m4/stdio_h.m4

   1 # stdio_h.m4 serial 26
   2 dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
   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 AC_DEFUN([gl_STDIO_H],
   8 [
   9   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
  10   AC_REQUIRE([AC_C_INLINE])
  11   gl_CHECK_NEXT_HEADERS([stdio.h])
  12   dnl No need to create extra modules for these functions. Everyone who uses
  13   dnl <stdio.h> likely needs them.
  14   GNULIB_FPRINTF=1
  15   GNULIB_PRINTF=1
  16   GNULIB_VFPRINTF=1
  17   GNULIB_VPRINTF=1
  18   GNULIB_FPUTC=1
  19   GNULIB_PUTC=1
  20   GNULIB_PUTCHAR=1
  21   GNULIB_FPUTS=1
  22   GNULIB_PUTS=1
  23   GNULIB_FWRITE=1
  24   dnl This ifdef is just an optimization, to avoid performing a configure
  25   dnl check whose result is not used. It does not make the test of
  26   dnl GNULIB_STDIO_H_SIGPIPE or GNULIB_SIGPIPE redundant.
  27   m4_ifdef([gl_SIGNAL_SIGPIPE], [
  28     gl_SIGNAL_SIGPIPE
  29     if test $gl_cv_header_signal_h_SIGPIPE != yes; then
  30       REPLACE_STDIO_WRITE_FUNCS=1
  31       AC_LIBOBJ([stdio-write])
  32     fi
  33   ])
  34
  35   dnl Check for declarations of anything we want to poison if the
  36   dnl corresponding gnulib module is not in use, and which is not
  37   dnl guaranteed by C89.
  38   gl_WARN_ON_USE_PREPARE([[#include <stdio.h>
  39     ]], [dprintf fpurge fseeko ftello getdelim getline popen renameat
  40     snprintf vdprintf vsnprintf])
  41 ])
  42
  43 AC_DEFUN([gl_STDIO_MODULE_INDICATOR],
  44 [
  45   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  46   AC_REQUIRE([gl_STDIO_H_DEFAULTS])
  47   GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
  48   dnl Define it also as a C macro, for the benefit of the unit tests.
  49   gl_MODULE_INDICATOR([$1])
  50 ])
  51
  52 AC_DEFUN([gl_STDIO_H_DEFAULTS],
  53 [
  54   GNULIB_DPRINTF=0;              AC_SUBST([GNULIB_DPRINTF])
  55   GNULIB_FCLOSE=0;               AC_SUBST([GNULIB_FCLOSE])
  56   GNULIB_FFLUSH=0;               AC_SUBST([GNULIB_FFLUSH])
  57   GNULIB_FOPEN=0;                AC_SUBST([GNULIB_FOPEN])
  58   GNULIB_FPRINTF=0;              AC_SUBST([GNULIB_FPRINTF])
  59   GNULIB_FPRINTF_POSIX=0;        AC_SUBST([GNULIB_FPRINTF_POSIX])
  60   GNULIB_FPURGE=0;               AC_SUBST([GNULIB_FPURGE])
  61   GNULIB_FPUTC=0;                AC_SUBST([GNULIB_FPUTC])
  62   GNULIB_FPUTS=0;                AC_SUBST([GNULIB_FPUTS])
  63   GNULIB_FREOPEN=0;              AC_SUBST([GNULIB_FREOPEN])
  64   GNULIB_FSEEK=0;                AC_SUBST([GNULIB_FSEEK])
  65   GNULIB_FSEEKO=0;               AC_SUBST([GNULIB_FSEEKO])
  66   GNULIB_FTELL=0;                AC_SUBST([GNULIB_FTELL])
  67   GNULIB_FTELLO=0;               AC_SUBST([GNULIB_FTELLO])
  68   GNULIB_FWRITE=0;               AC_SUBST([GNULIB_FWRITE])
  69   GNULIB_GETDELIM=0;             AC_SUBST([GNULIB_GETDELIM])
  70   GNULIB_GETLINE=0;              AC_SUBST([GNULIB_GETLINE])
  71   GNULIB_OBSTACK_PRINTF=0;       AC_SUBST([GNULIB_OBSTACK_PRINTF])
  72   GNULIB_OBSTACK_PRINTF_POSIX=0; AC_SUBST([GNULIB_OBSTACK_PRINTF_POSIX])
  73   GNULIB_PERROR=0;               AC_SUBST([GNULIB_PERROR])
  74   GNULIB_POPEN=0;                AC_SUBST([GNULIB_POPEN])
  75   GNULIB_PRINTF=0;               AC_SUBST([GNULIB_PRINTF])
  76   GNULIB_PRINTF_POSIX=0;         AC_SUBST([GNULIB_PRINTF_POSIX])
  77   GNULIB_PUTC=0;                 AC_SUBST([GNULIB_PUTC])
  78   GNULIB_PUTCHAR=0;              AC_SUBST([GNULIB_PUTCHAR])
  79   GNULIB_PUTS=0;                 AC_SUBST([GNULIB_PUTS])
  80   GNULIB_REMOVE=0;               AC_SUBST([GNULIB_REMOVE])
  81   GNULIB_RENAME=0;               AC_SUBST([GNULIB_RENAME])
  82   GNULIB_RENAMEAT=0;             AC_SUBST([GNULIB_RENAMEAT])
  83   GNULIB_SNPRINTF=0;             AC_SUBST([GNULIB_SNPRINTF])
  84   GNULIB_SPRINTF_POSIX=0;        AC_SUBST([GNULIB_SPRINTF_POSIX])
  85   GNULIB_STDIO_H_SIGPIPE=0;      AC_SUBST([GNULIB_STDIO_H_SIGPIPE])
  86   GNULIB_VASPRINTF=0;            AC_SUBST([GNULIB_VASPRINTF])
  87   GNULIB_VDPRINTF=0;             AC_SUBST([GNULIB_VDPRINTF])
  88   GNULIB_VFPRINTF=0;             AC_SUBST([GNULIB_VFPRINTF])
  89   GNULIB_VFPRINTF_POSIX=0;       AC_SUBST([GNULIB_VFPRINTF_POSIX])
  90   GNULIB_VPRINTF=0;              AC_SUBST([GNULIB_VPRINTF])
  91   GNULIB_VPRINTF_POSIX=0;        AC_SUBST([GNULIB_VPRINTF_POSIX])
  92   GNULIB_VSNPRINTF=0;            AC_SUBST([GNULIB_VSNPRINTF])
  93   GNULIB_VSPRINTF_POSIX=0;       AC_SUBST([GNULIB_VSPRINTF_POSIX])
  94   dnl Assume proper GNU behavior unless another module says otherwise.
  95   HAVE_DECL_FPURGE=1;            AC_SUBST([HAVE_DECL_FPURGE])
  96   HAVE_DECL_GETDELIM=1;          AC_SUBST([HAVE_DECL_GETDELIM])
  97   HAVE_DECL_GETLINE=1;           AC_SUBST([HAVE_DECL_GETLINE])
  98   HAVE_DECL_OBSTACK_PRINTF=1;    AC_SUBST([HAVE_DECL_OBSTACK_PRINTF])
  99   HAVE_DECL_SNPRINTF=1;          AC_SUBST([HAVE_DECL_SNPRINTF])
 100   HAVE_DECL_VSNPRINTF=1;         AC_SUBST([HAVE_DECL_VSNPRINTF])
 101   HAVE_DPRINTF=1;                AC_SUBST([HAVE_DPRINTF])
 102   HAVE_RENAMEAT=1;               AC_SUBST([HAVE_RENAMEAT])
 103   HAVE_VASPRINTF=1;              AC_SUBST([HAVE_VASPRINTF])
 104   HAVE_VDPRINTF=1;               AC_SUBST([HAVE_VDPRINTF])
 105   REPLACE_DPRINTF=0;             AC_SUBST([REPLACE_DPRINTF])
 106   REPLACE_FCLOSE=0;              AC_SUBST([REPLACE_FCLOSE])
 107   REPLACE_FFLUSH=0;              AC_SUBST([REPLACE_FFLUSH])
 108   REPLACE_FOPEN=0;               AC_SUBST([REPLACE_FOPEN])
 109   REPLACE_FPRINTF=0;             AC_SUBST([REPLACE_FPRINTF])
 110   REPLACE_FPURGE=0;              AC_SUBST([REPLACE_FPURGE])
 111   REPLACE_FREOPEN=0;             AC_SUBST([REPLACE_FREOPEN])
 112   REPLACE_FSEEK=0;               AC_SUBST([REPLACE_FSEEK])
 113   REPLACE_FSEEKO=0;              AC_SUBST([REPLACE_FSEEKO])
 114   REPLACE_FTELL=0;               AC_SUBST([REPLACE_FTELL])
 115   REPLACE_FTELLO=0;              AC_SUBST([REPLACE_FTELLO])
 116   REPLACE_GETDELIM=0;            AC_SUBST([REPLACE_GETDELIM])
 117   REPLACE_GETLINE=0;             AC_SUBST([REPLACE_GETLINE])
 118   REPLACE_OBSTACK_PRINTF=0;      AC_SUBST([REPLACE_OBSTACK_PRINTF])
 119   REPLACE_PERROR=0;              AC_SUBST([REPLACE_PERROR])
 120   REPLACE_POPEN=0;               AC_SUBST([REPLACE_POPEN])
 121   REPLACE_PRINTF=0;              AC_SUBST([REPLACE_PRINTF])
 122   REPLACE_REMOVE=0;              AC_SUBST([REPLACE_REMOVE])
 123   REPLACE_RENAME=0;              AC_SUBST([REPLACE_RENAME])
 124   REPLACE_RENAMEAT=0;            AC_SUBST([REPLACE_RENAMEAT])
 125   REPLACE_SNPRINTF=0;            AC_SUBST([REPLACE_SNPRINTF])
 126   REPLACE_SPRINTF=0;             AC_SUBST([REPLACE_SPRINTF])
 127   REPLACE_STDIO_WRITE_FUNCS=0;   AC_SUBST([REPLACE_STDIO_WRITE_FUNCS])
 128   REPLACE_VASPRINTF=0;           AC_SUBST([REPLACE_VASPRINTF])
 129   REPLACE_VDPRINTF=0;            AC_SUBST([REPLACE_VDPRINTF])
 130   REPLACE_VFPRINTF=0;            AC_SUBST([REPLACE_VFPRINTF])
 131   REPLACE_VPRINTF=0;             AC_SUBST([REPLACE_VPRINTF])
 132   REPLACE_VSNPRINTF=0;           AC_SUBST([REPLACE_VSNPRINTF])
 133   REPLACE_VSPRINTF=0;            AC_SUBST([REPLACE_VSPRINTF])
 134 ])
 135
 136 dnl Code shared by fseeko and ftello.  Determine if large files are supported,
 137 dnl but stdin does not start as a large file by default.
 138 AC_DEFUN([gl_STDIN_LARGE_OFFSET],
 139   [
 140     AC_CACHE_CHECK([whether stdin defaults to large file offsets],
 141       [gl_cv_var_stdin_large_offset],
 142       [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]],
 143 [[#if defined __SL64 && defined __SCLE /* cygwin */
 144   /* Cygwin 1.5.24 and earlier fail to put stdin in 64-bit mode, making
 145      fseeko/ftello needlessly fail.  This bug was fixed in 1.5.25, and
 146      it is easier to do a version check than building a runtime test.  */
 147 # include <cygwin/version.h>
 148 # if CYGWIN_VERSION_DLL_COMBINED < CYGWIN_VERSION_DLL_MAKE_COMBINED (1005, 25)
 149   choke me
 150 # endif
 151 #endif]])],
 152         [gl_cv_var_stdin_large_offset=yes],
 153         [gl_cv_var_stdin_large_offset=no])])
 154 ])