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Fix MSVC dependency issue between Clang-tablegen and LLVM-tablegen

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Previously, when compiling Visual Studio targets, one could see random build errors. This was caused by tablegen projects using the same build folders.
This workaround simply chains tablegen projects.

Differential Revision: https://reviews.llvm.org/D54153

llvm-svn: 349541
This commit is contained in:
Alexandre Ganea 2018-12-18 21:03:06 +00:00
parent dff7e8c2a8
commit c1be8338e0
1 changed files with 6 additions and 0 deletions
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6
cmake/modules/TableGen.cmake
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@ -158,6 +158,12 @@ macro(add_tablegen target project)
llvm_ExternalProject_BuildCmd(tblgen_build_cmd ${target}
${LLVM_NATIVE_BUILD}
CONFIGURATION Release)
# Create an artificial dependency between tablegen projects, because they
# compile the same dependencies, thus using the same build folders.
# FIXME: A proper fix requires sequentially chaining tablegens.
if (NOT ${project} STREQUAL LLVM)
add_dependencies(${project}-tablegen-host LLVM-tablegen-host)
endif()
add_custom_command(OUTPUT ${${project}_TABLEGEN_EXE}
COMMAND ${tblgen_build_cmd}
DEPENDS CONFIGURE_LLVM_NATIVE ${target}