_liveness.c
@@ -150,7 +150,7 @@ static void sema_trace_stmt_liveness(Ast *ast)
 		case AST_ASSERT_STMT:
 		{
 			Expr *e = exprptr(ast->assert_stmt.expr);
-			if (active_target.feature.safe_mode || expr_is_pure(e))
+			if (safe_mode_enabled() || expr_is_pure(e))
 			{
 				sema_trace_expr_liveness(e);
 			}
diff --git a/src/compiler/semantic_analyser.c b/src/compiler/semantic_analyser.c
index 4f67f2b15..3ef8096f6 100644
--- a/src/compiler/semantic_analyser.c
+++ b/src/compiler/semantic_analyser.c
@@ -241,7 +241,7 @@ static void sema_analyze_to_stage(AnalysisStage stage)
 
 static void assign_panicfn(void)
 {
-	if (!active_target.panicfn && active_target.no_stdlib)
+	if (!active_target.panicfn && no_stdlib())
 	{
 		global_context.panic_var = NULL;
 		global_context.panicf = NULL;
@@ -272,7 +272,7 @@ static void assign_panicfn(void)
 	global_context.panic_var = decl;
 	decl->no_strip = true;
 
-	if (active_target.no_stdlib) return;
+	if (no_stdlib()) return;
 
 	const char *panicf = "std::core::builtin::panicf";
 	if (sema_splitpathref(panicf, strlen(panicf), &path, &ident) != TOKEN_IDENT || path == NULL || !ident)
@@ -359,7 +359,7 @@ RESOLVE_LAMBDA:;
 
 	assign_panicfn();
 
-	if (!active_target.no_strip_unused)
+	if (strip_unused())
 	{
 		sema_trace_liveness();
 	}