Add mlock check to Makefile and cmake builds

CMakeLists.txt

@@ -165,6 +165,7 @@ check_symbol_exists( lrintf "math.h" HAVE_LRINTF )
 check_symbol_exists( lround "math.h" HAVE_LROUND )
 check_symbol_exists( lstat "sys/stat.h" HAVE_LSTAT )
 check_symbol_exists( memcpy "string.h" HAVE_MEMCPY )
+check_symbol_exists( mlock "sys/mman.h" HAVE_MLOCK )
 check_symbol_exists( pipe "unistd.h" HAVE_PIPE )
 check_symbol_exists( posix_fadvise "fcntl.h" HAVE_POSIX_FADVISE )
 check_symbol_exists( posix_memalign "stdlib.h" HAVE_POSIX_MEMALIGN )

configure

@@ -633,6 +633,7 @@ ac_includes_default="\
 ac_default_prefix=/usr/local
 ac_header_list=
 enable_option_checking=no
+ac_func_list=
 ac_subst_vars='am__EXEEXT_FALSE
 am__EXEEXT_TRUE
 LTLIBOBJS
@@ -2806,6 +2807,7 @@ fi
 gt_needs="$gt_needs "
 as_fn_append ac_header_list " alloca.h"
 as_fn_append ac_header_list " libudev.h"
+as_fn_append ac_func_list " mlock"
 # Check that the precious variables saved in the cache have kept the same
 # value.
 ac_cache_corrupted=false
@@ -24194,6 +24196,24 @@ fi
 
 
 
+
+
+  for ac_func in $ac_func_list
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_cxx_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+done
+
+
+
+
+
 if [ "$use_ladspa" = "yes" ] ; then
 
 $as_echo "#define USE_LADSPA 1" >>confdefs.h

configure.ac

@@ -680,6 +680,8 @@ dnl Check for lrint/lrintf
 AC_C99_FUNC_LRINT
 AC_C99_FUNC_LRINTF
 
+dnl Check for memory locking
+AC_CHECK_FUNCS_ONCE(mlock)
 
 if [[ "$use_ladspa" = "yes" ]] ; then
    AC_DEFINE(USE_LADSPA, 1,

src/configtemplate.h

@@ -65,6 +65,9 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
+/* Define to 1 if you have the `mlock' function. */
+#undef HAVE_MLOCK
+
 /* Define to 1 if you have the `nanosleep' function. */
 #undef HAVE_NANOSLEEP