95 lines
3.5 KiB
Plaintext
95 lines
3.5 KiB
Plaintext
file: isolib/README
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New users may wish to point their web browsers to the file index.html
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in the 'docs' subdirectory. It contains brief building instructions
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and notes on how to configure the library in interesting ways.
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Instructions for configuring and building this snapshot appear
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in install.html.
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This directory contains the files needed to create [a still broken
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subset of] an ISO Standard C++ Library.
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It has subdirectories:
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bits
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Files included by standard headers and by other files in
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the bits directory. Includes a set of files bits/std_xxxx.h
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that implement the standard headers <xxxx>.
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std
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Files meant to be found by #include <name> directives in
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standard-conforming user programs. These headers are not
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referred to by other headers, because such dependencies
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confuse Make (leading it to delete them, all too often).
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Installations may substitute symbolic links in place of
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these files.
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ext
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Headers that define extensions to the standard library. No
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standard header refers to any of them.
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backward
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Headers provided for backward compatibility, such as <iostream.h>.
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They are not used in this library.
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src
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Files that are used in constructing the library, but are not
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installed.
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testsuites/17_* to 27_*
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Test programs are here, and may be used to begin to exercise the
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library. Support for "make check" and "make check-install" is
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complete, and runs through all the subdirectories here when this
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command is issued from the build directory. Please note that
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"make check" calls the script mkcheck, which requires bash, and which
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may need the paths to bash adjusted to work properly, as /bin/bash is
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assumed.
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shadow
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Headers intended to shadow standard C headers provided by an
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underlying OS or C library, and other headers depended on directly
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by C++ headers (e.g. unistd.h). These are meant to wrap the names
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defined there into the _CSwamp namespace.
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[NB: this is still experimental, and is not currently used.]
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cshadow
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The contents of this directory are constructed by scripts which
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examine the underlying C headers to discover other headers they
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depend on. These headers are wrappers for them.
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[NB: this is still experimental, and is not currently used.]
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Other subdirectories contain variant versions of certain files
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that are meant to be copied or linked by the configure script.
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Currently these are:
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amm1 generic glibc math
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Files needed only to construct the library, but not installed,
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are in src/. Files to be copied as part of an installation are
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all found in the subdirectories mentioned above. (A configure
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script may link files from another directory into one of these.)
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In a normal installation the bits/ directory is copied
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under the std/ directory, and arranged to be searched only
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when an include directive specifies a filename of "bits/..."
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or <bits/...>. When building the library, we use
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-Istd -I. -Iconfig/* -Iconfig/cpu/*
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to get the same effect.
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Note that glibc also has a bits/ subdirectory. We will either
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need to be careful not to collide with names in its bits/
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directory; or rename bits to (e.g.) cppbits/.
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To install libstdc++ you need GNU make. The makefiles do not work with
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any other make.
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In files throughout the system, lines marked with an "XXX" indicate
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a bug or incompletely-implemented feature. Lines marked "XXX MT"
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indicate a place that may require attention for multi-thread safety.
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(Warning: places that need an atomic read are not so marked yet.)
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