llvm-project/clang/test/SemaCXX/attr-section.cpp

// RUN: %clang_cc1 -verify -fsyntax-only -triple x86_64-linux-gnu %s

int x __attribute__((section(
   42)));  // expected-error {{'section' attribute requires a string}}


// PR6007
void test() {
  __attribute__((section("NEAR,x"))) int n1; // expected-error {{'section' attribute only applies to functions, global variables, Objective-C methods, and Objective-C properties}}
  __attribute__((section("NEAR,x"))) static int n2; // ok.
}

// pr9356
void __attribute__((section("foo"))) test2(); // expected-note {{previous attribute is here}}
void __attribute__((section("bar"))) test2() {} // expected-warning {{section does not match previous declaration}}

enum __attribute__((section("NEAR,x"))) e { one }; // expected-error {{'section' attribute only applies to}}

extern int a; // expected-note {{previous declaration is here}}
int *b = &a;
extern int a __attribute__((section("foo,zed"))); // expected-warning {{section attribute is specified on redeclared variable}}

// Not a warning.
extern int c;
int c __attribute__((section("foo,zed")));

// Also OK.
struct r_debug {};
extern struct r_debug _r_debug;
struct r_debug _r_debug __attribute__((nocommon, section(".r_debug,bar")));

namespace override {
  struct A {
    __attribute__((section("foo"))) virtual void f(){};
  };
  struct B : A {
    void f() {} // ok
  };
  struct C : A {
    __attribute__((section("bar"))) void f(); // expected-note {{previous}}
  };
  __attribute__((section("baz"))) // expected-warning {{section does not match}}
  void C::f() {}
}

// Check for section type conflicts between global variables and function templates
template <typename> __attribute__((section("template_fn1"))) void template_fn1() {} // expected-note {{declared here}}
const int const_global_var __attribute__((section("template_fn1"))) = 42;           // expected-error {{'const_global_var' causes a section type conflict with 'template_fn1'}}
int mut_global_var __attribute__((section("template_fn2"))) = 42;                   // expected-note {{declared here}}
template <typename> __attribute__((section("template_fn2"))) void template_fn2() {} // expected-error {{'template_fn2' causes a section type conflict with 'mut_global_var'}}