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Fix for bug #31254: "Max_data_length" truncated / reported wrong

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(compiler issue ?)

Problem:

Improper compile-time flags on AIX prevented use of files > 2 GB. This
resulted in Max_data_length being truncated to 2 GB by MyISAM code.

Solution:

Reverted large-file changes from the fix for bug10776. We need to define
_LARGE_FILES on AIX to have support for files > 2 GB.

 Since _LARGE_FILE_API is incompatible with _LARGE_FILES and may be
automatically defined by including standards.h, we also need a
workaround to avoid this conflict.


config/ac-macros/large_file.m4:
  Reverted large-file changes from the fix for bug10776. We need to define
  _LARGE_FILES on AIX to have support for files > 2 GB.
include/my_global.h:
  _LARGE_FILE_API is defined in standards.h that is automatically included
  by at least some C++ compilers on AIX. Since it is also incompatible
  with _LARGE_FILES which is required for POSIX IO calls to be
  largefile-safe, the only workaround is to explicitely #undef
  _LARGE_FILE_API.
This commit is contained in:
unknown 2007-10-12 14:03:51 +04:00
commit 65a32e834f
2 changed files with 14 additions and 2 deletions
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11
config/ac-macros/large_file.m4
View file

@ -128,8 +128,15 @@ AC_DEFUN([MYSQL_SYS_LARGEFILE],
ac_cv_sys_largefile_source=1 ;;
esac])
# AIX 4.2 and later -- do nothing, include standards.h instead.
# this goes for both GNU and IBM C and C++ compilers.
AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES,
ac_cv_sys_large_files,
[Large files support on AIX-style hosts.],
[case "$host_os" in
# Large file support on AIX is available starting from version 4.2
# Tested only on 5.2 and up
aix4.[2-9]* | aix4.1[0-9]* | aix[5-9].* | aix[1-9][0-9]*)
ac_cv_sys_large_files=1 ;;
esac])
fi
])