[PATCH] D115535: [libunwind] Provide a way to conveniently install libunwind headers

[PoYao Chang via Phabricator via llvm-commits]

rZhBoYao created this revision.
rZhBoYao added reviewers: compnerd, jgorbe, mstorsjo, ldionne.
rZhBoYao added a project: libunwind.
Herald added subscribers: libcxx-commits, mgorny.
Herald added a reviewer: libunwind.
rZhBoYao requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

This adds a CMake option (defaults to OFF) to activate 2 new targets `install-unwind-headers` and `install-unwind-headers-stripped`.
So, for example, these would install libunwind headers:

  cmake -S runtimes -B build -G Ninja \
  -DLLVM_ENABLE_RUNTIMES='libcxx;libcxxabi;libunwind' \
  -DLIBUNWIND_INSTALL_HEADERS=ON

And then, `ninja -C build install` for the whole package or simply `ninja -C build install-unwind-headers`.

Other than that, currently, `install-unwind` doesn't `DEPENDS` on `install-unwind-headers`, not sure if this is alright.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115535

Files:
  libunwind/CMakeLists.txt
  libunwind/include/CMakeLists.txt


Index: libunwind/include/CMakeLists.txt
===================================================================
--- /dev/null
+++ libunwind/include/CMakeLists.txt
@@ -0,0 +1,29 @@
+set(files
+    __libunwind_config.h
+    libunwind.h
+    unwind_arm_ehabi.h
+    unwind_itanium.h
+    unwind.h
+    )
+
+add_library(unwind-headers INTERFACE)
+
+install(FILES ${files}
+  DESTINATION include
+  COMPONENT unwind-headers
+  PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
+)
+
+if(NOT CMAKE_CONFIGURATION_TYPES AND LIBUNWIND_INSTALL_LIBRARY)
+  add_custom_target(install-unwind-headers
+    DEPENDS unwind-headers
+    COMMAND "${CMAKE_COMMAND}"
+            -DCMAKE_INSTALL_COMPONENT=unwind-headers
+            -P "${LIBUNWIND_BINARY_DIR}/cmake_install.cmake")
+  add_custom_target(install-unwind-headers-stripped
+    DEPENDS unwind-headers
+    COMMAND "${CMAKE_COMMAND}"
+            -DCMAKE_INSTALL_COMPONENT=unwind-headers
+            -DCMAKE_INSTALL_DO_STRIP=1
+            -P "${LIBUNWIND_BINARY_DIR}/cmake_install.cmake")
+endif()
Index: libunwind/CMakeLists.txt
===================================================================
--- libunwind/CMakeLists.txt
+++ libunwind/CMakeLists.txt
@@ -78,6 +78,7 @@
 option(LIBUNWIND_IS_BAREMETAL "Build libunwind for baremetal targets." OFF)
 option(LIBUNWIND_USE_FRAME_HEADER_CACHE "Cache frame headers for unwinding. Requires locking dl_iterate_phdr." OFF)
 option(LIBUNWIND_REMEMBER_HEAP_ALLOC "Use heap instead of the stack for .cfi_remember_state." OFF)
+option(LIBUNWIND_INSTALL_HEADERS "Install the libunwind headers." OFF)
 
 set(LIBUNWIND_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
     "Define suffix of library directory name (32/64)")
@@ -383,3 +384,7 @@
 if (LIBUNWIND_INCLUDE_TESTS AND EXISTS ${LLVM_CMAKE_DIR})
   add_subdirectory(test)
 endif()
+
+if(LIBUNWIND_INSTALL_HEADERS)
+  add_subdirectory(include)
+endif()


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