1 @c Copyright (C) 2001, 2002, 2003, 2004, 2006, 2008, 2010
2 @c Free Software Foundation, Inc.
3 @c This is part of the GCC manual.
4 @c For copying conditions, see the file gcc.texi.
7 @subsection Makefile Targets
8 @cindex makefile targets
9 @cindex targets, makefile
11 These targets are available from the @samp{gcc} directory:
15 This is the default target. Depending on what your build/host/target
16 configuration is, it coordinates all the things that need to be built.
19 Produce info-formatted documentation and man pages. Essentially it
20 calls @samp{make man} and @samp{make info}.
23 Produce DVI-formatted documentation.
26 Produce PDF-formatted documentation.
29 Produce HTML-formatted documentation.
35 Generate info-formatted pages.
38 Delete the files made while building the compiler.
41 That, and all the other files built by @samp{make all}.
44 That, and all the files created by @command{configure}.
46 @item maintainer-clean
47 Distclean plus any file that can be generated from other files. Note
48 that additional tools may be required beyond what is normally needed to
52 Generates files in the source directory that are not version-controlled but
53 should go into a release tarball.
57 Copies the info-formatted and manpage documentation into the source
58 directory usually for the purpose of generating a release tarball.
64 Deletes installed files, though this is not supported.
67 Run the testsuite. This creates a @file{testsuite} subdirectory that
68 has various @file{.sum} and @file{.log} files containing the results of
69 the testing. You can run subsets with, for example, @samp{make check-gcc}.
70 You can specify specific tests by setting @env{RUNTESTFLAGS} to be the name
71 of the @file{.exp} file, optionally followed by (for some tests) an equals
72 and a file wildcard, like:
75 make check-gcc RUNTESTFLAGS="execute.exp=19980413-*"
78 Note that running the testsuite may require additional tools be
79 installed, such as Tcl or DejaGnu.
82 The toplevel tree from which you start GCC compilation is not
83 the GCC directory, but rather a complex Makefile that coordinates
84 the various steps of the build, including bootstrapping the compiler
85 and using the new compiler to build target libraries.
87 When GCC is configured for a native configuration, the default action
88 for @command{make} is to do a full three-stage bootstrap. This means
89 that GCC is built three times---once with the native compiler, once with
90 the native-built compiler it just built, and once with the compiler it
91 built the second time. In theory, the last two should produce the same
92 results, which @samp{make compare} can check. Each stage is configured
93 separately and compiled into a separate directory, to minimize problems
94 due to ABI incompatibilities between the native compiler and GCC.
96 If you do a change, rebuilding will also start from the first stage
97 and ``bubble'' up the change through the three stages. Each stage
98 is taken from its build directory (if it had been built previously),
99 rebuilt, and copied to its subdirectory. This will allow you to, for
100 example, continue a bootstrap after fixing a bug which causes the
101 stage2 build to crash. It does not provide as good coverage of the
102 compiler as bootstrapping from scratch, but it ensures that the new
103 code is syntactically correct (e.g., that you did not use GCC extensions
104 by mistake), and avoids spurious bootstrap comparison
105 failures@footnote{Except if the compiler was buggy and miscompiled
106 some of the files that were not modified. In this case, it's best
107 to use @command{make restrap}.}.
109 Other targets available from the top level include:
113 Like @code{bootstrap}, except that the various stages are removed once
114 they're no longer needed. This saves disk space.
117 @itemx bootstrap2-lean
118 Performs only the first two stages of bootstrap. Unlike a three-stage
119 bootstrap, this does not perform a comparison to test that the compiler
120 is running properly. Note that the disk space required by a ``lean''
121 bootstrap is approximately independent of the number of stages.
123 @item stage@var{N}-bubble (@var{N} = 1@dots{}4, profile, feedback)
124 Rebuild all the stages up to @var{N}, with the appropriate flags,
125 ``bubbling'' the changes as described above.
127 @item all-stage@var{N} (@var{N} = 1@dots{}4, profile, feedback)
128 Assuming that stage @var{N} has already been built, rebuild it with the
129 appropriate flags. This is rarely needed.
132 Remove everything (@samp{make clean}) and rebuilds (@samp{make bootstrap}).
135 Compares the results of stages 2 and 3. This ensures that the compiler
136 is running properly, since it should produce the same object files
137 regardless of how it itself was compiled.
139 @item profiledbootstrap
140 Builds a compiler with profiling feedback information. In this case,
141 the second and third stages are named @samp{profile} and @samp{feedback},
142 respectively. For more information, see
143 @ref{Building,,Building with profile feedback,gccinstall,Installing GCC}.
146 Restart a bootstrap, so that everything that was not built with
147 the system compiler is rebuilt.
149 @item stage@var{N}-start (@var{N} = 1@dots{}4, profile, feedback)
150 For each package that is bootstrapped, rename directories so that,
151 for example, @file{gcc} points to the stage@var{N} GCC, compiled
152 with the stage@var{N-1} GCC@footnote{Customarily, the system compiler
153 is also termed the @file{stage0} GCC.}.
155 You will invoke this target if you need to test or debug the
156 stage@var{N} GCC@. If you only need to execute GCC (but you need
157 not run @samp{make} either to rebuild it or to run test suites),
158 you should be able to work directly in the @file{stage@var{N}-gcc}
159 directory. This makes it easier to debug multiple stages in
163 For each package that is bootstrapped, relocate its build directory
164 to indicate its stage. For example, if the @file{gcc} directory
165 points to the stage2 GCC, after invoking this target it will be
166 renamed to @file{stage2-gcc}.
170 If you wish to use non-default GCC flags when compiling the stage2 and
171 stage3 compilers, set @code{BOOT_CFLAGS} on the command line when doing
174 Usually, the first stage only builds the languages that the compiler
175 is written in: typically, C and maybe Ada. If you are debugging a
176 miscompilation of a different stage2 front-end (for example, of the
177 Fortran front-end), you may want to have front-ends for other languages
178 in the first stage as well. To do so, set @code{STAGE1_LANGUAGES}
179 on the command line when doing @samp{make}.
181 For example, in the aforementioned scenario of debugging a Fortran
182 front-end miscompilation caused by the stage1 compiler, you may need a
186 make stage2-bubble STAGE1_LANGUAGES=c,fortran
189 Alternatively, you can use per-language targets to build and test
190 languages that are not enabled by default in stage1. For example,
191 @command{make f951} will build a Fortran compiler even in the stage1