* alloca.c, clock.c, getcwd.c, getpagesize.c, getpwd.c, index.c,

	libiberty.texi, memchr.c, putenv.c, rindex.c, strchr.c, strdup.c,
	strerror.c, strrchr.c, strstr.c, strtod.c, tmpnam.c, vfork.c,
	xatexit.c, xmalloc.c, xstrerror.c: Improve manual formatting.  Fix
	spelling.  Give names to function arguments in documentation.  Use
	(void) prototypes in documentation.
	* functions.texi: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@46068 138bc75d-0d04-0410-961f-82ee72b054a4

23 files changed, 70 insertions, 60 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 98c091698cd..93408dc3b97 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,13 @@
+2001-10-07  Joseph S. Myers  <jsm28@cam.ac.uk>
+
+	* alloca.c, clock.c, getcwd.c, getpagesize.c, getpwd.c, index.c,
+	libiberty.texi, memchr.c, putenv.c, rindex.c, strchr.c, strdup.c,
+	strerror.c, strrchr.c, strstr.c, strtod.c, tmpnam.c, vfork.c,
+	xatexit.c, xmalloc.c, xstrerror.c: Improve manual formatting.  Fix
+	spelling.  Give names to function arguments in documentation.  Use
+	(void) prototypes in documentation.
+	* functions.texi: Regenerate.
+
 2001-10-07  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* argv.c (buildargv, tests, main): Const-ify.
diff --git a/libiberty/alloca.c b/libiberty/alloca.c
index 9c07e0d481c..e98a053fbee 100644
--- a/libiberty/alloca.c
+++ b/libiberty/alloca.c
@@ -23,7 +23,7 @@
 
 /*
 
-@deftypefn Replacement void* alloca (size_t)
+@deftypefn Replacement void* alloca (size_t @var{size})
 
 This function allocates memory which will be automatically reclaimed
 after the procedure exits.  The @libib{} implementation does not free
@@ -36,7 +36,7 @@ GNU Autoconf test @code{AC_FUNC_ALLOCA} to test for and properly make
 available this function.  The @code{AC_FUNC_ALLOCA} test requires that
 client code use a block of preprocessor code to be safe (see the Autoconf
 manual for more); this header incorporates that logic and more, including
-the possibility of a GCC builtin function.
+the possibility of a GCC built-in function.
 
 @end deftypefn
 
diff --git a/libiberty/clock.c b/libiberty/clock.c
index 187af7049c2..3ea70c31c60 100644
--- a/libiberty/clock.c
+++ b/libiberty/clock.c
@@ -24,7 +24,7 @@ the executable file might be covered by the GNU General Public License. */
 
 /*
 
-@deftypefn Supplemental long clock ()
+@deftypefn Supplemental long clock (void)
 
 Returns an approximation of the CPU time used by the process as a
 @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the
diff --git a/libiberty/functions.texi b/libiberty/functions.texi
index c00d047dfa8..4ce7e9caa9d 100644
--- a/libiberty/functions.texi
+++ b/libiberty/functions.texi
@@ -4,7 +4,7 @@
 @c and let gather-docs build you a new copy.
 
 @c alloca.c:26
-@deftypefn Replacement void* alloca (size_t)
+@deftypefn Replacement void* alloca (size_t @var{size})
 
 This function allocates memory which will be automatically reclaimed
 after the procedure exits.  The @libib{} implementation does not free
@@ -17,7 +17,7 @@ GNU Autoconf test @code{AC_FUNC_ALLOCA} to test for and properly make
 available this function.  The @code{AC_FUNC_ALLOCA} test requires that
 client code use a block of preprocessor code to be safe (see the Autoconf
 manual for more); this header incorporates that logic and more, including
-the possibility of a GCC builtin function.
+the possibility of a GCC built-in function.
 
 @end deftypefn
 
@@ -86,7 +86,7 @@ Uses @code{malloc} to allocate storage for @var{nelem} objects of
 @end deftypefn
 
 @c clock.c:27
-@deftypefn Supplemental long clock ()
+@deftypefn Supplemental long clock (void)
 
 Returns an approximation of the CPU time used by the process as a
 @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the
@@ -105,7 +105,7 @@ fact, the manual page for @code{perror(3C)} explicitly warns that one
 should check the size of the table (@code{sys_nerr}) before indexing
 it, since new error codes may be added to the system before they are
 added to the table.  Thus @code{sys_nerr} might be smaller than value
-implied by the largest @code{errno} value defined in @file{errno.h}.
+implied by the largest @code{errno} value defined in @code{<errno.h>}.
 
 We return the maximum value that can be used to obtain a meaningful
 symbolic name or message.
@@ -113,20 +113,20 @@ symbolic name or message.
 @end deftypefn
 
 @c getcwd.c:6
-@deftypefn Supplemental char* getcwd (char *@var{pathname}, @var{len})
+@deftypefn Supplemental char* getcwd (char *@var{pathname}, int @var{len})
 
 Copy the absolute pathname for the current working directory into
 @var{pathname}, which is assumed to point to a buffer of at least
 @var{len} bytes, and return a pointer to the buffer.  If the current
 directory's path doesn't fit in @var{len} characters, the result is
-NULL and @var{errno} is set.  If @var{pathname} is a null pointer,
+@code{NULL} and @code{errno} is set.  If @var{pathname} is a null pointer,
 @code{getcwd} will obtain @var{len} bytes of space using
 @code{malloc}.
 
 @end deftypefn
 
 @c getpagesize.c:5
-@deftypefn Supplemental int getpagesize ()
+@deftypefn Supplemental int getpagesize (void)
 
 Returns the number of bytes in a page of memory.  This is the
 granularity of many of the system memory management routines.  No
@@ -136,7 +136,7 @@ memory management hardware page size.
 @end deftypefn
 
 @c getpwd.c:5
-@deftypefn Supplemental char* getpwd ()
+@deftypefn Supplemental char* getpwd (void)
 
 Returns the current working directory.  This implementation caches the
 result on the assumption that the process will not call @code{chdir}
@@ -148,7 +148,7 @@ between calls to @code{getpwd}.
 @deftypefn Supplemental char* index (char *@var{s}, int @var{c})
 
 Returns a pointer to the first occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  The use of @code{index} is
+the string @var{s}, or @code{NULL} if not found.  The use of @code{index} is
 deprecated in new programs in favor of @code{strchr}.
 
 @end deftypefn
@@ -156,12 +156,12 @@ deprecated in new programs in favor of @code{strchr}.
 @c memchr.c:3
 @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n})
 
-This function searches memory starting at @code{*}@var{src} for the
+This function searches memory starting at @code{*@var{s}} for the
 character @var{c}.  The search only ends with the first occurrence of
 @var{c}, or after @var{length} characters; in particular, a null
 character does not terminate the search.  If the character @var{c} is
-found within @var{length} characters of @code{*}@var{src}, a pointer
-to the character is returned. If @var{c} is not found, then NULL is
+found within @var{length} characters of @code{*@var{s}}, a pointer
+to the character is returned.  If @var{c} is not found, then @code{NULL} is
 returned.
 
 @end deftypefn
@@ -206,7 +206,7 @@ Sets the first @var{count} bytes of @var{s} to the constant byte
 
 Uses @code{setenv} or @code{unsetenv} to put @var{string} into
 the environment or remove it.  If @var{string} is of the form
-@samp{name=value} the string is added; if no `=' is present the
+@samp{name=value} the string is added; if no @samp{=} is present the
 name is unset/removed.
 
 @end deftypefn
@@ -223,7 +223,7 @@ exists, it is removed.
 @deftypefn Supplemental char* rindex (const char *@var{s}, int @var{c})
 
 Returns a pointer to the last occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  The use of @code{rindex} is
+the string @var{s}, or @code{NULL} if not found.  The use of @code{rindex} is
 deprecated in new programs in favor of @code{strrchr}.
 
 @end deftypefn
@@ -260,7 +260,7 @@ A case-insensitive @code{strcmp}.
 @deftypefn Supplemental char* strchr (const char *@var{s}, int @var{c})
 
 Returns a pointer to the first occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  If @var{c} is itself the
+the string @var{s}, or @code{NULL} if not found.  If @var{c} is itself the
 null character, the results are undefined.
 
 @end deftypefn
@@ -269,7 +269,7 @@ null character, the results are undefined.
 @deftypefn Supplemental char* strdup (const char *@var{s})
 
 Returns a pointer to a copy of @var{s} in memory obtained from
-@code{malloc}, or NULL if insufficient memory was available.
+@code{malloc}, or @code{NULL} if insufficient memory was available.
 
 @end deftypefn
 
@@ -278,7 +278,7 @@ Returns a pointer to a copy of @var{s} in memory obtained from
 
 Given an error number returned from a system call (typically returned
 in @code{errno}), returns a pointer to a string containing the
-symbolic name of that error number, as found in @file{errno.h}.
+symbolic name of that error number, as found in @code{<errno.h>}.
 
 If the supplied error number is within the valid range of indices for
 symbolic names, but no name is available for the particular error
@@ -286,7 +286,7 @@ number, then returns the string @samp{"Error @var{num}"}, where @var{num}
 is the error number.
 
 If the supplied error number is not within the range of valid
-indices, then returns NULL.
+indices, then returns @code{NULL}.
 
 The contents of the location pointed to are only guaranteed to be
 valid until the next call to @code{strerrno}.
@@ -307,7 +307,7 @@ error number, then returns the string @samp{"Error @var{num}"}, where
 @var{num} is the error number.
 
 If the supplied error number is not a valid index into
-@code{sys_errlist}, returns NULL.
+@code{sys_errlist}, returns @code{NULL}.
 
 The returned string is only guaranteed to be valid only until the
 next call to @code{strerror}.
@@ -333,7 +333,7 @@ Compares the first @var{n} bytes of two strings, returning a value as
 @deftypefn Supplemental char* strrchr (const char *@var{s}, int @var{c})
 
 Returns a pointer to the last occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  If @var{c} is itself the
+the string @var{s}, or @code{NULL} if not found.  If @var{c} is itself the
 null character, the results are undefined.
 
 @end deftypefn
@@ -343,7 +343,7 @@ null character, the results are undefined.
 
 This function searches for the substring @var{sub} in the string
 @var{string}, not including the terminating null characters.  A pointer
-to the first occurrence of @var{sub} is returned, or NULL if the
+to the first occurrence of @var{sub} is returned, or @code{NULL} if the
 substring is absent.  If @var{sub} points to a string with zero
 length, the function returns @var{string}.
 
@@ -353,7 +353,7 @@ length, the function returns @var{string}.
 @deftypefn Supplemental double strtod (const char *@var{string}, char **@var{endptr})
 
 This ANSI C function converts the initial portion of @var{string} to a
-@code{double}.  If @var{endptr} is not NULL, a pointer to the
+@code{double}.  If @var{endptr} is not @code{NULL}, a pointer to the
 character after the last character used in the conversion is stored in
 the location referenced by @var{endptr}.  If no conversion is
 performed, zero is returned and the value of @var{string} is stored in
@@ -364,7 +364,7 @@ the location referenced by @var{endptr}.
 @c strerror.c:730
 @deftypefn Replacement int strtoerrno (const char *@var{name})
 
-Given the symbolic name of a error number (e.g., @code{EACCESS}), map it
+Given the symbolic name of a error number (e.g., @code{EACCES}), map it
 to an errno value.  If no translation is found, returns 0.
 
 @end deftypefn
@@ -389,13 +389,13 @@ When the base is 16 (either explicitly or implicitly), a prefix of
 This function attempts to create a name for a temporary file, which
 will be a valid file name yet not exist when @code{tmpnam} checks for
 it.  @var{s} must point to a buffer of at least @code{L_tmpnam} bytes,
-or be NULL.  Use of this function creates a security risk, and it must
+or be @code{NULL}.  Use of this function creates a security risk, and it must
 not be used in new projects.  Use @code{mkstemp} instead.
 
 @end deftypefn
 
 @c vfork.c:6
-@deftypefn Supplemental int vfork ()
+@deftypefn Supplemental int vfork (void)
 
 Emulates @code{vfork} by calling @code{fork} and returning its value.
 
@@ -428,14 +428,14 @@ does the return value.  The third argument is unused in @libib{}.
 @deftypefun int xatexit (void (*@var{fn}) (void))
 
 Behaves as the standard @code{atexit} function, but with no limit on
-the number of registered functions.  Returns 0 on success, or -1 on
+the number of registered functions.  Returns 0 on success, or @minus{}1 on
 failure.  If you use @code{xatexit} to register functions, you must use
 @code{xexit} to terminate your program.
 
 @end deftypefun
 
 @c xmalloc.c:38
-@deftypefn Replacement void* xcalloc (size_t, size_t)
+@deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize})
 
 Allocate memory without fail, and set it to zero.  This routine functions
 like @code{calloc}, but will behave the same as @code{xmalloc} if memory
@@ -491,7 +491,7 @@ allocated, the remaining memory is zeroed.
 @end deftypefn
 
 @c xmalloc.c:32
-@deftypefn Replacement void* xrealloc (void*, size_t)
+@deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size})
 Reallocate memory without fail.  This routine functions like @code{realloc},
 but will behave the same as @code{xmalloc} if memory cannot be found.
 
@@ -509,7 +509,7 @@ obtain memory.
 @deftypefn Replacement char* xstrerror (int @var{errnum})
 
 Behaves exactly like the standard @code{strerror} function, but
-will never return a NULL pointer.
+will never return a @code{NULL} pointer.
 
 @end deftypefn
 
diff --git a/libiberty/getcwd.c b/libiberty/getcwd.c
index 8c7c04ceb4e..465b4e0b2aa 100644
--- a/libiberty/getcwd.c
+++ b/libiberty/getcwd.c
@@ -3,13 +3,13 @@
 
 /*
 
-@deftypefn Supplemental char* getcwd (char *@var{pathname}, @var{len})
+@deftypefn Supplemental char* getcwd (char *@var{pathname}, int @var{len})
 
 Copy the absolute pathname for the current working directory into
 @var{pathname}, which is assumed to point to a buffer of at least
 @var{len} bytes, and return a pointer to the buffer.  If the current
 directory's path doesn't fit in @var{len} characters, the result is
-NULL and @var{errno} is set.  If @var{pathname} is a null pointer,
+@code{NULL} and @code{errno} is set.  If @var{pathname} is a null pointer,
 @code{getcwd} will obtain @var{len} bytes of space using
 @code{malloc}.
 
diff --git a/libiberty/getpagesize.c b/libiberty/getpagesize.c
index 05b8110ad3c..eed9680378a 100644
--- a/libiberty/getpagesize.c
+++ b/libiberty/getpagesize.c
@@ -2,7 +2,7 @@
 
 /*
 
-@deftypefn Supplemental int getpagesize ()
+@deftypefn Supplemental int getpagesize (void)
 
 Returns the number of bytes in a page of memory.  This is the
 granularity of many of the system memory management routines.  No
diff --git a/libiberty/getpwd.c b/libiberty/getpwd.c
index c5408794a27..f508b1e21e5 100644
--- a/libiberty/getpwd.c
+++ b/libiberty/getpwd.c
@@ -2,7 +2,7 @@
 
 /*
 
-@deftypefn Supplemental char* getpwd ()
+@deftypefn Supplemental char* getpwd (void)
 
 Returns the current working directory.  This implementation caches the
 result on the assumption that the process will not call @code{chdir}
diff --git a/libiberty/index.c b/libiberty/index.c
index 55a4acc17c2..a2e272783b9 100644
--- a/libiberty/index.c
+++ b/libiberty/index.c
@@ -5,7 +5,7 @@
 @deftypefn Supplemental char* index (char *@var{s}, int @var{c})
 
 Returns a pointer to the first occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  The use of @code{index} is
+the string @var{s}, or @code{NULL} if not found.  The use of @code{index} is
 deprecated in new programs in favor of @code{strchr}.
 
 @end deftypefn
diff --git a/libiberty/libiberty.texi b/libiberty/libiberty.texi
index a13bf2c4e17..4b60d6a07fb 100644
--- a/libiberty/libiberty.texi
+++ b/libiberty/libiberty.texi
@@ -65,7 +65,8 @@ Copyright @copyright{} 2001 Free Software Foundation, Inc.
       section entitled ``GNU Free Documentation License''.
 
 @end titlepage
-
+@contents
+@page
 
 @ifnottex
 @node    Top,Using,,
@@ -319,6 +320,5 @@ SUCH DAMAGE.
 
 @printindex cp
 
-@contents
 @bye
 
diff --git a/libiberty/memchr.c b/libiberty/memchr.c
index f053be71dc5..f94bea018f5 100644
--- a/libiberty/memchr.c
+++ b/libiberty/memchr.c
@@ -2,12 +2,12 @@
 
 @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n})
 
-This function searches memory starting at @code{*}@var{src} for the
+This function searches memory starting at @code{*@var{s}} for the
 character @var{c}.  The search only ends with the first occurrence of
 @var{c}, or after @var{length} characters; in particular, a null
 character does not terminate the search.  If the character @var{c} is
-found within @var{length} characters of @code{*}@var{src}, a pointer
-to the character is returned. If @var{c} is not found, then NULL is
+found within @var{length} characters of @code{*@var{s}}, a pointer
+to the character is returned.  If @var{c} is not found, then @code{NULL} is
 returned.
 
 @end deftypefn
diff --git a/libiberty/putenv.c b/libiberty/putenv.c
index a655b59f8e3..58012fc83ad 100644
--- a/libiberty/putenv.c
+++ b/libiberty/putenv.c
@@ -22,7 +22,7 @@
 
 Uses @code{setenv} or @code{unsetenv} to put @var{string} into
 the environment or remove it.  If @var{string} is of the form
-@samp{name=value} the string is added; if no `=' is present the
+@samp{name=value} the string is added; if no @samp{=} is present the
 name is unset/removed.
 
 @end deftypefn
diff --git a/libiberty/rindex.c b/libiberty/rindex.c
index 9c25dff4dcc..ef9cdc59877 100644
--- a/libiberty/rindex.c
+++ b/libiberty/rindex.c
@@ -5,7 +5,7 @@
 @deftypefn Supplemental char* rindex (const char *@var{s}, int @var{c})
 
 Returns a pointer to the last occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  The use of @code{rindex} is
+the string @var{s}, or @code{NULL} if not found.  The use of @code{rindex} is
 deprecated in new programs in favor of @code{strrchr}.
 
 @end deftypefn
diff --git a/libiberty/strchr.c b/libiberty/strchr.c
index 6f327f2a241..1f71c5143d0 100644
--- a/libiberty/strchr.c
+++ b/libiberty/strchr.c
@@ -6,7 +6,7 @@
 @deftypefn Supplemental char* strchr (const char *@var{s}, int @var{c})
 
 Returns a pointer to the first occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  If @var{c} is itself the
+the string @var{s}, or @code{NULL} if not found.  If @var{c} is itself the
 null character, the results are undefined.
 
 @end deftypefn
diff --git a/libiberty/strdup.c b/libiberty/strdup.c
index a01cedfbee0..49233ba7aac 100644
--- a/libiberty/strdup.c
+++ b/libiberty/strdup.c
@@ -3,7 +3,7 @@
 @deftypefn Supplemental char* strdup (const char *@var{s})
 
 Returns a pointer to a copy of @var{s} in memory obtained from
-@code{malloc}, or NULL if insufficient memory was available.
+@code{malloc}, or @code{NULL} if insufficient memory was available.
 
 @end deftypefn
 
diff --git a/libiberty/strerror.c b/libiberty/strerror.c
index 046ffe6a1b7..37fbf4d0a8b 100644
--- a/libiberty/strerror.c
+++ b/libiberty/strerror.c
@@ -573,7 +573,7 @@ fact, the manual page for @code{perror(3C)} explicitly warns that one
 should check the size of the table (@code{sys_nerr}) before indexing
 it, since new error codes may be added to the system before they are
 added to the table.  Thus @code{sys_nerr} might be smaller than value
-implied by the largest @code{errno} value defined in @file{errno.h}.
+implied by the largest @code{errno} value defined in @code{<errno.h>}.
 
 We return the maximum value that can be used to obtain a meaningful
 symbolic name or message.
@@ -612,7 +612,7 @@ error number, then returns the string @samp{"Error @var{num}"}, where
 @var{num} is the error number.
 
 If the supplied error number is not a valid index into
-@code{sys_errlist}, returns NULL.
+@code{sys_errlist}, returns @code{NULL}.
 
 The returned string is only guaranteed to be valid only until the
 next call to @code{strerror}.
@@ -671,7 +671,7 @@ strerror (errnoval)
 
 Given an error number returned from a system call (typically returned
 in @code{errno}), returns a pointer to a string containing the
-symbolic name of that error number, as found in @file{errno.h}.
+symbolic name of that error number, as found in @code{<errno.h>}.
 
 If the supplied error number is within the valid range of indices for
 symbolic names, but no name is available for the particular error
@@ -679,7 +679,7 @@ number, then returns the string @samp{"Error @var{num}"}, where @var{num}
 is the error number.
 
 If the supplied error number is not within the range of valid
-indices, then returns NULL.
+indices, then returns @code{NULL}.
 
 The contents of the location pointed to are only guaranteed to be
 valid until the next call to @code{strerrno}.
@@ -729,7 +729,7 @@ strerrno (errnoval)
 
 @deftypefn Replacement int strtoerrno (const char *@var{name})
 
-Given the symbolic name of a error number (e.g., @code{EACCESS}), map it
+Given the symbolic name of a error number (e.g., @code{EACCES}), map it
 to an errno value.  If no translation is found, returns 0.
 
 @end deftypefn
diff --git a/libiberty/strrchr.c b/libiberty/strrchr.c
index 9dc31f2a159..bc380c4c5d3 100644
--- a/libiberty/strrchr.c
+++ b/libiberty/strrchr.c
@@ -6,7 +6,7 @@
 @deftypefn Supplemental char* strrchr (const char *@var{s}, int @var{c})
 
 Returns a pointer to the last occurrence of the character @var{c} in
-the string @var{s}, or NULL if not found.  If @var{c} is itself the
+the string @var{s}, or @code{NULL} if not found.  If @var{c} is itself the
 null character, the results are undefined.
 
 @end deftypefn
diff --git a/libiberty/strstr.c b/libiberty/strstr.c
index ffe1d10fc9e..470e04b1a76 100644
--- a/libiberty/strstr.c
+++ b/libiberty/strstr.c
@@ -7,7 +7,7 @@
 
 This function searches for the substring @var{sub} in the string
 @var{string}, not including the terminating null characters.  A pointer
-to the first occurrence of @var{sub} is returned, or NULL if the
+to the first occurrence of @var{sub} is returned, or @code{NULL} if the
 substring is absent.  If @var{sub} points to a string with zero
 length, the function returns @var{string}.
 
diff --git a/libiberty/strtod.c b/libiberty/strtod.c
index 2f0a0762fc3..874e5e52416 100644
--- a/libiberty/strtod.c
+++ b/libiberty/strtod.c
@@ -27,7 +27,7 @@ the executable file might be covered by the GNU General Public License. */
 @deftypefn Supplemental double strtod (const char *@var{string}, char **@var{endptr})
 
 This ANSI C function converts the initial portion of @var{string} to a
-@code{double}.  If @var{endptr} is not NULL, a pointer to the
+@code{double}.  If @var{endptr} is not @code{NULL}, a pointer to the
 character after the last character used in the conversion is stored in
 the location referenced by @var{endptr}.  If no conversion is
 performed, zero is returned and the value of @var{string} is stored in
diff --git a/libiberty/tmpnam.c b/libiberty/tmpnam.c
index 99615df7fe5..406878c49a3 100644
--- a/libiberty/tmpnam.c
+++ b/libiberty/tmpnam.c
@@ -5,7 +5,7 @@
 This function attempts to create a name for a temporary file, which
 will be a valid file name yet not exist when @code{tmpnam} checks for
 it.  @var{s} must point to a buffer of at least @code{L_tmpnam} bytes,
-or be NULL.  Use of this function creates a security risk, and it must
+or be @code{NULL}.  Use of this function creates a security risk, and it must
 not be used in new projects.  Use @code{mkstemp} instead.
 
 @end deftypefn
diff --git a/libiberty/vfork.c b/libiberty/vfork.c
index 7df7a226260..4aa5c21d427 100644
--- a/libiberty/vfork.c
+++ b/libiberty/vfork.c
@@ -3,7 +3,7 @@
 
 /*
 
-@deftypefn Supplemental int vfork ()
+@deftypefn Supplemental int vfork (void)
 
 Emulates @code{vfork} by calling @code{fork} and returning its value.
 
diff --git a/libiberty/xatexit.c b/libiberty/xatexit.c
index 6d983a894f4..728254b2c0d 100644
--- a/libiberty/xatexit.c
+++ b/libiberty/xatexit.c
@@ -11,7 +11,7 @@
 @deftypefun int xatexit (void (*@var{fn}) (void))
 
 Behaves as the standard @code{atexit} function, but with no limit on
-the number of registered functions.  Returns 0 on success, or -1 on
+the number of registered functions.  Returns 0 on success, or @minus{}1 on
 failure.  If you use @code{xatexit} to register functions, you must use
 @code{xexit} to terminate your program.
 
diff --git a/libiberty/xmalloc.c b/libiberty/xmalloc.c
index 3fc23a91c7a..bf0cf2d6ed4 100644
--- a/libiberty/xmalloc.c
+++ b/libiberty/xmalloc.c
@@ -29,13 +29,13 @@ a program to contain @code{#define malloc xmalloc} in its source.
 
 @end deftypefn
 
-@deftypefn Replacement void* xrealloc (void*, size_t)
+@deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size})
 Reallocate memory without fail.  This routine functions like @code{realloc},
 but will behave the same as @code{xmalloc} if memory cannot be found.
 
 @end deftypefn
 
-@deftypefn Replacement void* xcalloc (size_t, size_t)
+@deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize})
 
 Allocate memory without fail, and set it to zero.  This routine functions
 like @code{calloc}, but will behave the same as @code{xmalloc} if memory
diff --git a/libiberty/xstrerror.c b/libiberty/xstrerror.c
index 5e57f158202..9000d178f9c 100644
--- a/libiberty/xstrerror.c
+++ b/libiberty/xstrerror.c
@@ -7,7 +7,7 @@
 @deftypefn Replacement char* xstrerror (int @var{errnum})
 
 Behaves exactly like the standard @code{strerror} function, but
-will never return a NULL pointer.
+will never return a @code{NULL} pointer.
 
 @end deftypefn