diff options
Diffstat (limited to 'm4/largefile.m4')
| -rw-r--r-- | m4/largefile.m4 | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/m4/largefile.m4 b/m4/largefile.m4 index 790f7c0a..bec7cd13 100644 --- a/m4/largefile.m4 +++ b/m4/largefile.m4 @@ -1,6 +1,6 @@ # Enable large files on systems where this is not the default. -# Copyright 1992-1996, 1998-2017 Free Software Foundation, Inc. +# Copyright 1992-1996, 1998-2018 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. @@ -126,9 +126,24 @@ AC_DEFUN([gl_LARGEFILE], else WINDOWS_64_BIT_OFF_T=0 fi - dnl But all native Windows platforms (including mingw64) have a 32-bit - dnl st_size member in 'struct stat'. - WINDOWS_64_BIT_ST_SIZE=1 + dnl Some mingw versions define, if _FILE_OFFSET_BITS=64, 'struct stat' + dnl to 'struct _stat32i64' or 'struct _stat64' (depending on + dnl _USE_32BIT_TIME_T), which has a 32-bit st_size member. + AC_CACHE_CHECK([for 64-bit st_size], [gl_cv_member_st_size_64], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[#include <sys/types.h> + struct stat buf; + int verify_st_size_size[sizeof (buf.st_size) >= 8 ? 1 : -1]; + ]], + [[]])], + [gl_cv_member_st_size_64=yes], [gl_cv_member_st_size_64=no]) + ]) + if test $gl_cv_member_st_size_64 = no; then + WINDOWS_64_BIT_ST_SIZE=1 + else + WINDOWS_64_BIT_ST_SIZE=0 + fi ;; *) dnl Nothing to do on gnulib's side. |