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[CMake] Default to static linking for subprojects.

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Pass plugins introduced in D61446 do not support dynamic linking on
Windows, hence the option LLVM_${name_upper}_LINK_INTO_TOOLS can only
work being set to "ON". Currently, it defaults to "OFF" such that such
plugins are inoperable by default on Windows. Change the default for
subprojects to follow LLVM_ENABLE_PROJECTS.

Reviewed By: serge-sans-paille, MaskRay

Differential Revision: https://reviews.llvm.org/D72372
This commit is contained in:
Michael Kruse 2020-02-24 11:51:00 -06:00
parent e1d17c0f1f
commit ae6946dfc3
1 changed files with 13 additions and 2 deletions
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15
cmake/modules/AddLLVM.cmake
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@ -859,14 +859,25 @@ endmacro(add_llvm_executable name)
#
# If NO_MODULE is specified, when option LLVM_${name_upper}_LINK_INTO_TOOLS is set to OFF,
# only an object library is built, and no module is built. This is specific to the Polly use case.
#
# The SUBPROJECT argument contains the LLVM project the plugin belongs
# to. If set, the plugin will link statically by default it if the
# project was enabled.
function(add_llvm_pass_plugin name)
cmake_parse_arguments(ARG
"NO_MODULE" "" ""
"NO_MODULE" "SUBPROJECT" ""
${ARGN})
string(TOUPPER ${name} name_upper)
option(LLVM_${name_upper}_LINK_INTO_TOOLS "Statically link ${name} into tools (if available)" OFF)
# Enable the plugin by default if it was explicitly enabled by the user.
# Note: If was set to "all", LLVM's CMakeLists.txt replaces it with a
# list of all projects, counting as explicitly enabled.
set(link_into_tools_default OFF)
if (ARG_SUBPROJECT AND LLVM_TOOL_${name_upper}_BUILD)
set(link_into_tools_default ON)
endif()
option(LLVM_${name_upper}_LINK_INTO_TOOLS "Statically link ${name} into tools (if available)" ${link_into_tools_default})
if(LLVM_${name_upper}_LINK_INTO_TOOLS)
list(REMOVE_ITEM ARG_UNPARSED_ARGUMENTS BUILDTREE_ONLY)