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--- a/src/core/abi.cc
+++ b/src/core/abi.cc
@@ -21,7 +21,11 @@
{
// are we compiled as 32- or 64-bit process ?
long sc = sysconf(LONG_BIT);
+#ifdef _SC_LONG_BIT
if(sc==-1) sc = sysconf(_SC_LONG_BIT);
+#else
+ if(sc==-1) sc = (CHAR_BIT * sizeof(long));
+#endif
if(sc!=-1) system.setWidth(sc);
pushd(PROC_SYS);
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