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Diffstat (limited to 'erts/configure.in')
| -rw-r--r-- | erts/configure.in | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/erts/configure.in b/erts/configure.in index 85e167b93b..508e99a415 100644 --- a/erts/configure.in +++ b/erts/configure.in @@ -3774,6 +3774,39 @@ dnl LM_FIND_EMU_CC dnl +dnl Test whether code pointers are always short (32 bits). +dnl + +AC_MSG_CHECKING([whether the code model is small]) +saved_LDFLAGS="$LDFLAGS" +LDFLAGS="$LDFLAGS $HIPEBEAMLDFLAGS" +AC_TRY_RUN([ + #include <stdlib.h> + int main() { + if ((unsigned long long)&main < (1ull << 32)) { + exit(0); + } + exit(1); + } +], +erl_code_model_small=yes, +erl_code_model_small=no, +erl_code_model_small=no) +AC_MSG_RESULT([$erl_code_model_small]) +LDFLAGS="$saved_LDFLAGS" +case $erl_code_model_small in + yes) + AC_DEFINE(CODE_MODEL_SMALL,[1], + [Define if the code model is small (code fits below 2Gb)]) + CODE_MODEL=small + ;; + no) + CODE_MODEL=unknown + ;; +esac +AC_SUBST(CODE_MODEL) + +dnl dnl DTrace & LTTNG dnl case $DYNAMIC_TRACE_FRAMEWORK in |