Suppress more warnings with [[maybe_unused]]

Author: alexreinking

src/CodeGen_PTX_Dev.cpp

@@ -551,7 +551,7 @@ void CodeGen_PTX_Dev::codegen_vector_reduce(const VectorReduce *op, const Expr &
     CodeGen_LLVM::codegen_vector_reduce(op, init);
 }
 
-string CodeGen_PTX_Dev::march() const {
+[[maybe_unused]] string CodeGen_PTX_Dev::march() const {
     return "nvptx64";
 }
 

src/CodeGen_Vulkan_Dev.cpp

@@ -476,7 +476,7 @@ void CodeGen_Vulkan_Dev::SPIRV_Emitter::scalarize(const Expr &e) {
     builder.update_id(result_id);
 }
 
-SpvId CodeGen_Vulkan_Dev::SPIRV_Emitter::map_type_to_pair(const Type &t) {
+[[maybe_unused]] SpvId CodeGen_Vulkan_Dev::SPIRV_Emitter::map_type_to_pair(const Type &t) {
     debug(2) << "CodeGen_Vulkan_Dev::SPIRV_Emitter::map_type_to_pair(): " << t << "\n";
     SpvId base_type_id = builder.declare_type(t);
     SpvBuilder::StructMemberTypes member_type_ids = {base_type_id, base_type_id};

src/Target.cpp

@@ -223,11 +223,11 @@ std::optional<T> getsysctl(const char *name) {
     return std::make_optional(value);
 }
 
-bool sysctl_is_set(const char *name) {
+[[maybe_unused]] bool sysctl_is_set(const char *name) {
     return getsysctl<int>(name).value_or(0);
 }
 
-bool is_armv7s() {
+[[maybe_unused]] bool is_armv7s() {
     return getsysctl<cpu_type_t>("hw.cputype") == CPU_TYPE_ARM &&
            getsysctl<cpu_subtype_t>("hw.cpusubtype") == CPU_SUBTYPE_ARM_V7S;
 }