[docs] Add ReST version of all the man pages.

 - The POD versions are slated for execution, but are still around until
   llvm.org machinery is in place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156384 91177308-0d34-0410-b5e6-96231b3b80d8

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+llvm-build - LLVM Project Build Utility
+=======================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-build** [*options*]
+
+
+DESCRIPTION
+-----------
+
+
+**llvm-build** is a tool for working with LLVM projects that use the LLVMBuild
+system for describing their components.
+
+At heart, **llvm-build** is responsible for loading, verifying, and manipulating
+the project's component data. The tool is primarily designed for use in
+implementing build systems and tools which need access to the project structure
+information.
+
+
+OPTIONS
+-------
+
+
+
+**-h**, **--help**
+
+ Print the builtin program help.
+
+
+
+**--source-root**\ =\ *PATH*
+
+ If given, load the project at the given source root path. If this option is not
+ given, the location of the project sources will be inferred from the location of
+ the **llvm-build** script itself.
+
+
+
+**--print-tree**
+
+ Print the component tree for the project.
+
+
+
+**--write-library-table**
+
+ Write out the C++ fragment which defines the components, library names, and
+ required libraries. This C++ fragment is built into llvm-config|llvm-config
+ in order to provide clients with the list of required libraries for arbitrary
+ component combinations.
+
+
+
+**--write-llvmbuild**
+
+ Write out new *LLVMBuild.txt* files based on the loaded components. This is
+ useful for auto-upgrading the schema of the files. **llvm-build** will try to a
+ limited extent to preserve the comments which were written in the original
+ source file, although at this time it only preserves block comments that preceed
+ the section names in the *LLVMBuild* files.
+
+
+
+**--write-cmake-fragment**
+
+ Write out the LLVMBuild in the form of a CMake fragment, so it can easily be
+ consumed by the CMake based build system. The exact contents and format of this
+ file are closely tied to how LLVMBuild is integrated with CMake, see LLVM's
+ top-level CMakeLists.txt.
+
+
+
+**--write-make-fragment**
+
+ Write out the LLVMBuild in the form of a Makefile fragment, so it can easily be
+ consumed by a Make based build system. The exact contents and format of this
+ file are closely tied to how LLVMBuild is integrated with the Makefiles, see
+ LLVM's Makefile.rules.
+
+
+
+**--llvmbuild-source-root**\ =\ *PATH*
+
+ If given, expect the *LLVMBuild* files for the project to be rooted at the
+ given path, instead of inside the source tree itself. This option is primarily
+ designed for use in conjunction with **--write-llvmbuild** to test changes to
+ *LLVMBuild* schema.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-build** exits with 0 if operation was successful. Otherwise, it will exist
+with a non-zero value.