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(This file was generated by makeinfo and splitinfo.gawk.)
(Released under the old-style GNU documentation license;
see sources or other output files for full text.)
3 Prerequisites
***************
Overall, building the TeX Live programs, when using all libraries from
the TL source tree, requires C and C++11 compilers and GNU 'make'. If
'make' from your 'PATH' is not GNU make, you can set the 'MAKE'
environment variable to whatever is necessary.
GNU 'make' is required only because of some third-party libraries,
notably FreeType; all the TL-maintained directories (and
Automake/Autoconf output in general) work with any reasonable 'make'.
A C++11 compiler is similarly required because of the third-party
library ICU; the program 'dvisvgm' also requires C++11. It is possible
to build everything else with older compilers, but you have to remove
the C++11-dependent sources. *Note Build one package::.
A few programs in the tree have additional requirements:
'web2c'
requires 'perl' for some tests run by 'make check'.
'xdvik'
'xpdfopen'
require X11 headers and libraries, typically in "development"
packages that are not installed by default.
'xetex'
requires 'fontconfig' (again both headers and library), or, for
MacOSX only, the 'ApplicationServices' and 'Cocoa' frameworks.
'xindy'
requires GNU 'clisp', 'libsigsegv', and 'libiconv'; additionally,
to build the rules and/or documentation: 'perl', 'latex',
'pdflatex'.
Lacking the required tools, building these programs must avoided, e.g.,
'configure --without-x --disable-xetex --disable-xindy'
Modifying source files induces more requirements, as one might
expect:
* Modification of any '.y' or '.l' source files requires 'bison' or
'flex' to update the corresponding C sources.
* Modification of the sources for '.info' files requires 'makeinfo'.
* Modification of any part of the build system (M4 macros,
'configure.ac', 'Makefile.am', or their fragments) requires GNU M4,
GNU Autoconf, GNU Automake, and GNU Libtool to update the generated
files. Furthermore, to reliably reproduce the build files, the
original GNU releases of these tools must be used, not any distro
packaging of them. *Note Build system tools::, for more
discussion.
If you haven't modified any source files, and infrastructure tools
such as 'autoconf' or 'makeinfo' are still being run, check your
timestamps--notably, 'use-commit-times' must be set to 'yes' in your
Subversion configuration (*note Build system tools::). Barring buggy
commits, no infrastructure tools are needed to do a normal build.
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