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[libc++] Introduce LIBCXX_LIBRARY_VERSION 

This allows controlling the current_version linker property on Apple
platforms.

Differential Revision: https://reviews.llvm.org/D125686
This commit is contained in:
Louis Dionne 2022-05-16 09:50:56 -04:00
parent df2a4eae6b
commit 6de59ca417
2 changed files with 9 additions and 2 deletions
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9
libcxx/CMakeLists.txt
View File

@ -177,7 +177,14 @@ if (LIBCXX_ABI_UNSTABLE)
else()
set(abi_version "1")
endif()
set(LIBCXX_ABI_VERSION "${abi_version}" CACHE STRING "ABI version of libc++. Can be either 1 or 2, where 2 is currently the unstable ABI. Defaults to 1 unless LIBCXX_ABI_UNSTABLE is specified, in which case this is 2.")
set(LIBCXX_ABI_VERSION "${abi_version}" CACHE STRING
"ABI version of libc++. Can be either 1 or 2, where 2 is currently the unstable ABI.
Defaults to 1 unless LIBCXX_ABI_UNSTABLE is specified, in which case this is 2.")
set(LIBCXX_LIBRARY_VERSION "${LIBCXX_ABI_VERSION}.0" CACHE STRING
"Version of libc++. This will be reflected in the name of the shared library produced.
For example, -DLIBCXX_LIBRARY_VERSION=x.y will result in the library being named
libc++.x.y.dylib, along with the usual symlinks pointing to that. On Apple platforms,
this also controls the linker's 'current_version' property.")
set(LIBCXX_ABI_NAMESPACE "__${LIBCXX_ABI_VERSION}" CACHE STRING "The inline ABI namespace used by libc++. It defaults to __n where `n` is the current ABI version.")
if (NOT LIBCXX_ABI_NAMESPACE MATCHES "__.*")
message(FATAL_ERROR "LIBCXX_ABI_NAMESPACE must be a reserved identifier.")

2
libcxx/src/CMakeLists.txt
View File

@ -211,7 +211,7 @@ if (LIBCXX_ENABLE_SHARED)
COMPILE_FLAGS "${LIBCXX_COMPILE_FLAGS}"
LINK_FLAGS "${LIBCXX_LINK_FLAGS}"
OUTPUT_NAME "c++"
VERSION "${LIBCXX_ABI_VERSION}.0"
VERSION "${LIBCXX_LIBRARY_VERSION}"
SOVERSION "${LIBCXX_ABI_VERSION}"
DEFINE_SYMBOL ""
)