[libc] add proxy header for struct_sigaction (#96224)

Author: SchrodingerZhu

libc/hdr/types/CMakeLists.txt

@@ -126,3 +126,12 @@ add_proxy_header_library(
     libc.include.llvm-libc-types.atexithandler_t
     libc.include.stdlib
 )
+
+add_proxy_header_library(
+  struct_sigaction
+  HDRS
+    struct_sigaction.h
+  FULL_BUILD_DEPENDS
+    libc.include.llvm-libc-types.struct_sigaction
+    libc.include.signal
+)

libc/hdr/types/struct_sigaction.h

@@ -0,0 +1,21 @@
+//===-- Proxy for struct sigaction  ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_LIBC_HDR_TYPES_STRUCT_SIGACTION_H
+#define LLVM_LIBC_HDR_TYPES_STRUCT_SIGACTION_H
+
+#ifdef LIBC_FULL_BUILD
+
+#include "include/llvm-libc-types/struct_sigaction.h"
+
+#else
+
+#include <signal.h>
+
+#endif // LIBC_FULL_BUILD
+
+#endif // LLVM_LIBC_HDR_TYPES_STRUCT_SIGACTION_H

libc/src/signal/linux/CMakeLists.txt

@@ -60,6 +60,7 @@ add_entrypoint_object(
   DEPENDS
     .__restore
     libc.hdr.types.sigset_t
+    libc.hdr.types.struct_sigaction
     libc.include.sys_syscall
     libc.src.__support.OSUtil.osutil
     libc.src.errno.errno
@@ -124,7 +125,7 @@ add_entrypoint_object(
     ../signal.h
   DEPENDS
     .sigaction
-    libc.include.signal
+    libc.hdr.signal_macros
 )
 
 add_entrypoint_object(

libc/src/signal/linux/signal.cpp

@@ -7,11 +7,9 @@
 //===----------------------------------------------------------------------===//
 
 #include "src/signal/signal.h"
-#include "src/signal/sigaction.h"
-
+#include "hdr/signal_macros.h"
 #include "src/__support/common.h"
-
-#include <signal.h>
+#include "src/signal/sigaction.h"
 
 namespace LIBC_NAMESPACE {
 

libc/src/signal/sigaction.h

@@ -9,7 +9,7 @@
 #ifndef LLVM_LIBC_SRC_SIGNAL_SIGACTION_H
 #define LLVM_LIBC_SRC_SIGNAL_SIGACTION_H
 
-#include <signal.h>
+#include "hdr/types/struct_sigaction.h"
 
 namespace LIBC_NAMESPACE {
 

libc/test/src/signal/CMakeLists.txt

@@ -32,8 +32,8 @@ add_libc_unittest(
   SRCS
     sigaction_test.cpp
   DEPENDS
-    libc.include.errno
-    libc.include.signal
+    libc.hdr.errno_macros
+    libc.hdr.signal_macros
     libc.src.signal.raise
     libc.src.signal.sigaction
     libc.test.UnitTest.ErrnoSetterMatcher
@@ -119,7 +119,7 @@ add_libc_unittest(
   SRCS
     sigaltstack_test.cpp
   DEPENDS
-    libc.include.signal
+    libc.hdr.signal_macros
     libc.src.errno.errno
     libc.src.signal.raise
     libc.src.signal.sigaltstack

libc/test/src/signal/sigaction_test.cpp

@@ -6,15 +6,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "hdr/errno_macros.h"
+#include "hdr/signal_macros.h"
 #include "src/signal/raise.h"
 #include "src/signal/sigaction.h"
-
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
-#include <errno.h>
-#include <signal.h>
-
 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
 

libc/test/src/signal/sigaltstack_test.cpp

@@ -6,17 +6,16 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "hdr/signal_macros.h"
 #include "src/__support/OSUtil/syscall.h" // For internal syscall function.
 #include "src/errno/libc_errno.h"
 #include "src/signal/linux/signal_utils.h"
 #include "src/signal/raise.h"
 #include "src/signal/sigaction.h"
 #include "src/signal/sigaltstack.h"
-
 #include "test/UnitTest/ErrnoSetterMatcher.h"
 #include "test/UnitTest/Test.h"
 
-#include <signal.h>
 #include <stdint.h>
 #include <sys/syscall.h>