- Travis, fix warning in ubsan compile.

- Fix configure Targetconfiditionals.h header check, to use compile.

.travis.yml

@@ -327,7 +327,7 @@ script:
   - |
     export MAKE_TEST="yes"
     if [ "$TEST_UBSAN" = "yes" ]; then
-      export CFLAGS="-DNDEBUG -g2 -O3 -fsanitize=undefined -fno-sanitize-recover"
+      export CFLAGS="-DNDEBUG -g2 -O3 -fsanitize=undefined -fno-sanitize-recover=all"
     elif [ "$TEST_ASAN" = "yes" ]; then
       export CFLAGS="-DNDEBUG -g2 -O3 -fsanitize=address"
     fi

configure

@@ -14793,7 +14793,8 @@ done
 # Check for Apple header. This uncovers TARGET_OS_IPHONE, TARGET_OS_TV or TARGET_OS_WATCH
 for ac_header in TargetConditionals.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "TargetConditionals.h" "ac_cv_header_TargetConditionals_h" "$ac_includes_default"
+  ac_fn_c_check_header_compile "$LINENO" "TargetConditionals.h" "ac_cv_header_TargetConditionals_h" "$ac_includes_default
+"
 if test "x$ac_cv_header_TargetConditionals_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_TARGETCONDITIONALS_H 1

configure.ac

@@ -407,7 +407,7 @@ AC_CHECK_HEADERS([net/if.h],,, [
 ])
 
 # Check for Apple header. This uncovers TARGET_OS_IPHONE, TARGET_OS_TV or TARGET_OS_WATCH
-AC_CHECK_HEADERS([TargetConditionals.h])
+AC_CHECK_HEADERS([TargetConditionals.h],,, [AC_INCLUDES_DEFAULT])
 
 # check for types.  
 # Using own tests for int64* because autoconf builtin only give 32bit.

doc/Changelog

@@ -2,6 +2,8 @@
 	- Fix deprecation test to work for iOS TVOS and WatchOS, it uses
 	  CFLAGS and CPPFLAGS and also checks if the item is unavailable.
 	- Travis, fix script to fail when tasks fail.
+	- Travis, fix warning in ubsan compile.
+	- Fix configure Targetconfiditionals.h header check, to use compile.
 
 23 March 2021: Wouter
 	- Travis enable all tests again. Clang analyzer only a couple times,