AP_Scripting: remove compile errors and warnings

libraries/AP_Scripting/lua/src/lcode.c

@@ -9,6 +9,9 @@
 
 #if defined(ARDUPILOT_BUILD)
 #pragma GCC diagnostic ignored "-Wfloat-equal"
+#if defined(__GNUC__) &&  __GNUC__ >= 7 || defined(__clang_major__) && __clang_major__ >= 11
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
 #endif
 
 #include "lprefix.h"

libraries/AP_Scripting/lua/src/lstrlib.c

@@ -26,6 +26,9 @@
 
 #if defined(ARDUPILOT_BUILD)
 #pragma GCC diagnostic ignored "-Wunused-function"
+#if defined(__GNUC__) &&  __GNUC__ >= 7 || defined(__clang_major__) && __clang_major__ >= 11
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
 #endif
 
 

libraries/AP_Scripting/lua/src/ltable.c

@@ -9,6 +9,9 @@
 
 #if defined(ARDUPILOT_BUILD)
 #pragma GCC diagnostic ignored "-Wfloat-equal"
+#if defined(__GNUC__) &&  __GNUC__ >= 7 || defined(__clang_major__) && __clang_major__ >= 11
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif
 #endif
 
 #include "lprefix.h"

libraries/AP_Scripting/lua/src/lundump.c

@@ -6,6 +6,9 @@
 
 #if defined(ARDUPILOT_BUILD)
 #pragma GCC diagnostic ignored "-Wfloat-equal"
+#if defined(__GNUC__) &&  __GNUC__ >= 7 || defined(__clang_major__) && __clang_major__ >= 11
+#pragma GCC diagnostic ignored "-Wstring-plus-int"
+#endif
 #endif
 
 #define lundump_c

libraries/AP_Scripting/lua_boxed_numerics.cpp

@@ -26,7 +26,7 @@ uint32_t coerce_to_uint32_t(lua_State *L, int arg) {
     { // float
         int success;
         const lua_Number v = lua_tonumberx(L, arg, &success);
-        if (success && v >= 0 && v <= UINT32_MAX) {
+        if (success && v >= 0 && v <= float(UINT32_MAX)) {
             return static_cast<uint32_t>(v);
         }
     }

libraries/AP_Scripting/wscript

@@ -7,8 +7,9 @@ build generated bindings from bindings.desc for AP_Scripting
 from waflib.TaskGen import after_method, before_method, feature
 import os
 
-CFLAGS="-std=c99 -Wno-error=missing-field-initializers -Wall -Werror -Wextra"
-CC="gcc"
+# these are only used for binding generation, not compilation of the library
+BINDING_CFLAGS="-std=c99 -Wno-error=missing-field-initializers -Wall -Werror -Wextra"
+BINDING_CC="gcc"
 
 def configure(cfg):
     cfg.env.AP_LIB_EXTRA_SOURCES['AP_Scripting'] = ['lua_generated_bindings.cpp']
@@ -30,7 +31,7 @@ def build(bld):
         source=main_c,
         target=[gen_bindings],
         # we should have configure tests for finding the native compiler
-        rule="%s %s -o %s %s" % (CC, CFLAGS, gen_bindings_rel, main_c_rel),
+        rule="%s %s -o %s %s" % (BINDING_CC, BINDING_CFLAGS, gen_bindings_rel, main_c_rel),
         group='dynamic_sources',
     )