gl_CHECK_NEXT_HEADERS implies AC_CHECK_HEADERS_ONCE

[pspp] / ChangeLog

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+2011-01-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+       gl_CHECK_NEXT_HEADERS implies AC_CHECK_HEADERS_ONCE
+       * m4/include_next.m4 (gl_CHECK_HEXT_HEADERS): Document this.
+       * m4/getopt.m4 (gl_GETOPT_CHECK_HEADERS): Don't bother to invoke
+       AC_CHECK_HEADERS_ONCE on a header that we also invoke
+       gl_CHECK_NEXT_HEADERS on, since the latter invokes the former.
+       * m4/netdb_h.m4 (gl_HEADER_NETDB): Likewise.
+       * m4/pthread.m4 (gl_PTHREAD_CHECK): Likewise.
+       * m4/sched_h.m4 (gl_SCHED_H): Likewise.
+       * m4/search_h.m4 (gl_SEARCH_H): Likewise.
+       * m4/spawn_h.m4 (gl_SPAWN_H): Likewise.
+       * m4/sys_file_h.m4 (gl_HEADER_SYS_FILE_H): Likewise.
+       * m4/sys_select_h.m4 (gl_HEADER_SYS_SELECT): Likewise.
+       * m4/sys_times_h.m4 (gl_SYS_TIMES_H): Likewise.
+       * m4/sys_utsname_h.m4 (gl_SYS_UTSNAME_H): Likewise.
+       * m4/termios_h.m4 (gl_TERMIOS_H): Likewise.
+       * m4/unistd_h.m4 (gl_UNISTD_H): Likewise.
+       * m4/wchar_h.m4 (gl_WCHAR_H): Likewise.
+       * m4/wctype_h.m4 (gl_WCTYPE_H): Likewise.
+
 2011-01-21  Eric Blake  <eblake@redhat.com>
 
        maintainer-makefile: work with older git for submodule check