[runtimes] Add the ability to customize the output name of libc++, libc++abi and libunwind

We already had the ability to do that for libc++.dylib, so this only adds
consistency for all the runtime libraries. This should allow working around
difficulties on AIX as described in https://llvm.org/D134221.

Differential Revision: https://reviews.llvm.org/D135669

libcxx/CMakeLists.txt

@@ -407,8 +407,8 @@ set(LIBCXX_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}/c++/v1" CACHE PATH
 set(LIBCXX_INSTALL_RUNTIME_DIR "${CMAKE_INSTALL_BINDIR}" CACHE PATH
     "Path where built libc++ runtime libraries should be installed.")
 
-set(LIBCXX_SHARED_OUTPUT_NAME "c++" CACHE STRING
-    "Output name for the shared libc++ runtime library.")
+set(LIBCXX_SHARED_OUTPUT_NAME "c++" CACHE STRING "Output name for the shared libc++ runtime library.")
+set(LIBCXX_STATIC_OUTPUT_NAME "c++" CACHE STRING "Output name for the static libc++ runtime library.")
 
 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
   set(LIBCXX_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE})

libcxx/src/CMakeLists.txt

@@ -300,7 +300,7 @@ if (LIBCXX_ENABLE_STATIC)
     PROPERTIES
       COMPILE_FLAGS "${LIBCXX_COMPILE_FLAGS}"
       LINK_FLAGS    "${LIBCXX_LINK_FLAGS}"
-      OUTPUT_NAME   "c++"
+      OUTPUT_NAME   "${LIBCXX_STATIC_OUTPUT_NAME}"
   )
   cxx_add_common_build_flags(cxx_static)
   cxx_set_common_defines(cxx_static)

libcxxabi/CMakeLists.txt

@@ -79,6 +79,9 @@ set(LIBCXXABI_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}" CACHE STRING
 option(LIBCXXABI_INSTALL_HEADERS "Install the libc++abi headers." ON)
 option(LIBCXXABI_INSTALL_LIBRARY "Install the libc++abi library." ON)
 
+set(LIBCXXABI_SHARED_OUTPUT_NAME "c++abi" CACHE STRING "Output name for the shared libc++abi runtime library.")
+set(LIBCXXABI_STATIC_OUTPUT_NAME "c++abi" CACHE STRING "Output name for the static libc++abi runtime library.")
+
 set(LIBCXXABI_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}/c++/v1" CACHE PATH "Path to install the libc++abi headers at.")
 
 if(LLVM_LIBRARY_OUTPUT_INTDIR)

libcxxabi/src/CMakeLists.txt

@@ -187,7 +187,7 @@ if (LIBCXXABI_ENABLE_SHARED)
   set_target_properties(cxxabi_shared
     PROPERTIES
       LINK_FLAGS "${LIBCXXABI_LINK_FLAGS}"
-      OUTPUT_NAME "c++abi"
+      OUTPUT_NAME "${LIBCXXABI_SHARED_OUTPUT_NAME}"
       SOVERSION "1"
       VERSION "${LIBCXXABI_LIBRARY_VERSION}"
   )
@@ -285,7 +285,7 @@ if (LIBCXXABI_ENABLE_STATIC)
   set_target_properties(cxxabi_static
     PROPERTIES
       LINK_FLAGS "${LIBCXXABI_LINK_FLAGS}"
-      OUTPUT_NAME "c++abi"
+      OUTPUT_NAME "${LIBCXXABI_STATIC_OUTPUT_NAME}"
     )
   target_link_libraries(cxxabi_static
     PUBLIC cxxabi_static_objects

libunwind/CMakeLists.txt

@@ -111,6 +111,9 @@ set(LIBUNWIND_INSTALL_INCLUDE_DIR "${CMAKE_INSTALL_INCLUDEDIR}" CACHE PATH
 set(LIBUNWIND_INSTALL_RUNTIME_DIR "${CMAKE_INSTALL_BINDIR}" CACHE PATH
     "Path where built libunwind runtime libraries should be installed.")
 
+set(LIBUNWIND_SHARED_OUTPUT_NAME "unwind" CACHE STRING "Output name for the shared libunwind runtime library.")
+set(LIBUNWIND_STATIC_OUTPUT_NAME "unwind" CACHE STRING "Output name for the static libunwind runtime library.")
+
 if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
   set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE})
   set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE PATH

libunwind/src/CMakeLists.txt

@@ -161,7 +161,7 @@ if (LIBUNWIND_ENABLE_SHARED)
     PROPERTIES
       LINK_FLAGS "${LIBUNWIND_LINK_FLAGS}"
       LINKER_LANGUAGE C
-      OUTPUT_NAME "unwind"
+      OUTPUT_NAME "${LIBUNWIND_SHARED_OUTPUT_NAME}"
       VERSION "1.0"
       SOVERSION "1"
   )
@@ -201,7 +201,7 @@ if (LIBUNWIND_ENABLE_STATIC)
     PROPERTIES
       LINK_FLAGS "${LIBUNWIND_LINK_FLAGS}"
       LINKER_LANGUAGE C
-      OUTPUT_NAME "unwind"
+      OUTPUT_NAME "${LIBUNWIND_STATIC_OUTPUT_NAME}"
   )
 
   list(APPEND LIBUNWIND_BUILD_TARGETS "unwind_static")