mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-25 07:28:20 +00:00
88b0bb4db9
C23's <stdbit.h> in the long run should be better supported than Gnulib's count-one-bits.h and similar headers, so switch to the C23 primitives, with a Gnulib fallback for platforms lacking C23. * admin/merge-gnulib (GNULIB_MODULES): Remove count-leading-zeros, count-one-bits, count-trailing-zeros. Add stdc_bit_width, stdc_count_ones, stdc_trailing_zeros. * lib/count-leading-zeros.c, lib/count-leading-zeros.h: * lib/count-one-bits.c, lib/count-one-bits.h: * lib/count-trailing-zeros.c, lib/count-trailing-zeros.h: Remove. * lib/stdbit.c, lib/stdbit.in.h, lib/stdc_bit_width.c: * lib/stdc_count_ones.c, lib/stdc_leading_zeros.c: * lib/stdc_trailing_zeros.c, m4/stdbit_h.m4: New files, copied from Gnulib. * lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate. * src/data.c: Do not include count-one-bits.h, count-trailing-zeros.h. Instead, rely on lisp.h including stdbit.h. (Flogcount, Fbool_vector_count_population) (Fbool_vector_count_consecutive): Use stdbit.h macros instead of count-one-bits.h and count-trailing-zeros.h macros. (shift_right_ull, count_one_bits_word, pre_value) (count_trailing_zero_bits): Remove; no longer needed. * src/lisp.h: Include stdbit.h instead of count-leading-zeros.h. (elogb): Use stdbit.h macro instead of count-leading-zeros.h macro.
117 lines
4.6 KiB
Plaintext
117 lines
4.6 KiB
Plaintext
Building and Installing Emacs from the Repository
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The Emacs repository is hosted on Savannah. The following Git command
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will clone the repository to the 'emacs' subdirectory of the current
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directory on your local machine:
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git clone https://git.savannah.gnu.org/git/emacs.git
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To build the repository code, simply run 'make' in the 'emacs'
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directory. This should work if your files are freshly checked out
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from the repository, and if you have the proper tools installed; the
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default configuration options will be used. Other configuration
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options can be specified by setting a 'configure' variable, for
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example:
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$ make configure="--prefix=/opt/emacs CFLAGS='-O0 -g3'"
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If the above doesn't work, or if you have special build requirements,
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the following information may be helpful.
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Building Emacs from the source-code repository requires some tools
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that are not needed when building from a release. You will need:
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autoconf - at least the version specified near the start of
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configure.ac (in the AC_PREREQ command).
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git - at least Git 1.7.1. If your repository was created by an older
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Git version, you may need to reclone it.
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makeinfo - not strictly necessary, but highly recommended, so that
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you can build the manuals. GNU Texinfo 4.13 or later should work.
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To use the autotools, run the following shell command to generate the
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'configure' script and some related files, and to set up your git
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configuration:
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$ ./autogen.sh
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You can then configure your build as follows:
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$ ./configure
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The 'configure' script has many options; run './configure --help' to
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see them. For example, if you want later builds to go faster, albeit
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sometimes doing the wrong thing if you update the build procedure, you
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can invoke './configure -C'. After configuring, build Emacs as follows:
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$ make
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You can also type 'make check' to test and 'make install' to install
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Emacs.
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Occasionally the file 'lisp/loaddefs.el' (and similar automatically
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generated files, such as 'esh-groups.el', and '*-loaddefs.el' in some
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subdirectories of 'lisp/', e.g., 'mh-e/' and 'calendar/') will need to be
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updated to reflect new autoloaded functions. If you see errors (rather
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than warnings) about undefined lisp functions during compilation, that
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may be the reason. Finally, sometimes there can be build failures
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related to '*loaddefs.el' (e.g., "required feature ‘esh-groups’ was not
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provided"). In that case, follow the instructions below.
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To update loaddefs.el (and similar files), do:
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$ cd lisp
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$ make autoloads
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If either of the above partial procedures fails, try 'make bootstrap'.
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If CPU time is not an issue, 'make bootstrap' is a more thorough way
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to rebuild, avoiding spurious problems. 'make bootstrap' rebuilds
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Emacs with the same configuration options as the previous build; it
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can also be used to rebuild Emacs with other configuration options by
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setting a 'configure' variable, for example:
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$ make bootstrap configure="CFLAGS='-O0 -g3'"
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To rebuild Emacs with the default configuration options, you can use:
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$ make bootstrap configure=default
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Occasionally, there are changes that 'make bootstrap' won't be able to
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handle. The most thorough cleaning can be achieved by 'git clean -fdx'
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which will leave you with only files from the git repository. Here
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are some faster methods for a couple of particular error cases:
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/usr/bin/m4:aclocal.m4:9: cannot open `m4/stdbit_h.m4': No such file or directory
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This can be fixed with 'rm aclocal.m4'.
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make: *** No rule to make target 'lib/Makefile.am', needed by 'lib/Makefile.in'
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This can be fixed with 'rm lib/Makefile Makefile'.
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Because the repository version of Emacs is a work in progress, it will
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sometimes fail to build. Please wait a day or so (and check the
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archives of the emacs-buildstatus, emacs-devel, and bug-gnu-emacs
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mailing lists) before reporting such problems. In most cases, the
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problem is known about and is just waiting for someone to fix it.
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This is especially true for Lisp compilation errors, which are almost
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never platform-specific.
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Copyright (C) 2002-2024 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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