diff options
Diffstat (limited to 'gold/configure.ac')
| -rw-r--r-- | gold/configure.ac | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gold/configure.ac b/gold/configure.ac index e8d5762..ad04fa6 100644 --- a/gold/configure.ac +++ b/gold/configure.ac @@ -325,6 +325,19 @@ AC_CHECK_HEADERS(ext/hash_map ext/hash_set) AC_CHECK_HEADERS(byteswap.h) AC_CHECK_FUNCS(mallinfo posix_fallocate) +# Use of ::std::tr1::unordered_map::rehash causes undefined symbols +# at link time with some versions of GCC. +AC_CACHE_CHECK([whether ::std::tr1::unordered_map::rehash is usable.], +[gold_cv_unordered_map_rehash], +[AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include <tr1/unordered_map> +void bar() { ::std::tr1::unordered_map<int, int> x; x.rehash(10); } +]])], [gold_cv_unordered_map_rehash=yes], [gold_cv_unordered_map_rehash=no])]) +if test "$gold_cv_unordered_map_rehash" = "yes"; then + AC_DEFINE(HAVE_TR1_UNORDERED_MAP_REHASH, 1, + [Define if ::std::tr1::unordered_map::rehash is usable]) +fi + # gcc 4.3.0 doesn't recognize the printf attribute on a template # function. Check for that. This is gcc bug 35546. This test can # probably be removed after the bug has been fixed for a while. |