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Add a check for miscompiled long long when using -pedantic. Bug #19431 r=waterson

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cls%seawood.org 2000-01-15 01:39:44 +00:00
parent 00f4966324
commit e8b90cc156
1 changed files with 24 additions and 2 deletions
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26
configure.in
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@ -2508,8 +2508,30 @@ MOZ_ARG_DISABLE_BOOL(pedantic,
[ --disable-pedantic Issue all warnings demanded by strict ANSI C ],
_PEDANTIC= )
if test "$_PEDANTIC"; then
_WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} ${_COMPILER_PREFIX}-pedantic"
_WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} ${_COMPILER_PREFIX}-pedantic"
AC_LANG_CPLUSPLUS
_SAVE_CXXFLAGS=$CXXFLAGS
CXXFLAGS="$CXXFLAGS ${_WARNING_CXXFLAGS} ${_COMPILER_PREFIX}-pedantic"
AC_MSG_CHECKING([whether C++ compiler has -pedantic long long bug])
AC_TRY_RUN([ int main () {
if (sizeof(long long) != 8) { return 1; }
return 0; } ],
result="no", result="yes", result="maybe" )
AC_MSG_RESULT([$result])
CXXFLAGS="$_SAVE_CXXFLAGS"
AC_LANG_C
case "$result" in
no)
_WARNINGS_CFLAGS="${_WARNINGS_CFLAGS} ${_COMPILER_PREFIX}-pedantic"
_WARNINGS_CXXFLAGS="${_WARNINGS_CXXFLAGS} ${_COMPILER_PREFIX}-pedantic"
;;
yes)
AC_MSG_ERROR([Your compiler appears to have a known bug where long long is miscompiled when using -pedantic. Reconfigure using --disable-pedantic. ])
;;
maybe)
AC_MSG_WARN([Cannot test -pedantic long long bug when cross-compiling.])
;;
esac
fi
dnl pass -Wno-long-long to the compiler