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tm.texi: Update documentation to reflect reality of exec and start file search behaviours.

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gcc/

2007-01-09  Carlos O'Donell  <carlos@codesourcery.com>

	* doc/tm.texi: Update documentation to reflect reality of exec
	and start file search behaviours. Update copyright year.
	* doc/invoke.texi: Explain how GCC_EXEC_PREFIX is used to find
	header file directories.

From-SVN: r120622
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Carlos O'Donell 2007-01-09 21:08:19 +00:00 committed by Carlos O'Donell
parent 97b8365caf
commit fe037b8a3d
3 changed files with 44 additions and 13 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2007-01-09 Carlos O'Donell <carlos@codesourcery.com>
* doc/tm.texi: Update documentation to reflect reality of exec
and start file search behaviours. Update copyright year.
* doc/invoke.texi: Explain how GCC_EXEC_PREFIX is used to find
header file directories.
2007-01-09 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (*sinxf2): Rename to *sinxf2_i387.

7
gcc/doc/invoke.texi
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@ -13947,7 +13947,8 @@ If GCC cannot find the subprogram using the specified prefix, it
tries looking in the usual places for the subprogram.
The default value of @env{GCC_EXEC_PREFIX} is
@file{@var{prefix}/lib/gcc/} where @var{prefix} is the value
@file{@var{prefix}/lib/gcc/} where @var{prefix} is the prefix to
the installed compiler. In many cases @var{prefix} is the value
of @code{prefix} when you ran the @file{configure} script.
Other prefixes specified with @option{-B} take precedence over this prefix.
@ -13963,7 +13964,9 @@ replacing that beginning with the specified prefix to produce an
alternate directory name. Thus, with @option{-Bfoo/}, GCC will search
@file{foo/bar} where it would normally search @file{/usr/local/lib/bar}.
These alternate directories are searched first; the standard directories
come next.
come next. If a standard directory begins with the configured
@var{prefix} then the value of @var{prefix} is replaced by
@env{GCC_EXEC_PREFIX} when looking for header files.
@item COMPILER_PATH
@findex COMPILER_PATH

43
gcc/doc/tm.texi
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@ -1,5 +1,5 @@
@c Copyright (C) 1988,1989,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,
@c 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
@c 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
@c This is part of the GCC manual.
@c For copying conditions, see the file gcc.texi.
@ -615,19 +615,26 @@ Here is the order of prefixes tried for exec files:
Any prefixes specified by the user with @option{-B}.
@item
The environment variable @code{GCC_EXEC_PREFIX}, if any.
The environment variable @code{GCC_EXEC_PREFIX} or, if @code{GCC_EXEC_PREFIX}
is not set and the compiler has not been installed in the configure-time
@var{prefix}, the location in which the compiler has actually been installed.
@item
The directories specified by the environment variable @code{COMPILER_PATH}.
@item
The macro @code{STANDARD_EXEC_PREFIX}.
The macro @code{STANDARD_EXEC_PREFIX}, if the compiler has been installed
in the configured-time @var{prefix}.
@item
@file{/usr/lib/gcc/}.
The location @file{/usr/libexec/gcc/}, but only if this is a native compiler.
@item
The macro @code{MD_EXEC_PREFIX}, if any.
The location @file{/usr/lib/gcc/}, but only if this is a native compiler.
@item
The macro @code{MD_EXEC_PREFIX}, if defined, but only if this is a native
compiler.
@end enumerate
Here is the order of prefixes tried for startfiles:
@ -637,31 +644,45 @@ Here is the order of prefixes tried for startfiles:
Any prefixes specified by the user with @option{-B}.
@item
The environment variable @code{GCC_EXEC_PREFIX}, if any.
The environment variable @code{GCC_EXEC_PREFIX} or its automatically determined
value based on the installed toolchain location.
@item
The directories specified by the environment variable @code{LIBRARY_PATH}
(or port-specific name; native only, cross compilers do not use this).
@item
The macro @code{STANDARD_EXEC_PREFIX}.
The macro @code{STANDARD_EXEC_PREFIX}, but only if the toolchain is installed
in the configured @var{prefix} or this is a native compiler.
@item
@file{/usr/lib/gcc/}.
The location @file{/usr/lib/gcc/}, but only if this is a native compiler.
@item
The macro @code{MD_EXEC_PREFIX}, if any.
The macro @code{MD_EXEC_PREFIX}, if defined, but only if this is a native
compiler.
@item
The macro @code{MD_STARTFILE_PREFIX}, if any.
The macro @code{MD_STARTFILE_PREFIX}, if defined, but only if this is a
native compiler, or we have a target system root.
@item
The macro @code{STANDARD_STARTFILE_PREFIX}.
The macro @code{MD_STARTFILE_PREFIX_1}, if defined, but only if this is a
native compiler, or we have a target system root.
@item
The macro @code{STANDARD_STARTFILE_PREFIX}, with any sysroot modifications.
If this path is relative it will be prefixed by @code{GCC_EXEC_PREFIX} and
the machine suffix or @code{STANDARD_EXEC_PREFIX} and the machine suffix.
@item
The macro @code{STANDARD_STARTFILE_PREFIX_1}, but only if this is a native
compiler, or we have a target system root. The default for this macro is
@file{/lib/}.
@item
The macro @code{STANDARD_STARTFILE_PREFIX_2}, but only if this is a native
compiler, or we have a target system root. The default for this macro is
@file{/usr/lib/}.
@end enumerate