Fixed #6974 - false negative: uninitialized variable not detected (signal).

cfg/std.cfg

@@ -2735,12 +2735,15 @@
   </function>
   <!-- void (*signal(int sig, void (*func)(int)))(int); -->
   <function name="signal,std::signal">
+    <noreturn>true</noreturn>
     <arg nr="1">
       <not-uninit/>
     </arg>
+    <arg nr="2"/>
   </function>
   <!-- int raise(int sig); -->
   <function name="raise,std::raise">
+    <noreturn>true</noreturn>
     <arg nr="1">
       <not-uninit/>
     </arg>

test/cfg/runtests.sh

@@ -16,7 +16,7 @@ CPPCHECK_OPT='--check-library --enable=information --enable=style --error-exitco
 CXX=g++
 CXX_OPT='-fsyntax-only -std=c++0x'
 CC=gcc
-CC_OPT='-Wno-nonnull -Wno-implicit-function-declaration -fsyntax-only'
+CC_OPT='-Wno-nonnull -Wno-implicit-function-declaration -Wno-deprecated-declarations -fsyntax-only'
 
 # posix.c
 ${CC} ${CC_OPT} ${DIR}posix.c

test/cfg/std.c

@@ -2702,7 +2702,7 @@ void uninitvar_signbit(void)
     // cppcheck-suppress uninitvar
     (void)signbit(d);
 }
-#if 0
+
 void uninivar_signal(void)
 {
     int i;
@@ -2716,4 +2716,3 @@ void uninivar_raise(void)
     // cppcheck-suppress uninitvar
     (void)raise(i);
 }
-#endif

test/cfg/std.cpp

@@ -18,6 +18,7 @@
 #include <cfenv>
 #include <csetjmp>
 #include <cmath>
+#include <csignal>
 
 void bufferAccessOutOfBounds(void)
 {
@@ -2025,7 +2026,6 @@ void uninitvar_signbit(void)
     (void)std::signbit(d);
 }
 
-#if 0
 void uninivar_signal(void)
 {
     int i;
@@ -2039,4 +2039,3 @@ void uninivar_raise(void)
     // cppcheck-suppress uninitvar
     (void)std::raise(i);
 }
-#endif