diff options
| -rw-r--r-- | configure.ac | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/configure.ac b/configure.ac index 5b5ad1d1a5bc..711983973f52 100644 --- a/configure.ac +++ b/configure.ac @@ -6136,17 +6136,23 @@ elif test "$GCC" = "yes"; then fi fi +dnl Test for temporarily incompatible libstdc++ 4.7.{0,1}, where +dnl <https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=179528> introduced +dnl an additional member _M_size into C++11 std::list towards 4.7.0 and +dnl <https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=189186> removed it +dnl again towards 4.7.2: if test $CPP_LIBRARY = GLIBCXX -a "$HAVE_CXX11" = TRUE; then AC_MSG_CHECKING([whether using C++11 causes libstdc++ 4.7.0/4.7.1 ABI breakage]) AC_LANG_PUSH([C++]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <list> -#if !defined(__GLIBCXX__) +#if !defined __GLIBCXX__ || (__GLIBCXX__ != 20120322 && __GLIBCXX__ != 20120614) + // according to <https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html>: + // GCC 4.7.0: 20120322 + // GCC 4.7.1: 20120614 + // and using a range check is not possible as the mapping between + // __GLIBCXX__ values and GCC versions is not monotonic /* ok */ -#elif __GLIBCXX__ < 20111004 -/* before breakage */ -#elif __GLIBCXX__ > 20120703 -/* after breakage */ #else abi broken #endif |