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47 lines
2.5 KiB
Diff
47 lines
2.5 KiB
Diff
Description: add a simple linker script to version LLVM symbols
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This patch adds a very simple linker script to version the lib's symbols
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and thus trying to avoid crashes if an application loads two different
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LLVM versions (as long as they do not share data between them).
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Note that we deliberately *don't* make LLVM_3.9 depend on LLVM_3.8:
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they're incompatible and the whole point of this patch is
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to tell the linker that.
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Author: Rebecca N. Palmer <rebecca_palmer@zoho.com>
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Author: Lisandro Damían Nicanor Pérez Meyer <lisandro@debian.org>
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Bug-Debian: https://bugs.debian.org/848368
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Index: llvm-toolchain-4.0_4.0~svn299455/tools/llvm-shlib/CMakeLists.txt
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===================================================================
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--- llvm-toolchain-4.0_4.0~svn299455.orig/tools/llvm-shlib/CMakeLists.txt
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+++ llvm-toolchain-4.0_4.0~svn299455/tools/llvm-shlib/CMakeLists.txt
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@@ -40,7 +40,7 @@ set_property(TARGET LLVM PROPERTY VERSIO
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list(REMOVE_DUPLICATES LIB_NAMES)
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if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" OR MINGW) # FIXME: It should be "GNU ld for elf"
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# GNU ld doesn't resolve symbols in the version script.
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- set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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+ set(LIB_NAMES -Wl,--version-script,${CMAKE_CURRENT_SOURCE_DIR}/simple_version_script.map -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
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elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
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set(LIB_NAMES -Wl,-all_load ${LIB_NAMES})
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endif()
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Index: llvm-toolchain-4.0_4.0~svn299455/tools/llvm-shlib/simple_version_script.map
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===================================================================
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--- /dev/null
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+++ llvm-toolchain-4.0_4.0~svn299455/tools/llvm-shlib/simple_version_script.map
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@@ -0,0 +1 @@
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+LLVM_4.0 { global: *; };
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Index: llvm-toolchain-4.0_4.0~svn299455/cmake/modules/AddLLVM.cmake
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===================================================================
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--- llvm-toolchain-4.0_4.0~svn299455.orig/cmake/modules/AddLLVM.cmake
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+++ llvm-toolchain-4.0_4.0~svn299455/cmake/modules/AddLLVM.cmake
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@@ -82,7 +82,7 @@ function(add_llvm_symbol_exports target_
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set(native_export_file "${target_name}.exports")
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# FIXME: Don't write the "local:" line on OpenBSD.
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add_custom_command(OUTPUT ${native_export_file}
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- COMMAND echo "{" > ${native_export_file}
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+ COMMAND echo "LLVM_4.0 {" > ${native_export_file}
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COMMAND grep -q "[[:alnum:]]" ${export_file} && echo " global:" >> ${native_export_file} || :
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COMMAND sed -e "s/$/;/" -e "s/^/ /" < ${export_file} >> ${native_export_file}
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COMMAND echo " local: *;" >> ${native_export_file}
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