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47 lines
2.2 KiB
Plaintext
47 lines
2.2 KiB
Plaintext
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970811
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This directory contains the f2c library packaged for use with g77 to configure
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and build automatically (in principle!) as part of the top-level configure and
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make steps. This depends on the makefile and configure fragments in ../f.
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Some small changes have been made to the f2c distributions of lib[FI]77 which
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come from <ftp:bell-labs.com/netlib/f2c/> and are maintained (excellently) by
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David M. Gay <dmg@bell-labs.com>. See the Notice files for copyright
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information. I'll try to get the changes rolled into the f2c distribution.
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Files that come directly from netlib are either maintained in the
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gcc/f/runtime/ directory under their original names or, if they
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are not pertinent for g77's version of libf2c, under their original
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names with `.netlib' appended. For example, gcc/f/runtime/permissions.netlib
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is a copy of f2c's top-level`permissions' file in the netlib distribution.
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In this case, it applies only to the relevant portions of the libF77/ and
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libI77/ directories; it does not apply to the libU77/ directory, which is
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distributed under different licensing arrangements. Similarly,
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the `makefile.netlib' files in libF77/ and libI77/ are copies of
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the respective `makefile' files in the netlib distribution, but
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are not used when building g77's version of libf2c.
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The `README.netlib' files in libF77/ and libI77/ thus might be
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interesting, but should not be taken as guidelines for how to
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configure and build libf2c in g77's distribution.
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The packaging for auto-configuration was done by Dave Love <d.love@dl.ac.uk>.
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Minor changes have been made by James Craig Burley <burley@gnu.ai.mit.edu>,
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who probably broke things Dave had working. :-)
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Among the user-visible changes (choices) g77 makes in its
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version of libf2c:
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- f2c.h configured to default to padding unformatted direct reads
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(#define Pad_UDread), because that's the behavior most users
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expect.
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- f2c.h configured to default to outputting leading zeros before
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decimal points in formatted and list-directed output, to be compatible
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with many other compilers (#define WANT_LEAD_0). Either way is
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standard-conforming, however, and you should try to avoid writing
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code that assumes one format or another.
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- dtime_() and etime_() are from Dave Love's libU77, not from
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netlib's libF77.
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