Sync with gnulib

1 files changed, 50 insertions, 31 deletions

diff --git a/gl/m4/getloadavg.m4 b/gl/m4/getloadavg.m4
index c1547c74..015bcac2 100644
--- a/gl/m4/getloadavg.m4
+++ b/gl/m4/getloadavg.m4
@@ -1,7 +1,7 @@
 # Check for getloadavg.
 
 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2002, 2003,
-# 2006 Free Software Foundation, Inc.
+# 2006, 2008, 2009 Free Software Foundation, Inc.
 
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -13,7 +13,12 @@
 # gl_GETLOADAVG(LIBOBJDIR)
 # ------------------------
 AC_DEFUN([gl_GETLOADAVG],
-[gl_have_func=no # yes means we've found a way to get the load average.
+[AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+# Persuade glibc <stdlib.h> to declare getloadavg().
+AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+gl_have_func=no # yes means we've found a way to get the load average.
 
 # Make sure getloadavg.c is where it belongs, at configure-time.
 test -f "$srcdir/$1/getloadavg.c" ||
@@ -22,17 +27,17 @@ test -f "$srcdir/$1/getloadavg.c" ||
 gl_save_LIBS=$LIBS
 
 # Check for getloadavg, but be sure not to touch the cache variable.
-(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && gl_have_func=yes
+(AC_CHECK_FUNC([getloadavg], [exit 0], [exit 1])) && gl_have_func=yes
 
 # On HPUX9, an unprivileged user can get load averages through this function.
-AC_CHECK_FUNCS(pstat_getdynamic)
+AC_CHECK_FUNCS([pstat_getdynamic])
 
 # Solaris has libkstat which does not require root.
-AC_CHECK_LIB(kstat, kstat_open)
+AC_CHECK_LIB([kstat], [kstat_open])
 test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
 
 # AIX has libperfstat which does not require root
-AC_CHECK_LIB(perfstat, perfstat_cpu_total)
+AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
 test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
 
 # Some systems with -lutil have (and need) -lkvm as well, some do not.
@@ -40,12 +45,12 @@ test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
 # to get the right answer into the cache.
 # For kstat on solaris, we need libelf to force the definition of SVR4 below.
 if test $gl_have_func = no; then
-  AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
+  AC_CHECK_LIB([elf], [elf_begin], [LIBS="-lelf $LIBS"])
 fi
 if test $gl_have_func = no; then
-  AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
+  AC_CHECK_LIB([kvm], [kvm_open], [LIBS="-lkvm $LIBS"])
   # Check for the 4.4BSD definition of getloadavg.
-  AC_CHECK_LIB(util, getloadavg,
+  AC_CHECK_LIB([util], [getloadavg],
     [LIBS="-lutil $LIBS" gl_have_func=yes gl_cv_func_getloadavg_setgid=yes])
 fi
 
@@ -54,17 +59,17 @@ if test $gl_have_func = no; then
   # Since it is not a standard part of AIX, it might be installed locally.
   gl_getloadavg_LIBS=$LIBS
   LIBS="-L/usr/local/lib $LIBS"
-  AC_CHECK_LIB(getloadavg, getloadavg,
+  AC_CHECK_LIB([getloadavg], [getloadavg],
 	       [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_getloadavg_LIBS])
 fi
 
 # Make sure it is really in the library, if we think we found it,
 # otherwise set up the replacement function.
-AC_CHECK_FUNCS(getloadavg, [],
+AC_CHECK_FUNCS([getloadavg], [],
 	       [gl_PREREQ_GETLOADAVG])
 
 # Some definitions of getloadavg require that the program be installed setgid.
-AC_CACHE_CHECK(whether getloadavg requires setgid,
+AC_CACHE_CHECK([whether getloadavg requires setgid],
 	       gl_cv_func_getloadavg_setgid,
 [AC_EGREP_CPP([Yowza Am I SETGID yet],
 [#define CONFIGURING_GETLOADAVG
@@ -77,16 +82,16 @@ Yowza Am I SETGID yet
 	      gl_cv_func_getloadavg_setgid=no)])
 if test $gl_cv_func_getloadavg_setgid = yes; then
   NEED_SETGID=true
-  AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
+  AC_DEFINE([GETLOADAVG_PRIVILEGED], [1],
 	    [Define to 1 if the `getloadavg' function needs to be run setuid
 	     or setgid.])
 else
   NEED_SETGID=false
 fi
-AC_SUBST(NEED_SETGID)dnl
+AC_SUBST([NEED_SETGID])dnl
 
 if test $gl_cv_func_getloadavg_setgid = yes; then
-  AC_CACHE_CHECK(group of /dev/kmem, gl_cv_group_kmem,
+  AC_CACHE_CHECK([group of /dev/kmem], [gl_cv_group_kmem],
 [ # On Solaris, /dev/kmem is a symlink.  Get info on the real file.
   ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
   # If we got an error (system does not support symlinks), try without -L.
@@ -96,7 +101,7 @@ if test $gl_cv_func_getloadavg_setgid = yes; then
 	       s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\)  *.*/\1/
 	       / /s/.* //;p']`
 ])
-  AC_SUBST(KMEM_GROUP, $gl_cv_group_kmem)dnl
+  AC_SUBST([KMEM_GROUP], [$gl_cv_group_kmem])dnl
 fi
 if test "x$gl_save_LIBS" = x; then
   GETLOADAVG_LIBS=$LIBS
@@ -105,7 +110,21 @@ else
 fi
 LIBS=$gl_save_LIBS
 
-AC_SUBST(GETLOADAVG_LIBS)dnl
+AC_SUBST([GETLOADAVG_LIBS])dnl
+
+# Test whether the system declares getloadavg. Solaris has the function
+# but declares it in <sys/loadavg.h>, not <stdlib.h>.
+AC_CHECK_HEADERS([sys/loadavg.h])
+if test $ac_cv_header_sys_loadavg_h = yes; then
+  HAVE_SYS_LOADAVG_H=1
+else
+  HAVE_SYS_LOADAVG_H=0
+fi
+AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
+  [#if HAVE_SYS_LOADAVG_H
+   # include <sys/loadavg.h>
+   #endif
+   #include <stdlib.h>])
 ])# gl_GETLOADAVG
 
 
@@ -113,44 +132,44 @@ AC_SUBST(GETLOADAVG_LIBS)dnl
 # --------------------
 # Set up the AC_LIBOBJ replacement of `getloadavg'.
 AC_DEFUN([gl_PREREQ_GETLOADAVG],
-[AC_LIBOBJ(getloadavg)
-AC_DEFINE(C_GETLOADAVG, 1, [Define to 1 if using `getloadavg.c'.])
+[AC_LIBOBJ([getloadavg])
+AC_DEFINE([C_GETLOADAVG], [1], [Define to 1 if using `getloadavg.c'.])
 # Figure out what our getloadavg.c needs.
 gl_have_func=no
-AC_CHECK_HEADER(sys/dg_sys_info.h,
+AC_CHECK_HEADER([sys/dg_sys_info.h],
 [gl_have_func=yes
- AC_DEFINE(DGUX, 1, [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
- AC_CHECK_LIB(dgc, dg_sys_info)])
+ AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
+ AC_CHECK_LIB([dgc], [dg_sys_info])])
 
 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
 # uses stabs), but it is still SVR4.  We cannot check for <elf.h> because
 # Irix 4.0.5F has the header but not the library.
 if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
   gl_have_func=yes
-  AC_DEFINE(SVR4, 1, [Define to 1 on System V Release 4.])
+  AC_DEFINE([SVR4], [1], [Define to 1 on System V Release 4.])
 fi
 
 if test $gl_have_func = no; then
-  AC_CHECK_HEADER(inq_stats/cpustats.h,
+  AC_CHECK_HEADER([inq_stats/cpustats.h],
   [gl_have_func=yes
-   AC_DEFINE(UMAX, 1, [Define to 1 for Encore UMAX.])
-   AC_DEFINE(UMAX4_3, 1,
+   AC_DEFINE([UMAX], [1], [Define to 1 for Encore UMAX.])
+   AC_DEFINE([UMAX4_3], [1],
 	     [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
 	      instead of <sys/cpustats.h>.])])
 fi
 
 if test $gl_have_func = no; then
-  AC_CHECK_HEADER(sys/cpustats.h,
-  [gl_have_func=yes; AC_DEFINE(UMAX)])
+  AC_CHECK_HEADER([sys/cpustats.h],
+  [gl_have_func=yes; AC_DEFINE([UMAX])])
 fi
 
 if test $gl_have_func = no; then
-  AC_CHECK_HEADERS(mach/mach.h)
+  AC_CHECK_HEADERS([mach/mach.h])
 fi
 
-AC_CHECK_HEADERS(nlist.h,
+AC_CHECK_HEADERS([nlist.h],
 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
-		  [AC_DEFINE(NLIST_NAME_UNION, 1,
+		  [AC_DEFINE([NLIST_NAME_UNION], [1],
 			     [Define to 1 if your `struct nlist' has an
 			      `n_un' member.  Obsolete, depend on
 			      `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],