diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 6f5568bd2..4b079facf 100644 --- a/configure.ac +++ b/configure.ac @@ -676,6 +676,19 @@ if test "$enable_profiling" = yes; then CVC4LDFLAGS="${CVC4LDFLAGS:+$CVC4LDFLAGS }-pg" fi +# Check to see if this version/architecture of GNU C++ explicitly +# instantiates __gnu_cxx::hash<uint64_t> or not. Some do, some don't. +# See src/util/hash.h. +AC_MSG_CHECKING([whether __gnu_cxx::hash<uint64_t> is already specialized]) +AC_LANG_PUSH([C++]) +AC_COMPILE_IFELSE(AC_LANG_SOURCE([ +#include <stdint.h> +#include <ext/hash_map> +namespace __gnu_cxx { template<> struct hash<uint64_t> {}; }]), + [AC_MSG_RESULT([no]); CVC4CPPFLAGS="${CVC4CPPFLAGS:+$CVC4CPPFLAGS }-DCVC4_NEED_HASH_UINT64_T"], + [AC_MSG_RESULT([yes])]) +AC_LANG_POP([C++]) + # Check for ANTLR runantlr script (defined in config/antlr.m4) AC_PROG_ANTLR |