better check for issetugid

configure.ac

@@ -1,16 +1,6 @@
 AC_INIT([umem], [1.0], [], [umem])
 AM_INIT_AUTOMAKE([dist-bzip2])
 
-dnl AC_ARG_ENABLE([malloc-replacement],
-dnl               AS_HELP_STRING([--enable-malloc-replacement],
-dnl                              [Include implementations of malloc/free/etc. in libumem (default is no)]),
-dnl               [case "${enableval}" in
-dnl                 yes) malloc_replacement=true ;;
-dnl                 no)  malloc_replacement=false ;;
-dnl                 *) AC_MSG_ERROR(bad value ${enableval} for --enable-malloc-replacement) ;;
-dnl               esac],[malloc_replacement=false])
-dnl AM_CONDITIONAL(MALLOC_REPLACEMENT, test x$malloc_replacement = xtrue)
-
 AC_PROG_CC
 AM_PROG_AS
 AC_PROG_LIBTOOL
@@ -18,6 +8,7 @@ AC_PROG_LIBTOOL
 AC_C_INLINE
 
 AC_CHECK_HEADERS([sys/mman.h sys/sysmacros.h sys/time.h])
+AC_CHECK_FUNCS([issetugid])
 
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_FILES([Makefile Doxyfile umem.spec])

sol_compat.h

@@ -165,7 +165,7 @@ static INLINE uint_t ec_atomic_inc(uint_t *mem)
 
 #ifdef _WIN32
 #define issetugid()		  0
-#elif !defined(__FreeBSD__)
+#elif !HAVE_ISSETUGID
 #define issetugid()       (geteuid() == 0)
 #endif