Rewrite the CMake build to use explicit dependencies between libraries,

specified in the same file that the library itself is created. This is
more idiomatic for CMake builds, and also allows us to correctly specify
dependencies that are missed due to bugs in the GenLibDeps perl script,
or change from compiler to compiler. On Linux, this returns CMake to
a place where it can relably rebuild several targets of LLVM.

I have tried not to change the dependencies from the ones in the current
auto-generated file. The only places I've really diverged are in places
where I was seeing link failures, and added a dependency. The goal of
this patch is not to start changing the dependencies, merely to move
them into the correct location, and an explicit form that we can control
and change when necessary.

This also removes a serialization point in the build because we don't
have to scan all the libraries before we begin building various tools.
We no longer have a step of the build that regenerates a file inside the
source tree. A few other associated cleanups fall out of this.

This isn't really finished yet though. After talking to dgregor he urged
switching to a single CMake macro to construct libraries with both
sources and dependencies in the arguments. Migrating from the two macros
to that style will be a follow-up patch.

Also, llvm-config is still generated with GenLibDeps.pl, which means it
still has slightly buggy dependencies. The internal CMake
'llvm-config-like' macro uses the correct explicitly specified
dependencies however. A future patch will switch llvm-config generation
(when using CMake) to be based on these deps as well.

This may well break Windows. I'm getting a machine set up now to dig
into any failures there. If anyone can chime in with problems they see
or ideas of how to solve them for Windows, much appreciated.

llvm-svn: 136433

6 files changed, 49 insertions, 1 deletions

diff --git a/llvm/lib/Target/ARM/AsmParser/CMakeLists.txt b/llvm/lib/Target/ARM/AsmParser/CMakeLists.txt
index 88393e313a8..3f5ad39debc 100644
--- a/llvm/lib/Target/ARM/AsmParser/CMakeLists.txt
+++ b/llvm/lib/Target/ARM/AsmParser/CMakeLists.txt
@@ -4,4 +4,13 @@ add_llvm_library(LLVMARMAsmParser
   ARMAsmLexer.cpp
   ARMAsmParser.cpp
   )
+
 add_dependencies(LLVMARMAsmParser ARMCommonTableGen)
+
+add_llvm_library_dependencies(LLVMARMAsmParser
+  LLVMARMDesc
+  LLVMARMInfo
+  LLVMMC
+  LLVMMCParser
+  LLVMSupport
+  )
diff --git a/llvm/lib/Target/ARM/CMakeLists.txt b/llvm/lib/Target/ARM/CMakeLists.txt
index 8394be52cd1..42b450959f3 100644
--- a/llvm/lib/Target/ARM/CMakeLists.txt
+++ b/llvm/lib/Target/ARM/CMakeLists.txt
@@ -50,6 +50,20 @@ add_llvm_target(ARMCodeGen
   Thumb2SizeReduction.cpp
   )
 
+add_llvm_library_dependencies(LLVMARMCodeGen
+  LLVMARMAsmPrinter
+  LLVMARMDesc
+  LLVMARMInfo
+  LLVMAnalysis
+  LLVMAsmPrinter
+  LLVMCodeGen
+  LLVMCore
+  LLVMMC
+  LLVMSelectionDAG
+  LLVMSupport
+  LLVMTarget
+  )
+
 # workaround for hanging compilation on MSVC10
 if( MSVC_VERSION EQUAL 1600 )
 set_property(
diff --git a/llvm/lib/Target/ARM/Disassembler/CMakeLists.txt b/llvm/lib/Target/ARM/Disassembler/CMakeLists.txt
index a4238aae54f..952dab53ec7 100644
--- a/llvm/lib/Target/ARM/Disassembler/CMakeLists.txt
+++ b/llvm/lib/Target/ARM/Disassembler/CMakeLists.txt
@@ -12,3 +12,11 @@ set_property(
   )
 endif()
 add_dependencies(LLVMARMDisassembler ARMCommonTableGen)
+
+add_llvm_library_dependencies(LLVMARMDisassembler
+  LLVMARMCodeGen
+  LLVMARMDesc
+  LLVMARMInfo
+  LLVMMC
+  LLVMSupport
+  )
diff --git a/llvm/lib/Target/ARM/InstPrinter/CMakeLists.txt b/llvm/lib/Target/ARM/InstPrinter/CMakeLists.txt
index 7b6193aeeff..fa0b4957ccd 100644
--- a/llvm/lib/Target/ARM/InstPrinter/CMakeLists.txt
+++ b/llvm/lib/Target/ARM/InstPrinter/CMakeLists.txt
@@ -3,4 +3,10 @@ include_directories( ${CMAKE_CURRENT_BINARY_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR}/
 add_llvm_library(LLVMARMAsmPrinter
   ARMInstPrinter.cpp
   )
+
 add_dependencies(LLVMARMAsmPrinter ARMCommonTableGen)
+
+add_llvm_library_dependencies(LLVMARMAsmPrinter
+  LLVMMC
+  LLVMSupport
+  )
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/CMakeLists.txt b/llvm/lib/Target/ARM/MCTargetDesc/CMakeLists.txt
index df2cf81be2c..83fd641c31a 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/CMakeLists.txt
+++ b/llvm/lib/Target/ARM/MCTargetDesc/CMakeLists.txt
@@ -11,4 +11,9 @@ add_dependencies(LLVMARMDesc ARMCommonTableGen)
 # Hack: we need to include 'main' target directory to grab private headers
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/.. ${CMAKE_CURRENT_BINARY_DIR}/..)
 
-target_link_libraries(LLVMARMDesc LLVMARMAsmPrinter)
+add_llvm_library_dependencies(LLVMARMDesc
+  LLVMARMInfo
+  LLVMARMAsmPrinter
+  LLVMMC
+  LLVMSupport
+  )
diff --git a/llvm/lib/Target/ARM/TargetInfo/CMakeLists.txt b/llvm/lib/Target/ARM/TargetInfo/CMakeLists.txt
index 3910bb02e21..3ccd4c3d53a 100644
--- a/llvm/lib/Target/ARM/TargetInfo/CMakeLists.txt
+++ b/llvm/lib/Target/ARM/TargetInfo/CMakeLists.txt
@@ -5,3 +5,9 @@ add_llvm_library(LLVMARMInfo
   )
 
 add_dependencies(LLVMARMInfo ARMCodeGenTable_gen)
+
+add_llvm_library_dependencies(LLVMARMInfo
+  LLVMMC
+  LLVMSupport
+  LLVMTarget
+  )