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Remove obsolete information about altering default optimization flags for

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gcc.  Per comment from original author, Brian Gallew:
"Ancient history.  Kill it fast."
This commit is contained in:
Tom Lane 2003-10-23 13:58:43 +00:00
parent cdbf9b328e
commit 747df1a35e
3 changed files with 2 additions and 81 deletions
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77
doc/src/sgml/compiler.sgml
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@ -1,77 +0,0 @@
<Chapter Id="compiler">
<DocInfo>
<AuthorGroup>
<Author>
<FirstName>Brian</FirstName>
<Surname>Gallew</Surname>
</Author>
</AuthorGroup>
<Date>Transcribed 1998-02-12</Date>
</DocInfo>
<Title><application>gcc</application> Default Optimizations</Title>
<Para>
<Note>
<Para>
Contributed by Brian Gallew (<email>geek+@cmu.edu</email>)
</Para>
</Note>
</para>
<Para>
Configuring gcc to use certain flags by default is a simple matter of
editing the
<FileName>/usr/local/lib/gcc-lib/<Replaceable>platform</Replaceable>/<Replaceable>version</Replaceable>/specs</FileName>
file.
The format of this file pretty simple. The file is broken into
sections, each of which is three lines long. The first line is
"*<Replaceable>section_name</Replaceable>:" (e.g. "*asm:").
The second line is a list of flags,
and the third line is blank.
</para>
<Para>
The easiest change to make is to append
the desired default flags to the list in the appropriate section. As
an example, let's suppose that I have linux running on a '486 with gcc
2.7.2 installed in the default location. In the file
/usr/local/lib/gcc-lib/i486-linux/2.7.2/specs, 13 lines down I find
the following section:
<ProgramListing>
- ----------SECTION----------
*cc1:
- ----------SECTION----------
</ProgramListing>
As you can see, there aren't any default flags. If I always wanted
compiles of C code to use "-m486 -fomit-frame-pointer", I would
change it to look like:
<ProgramListing>
- ----------SECTION----------
*cc1:
- -m486 -fomit-frame-pointer
- ----------SECTION----------
</ProgramListing>
If I wanted to be able to generate 386 code for another, older linux
box lying around, I'd have to make it look like this:
<ProgramListing>
- ----------SECTION----------
*cc1:
%{!m386:-m486} -fomit-frame-pointer
- ----------SECTION----------
</ProgramListing>
This will always omit frame pointers, any will build 486-optimized
code unless -m386 is specified on the command line.
</para>
<Para>
You can actually do quite a lot of customization with the specs file.
Always remember, however, that these changes are global, and affect
all users of the system.
</para>
</Chapter>

3
doc/src/sgml/filelist.sgml
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@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/filelist.sgml,v 1.32 2003/10/22 22:28:10 tgl Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/filelist.sgml,v 1.33 2003/10/23 13:58:43 tgl Exp $ -->
<!entity history SYSTEM "history.sgml">
<!entity info SYSTEM "info.sgml">
@ -77,7 +77,6 @@
<!entity arch-dev SYSTEM "arch-dev.sgml">
<!entity bki SYSTEM "bki.sgml">
<!entity catalogs SYSTEM "catalogs.sgml">
<!entity compiler SYSTEM "compiler.sgml">
<!entity geqo SYSTEM "geqo.sgml">
<!entity gist SYSTEM "gist.sgml">
<!entity indexcost SYSTEM "indexcost.sgml">

3
doc/src/sgml/postgres.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/postgres.sgml,v 1.58 2003/10/22 22:28:10 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/postgres.sgml,v 1.59 2003/10/23 13:58:43 tgl Exp $
-->
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook V3.1//EN" [
@ -239,7 +239,6 @@ $Header: /cvsroot/pgsql/doc/src/sgml/postgres.sgml,v 1.58 2003/10/22 22:28:10 tg
&gist;
&page;
&bki;
&compiler;
</part>