Fix more SDL_main issues

- Always include SDL2/SDL_main.h in all tests to handle main() correctly
- Link all tests with SDL2pp (and thus with libSDL2main)

tests/CMakeLists.txt

@@ -29,6 +29,7 @@ FOREACH(HEADER ${LIBRARY_HEADERS})
 	STRING(REGEX REPLACE [^a-zA-Z0-9] _ HEADER_NORMALIZED ${HEADER})
 	CONFIGURE_FILE(header_test.cc.in ${HEADER_NORMALIZED}_test.cc)
 	ADD_EXECUTABLE(${HEADER_NORMALIZED}_test ${HEADER_NORMALIZED}_test.cc)
+	TARGET_LINK_LIBRARIES(${HEADER_NORMALIZED}_test SDL2pp)
 ENDFOREACH(HEADER ${TESTS})
 
 FOREACH(TEST ${CLI_TESTS})

tests/header_test.cc.in

@@ -1,3 +1,4 @@
+#include <SDL2/SDL_main.h>
 #include <@HEADER@>
 
 int main(int, char*[]) {

tests/test_error.cc

@@ -1,3 +1,4 @@
+#include <SDL2/SDL_main.h>
 #include <SDL2/SDL_error.h>
 
 #include <SDL2pp/Exception.hh>

tests/test_optional.cc

@@ -1,5 +1,7 @@
 #include <string>
 
+#include <SDL2/SDL_main.h>
+
 #include <SDL2pp/Optional.hh>
 
 #include "testing.h"

tests/test_pointrect.cc

@@ -1,3 +1,5 @@
+#include <SDL2/SDL_main.h>
+
 #include <SDL2pp/Point.hh>
 #include <SDL2pp/Rect.hh>
 

tests/test_pointrect_constexpr.cc

@@ -1,3 +1,5 @@
+#include <SDL2/SDL_main.h>
+
 #include <SDL2pp/Point.hh>
 #include <SDL2pp/Rect.hh>
 

tests/test_rwops.cc

@@ -1,5 +1,7 @@
 #include <vector>
 
+#include <SDL2/SDL_main.h>
+
 #include <SDL2pp/Exception.hh>
 #include <SDL2pp/ContainerRWops.hh>
 #include <SDL2pp/StreamRWops.hh>