[libc] Remove _Exit proxy func header and use LIBC_NAMESPACE::_Exit in tests (#114904)

This improves/fixes this pr
#114718. In this PR we removed
the _Exit proxy func because it was not needed. Instead we used
`LIBC_NAMESPACE::_Exit`

Author: Job Henandez Lara

libc/hdr/func/CMakeLists.txt

@@ -40,13 +40,3 @@ add_proxy_header_library(
   FULL_BUILD_DEPENDS
     libc.include.stdlib
 )
-
-add_proxy_header_library(
-  _Exit
-  HDRS
-    _Exit.h
-  DEPENDS
-    libc.hdr.stdlib_overlay
-  FULL_BUILD_DEPENDS
-    libc.include.stdlib
-)

libc/hdr/func/_Exit.h

@@ -382,7 +382,6 @@ if(LLVM_LIBC_FULL_BUILD)
     SRCS
       atexit_test.cpp
     DEPENDS
-      libc.hdr.func._Exit 
       libc.src.stdlib._Exit
       libc.src.stdlib.exit
       libc.src.stdlib.atexit
@@ -398,7 +397,7 @@ if(LLVM_LIBC_FULL_BUILD)
     SRCS
       at_quick_exit_test.cpp
     DEPENDS
-      libc.hdr.func._Exit 
+      libc.src.stdlib._Exit
       libc.src.stdlib.quick_exit
       libc.src.stdlib.at_quick_exit
       libc.src.__support.CPP.array

libc/test/src/stdlib/CMakeLists.txt

@@ -6,7 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "hdr/func/_Exit.h"
 #include "src/__support/CPP/array.h"
 #include "src/__support/CPP/utility.h"
 #include "src/stdlib/at_quick_exit.h"
@@ -34,7 +33,7 @@ TEST(LlvmLibcAtQuickExit, Basic) {
 
 TEST(LlvmLibcAtQuickExit, AtQuickExitCallsSysExit) {
   auto test = [] {
-    LIBC_NAMESPACE::at_quick_exit(+[] { _Exit(1); });
+    LIBC_NAMESPACE::at_quick_exit(+[] { LIBC_NAMESPACE::_Exit(1); });
     LIBC_NAMESPACE::quick_exit(0);
   };
   EXPECT_EXITS(test, 1);

libc/test/src/stdlib/at_quick_exit_test.cpp

@@ -6,7 +6,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "hdr/func/_Exit.h"
 #include "src/__support/CPP/array.h"
 #include "src/__support/CPP/utility.h"
 #include "src/stdlib/atexit.h"
@@ -34,7 +33,7 @@ TEST(LlvmLibcAtExit, Basic) {
 
 TEST(LlvmLibcAtExit, AtExitCallsSysExit) {
   auto test = [] {
-    LIBC_NAMESPACE::atexit(+[] { _Exit(1); });
+    LIBC_NAMESPACE::atexit(+[] { LIBC_NAMESPACE::_Exit(1); });
     LIBC_NAMESPACE::exit(0);
   };
   EXPECT_EXITS(test, 1);