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configuring itself for largefile support. On these systems largefile
support breaks C++ compiles by defining away many of the C standard library
routines that should reside in namespace std::. In order to get around
problem first we have to check the largefile support macros. Later we will
use the macro SAH_LARGEFILE_BREAKS_CXX to check for the breakage. If
if breakage is found LARGEFILE_BREAKS_CXX is defined in config.h. This
define is checked in std_fixes.h and the appropriate functions are defined
in order to solve the problem. (These functions were already in place)
Because these defines affect the behavior of standard library headers,
std_fixes.h is being included from config.h
-Added AM_CPPFLAGS, AM_CFLAGS, and AM_CXXFLAGS (for flags common to all
compiles) so they will be defined in all Makefile.am files.
-Put #ifdef _cplusplus around the C++ specific items in std_fixes.h so it
may be included from C source files.
svn path=/trunk/boinc/; revision=5375
28 lines
827 B
Plaintext
28 lines
827 B
Plaintext
# SETI_BOINC is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 2, or (at your option) any later
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# version.
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AC_DEFUN([SAH_LARGEFILE_BREAKS_CXX],[
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AC_MSG_CHECKING([whether largefile support breaks C++])
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AC_LANG_PUSH(C++)
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([[
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#define CONFIG_TEST
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#include <iostream>
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]],
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[[
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std::cout << 1.0 << std::endl;
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]])],
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[tmp_res="no"],
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[AC_DEFINE([LARGEFILE_BREAKS_CXX],[1],
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["Define to 1 if largefile support causes missing symbols in C++"] )
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tmp_res="yes"
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sah_cxx_includes=`echo "#include \"$TOP_BUILD_DIR/lib/std_fixes.h\"" ; echo $sah_cxx_includes`
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]
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)
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AC_MSG_RESULT($tmp_res)
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AC_LANG_POP
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])
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