mirror of https://github.com/mkerrisk/man-pages
ld.so.8: Reorder lists of LD_* environment variables alphabetically
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk
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man8/ld.so.8
164
man8/ld.so.8
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@ -126,6 +126,14 @@ Ignore RPATH and RUNPATH information in object names in LIST.
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.SH ENVIRONMENT
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There are four important environment variables.
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.TP
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.B LD_BIND_NOW
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(libc5; glibc since 2.1.1)
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If set to a non-empty string,
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causes the dynamic linker to resolve all symbols
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at program startup instead of deferring function call resolution to the point
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when they are first referenced.
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This is useful when using a debugger.
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.TP
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.B LD_LIBRARY_PATH
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A colon-separated list of directories in which to search for
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ELF libraries at execution-time.
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@ -141,14 +149,6 @@ For set-user-ID/set-group-ID ELF binaries,
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only libraries in the standard search
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directories that are also set-user-ID will be loaded.
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.TP
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.B LD_BIND_NOW
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(libc5; glibc since 2.1.1)
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If set to a non-empty string,
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causes the dynamic linker to resolve all symbols
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at program startup instead of deferring function call resolution to the point
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when they are first referenced.
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This is useful when using a debugger.
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.TP
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.B LD_TRACE_LOADED_OBJECTS
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(ELF only)
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If set to a non-empty string, causes the program to list its dynamic library
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@ -159,33 +159,21 @@ instead of running normally.
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Then there are lots of more or less obscure variables,
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many obsolete or only for internal use.
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.TP
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.B LD_USE_LOAD_BIAS
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.\" http://sources.redhat.com/ml/libc-hacker/2003-11/msg00127.html
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.\" Subject: [PATCH] Support LD_USE_LOAD_BIAS
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.\" Jakub Jelinek
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By default (i.e., if this variable is not defined)
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executables and prelinked
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shared objects will honor base addresses of their dependent libraries
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and (non-prelinked) position-independent executables (PIEs)
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and other shared objects will not honor them.
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If
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.B LD_USE_LOAD_BIAS
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is defined wit the value, both executables and PIEs
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will honor the base addresses.
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If
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.B LD_USE_LOAD_BIAS
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is defined with the value 0,
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neither executables nor PIEs will honor the base addresses.
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This variable is ignored by set-user-ID and set-group-ID programs.
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.B LD_AOUT_LIBRARY_PATH
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(libc5)
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Version of
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.B LD_LIBRARY_PATH
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for a.out binaries only.
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Old versions of ld\-linux.so.1 also supported
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.BR LD_ELF_LIBRARY_PATH .
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.TP
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.B LD_WARN
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(ELF only)(glibc since 2.1.3)
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If set to a non-empty string, warn about unresolved symbols.
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.TP
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.B LD_NOWARN
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(a.out only)(libc5)
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Suppress warnings about a.out libraries with incompatible minor
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version numbers.
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.B LD_AOUT_PRELOAD
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(libc5)
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Version of
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.B LD_PRELOAD
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for a.out binaries only.
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Old versions of ld\-linux.so.1 also supported
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.BR LD_ELF_PRELOAD .
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.TP
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.B LD_BIND_NOT
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(glibc since 2.1.95)
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@ -213,17 +201,35 @@ output should be fed into, default is standard output.
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.B LD_DEBUG_OUTPUT
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is ignored for set-user-ID/set-group-ID binaries.
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.TP
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.B LD_VERBOSE
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.B LD_DYNAMIC_WEAK
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(glibc since 2.1.91)
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Allow weak symbols to be overridden (reverting to old glibc behavior).
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For security reasons, since glibc 2.3.4,
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.B LD_DYNAMIC_WEAK
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is ignored for set-user-ID/set-group-ID binaries.
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.TP
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.B LD_HWCAP_MASK
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(glibc since 2.1)
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If set to a non-empty string,
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output symbol versioning information about the
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program if querying information about the program (i.e., either
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.B LD_TRACE_LOADED_OBJECTS
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has been set, or
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.B \-\-list
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or
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.B \-\-verify
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options have been given to the dynamic linker).
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Mask for hardware capabilities.
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.TP
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.B LD_KEEPDIR
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(a.out only)(libc5)
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Don't ignore the directory in the names of a.out libraries to be loaded.
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Use of this option is strongly discouraged.
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.TP
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.B LD_NOWARN
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(a.out only)(libc5)
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Suppress warnings about a.out libraries with incompatible minor
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version numbers.
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.TP
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.B LD_ORIGIN_PATH
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(glibc since 2.1)
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Path where the binary is found (for non-set-user-ID programs).
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For security reasons, since glibc 2.4,
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.B LD_ORIGIN_PATH
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is ignored for set-user-ID/set-group-ID binaries.
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.\" Only used if $ORIGIN can't be determined by normal means
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.\" (from the origin path saved at load time, or from /proc/self/exe)?
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.TP
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.B LD_PROFILE
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(glibc since 2.1)
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@ -237,22 +243,6 @@ output should be written; default is standard output.
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.B LD_PROFILE_OUTPUT
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is ignored for set-user-ID/set-group-ID binaries.
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.TP
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.B LD_AOUT_LIBRARY_PATH
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(libc5)
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Version of
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.B LD_LIBRARY_PATH
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for a.out binaries only.
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Old versions of ld\-linux.so.1 also supported
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.BR LD_ELF_LIBRARY_PATH .
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.TP
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.B LD_AOUT_PRELOAD
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(libc5)
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Version of
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.B LD_PRELOAD
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for a.out binaries only.
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Old versions of ld\-linux.so.1 also supported
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.BR LD_ELF_PRELOAD .
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.TP
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.B LD_SHOW_AUXV
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(glibc since 2.1)
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Show auxiliary array passed up from the kernel.
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@ -260,30 +250,40 @@ For security reasons, since glibc 2.3.5,
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.B LD_SHOW_AUXV
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is ignored for set-user-ID/set-group-ID binaries.
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.TP
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.B LD_HWCAP_MASK
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.B LD_USE_LOAD_BIAS
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.\" http://sources.redhat.com/ml/libc-hacker/2003-11/msg00127.html
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.\" Subject: [PATCH] Support LD_USE_LOAD_BIAS
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.\" Jakub Jelinek
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By default (i.e., if this variable is not defined)
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executables and prelinked
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shared objects will honor base addresses of their dependent libraries
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and (non-prelinked) position-independent executables (PIEs)
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and other shared objects will not honor them.
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If
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.B LD_USE_LOAD_BIAS
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is defined wit the value, both executables and PIEs
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will honor the base addresses.
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If
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.B LD_USE_LOAD_BIAS
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is defined with the value 0,
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neither executables nor PIEs will honor the base addresses.
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This variable is ignored by set-user-ID and set-group-ID programs.
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.TP
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.B LD_VERBOSE
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(glibc since 2.1)
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Mask for hardware capabilities.
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If set to a non-empty string,
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output symbol versioning information about the
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program if querying information about the program (i.e., either
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.B LD_TRACE_LOADED_OBJECTS
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has been set, or
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.B \-\-list
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or
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.B \-\-verify
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options have been given to the dynamic linker).
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.TP
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.B LD_ORIGIN_PATH
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(glibc since 2.1)
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Path where the binary is found (for non-set-user-ID programs).
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For security reasons, since glibc 2.4,
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.B LD_ORIGIN_PATH
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is ignored for set-user-ID/set-group-ID binaries.
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.\" Only used if $ORIGIN can't be determined by normal means
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.\" (from the origin path saved at load time, or from /proc/self/exe)?
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.TP
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.B LD_DYNAMIC_WEAK
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(glibc since 2.1.91)
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Allow weak symbols to be overridden (reverting to old glibc behavior).
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For security reasons, since glibc 2.3.4,
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.B LD_DYNAMIC_WEAK
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is ignored for set-user-ID/set-group-ID binaries.
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.TP
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.B LD_KEEPDIR
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(a.out only)(libc5)
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Don't ignore the directory in the names of a.out libraries to be loaded.
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Use of this option is strongly discouraged.
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.B LD_WARN
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(ELF only)(glibc since 2.1.3)
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If set to a non-empty string, warn about unresolved symbols.
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.TP
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.B LDD_ARGV0
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(libc5)
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