@@ -44,10 +44,11 @@
 		])
 		OBJCFLAGS="$OBJCFLAGS -noixemul"
 		OBJFW_OBJCFLAGS="$OBJFW_OBJCFLAGS -noixemul"
 		CPPFLAGS="$CPPFLAGS -D__NO_NET_API"
 		LDFLAGS="$LDFLAGS -noixemul"
+		LIBS="$LIBS -ldebug"
 
 		enable_files="yes"	# Required for reading ENV:
 		enable_shared="no"
 		supports_amiga_lib="yes"
 
@@ -59,12 +60,13 @@
 			AC_SUBST(SFDC_INLINE_H, inline.h)
 			dnl For 68000, GCC emits calls to helper functions that
 			dnl do not work properly in a library.
 			t="-mcpu=68020 -fbaserel32 -noixemul"
 			AC_SUBST(AMIGA_LIB_CFLAGS, "$t -ffreestanding")
-			AC_SUBST(AMIGA_LIB_LDFLAGS,
-				"$t -resident32 -nostartfiles")
+			t="$t -resident32 -nostartfiles -nodefaultlibs"
+			t="$t -ldebug -lc"
+			AC_SUBST(AMIGA_LIB_LDFLAGS, $t)
 		])
 
 		AC_SUBST(LIBBASES_M, libbases.m)
 		;;
 	powerpc-*-amigaos*)
@@ -80,10 +82,11 @@
 			OBJCFLAGS="-O2 -g"
 		])
 		OBJCFLAGS="$OBJCFLAGS -noixemul"
 		OBJFW_OBJCFLAGS="$OBJFW_OBJCFLAGS -noixemul"
 		LDFLAGS="$LDFLAGS -noixemul"
+		LIBS="$LIBS -ldebug"
 
 		enable_files="yes"	# Required for reading ENV:
 		enable_shared="no"
 		supports_amiga_lib="yes"
 		check_pedantic="no"	# Breaks generated inlines
@@ -93,11 +96,11 @@
 			AC_SUBST(OBJFWRT_AMIGA_LIB, objfwrt.library)
 			AC_SUBST(CVINCLUDE_INLINE_H, inline.h)
 			t="-mresident32 -ffreestanding -noixemul"
 			AC_SUBST(AMIGA_LIB_CFLAGS, $t)
 			t="-mresident32 -nostartfiles -nodefaultlibs -noixemul"
-			t="$t -laboxstubs -labox -lmath -lc"
+			t="$t -laboxstubs -labox -lmath -ldebug -lc"
 			AC_SUBST(AMIGA_LIB_LDFLAGS, $t)
 		])
 
 		AC_SUBST(LIBBASES_M, libbases.m)
 		;;
@@ -1854,13 +1857,14 @@
 	OBJCFLAGS="$OBJCFLAGS -Wunreachable-code"
 	AC_MSG_CHECKING(whether -Wunreachable-code can be used)
 	AC_COMPILE_IFELSE([
 		AC_LANG_SOURCE([[
 			#include <stdlib.h>
-	
-			typedef void *SEL;
-	
+
+			struct objc_selector;
+			typedef const struct objc_selector *SEL;
+
 			#ifdef __has_attribute
 			# if __has_attribute(objc_root_class)
 			__attribute__((__objc_root_class__))
 			# endif
 			#endif
@@ -1870,14 +1874,14 @@
 			    __attribute__((__noreturn__))
 			#endif
 			    ;
 			- (void)dealloc;
 			@end
-	
+
 			@interface Foo: Object
 			@end
-	
+
 			void
 			test(void)
 			{
 				if (sizeof(int) == 4)
 					__asm__ ("");
@@ -1884,11 +1888,11 @@
 				else if (sizeof(int) == 8)
 					__asm__ ("");
 				else
 					abort();
 			}
-	
+
 			/*
 			 * Unfortunately, this cannot be shorter, as it only
 			 * works when it is used inside a macro.
 			 */
 			#ifdef __clang__
@@ -1907,11 +1911,11 @@
 									\
 				abort();				\
 									\
 				[super dealloc];
 			#endif
-	
+
 			@implementation Foo
 			- (void)dealloc
 			{
 				OF_DEALLOC_UNSUPPORTED
 			}