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[CMake] NFC. Add clang-tablegen-targets utility target 

By creating this target other projects that depend on clang-generated headers (like LLDB) will no longer be order-dependent on Clang being processed by CMake first.

Also, by creating a dummy of this target in ClangConfig.cmake, projects that can build against out-of-tree clang can freely depend on the target without needing to have conditionals for if clang is in-tree or out-of-tree.

llvm-svn: 309390
This commit is contained in:
Chris Bieneman 2017-07-28 15:33:47 +00:00
parent 5726589209
commit 6b5851bb4a
2 changed files with 9 additions and 1 deletions
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3
clang/CMakeLists.txt
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@ -412,7 +412,8 @@ add_subdirectory(include)
# All targets below may depend on all tablegen'd files.
get_property(CLANG_TABLEGEN_TARGETS GLOBAL PROPERTY CLANG_TABLEGEN_TARGETS)
list(APPEND LLVM_COMMON_DEPENDS ${CLANG_TABLEGEN_TARGETS})
add_custom_target(clang-tablegen-targets DEPENDS ${CLANG_TABLEGEN_TARGETS})
list(APPEND LLVM_COMMON_DEPENDS clang-tablegen-targets)
# Force target to be built as soon as possible. Clang modules builds depend
# header-wise on it as they ship all headers from the umbrella folders. Building

7
clang/cmake/modules/ClangConfig.cmake.in
View File

@ -11,3 +11,10 @@ set(CLANG_INCLUDE_DIRS "@CLANG_CONFIG_INCLUDE_DIRS@")
# Provide all our library targets to users.
include("@CLANG_CONFIG_EXPORTS_FILE@")
# By creating clang-tablegen-targets here, subprojects that depend on Clang's
# tablegen-generated headers can always depend on this target whether building
# in-tree with Clang or not.
if(NOT TARGET clang-tablegen-targets)
add_custom_target(clang-tablegen-targets)
endif()