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From 3dc5722d5c7673a879f2b4680369d3ac8b6b64b6 Mon Sep 17 00:00:00 2001
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From: Tom Stellard <tstellar@redhat.com>
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Date: Wed, 4 Aug 2021 14:05:38 -0700
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Subject: [PATCH] cmake: Allow shared libraries to customize the soname using
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LLVM_ABI_REVISION
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The LLVM_ABI_REVISION variable is intended to be used for release
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candidates which introduce an ABI change to a shared library. This
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variable can be specified per library, so there is not one global value
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for all of LLVM.
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For example, if we LLVM X.0.0-rc2 introduces an ABI change for a library
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compared with LLVM X.0.0-rc1, then the LLVM_ABI_REVISION number for
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library will be incremented by 1.
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In the main branch, LLVM_ABI_REVISION should always be 0, it is only
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meant to be used in the release branch.
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Differential Revision: https://reviews.llvm.org/D105594
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---
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clang/tools/clang-shlib/CMakeLists.txt | 5 +++++
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3 files changed, 19 insertions(+), 2 deletions(-)
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diff --git a/clang/tools/clang-shlib/CMakeLists.txt b/clang/tools/clang-shlib/CMakeLists.txt
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index 9c1f8ea452b3..4d785924e4bb 100644
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--- a/clang/tools/clang-shlib/CMakeLists.txt
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+++ b/clang/tools/clang-shlib/CMakeLists.txt
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@@ -1,3 +1,8 @@
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+# In the main branch, LLVM_ABI_REVISION should always be 0. In the release
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+# branches, this should be incremented before each release candidate every
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+# time the ABI of libclang-cpp.so changes.
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+set(LLVM_ABI_REVISION 0)
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+
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# Building libclang-cpp.so fails if LLVM_ENABLE_PIC=Off
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if (NOT LLVM_ENABLE_PIC)
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return()
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--
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2.27.0
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