* m4/include_next.m4 (gl_INCLUDE_NEXT): Define and AC_SUBST INCLUDE_NEXT. (gl_CHECK_NEXT_HEADERS): New macro. * m4/fcntl_h.m4 (gl_FCNTL_H): use gl_CHECK_NEXT_HEADERS instead of the obsolescent gl_ABSOLUTE_HEADER. * m4/float_h.m4 (gl_FLOAT_H): Likewise. * m4/inttypes.m4 (gl_INTTYPES_H): Likewise. * m4/math_h.m4 (gl_MATH_H): Likewise. * m4/search_h.m4 (gl_SEARCH_H): Likewise. * m4/signal_h.m4 (gl_SIGNAL_H): Likewise. * m4/stdint.m4 (gl_STDINT_H): Likewise. * m4/stdio_h.m4 (gl_STDIO_H): Likewise. * m4/stdlib_h.m4 (gl_STDLIB_H): Likewise. * m4/string_h.m4 (gl_HEADER_STRING_H_BODY): Likewise. * m4/sys_stat_h.m4 (gl_HEADER_SYS_STAT_H): Likewise. * m4/sys_time_h.m4 (gl_HEADER_SYS_TIME_H_BODY): Likewise. * m4/time_h.m4 (gl_HEADER_TIME_H_BODY): Likewise. * m4/unistd_h.m4 (gl_UNISTD_H): Likewise. * m4/wchar.m4 (gl_WCHAR_H): Likewise. * m4/wctype.m4 (gl_WCTYPE_H): Likewise. * m4/inttypes.m4 (gl_INTTYPES_H): Define _GL_JUST_INCLUDE_SYSTEM_INTTYPES_H to avoid the problem of unclean builds, since ABSOLUTE_INTTYPES_H is no longer being defined. * m4/stdint.m4 (gl_STDINT_H): Likewise, for _GL_JUST_INCLUDE_SYSTEM_STDINT_H. * lib/fcntl_.h: Use @INCLUDE_NEXT@ @NEXT_foo_H@ rather than @HAVE_INCLUDE_NEXT@ and @ABSOLUTE_foo_H@. * lib/float_.h: Likewise. * lib/inttypes_.h: Likewise. * lib/math_.h: Likewise. * lib/search_.h: Likewise. * lib/signal_.h: Likewise. * lib/stdint_.h: Likewise. * lib/stdio_.h: Likewise. * lib/stdlib_.h: Likewise. * lib/string_.h: Likewise. * lib/sys_stat_.h: Likewise. * lib/sys_time_.h: Likewise. * lib/time_.h: Likewise. * lib/unistd_.h: Likewise. * lib/wchar_.h: Likewise. * lib/wctype_.h: Likewise. * modules/fcntl (Depends-on): Depend on absolute-header, not include_next. (Makefile): Substitute INCLUDE_NEXT and NEXT_foo_H, not HAVE_INCLUDE_NEXT and ABSOLUTE_foo_H. * modules/float: Likewise. * modules/inttypes: Likewise. * modules/math: Likewise. * modules/search: Likewise. * modules/signal: Likewise. * modules/stdint: Likewise. * modules/stdio: Likewise. * modules/stdlib: Likewise. * modules/string: Likewise. * modules/sys_stat: Likewise. * modules/sys_time: Likewise. * modules/time: Likewise. * modules/unistd: Likewise. * modules/wchar: Likewise. * modules/wctype: Likewise. * modules/sys_stat: Change maintainer to "all". * modules/unistd: Likewise.

--- a/m4/sys_time_h.m4
+++ b/m4/sys_time_h.m4
@@ -18,17 +18,13 @@
 AC_DEFUN([gl_HEADER_SYS_TIME_H_BODY],
 [
   AC_REQUIRE([AC_C_RESTRICT])
-  AC_CHECK_HEADERS_ONCE([sys/time.h])
+  gl_CHECK_NEXT_HEADERS([sys/time.h])
 
   if test $ac_cv_header_sys_time_h = yes; then
-    gl_ABSOLUTE_HEADER([sys/time.h])
-    ABSOLUTE_SYS_TIME_H=\"$gl_cv_absolute_sys_time_h\"
     HAVE_SYS_TIME_H=1
   else
-    ABSOLUTE_SYS_TIME_H=\"no/such/file/sys/time.h\"
     HAVE_SYS_TIME_H=0
   fi
-  AC_SUBST([ABSOLUTE_SYS_TIME_H])
   AC_SUBST([HAVE_SYS_TIME_H])
 
   AC_CACHE_CHECK([for struct timeval], [gl_cv_sys_struct_timeval],