Explicitly test for malloc_trim() in configure

src/common/autoconfig.h.in

@@ -45,6 +45,9 @@
 /* Define to 1 if you have the `z' library (-lz). */
 #undef HAVE_LIBZ
 
+/* Define to 1 if you have the `malloc_trim' function. */
+#undef HAVE_MALLOC_TRIM
+
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 

src/configure.ac

@@ -37,7 +37,7 @@ AC_SYS_LARGEFILE
 # OpenBSD needs sys/param.h for mount.h to compile
 AC_CHECK_HEADERS([sys/param.h, spawn.h])
 
-AC_CHECK_FUNCS([posix_spawn setrlimit kqueue vsnprintf])
+AC_CHECK_FUNCS([posix_spawn setrlimit kqueue vsnprintf malloc_trim])
 
 if test "x$ac_cv_func_posix_spawn" = xyes; then :
    AC_ARG_ENABLE(posix_spawn,

src/internfile/mh_xslt.cpp

@@ -52,9 +52,9 @@ public:
 			// malloc_trim() and mallopt() doc seems to be a bit
 			// misleading, there is probably a frag size under which
 			// free() does not try to malloc_trim() at all
-#ifndef _WIN32
+#ifdef HAVE_MALLOC_TRIM
 			malloc_trim(0);
-#endif
+#endif /* HAVE_MALLOC_TRIM */
         }
     }