tool_hugehelp: make hugehelp a blank macro when disabled

Closes #9485

src/CMakeLists.txt

@@ -47,9 +47,7 @@ if(USE_MANUAL)
 else()
   add_custom_command(
     OUTPUT tool_hugehelp.c
-    COMMAND ${CMAKE_COMMAND} -E echo "/* built-in manual is disabled, blank function */" > tool_hugehelp.c
-    COMMAND ${CMAKE_COMMAND} -E echo "#include \"tool_hugehelp.h\"" >> tool_hugehelp.c
-    COMMAND ${CMAKE_COMMAND} -E echo "void hugehelp(void) {}" >> tool_hugehelp.c
+    COMMAND ${CMAKE_COMMAND} -E echo "#include \"tool_hugehelp.h\"" > tool_hugehelp.c
     DEPENDS
       "${CMAKE_CURRENT_SOURCE_DIR}/tool_hugehelp.h"
     VERBATIM)

src/Makefile.am

@@ -127,9 +127,7 @@ endif
 else # USE_MANUAL
 # built-in manual has been disabled, make a blank file
 $(HUGE):
-	$(HUGECMD)(echo "/* built-in manual is disabled, blank function */" > $(HUGE); \
-	echo '#include "tool_hugehelp.h"' >> $(HUGE); \
-	echo "void hugehelp(void) {}" >>$(HUGE) )
+	echo '#include "tool_hugehelp.h"' >> $(HUGE)
 endif
 
 # ignore tool_hugehelp.c since it is generated source code and it plays

src/mkhelp.pl

@@ -227,10 +227,6 @@ foot();
 
 sub foot {
   print <<FOOT
-#else /* !USE_MANUAL */
-/* built-in manual is disabled, blank function */
-#include "tool_hugehelp.h"
-void hugehelp(void) {}
 #endif /* USE_MANUAL */
 FOOT
   ;

src/tool_hugehelp.h

@@ -25,6 +25,11 @@
  ***************************************************************************/
 #include "tool_setup.h"
 
+#ifdef USE_MANUAL
 void hugehelp(void);
+#else
+/* do nothing if not there */
+#define hugehelp()
+#endif
 
 #endif /* HEADER_CURL_TOOL_HUGEHELP_H */