- OSX portability, detect if sbrk is deprecated.

git-svn-id: file:///svn/unbound/trunk@3582 be551aaa-1e26-0410-a405-d3ace91eadb9

config.h.in

@@ -293,7 +293,7 @@
 /* Define to 1 if you have the `recvmsg' function. */
 #undef HAVE_RECVMSG
 
-/* Define to 1 if you have the `sbrk' function. */
+/* define if you have the sbrk() call */
 #undef HAVE_SBRK
 
 /* Define to 1 if you have the `sendmsg' function. */

configure

@@ -18123,7 +18123,7 @@ if test "$ac_res" != no; then :
 
 fi
 
-for ac_func in tzset sigprocmask fcntl getpwnam getrlimit setrlimit setsid sbrk chroot kill chown sleep usleep random srandom recvmsg sendmsg writev socketpair glob initgroups strftime localtime_r setusercontext _beginthreadex endservent endprotoent fsync
+for ac_func in tzset sigprocmask fcntl getpwnam getrlimit setrlimit setsid chroot kill chown sleep usleep random srandom recvmsg sendmsg writev socketpair glob initgroups strftime localtime_r setusercontext _beginthreadex endservent endprotoent fsync
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
@@ -18182,6 +18182,33 @@ fi
 done
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sbrk" >&5
+$as_echo_n "checking for sbrk... " >&6; }
+# catch the warning of deprecated sbrk
+old_cflags="$CFLAGS"
+CFLAGS="$CFLAGS -Werror"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+
+int main(void) { void* cur = sbrk(0); printf("%u\n", (unsigned)(size_t)((char*)cur - (char*)sbrk(0))); return 0; }
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_SBRK 1" >>confdefs.h
+
+
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+CFLAGS="$old_cflags"
+
 # check if setreuid en setregid fail, on MacOSX10.4(darwin8).
 if echo $build_os | grep darwin8 > /dev/null; then
 

configure.ac

@@ -1013,10 +1013,23 @@ AC_INCLUDES_DEFAULT
 #endif
 ])
 AC_SEARCH_LIBS([setusercontext], [util])
-AC_CHECK_FUNCS([tzset sigprocmask fcntl getpwnam getrlimit setrlimit setsid sbrk chroot kill chown sleep usleep random srandom recvmsg sendmsg writev socketpair glob initgroups strftime localtime_r setusercontext _beginthreadex endservent endprotoent fsync])
+AC_CHECK_FUNCS([tzset sigprocmask fcntl getpwnam getrlimit setrlimit setsid chroot kill chown sleep usleep random srandom recvmsg sendmsg writev socketpair glob initgroups strftime localtime_r setusercontext _beginthreadex endservent endprotoent fsync])
 AC_CHECK_FUNCS([setresuid],,[AC_CHECK_FUNCS([setreuid])])
 AC_CHECK_FUNCS([setresgid],,[AC_CHECK_FUNCS([setregid])])
 
+AC_MSG_CHECKING([for sbrk])
+# catch the warning of deprecated sbrk
+old_cflags="$CFLAGS"
+CFLAGS="$CFLAGS -Werror"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE(AC_INCLUDES_DEFAULT
+[[
+int main(void) { void* cur = sbrk(0); printf("%u\n", (unsigned)(size_t)((char*)cur - (char*)sbrk(0))); return 0; }
+]])], [
+	AC_MSG_RESULT(yes)
+	AC_DEFINE(HAVE_SBRK, 1, [define if you have the sbrk() call])
+    ], [AC_MSG_RESULT(no)])
+CFLAGS="$old_cflags"
+
 # check if setreuid en setregid fail, on MacOSX10.4(darwin8).
 if echo $build_os | grep darwin8 > /dev/null; then
 	AC_DEFINE(DARWIN_BROKEN_SETREUID, 1, [Define this if on macOSX10.4-darwin8 and setreuid and setregid do not work])

doc/Changelog

@@ -2,6 +2,7 @@
 	- remove NULL-checks before free, patch from Michael McConville.
 	- updated ax_pthread.m4 to version 21 with clang support, this
 	  removes a warning from compilation.
+	- OSX portability, detect if sbrk is deprecated.
 
 10 December 2015: Wouter
 	- 1.5.7 release