Sphinx-based clang man pages

Summary:
This diff introduces .rst files, Sphinx config, and a CMake target
for building clang man pages. This will deprecate the existing .pod-
based man page, and will integrate nicely with CMake. This diff does
not remove the existing man page; that will be done in a follow-up
once packagers have had a chance to react to the change.

For now, only clang(1) has been done; others can be added over time
by dropping additional files into the docs/CommandGuide directory.
The index page for CommandGuide has been copied from LLVM's
docs/CommandGuide.

The man page itself is mostly the same, with a few minor cosmetic
changes. The only major change is the SYNOPSIS section. I was unable
to get .rst/Sphinx produce the same style as in the existing man page.
Instead, I changed it to match the LLVM tools' relatively simple style.

To build the man pages, use the "docs-clang-man" target if building
with CMake. Otherwise, use "make -f Makefile.sphinx man".

Reviewers: cmatthews, silvas

Subscribers: dim, gaeke, beanz, cfe-commits

Differential Revision: http://reviews.llvm.org/D10562

llvm-svn: 241037

3 files changed, 0 insertions, 986 deletions

diff --git a/clang/docs/tools/Makefile b/clang/docs/tools/Makefile
deleted file mode 100644
index 5521d6b764c..00000000000
--- a/clang/docs/tools/Makefile
+++ /dev/null
@@ -1,116 +0,0 @@
-##===- docs/tools/Makefile ---------------------------------*- Makefile -*-===##
-# 
-#                     The LLVM Compiler Infrastructure
-#
-# This file is distributed under the University of Illinois Open Source
-# License. See LICENSE.TXT for details.
-# 
-##===----------------------------------------------------------------------===##
-
-ifdef BUILD_FOR_WEBSITE
-
-# FIXME: This was copied from the CommandGuide makefile. Figure out
-# how to get this stuff on the website.
-
-# This special case is for keeping the CommandGuide on the LLVM web site
-# up to date automatically as the documents are checked in. It must build
-# the POD files to HTML only and keep them in the src directories. It must also
-# build in an unconfigured tree, hence the ifdef. To use this, run
-# make -s BUILD_FOR_WEBSITE=1 inside the cvs commit script.
-SRC_DOC_DIR=
-DST_HTML_DIR=html/
-DST_MAN_DIR=man/man1/
-DST_PS_DIR=ps/
-CLANG_VERSION := trunk
-
-# If we are in BUILD_FOR_WEBSITE mode, default to the all target.
-all:: html man ps
-
-clean:
-	rm -f pod2htm*.*~~ $(HTML) $(MAN) $(PS)
-
-# To create other directories, as needed, and timestamp their creation
-%/.dir:
-	-mkdir $* > /dev/null
-	date > $@
-
-else
-
-# Otherwise, if not in BUILD_FOR_WEBSITE mode, use the project info.
-CLANG_LEVEL := ../..
-include $(CLANG_LEVEL)/Makefile
-
-CLANG_VERSION := $(word 3,$(shell grep "CLANG_VERSION " \
-	$(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include/clang/Basic/Version.inc))
-
-SRC_DOC_DIR=$(PROJ_SRC_DIR)/
-DST_HTML_DIR=$(PROJ_OBJ_DIR)/
-DST_MAN_DIR=$(PROJ_OBJ_DIR)/
-DST_PS_DIR=$(PROJ_OBJ_DIR)/
-
-endif
-
-
-POD  := $(wildcard $(SRC_DOC_DIR)*.pod)
-HTML := $(patsubst $(SRC_DOC_DIR)%.pod, $(DST_HTML_DIR)%.html, $(POD))
-MAN  := $(patsubst $(SRC_DOC_DIR)%.pod, $(DST_MAN_DIR)%.1, $(POD))
-PS   := $(patsubst $(SRC_DOC_DIR)%.pod, $(DST_PS_DIR)%.ps, $(POD))
-
-ifdef ONLY_MAN_DOCS
-INSTALL_TARGETS := install-man
-else
-INSTALL_TARGETS := install-html install-man install-ps
-endif
-
-.SUFFIXES:
-.SUFFIXES: .html .pod .1 .ps
-
-$(DST_HTML_DIR)%.html: %.pod $(DST_HTML_DIR)/.dir
-	pod2html --css=manpage.css --htmlroot=. \
-	  --podpath=. --infile=$< --outfile=$@ --title=$*
-
-$(DST_MAN_DIR)%.1: %.pod $(DST_MAN_DIR)/.dir
-	pod2man --release "clang $(CLANG_VERSION)" --center="Clang Tools Documentation" $< $@
-
-$(DST_PS_DIR)%.ps: $(DST_MAN_DIR)%.1 $(DST_PS_DIR)/.dir
-	groff -Tps -man $< > $@
-
-
-html: $(HTML)
-man: $(MAN)
-ps: $(PS)
-
-EXTRA_DIST := $(POD)
-
-clean-local::
-	$(Verb) $(RM) -f pod2htm*.*~~ $(HTML) $(MAN) $(PS)
-
-HTML_DIR := $(DESTDIR)$(PROJ_docsdir)/html/clang
-MAN_DIR  := $(DESTDIR)$(PROJ_mandir)/man1
-PS_DIR   := $(DESTDIR)$(PROJ_docsdir)/ps
-
-install-html:: $(HTML)
-	$(Echo) Installing HTML Clang Tools Documentation
-	$(Verb) $(MKDIR) $(HTML_DIR)
-	$(Verb) $(DataInstall) $(HTML) $(HTML_DIR)
-	$(Verb) $(DataInstall) $(PROJ_SRC_DIR)/manpage.css $(HTML_DIR)
-
-install-man:: $(MAN)
-	$(Echo) Installing MAN Clang Tools Documentation
-	$(Verb) $(MKDIR) $(MAN_DIR)
-	$(Verb) $(DataInstall) $(MAN) $(MAN_DIR)
-
-install-ps:: $(PS)
-	$(Echo) Installing PS Clang Tools Documentation
-	$(Verb) $(MKDIR) $(PS_DIR)
-	$(Verb) $(DataInstall) $(PS) $(PS_DIR)
-
-install-local:: $(INSTALL_TARGETS)
-
-uninstall-local::
-	$(Echo) Uninstalling Clang Tools Documentation
-	$(Verb) $(RM) -rf $(HTML_DIR) $(MAN_DIR) $(PS_DIR)
-
-printvars::
-	$(Echo) "POD            : " '$(POD)'
-	$(Echo) "HTML           : " '$(HTML)'
diff --git a/clang/docs/tools/clang.pod b/clang/docs/tools/clang.pod
deleted file mode 100644
index 153f97b2caa..00000000000
--- a/clang/docs/tools/clang.pod
+++ /dev/null
@@ -1,614 +0,0 @@
-=pod
-
-=head1 NAME
-
-clang - the Clang C, C++, and Objective-C compiler
-
-=head1 SYNOPSIS
-
-B<clang> [B<-c>|B<-S>|B<-E>] B<-std=>I<standard> B<-g>
-  [B<-O0>|B<-O1>|B<-O2>|B<-O3>|B<-Ofast>|B<-Os>|B<-Oz>|B<-O>|B<-O4>]
-  B<-W>I<warnings...> B<-pedantic>
-  B<-I>I<dir...> B<-L>I<dir...>
-  B<-D>I<macro[=defn]>
-  B<-f>I<feature-option...>
-  B<-m>I<machine-option...>
-  B<-o> I<output-file>
-  B<-stdlib=>I<library> 
-  I<input-filenames>
-
-=head1 DESCRIPTION
-
-B<clang> is a C, C++, and Objective-C compiler which encompasses preprocessing,
-parsing, optimization, code generation, assembly, and linking.  Depending on
-which high-level mode setting is passed, Clang will stop before doing a full
-link.  While Clang is highly integrated, it is important to understand the
-stages of compilation, to understand how to invoke it.  These stages are:
-
-=over
-
-=item B<Driver>
-
-The B<clang> executable is actually a small driver which controls the overall
-execution of other tools such as the compiler, assembler and linker.  Typically
-you do not need to interact with the driver, but you transparently use it to run
-the other tools.
-
-=item B<Preprocessing>
-
-This stage handles tokenization of the input source file, macro expansion,
-#include expansion and handling of other preprocessor directives.  The output of
-this stage is typically called a ".i" (for C), ".ii" (for C++), ".mi" (for 
-Objective-C), or ".mii" (for Objective-C++) file.
-
-=item B<Parsing and Semantic Analysis>
-
-This stage parses the input file, translating preprocessor tokens into a parse
-tree.  Once in the form of a parse tree, it applies semantic analysis to compute
-types for expressions as well and determine whether the code is well formed. This
-stage is responsible for generating most of the compiler warnings as well as
-parse errors.  The output of this stage is an "Abstract Syntax Tree" (AST).
-
-=item B<Code Generation and Optimization>
-
-This stage translates an AST into low-level intermediate code (known as "LLVM
-IR") and ultimately to machine code.  This phase is responsible for optimizing
-the generated code and handling target-specific code generation.  The output of
-this stage is typically called a ".s" file or "assembly" file.
-
-Clang also supports the use of an integrated assembler, in which the code
-generator produces object files directly. This avoids the overhead of generating
-the ".s" file and of calling the target assembler.
-
-=item B<Assembler>
-
-This stage runs the target assembler to translate the output of the compiler
-into a target object file.  The output of this stage is typically called a ".o"
-file or "object" file.
-
-=item B<Linker>
-
-This stage runs the target linker to merge multiple object files into an
-executable or dynamic library.  The output of this stage is typically called an
-"a.out", ".dylib" or ".so" file.
-
-=back
-
-The Clang compiler supports a large number of options to control each of these
-stages.  In addition to compilation of code, Clang also supports other tools:
-
-B<Clang Static Analyzer>
-
-The Clang Static Analyzer is a tool that scans source code to try to find bugs
-through code analysis.  This tool uses many parts of Clang and is built into the
-same driver.  Please see L<http://clang-analyzer.llvm.org> for more details
-on how to use the static analyzer.
-
-
-=head1 OPTIONS
-
-=head2 Stage Selection Options
-
-=over
-
-=item B<-E>
-
-Run the preprocessor stage.
-
-=item B<-fsyntax-only>
-
-Run the preprocessor, parser and type checking stages.
-
-=item B<-S>
-
-Run the previous stages as well as LLVM generation and optimization stages and
-target-specific code generation, producing an assembly file.
-
-=item B<-c>
-
-Run all of the above, plus the assembler, generating a target ".o" object file.
-
-=item B<no stage selection option>
-
-If no stage selection option is specified, all stages above are run, and the
-linker is run to combine the results into an executable or shared library.
-
-=back
-
-
-
-=head2 Language Selection and Mode Options
-
-=over
-
-=item B<-x> I<language>
-
-Treat subsequent input files as having type I<language>.
-
-=item B<-std>=I<language>
-
-Specify the language standard to compile for.
-
-=item B<-stdlib>=I<library>
-
-Specify the C++ standard library to use; supported options are libstdc++ and
-libc++.
-
-=item B<-ansi>
-
-Same as B<-std=c89>.
-
-=item B<-ObjC++>
-
-Treat source input files as Objective-C++ inputs.
-
-=item B<-ObjC>
-
-Treat source input files as Objective-C inputs.
-
-=item B<-trigraphs>
-
-Enable trigraphs.
-
-=item B<-ffreestanding>
-
-Indicate that the file should be compiled for a freestanding, not a hosted,
-environment.
-
-=item B<-fno-builtin>
-
-Disable special handling and optimizations of builtin functions like strlen and
-malloc.
-
-=item B<-fmath-errno>
-
-Indicate that math functions should be treated as updating errno.
-
-=item B<-fpascal-strings>
-
-Enable support for Pascal-style strings with "\pfoo".
-
-=item B<-fms-extensions>
-
-Enable support for Microsoft extensions.
-
-=item B<-fmsc-version=>
-
-Set _MSC_VER. Defaults to 1300 on Windows. Not set otherwise.
-
-=item B<-fborland-extensions>
-
-Enable support for Borland extensions.
-
-=item B<-fwritable-strings>
-
-Make all string literals default to writable.  This disables uniquing of
-strings and other optimizations.
-
-=item B<-flax-vector-conversions>
-
-Allow loose type checking rules for implicit vector conversions.
-
-=item B<-fblocks>
-
-Enable the "Blocks" language feature.
-
-=item B<-fobjc-gc-only>
-
-Indicate that Objective-C code should be compiled in GC-only mode, which only
-works when Objective-C Garbage Collection is enabled.
-
-=item B<-fobjc-gc>
-
-Indicate that Objective-C code should be compiled in hybrid-GC mode, which works
-with both GC and non-GC mode.
-
-=item B<-fobjc-abi-version>=I<version>
-
-Select the Objective-C ABI version to use. Available versions are 1 (legacy
-"fragile" ABI), 2 (non-fragile ABI 1), and 3 (non-fragile ABI 2).
-
-=item B<-fobjc-nonfragile-abi-version>=I<version>
-
-Select the Objective-C non-fragile ABI version to use by default. This will only
-be used as the Objective-C ABI when the non-fragile ABI is enabled (either via
--fobjc-nonfragile-abi, or because it is the platform default).
-
-=item B<-fobjc-nonfragile-abi>
-
-Enable use of the Objective-C non-fragile ABI. On platforms for which this is
-the default ABI, it can be disabled with B<-fno-objc-nonfragile-abi>.
-
-=back
-
-
-
-=head2 Target Selection Options
-
-Clang fully supports cross compilation as an inherent part of its design.
-Depending on how your version of Clang is configured, it may have support for
-a number of cross compilers, or may only support a native target.
-
-=over
-
-=item B<-arch> I<architecture>
-
-Specify the architecture to build for.
-
-=item B<-mmacosx-version-min>=I<version>
-
-When building for Mac OS X, specify the minimum version supported by your
-application.
-
-=item B<-miphoneos-version-min>
-
-When building for iPhone OS, specify the minimum version supported by your
-application.
-
-
-=item B<-march>=I<cpu>
-
-Specify that Clang should generate code for a specific processor family member
-and later.  For example, if you specify -march=i486, the compiler is allowed to
-generate instructions that are valid on i486 and later processors, but which
-may not exist on earlier ones.
-
-=back
-
-
-=head2 Code Generation Options
-
-=over
-
-=item B<-O0> B<-O1> B<-O2> B<-O3> B<-Ofast> B<-Os> B<-Oz> B<-O> B<-O4>
-
-Specify which optimization level to use:
-
-=over
-
-=item B<-O0>
-
-Means "no optimization": this level compiles the fastest and
-generates the most debuggable code.
-
-=item B<-O1>
-
-Somewhere between B<-O0> and B<-O2>.
-
-=item B<-O2>
-
-Moderate level of optimization which enables most optimizations.
-
-=item B<-O3>
-
-Like B<-O2>, except that it enables optimizations that take longer to perform
-or that may generate larger code (in an attempt to make the program run faster).
-
-=item B<-Ofast>
-
-Enables all the optimizations from B<-O3> along with other aggressive
-optimizations that may violate strict compliance with language standards.
-
-=item B<-Os>
-
-Like B<-O2> with extra optimizations to reduce code size.
-
-=item B<-Oz>
-
-Like B<-Os> (and thus B<-O2>), but reduces code size further.
-
-=item B<-O>
-
-Equivalent to B<-O2>.
-
-=item B<-O4> and higher
-
-Currently equivalent to B<-O3>
-
-=back
-
-=item B<-g>
-
-Generate debug information.  Note that Clang debug information works best at
-B<-O0>.
-
-=item B<-fstandalone-debug> B<-fno-standalone-debug>
-
-Clang supports a number of optimizations to reduce the size of debug
-information in the binary. They work based on the assumption that the
-debug type information can be spread out over multiple compilation
-units.  For instance, Clang will not emit type definitions for types
-that are not needed by a module and could be replaced with a forward
-declaration.  Further, Clang will only emit type info for a dynamic
-C++ class in the module that contains the vtable for the class.
-
-The B<-fstandalone-debug> option turns off these optimizations.  This
-is useful when working with 3rd-party libraries that don't come with
-debug information.  This is the default on Darwin.  Note that Clang
-will never emit type information for types that are not referenced at
-all by the program.
-
-=item B<-fexceptions>
-
-Enable generation of unwind information. This allows exceptions to be thrown
-through Clang compiled stack frames.  This is on by default in x86-64.
-
-=item B<-ftrapv>
-
-Generate code to catch integer overflow errors.  Signed integer overflow is
-undefined in C. With this flag, extra code is generated to detect this and abort
-when it happens.
-
-
-=item B<-fvisibility>
-
-This flag sets the default visibility level.
-
-=item B<-fcommon>
-
-This flag specifies that variables without initializers get common linkage.  It
-can be disabled with B<-fno-common>.
-
-=item B<-ftls-model>
-
-Set the default thread-local storage (TLS) model to use for thread-local
-variables. Valid values are: "global-dynamic", "local-dynamic", "initial-exec"
-and "local-exec". The default is "global-dynamic". The default model can be
-overridden with the tls_model attribute. The compiler will try to choose a more
-efficient model if possible.
-
-=item B<-flto> B<-emit-llvm>
-
-Generate output files in LLVM formats, suitable for link time optimization. When
-used with B<-S> this generates LLVM intermediate language assembly files,
-otherwise this generates LLVM bitcode format object files (which may be passed
-to the linker depending on the stage selection options).
-
-=cut
-
-##=item B<-fnext-runtime> B<-fobjc-nonfragile-abi> B<-fgnu-runtime>
-##These options specify which Objective-C runtime the code generator should
-##target.  FIXME: we don't want people poking these generally.
-
-=pod
-
-=back
-
-
-=head2 Driver Options
-
-=over
-
-=item B<-###>
-
-Print (but do not run) the commands to run for this compilation.
-
-=item B<--help>
-
-Display available options.
-
-=item B<-Qunused-arguments>
-
-Do not emit any warnings for unused driver arguments.
-
-=item B<-Wa,>I<args>
-
-Pass the comma separated arguments in I<args> to the assembler.
-
-=item B<-Wl,>I<args>
-
-Pass the comma separated arguments in I<args> to the linker.
-
-=item B<-Wp,>I<args>
-
-Pass the comma separated arguments in I<args> to the preprocessor.
-
-=item B<-Xanalyzer> I<arg>
-
-Pass I<arg> to the static analyzer.
-
-=item B<-Xassembler> I<arg>
-
-Pass I<arg> to the assembler.
-
-=item B<-Xlinker> I<arg>
-
-Pass I<arg> to the linker.
-
-=item B<-Xpreprocessor> I<arg>
-
-Pass I<arg> to the preprocessor.
-
-=item B<-o> I<file>
-
-Write output to I<file>.
-
-=item B<-print-file-name>=I<file>
-
-Print the full library path of I<file>.
-
-=item B<-print-libgcc-file-name>
-
-Print the library path for "libgcc.a".
-
-=item B<-print-prog-name>=I<name>
-
-Print the full program path of I<name>.
-
-=item B<-print-search-dirs>
-
-Print the paths used for finding libraries and programs.
-
-=item B<-save-temps>
-
-Save intermediate compilation results.
-
-=item B<-integrated-as> B<-no-integrated-as>
-
-Used to enable and disable, respectively, the use of the integrated
-assembler. Whether the integrated assembler is on by default is target
-dependent.
-
-=item B<-time>
-
-Time individual commands.
-
-=item B<-ftime-report>
-
-Print timing summary of each stage of compilation.
-
-=item B<-v>
-
-Show commands to run and use verbose output.
-
-=back
-
-
-=head2 Diagnostics Options
-
-=over
-
-=item B<-fshow-column>
-B<-fshow-source-location>
-B<-fcaret-diagnostics>
-B<-fdiagnostics-fixit-info>
-B<-fdiagnostics-parseable-fixits>
-B<-fdiagnostics-print-source-range-info>
-B<-fprint-source-range-info>
-B<-fdiagnostics-show-option>
-B<-fmessage-length>
-
-These options control how Clang prints out information about diagnostics (errors
-and warnings).  Please see the Clang User's Manual for more information.
-
-=back
-
-
-=head2 Preprocessor Options
-
-=over
-
-=item B<-D>I<macroname=value>
-
-Adds an implicit #define into the predefines buffer which is read before the
-source file is preprocessed.
-
-=item B<-U>I<macroname>
-
-Adds an implicit #undef into the predefines buffer which is read before the
-source file is preprocessed.
-
-=item B<-include> I<filename>
-
-Adds an implicit #include into the predefines buffer which is read before the
-source file is preprocessed.
-
-=item B<-I>I<directory>
-
-Add the specified directory to the search path for include files.
-
-=item B<-F>I<directory>
-
-Add the specified directory to the search path for framework include files.
-
-=item B<-nostdinc>
-
-Do not search the standard system directories or compiler builtin directories
-for include files.
-
-=item B<-nostdlibinc>
-
-Do not search the standard system directories for include files, but do search
-compiler builtin include directories.
-
-=item B<-nobuiltininc>
-
-Do not search clang's builtin directory for include files.
-
-=cut
-
-## TODO, but do we really want people using this stuff?
-#=item B<-idirafter>I<directory>
-#=item B<-iquote>I<directory>
-#=item B<-isystem>I<directory>
-#=item B<-iprefix>I<directory>
-#=item B<-iwithprefix>I<directory>
-#=item B<-iwithprefixbefore>I<directory>
-#=item B<-isysroot>
-
-=pod
-
-
-=back
-
-
-
-=cut
-
-### TODO someday.
-#=head2 Warning Control Options
-#=over
-#=back
-#=head2 Code Generation and Optimization Options
-#=over
-#=back
-#=head2 Assembler Options
-#=over
-#=back
-#=head2 Linker Options
-#=over
-#=back
-#=head2 Static Analyzer Options
-#=over
-#=back
-
-=pod
-
-
-=head1 ENVIRONMENT
-
-=over
-
-=item B<TMPDIR>, B<TEMP>, B<TMP>
-
-These environment variables are checked, in order, for the location to
-write temporary files used during the compilation process.
-
-=item B<CPATH>
-
-If this environment variable is present, it is treated as a delimited
-list of paths to be added to the default system include path list. The
-delimiter is the platform dependent delimiter, as used in the I<PATH>
-environment variable.
-
-Empty components in the environment variable are ignored.
-
-=item B<C_INCLUDE_PATH>, B<OBJC_INCLUDE_PATH>, B<CPLUS_INCLUDE_PATH>,
-B<OBJCPLUS_INCLUDE_PATH>
-
-These environment variables specify additional paths, as for CPATH,
-which are only used when processing the appropriate language.
-
-=item B<MACOSX_DEPLOYMENT_TARGET>
-
-If -mmacosx-version-min is unspecified, the default deployment target
-is read from this environment variable.  This option only affects Darwin
-targets.
-
-=back
-
-=head1 BUGS
-
-To report bugs, please visit L<http://llvm.org/bugs/>.  Most bug reports should
-include preprocessed source files (use the B<-E> option) and the full output of 
-the compiler, along with information to reproduce.
-
-=head1 SEE ALSO
-
- as(1), ld(1)
-
-=head1 AUTHOR
-
-Maintained by the Clang / LLVM Team (L<http://clang.llvm.org>).
-
-=cut
diff --git a/clang/docs/tools/manpage.css b/clang/docs/tools/manpage.css
deleted file mode 100644
index c922564dc3c..00000000000
--- a/clang/docs/tools/manpage.css
+++ /dev/null
@@ -1,256 +0,0 @@
-/* Based on http://www.perldoc.com/css/perldoc.css */
-
-@import url("../llvm.css");
-
-body { font-family: Arial,Helvetica; }
-
-blockquote { margin: 10pt;  }
-
-h1, a { color: #336699; }
-
-
-/*** Top menu style ****/
-.mmenuon { 
- font-family: Arial,Helvetica; font-weight: bold; text-decoration: none;
- color: #ff6600; font-size: 10pt;
-}
-.mmenuoff { 
- font-family: Arial,Helvetica; font-weight: bold; text-decoration: none;
- color: #ffffff; font-size: 10pt;
-}	  
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