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authorIan Lance Taylor <ian@airs.com>1995-10-25 15:28:28 +0000
committerIan Lance Taylor <ian@airs.com>1995-10-25 15:28:28 +0000
commite54bf1c1a4f0c267c2903e5a6c5cc64219ad4f62 (patch)
tree2e3b1e5d303c6ac3c4bd843c738f1aba81348f3f /ld
parent9b820af837c1319be779d0ad8f5b9678f08ba410 (diff)
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* ld.texinfo: The MRI ALIGN directive is supported.
Diffstat (limited to 'ld')
-rw-r--r--ld/ChangeLog16
-rw-r--r--ld/ld.texinfo71
2 files changed, 78 insertions, 9 deletions
diff --git a/ld/ChangeLog b/ld/ChangeLog
index 646644c..38a9f88 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,5 +1,21 @@
+Wed Oct 25 11:27:25 1995 Ian Lance Taylor <ian@cygnus.com>
+
+ * ld.texinfo: The MRI ALIGN directive is supported.
+
+Mon Oct 23 11:46:43 1995 James G. Smith <jsmith@pasanda.cygnus.co.uk>
+
+ * emulparams/elf32vr4300.sh: Deleted.
+ * emulparams/elf32vr4300el.sh: Deleted.
+ * emulparams/elf32b4300.sh: Added.
+ * emulparams/elf32l4300.sh: Added.
+ * configure.tgt, Makefile.in: Updated the build to use the
+ new 8.3 unique names.
+
Thu Oct 19 17:41:46 1995 Ian Lance Taylor <ian@cygnus.com>
+ * ldlang.c (entry_symbol): Make non-static.
+ * ldlang.h (entry_symbol): Declare.
+
* ldlex.l: Treat PROVIDE as a keyword in expression state.
Wed Oct 18 17:34:06 1995 steve chamberlain <sac@slash.cygnus.com>
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index 33cc717..c10c52e 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -178,8 +178,9 @@ ld [ -o @var{output} ] @var{objfile}@dots{}
[ -Map @var{mapfile} ] [ -m @var{emulation} ] [ -N | -n ]
[ -noinhibit-exec ] [ -no-keep-memory ] [ -oformat @var{output-format} ]
[ -R @var{filename} ] [ -relax ] [ -retain-symbols-file @var{filename} ]
- [ -r | -Ur ] [ -rpath @var{dir} ] [ -S ] [ -s ] [ -soname @var{name} ]
- [ -shared ] [ -sort-common ] [ -stats ] [ -T @var{commandfile} ]
+ [ -r | -Ur ] [ -rpath @var{dir} ] [-rpath-link @var{dir} ]
+ [ -S ] [ -s ] [ -soname @var{name} ] [ -shared ]
+ [ -sort-common ] [ -stats ] [ -T @var{commandfile} ]
[ -Ttext @var{org} ] [ -Tdata @var{org} ]
[ -Tbss @var{org} ] [ -t ] [ -traditional-format ]
[ -u @var{symbol}] [-V] [-v] [ -verbose] [ -version ]
@@ -467,9 +468,9 @@ at the point in which the linker script appears in the command line.
@cindex link map
@kindex -M
@item -M
-Print (to the standard output) a link map---diagnostic information
-about where symbols are mapped by @code{ld}, and information on global
-common storage allocation.
+Print (to the standard output) a link map---diagnostic information about
+where symbols are mapped by @code{ld}, and information on global common
+storage allocation.
@cindex link map
@kindex -Map
@@ -600,17 +601,62 @@ line. It overrides @samp{-s} and @samp{-S}.
Add a directory to the runtime library search path. This is used when
linking an ELF executable with shared objects. All @code{-rpath}
arguments are concatenated and passed to the runtime linker, which uses
-them to locate shared objects at runtime.
+them to locate shared objects at runtime. The @code{-rpath} option is
+also used when locating shared objects which are needed by shared
+objects explicitly included in the link; see the description of the
+@code{-rpath-link} option.
The @code{-rpath} option may also be used on SunOS. By default, on
SunOS, the linker will form a runtime search patch out of all the
-@code{-L} options it is given. If a @code{rpath} option is used, the
+@code{-L} options it is given. If a @code{-rpath} option is used, the
runtime search path will be formed exclusively using the @code{-rpath}
options, ignoring the @code{-L} options. This can be useful when using
gcc, which adds many @code{-L} options which may be on NFS mounted
filesystems.
@end ifset
+@ifset GENERIC
+@cindex link-time runtime library search path
+@kindex -rpath-link
+@item -rpath-link @var{DIR}
+When using ELF or SunOS, one shared library may require another. This
+happens when an @code{ld -shared} link includes a shared library as one
+of the input files.
+
+When the linker encounters such a dependency when doing a non-shared,
+non-relocateable link, it will automatically try to locate the required
+shared library and include it in the link, if it is not included
+explicitly. In such a case, the @code{-rpath-link} option
+specifies the first set of directories to search. The
+@code{-rpath-link} option may specify a sequence of directory names
+either by specifying a list of names separated by colons, or by
+appearing multiple times.
+
+The linker uses the following search paths to locate required shared
+libraries.
+@enumerate
+@item
+Any directories specified by @code{-rpath-link} options.
+@item
+Any directories specified by @code{-rpath} options. The difference
+between @code{-rpath} and @code{-rpath-link} is that directories
+specified by @code{-rpath} options are included in the executable and
+used at runtime, whereas the @code{-rpath-link} option is only effective
+at link time.
+@item
+On SunOS, if the @code{-rpath} option was not used, search any
+directories specified using @code{-L} options.
+@item
+For a native linker, the contents of the environment variable
+@code{LD_LIBRARY_PATH}.
+@item
+The default directories, normally @file{/lib} and @file{/usr/lib}.
+@end enumerate
+
+If the required shared library is not found, the linker will issue a
+warning and continue with the link.
+@end ifset
+
@cindex partial link
@cindex relocatable output
@kindex -r
@@ -651,8 +697,10 @@ field rather than the using the file name given to the linker.
@item -shared
@cindex shared libraries
@kindex -shared
-Create a shared library. This is currently only supported on ELF
-platforms.
+Create a shared library. This is currently only supported on ELF and
+SunOS platforms. On SunOS, the linker will automatically create a
+shared library if the @code{-e} option is not used and there are
+undefined symbols in the link.
@item -sort-common
@kindex -sort-common
@@ -2441,6 +2489,11 @@ in a section called @var{out-secname} in the linker output file.
@var{in-secname} may be an integer.
+@cindex @code{ALIGN} (MRI)
+@item ALIGN @var{secname} = @var{expression}
+Align the section called @var{secname} to @var{expression}. The
+@var{expression} should be a power of two.
+
@cindex @code{BASE} (MRI)
@item BASE @var{expression}
Use the value of @var{expression} as the lowest address (other than