Add `-reloc-mode:<string>`

src/build_settings.cpp

@@ -189,6 +189,13 @@ enum ErrorPosStyle {
 	ErrorPosStyle_COUNT
 };
 
+enum RelocMode {
+	RelocMode_Default,
+	RelocMode_Static,
+	RelocMode_PIC,
+	RelocMode_DynamicNoPIC,
+};
+
 // This stores the information for the specify architecture of this build
 struct BuildContext {
 	// Constants
@@ -270,6 +277,8 @@ struct BuildContext {
 	
 	bool copy_file_contents;
 
+	RelocMode reloc_mode;
+
 
 	u32 cmd_doc_flags;
 	Array<String> extra_packages;

src/llvm_backend.cpp

@@ -1308,6 +1308,20 @@ void lb_generate_code(lbGenerator *gen) {
 		reloc_mode = LLVMRelocPIC;
 	}
 
+	switch (build_context.reloc_mode) {
+	case RelocMode_Default:
+		break;
+	case RelocMode_Static:
+		reloc_mode = LLVMRelocStatic;
+		break;
+	case RelocMode_PIC:
+		reloc_mode = LLVMRelocPIC;
+		break;
+	case RelocMode_DynamicNoPIC:
+		reloc_mode = LLVMRelocDynamicNoPic;
+		break;
+	}
+
 	for_array(i, gen->modules.entries) {
 		target_machines[i] = LLVMCreateTargetMachine(
 			target, target_triple, llvm_cpu,

src/main.cpp

@@ -625,6 +625,8 @@ enum BuildFlagKind {
 	BuildFlag_ExtraAssemblerFlags,
 	BuildFlag_Microarch,
 
+	BuildFlag_RelocMode,
+
 	BuildFlag_TestName,
 
 	BuildFlag_DisallowDo,
@@ -779,6 +781,8 @@ bool parse_build_flags(Array<String> args) {
 	add_flag(&build_flags, BuildFlag_ExtraAssemblerFlags, str_lit("extra-assembler-flags"),         BuildFlagParam_String, Command__does_build);
 	add_flag(&build_flags, BuildFlag_Microarch,         str_lit("microarch"),                       BuildFlagParam_String, Command__does_build);
 
+	add_flag(&build_flags, BuildFlag_RelocMode,        str_lit("reloc-mode"),                       BuildFlagParam_String, Command__does_build);
+
 	add_flag(&build_flags, BuildFlag_TestName,         str_lit("test-name"),                       BuildFlagParam_String, Command_test);
 
 	add_flag(&build_flags, BuildFlag_DisallowDo,            str_lit("disallow-do"),              BuildFlagParam_None, Command__does_check);
@@ -1339,6 +1343,28 @@ bool parse_build_flags(Array<String> args) {
 							string_to_lower(&build_context.microarch);
 							break;
 						}
+						case BuildFlag_RelocMode: {
+							GB_ASSERT(value.kind == ExactValue_String);
+							String v = value.value_string;
+							if (v == "default") {
+								build_context.reloc_mode = RelocMode_Default;
+							} else if (v == "static") {
+								build_context.reloc_mode = RelocMode_Static;
+							} else if (v == "pic") {
+								build_context.reloc_mode = RelocMode_PIC;
+							} else if (v == "dynamic-no-pic") {
+								build_context.reloc_mode = RelocMode_DynamicNoPIC;
+							} else {
+								gb_printf_err("-reloc-mode flag expected one of the following\n");
+								gb_printf_err("\tdefault\n");
+								gb_printf_err("\tstatic\n");
+								gb_printf_err("\tpic\n");
+								gb_printf_err("\tdynamic-no-pic\n");
+								bad_flags = true;
+							}
+
+							break;
+						}
 						case BuildFlag_TestName: {
 							GB_ASSERT(value.kind == ExactValue_String);
 							{