[libc-commits] [libc] [libc] Output all headers with LIBC_CONF_OUTPUT_ALL_HEADERS (PR #144114)

[William Huynh via libc-commits]

https://github.com/saturn691 created https://github.com/llvm/llvm-project/pull/144114

Following discussion from https://discourse.llvm.org/t/missing-declarations-in-header-files/86678, we decided to add a flag to output all headers. Requires #144049.

- Allows outputting all headers
- Minor whitespace change for alignment

>From d3f4b77142d0db98ed46d3f62d5c24597acc87d8 Mon Sep 17 00:00:00 2001
From: William Huynh <William.Huynh at arm.com>
Date: Fri, 13 Jun 2025 17:33:29 +0100
Subject: [PATCH] [libc] Output all headers with LIBC_CONF_OUTPUT_ALL_HEADERS

---
 libc/cmake/modules/LLVMLibCHeaderRules.cmake | 7 ++++++-
 libc/test/UnitTest/CMakeLists.txt            | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/libc/cmake/modules/LLVMLibCHeaderRules.cmake b/libc/cmake/modules/LLVMLibCHeaderRules.cmake
index 99f90244e0134..add58756dfc17 100644
--- a/libc/cmake/modules/LLVMLibCHeaderRules.cmake
+++ b/libc/cmake/modules/LLVMLibCHeaderRules.cmake
@@ -97,8 +97,13 @@ function(add_gen_header target_name)
   set(out_file ${LIBC_INCLUDE_DIR}/${relative_path})
   set(dep_file "${out_file}.d")
   set(yaml_file ${CMAKE_SOURCE_DIR}/${ADD_GEN_HDR_YAML_FILE})
+  
+  if(LIBC_CONF_OUTPUT_ALL_HEADERS)
+    set(entry_points "")
+  else()
+    set(entry_points "${TARGET_ENTRYPOINT_NAME_LIST}")
+  endif()
 
-  set(entry_points "${TARGET_ENTRYPOINT_NAME_LIST}")
   list(TRANSFORM entry_points PREPEND "--entry-point=")
 
   add_custom_command(
diff --git a/libc/test/UnitTest/CMakeLists.txt b/libc/test/UnitTest/CMakeLists.txt
index b0a3a7431c222..c32809da577d4 100644
--- a/libc/test/UnitTest/CMakeLists.txt
+++ b/libc/test/UnitTest/CMakeLists.txt
@@ -35,7 +35,7 @@ function(add_unittest_framework_library name)
   else()
     _get_common_test_compile_options(compile_options "" "")
     target_compile_options(${name}.unit PRIVATE ${compile_options})
-endif()
+  endif()
 
   _get_hermetic_test_compile_options(compile_options "")
   target_include_directories(${name}.hermetic PRIVATE ${LIBC_INCLUDE_DIR})