LibC: Don't use C++ attribute syntax in C-visible headers

Fixes errors when building Clang's compiler-rt, which compiles in C11
more.

4 files changed, 8 insertions, 8 deletions

diff --git a/Userland/Libraries/LibC/assert.h b/Userland/Libraries/LibC/assert.h
index b9756a46e8..b9231dd5d4 100644
--- a/Userland/Libraries/LibC/assert.h
+++ b/Userland/Libraries/LibC/assert.h
@@ -11,7 +11,7 @@
 __BEGIN_DECLS
 
 #ifdef DEBUG
-[[noreturn]] void __assertion_failed(const char* msg);
+__attribute__((noreturn)) void __assertion_failed(const char* msg);
 #    define __stringify_helper(x) #    x
 #    define __stringify(x) __stringify_helper(x)
 #    define assert(expr)                                                           \
@@ -24,7 +24,7 @@ __BEGIN_DECLS
 #    define VERIFY_NOT_REACHED() _abort()
 #endif
 
-[[noreturn]] void _abort();
+__attribute__((noreturn)) void _abort();
 
 #ifndef __cplusplus
 #    define static_assert _Static_assert
diff --git a/Userland/Libraries/LibC/cxxabi.cpp b/Userland/Libraries/LibC/cxxabi.cpp
index 502f22309d..c7af6660ba 100644
--- a/Userland/Libraries/LibC/cxxabi.cpp
+++ b/Userland/Libraries/LibC/cxxabi.cpp
@@ -104,7 +104,7 @@ void __cxa_finalize(void* dso_handle)
     __pthread_mutex_unlock(&atexit_mutex);
 }
 
-[[noreturn]] void __cxa_pure_virtual()
+__attribute__((noreturn)) void __cxa_pure_virtual()
 {
     VERIFY_NOT_REACHED();
 }
diff --git a/Userland/Libraries/LibC/ssp.cpp b/Userland/Libraries/LibC/ssp.cpp
index 2937c5da3e..dbc108bd6e 100644
--- a/Userland/Libraries/LibC/ssp.cpp
+++ b/Userland/Libraries/LibC/ssp.cpp
@@ -20,7 +20,7 @@ extern "C" {
 extern u32 __stack_chk_guard;
 u32 __stack_chk_guard = (u32)0xc6c7c8c9;
 
-[[noreturn]] void __stack_chk_fail()
+__attribute__((noreturn)) void __stack_chk_fail()
 {
     dbgln("Error: USERSPACE({}) Stack protector failure, stack smashing detected!", getpid());
     if (__stdio_is_initialized)
@@ -28,7 +28,7 @@ u32 __stack_chk_guard = (u32)0xc6c7c8c9;
     abort();
 }
 
-[[noreturn]] void __stack_chk_fail_local()
+__attribute__((noreturn)) void __stack_chk_fail_local()
 {
     __stack_chk_fail();
 }
diff --git a/Userland/Libraries/LibC/sys/internals.h b/Userland/Libraries/LibC/sys/internals.h
index e0f755d732..1ddebc0eb3 100644
--- a/Userland/Libraries/LibC/sys/internals.h
+++ b/Userland/Libraries/LibC/sys/internals.h
@@ -21,8 +21,8 @@ extern bool __stdio_is_initialized;
 
 int __cxa_atexit(AtExitFunction exit_function, void* parameter, void* dso_handle);
 void __cxa_finalize(void* dso_handle);
-[[noreturn]] void __cxa_pure_virtual() __attribute__((weak));
-[[noreturn]] void __stack_chk_fail();
-[[noreturn]] void __stack_chk_fail_local();
+__attribute__((noreturn)) void __cxa_pure_virtual() __attribute__((weak));
+__attribute__((noreturn)) void __stack_chk_fail();
+__attribute__((noreturn)) void __stack_chk_fail_local();
 
 __END_DECLS