Mercurial > hg > octave-jordi > gnulib-hg
annotate m4/fcntl_h.m4 @ 11482:5ff04014c57f
Tweak last commit.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Tue, 14 Apr 2009 21:31:30 +0200 |
| parents | 2e168b9fc9aa |
| children | d1047ae4b8d5 |
| rev | line source |
|---|---|
| 7225 | 1 # Configure fcntl.h. |
|
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f6cba5a556ce
many *.m4 files: improve m4 quoting
Jim Meyering <meyering@redhat.com>
parents:
9299
diff
changeset
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2 dnl Copyright (C) 2006, 2007, 2009 Free Software Foundation, Inc. |
| 7225 | 3 dnl This file is free software; the Free Software Foundation |
| 4 dnl gives unlimited permission to copy and/or distribute it, | |
| 5 dnl with or without modifications, as long as this notice is preserved. | |
| 6 | |
| 7 dnl Written by Paul Eggert. | |
| 8 | |
| 9 AC_DEFUN([gl_FCNTL_H], | |
| 10 [ | |
| 11482 | 11 AC_REQUIRE([gl_FCNTL_H_DEFAULTS]) |
| 12 dnl Persuade glibc <fcntl.h> to define O_NOATIME and O_NOFOLLOW. | |
|
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Make fcntl module detect O_NOATIME, O_NOFOLLOW on GNU/Linux.
Ben Pfaff <blp@cs.stanford.edu>
parents:
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diff
changeset
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13 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
|
11007
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many *.m4 files: improve m4 quoting
Jim Meyering <meyering@redhat.com>
parents:
9299
diff
changeset
|
14 AC_CACHE_CHECK([for working fcntl.h], [gl_cv_header_working_fcntl_h], |
| 7225 | 15 [AC_RUN_IFELSE( |
| 16 [AC_LANG_PROGRAM( | |
| 17 [[#include <sys/types.h> | |
| 18 #include <sys/stat.h> | |
| 19 #include <unistd.h> | |
| 20 #include <fcntl.h> | |
| 7408 | 21 #ifndef O_NOATIME |
| 22 #define O_NOATIME 0 | |
| 23 #endif | |
| 7225 | 24 #ifndef O_NOFOLLOW |
| 25 #define O_NOFOLLOW 0 | |
| 26 #endif | |
| 27 static int const constants[] = | |
| 28 { | |
| 29 O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND, | |
| 30 O_NONBLOCK, O_SYNC, O_ACCMODE, O_RDONLY, O_RDWR, O_WRONLY | |
| 31 }; | |
| 32 ]], | |
| 7408 | 33 [[ |
| 34 int status = !constants; | |
| 35 { | |
| 36 static char const sym[] = "conftest.sym"; | |
| 37 if (symlink (".", sym) != 0 | |
| 38 || close (open (sym, O_RDONLY | O_NOFOLLOW)) == 0) | |
| 39 status |= 32; | |
| 40 } | |
| 41 { | |
| 42 static char const file[] = "confdefs.h"; | |
| 43 int fd = open (file, O_RDONLY | O_NOATIME); | |
| 44 char c; | |
| 45 struct stat st0, st1; | |
| 46 if (fd < 0 | |
| 47 || fstat (fd, &st0) != 0 | |
| 48 || sleep (1) != 0 | |
| 49 || read (fd, &c, 1) != 1 | |
| 50 || close (fd) != 0 | |
| 51 || stat (file, &st1) != 0 | |
|
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* m4/fcntl_h.m4 (gl_FCNTL_H): Test the atime, not the mtime.
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
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52 || st0.st_atime != st1.st_atime) |
| 7408 | 53 status |= 64; |
| 54 } | |
| 55 return status;]])], | |
| 7225 | 56 [gl_cv_header_working_fcntl_h=yes], |
| 7408 | 57 [case $? in #( |
| 58 32) gl_cv_header_working_fcntl_h='no (bad O_NOFOLLOW)';; #( | |
| 59 64) gl_cv_header_working_fcntl_h='no (bad O_NOATIME)';; #( | |
| 60 96) gl_cv_header_working_fcntl_h='no (bad O_NOATIME, O_NOFOLLOW)';; #( | |
| 61 *) gl_cv_header_working_fcntl_h='no';; | |
| 62 esac], | |
| 7225 | 63 [gl_cv_header_working_fcntl_h=cross-compiling])]) |
| 64 | |
| 7408 | 65 case $gl_cv_header_working_fcntl_h in #( |
| 66 *O_NOATIME* | no | cross-compiling) ac_val=0;; #( | |
| 67 *) ac_val=1;; | |
| 68 esac | |
| 69 AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOATIME], [$ac_val], | |
| 70 [Define to 1 if O_NOATIME works.]) | |
| 71 | |
| 72 case $gl_cv_header_working_fcntl_h in #( | |
| 73 *O_NOFOLLOW* | no | cross-compiling) ac_val=0;; #( | |
| 74 *) ac_val=1;; | |
| 75 esac | |
| 76 AC_DEFINE_UNQUOTED([HAVE_WORKING_O_NOFOLLOW], [$ac_val], | |
| 77 [Define to 1 if O_NOFOLLOW works.]) | |
| 7225 | 78 |
|
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* m4/include_next.m4 (gl_INCLUDE_NEXT): Define and AC_SUBST
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
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79 gl_CHECK_NEXT_HEADERS([fcntl.h]) |
| 7225 | 80 FCNTL_H='fcntl.h' |
| 81 AC_SUBST([FCNTL_H]) | |
| 82 ]) | |
| 9299 | 83 |
| 84 AC_DEFUN([gl_FCNTL_MODULE_INDICATOR], | |
| 85 [ | |
| 86 dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
| 87 AC_REQUIRE([gl_FCNTL_H_DEFAULTS]) | |
| 88 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1 | |
| 89 ]) | |
| 90 | |
| 91 AC_DEFUN([gl_FCNTL_H_DEFAULTS], | |
| 92 [ | |
| 93 GNULIB_OPEN=0; AC_SUBST([GNULIB_OPEN]) | |
| 94 dnl Assume proper GNU behavior unless another module says otherwise. | |
| 95 REPLACE_OPEN=0; AC_SUBST([REPLACE_OPEN]) | |
| 96 ]) |