PellesC: Add support for Windows Resources

The PellesC toolchain provides a `porc` tool to compile them.

Note that `polib` fails to archive resource files (`.res`):

    POLIB: fatal error: An internal error occurred

Turn off the static library part of the VSResource test.

Issue: #21536
Inspired-by: Serguei E. Leontiev <leo@sai.msu.ru>

Modules/Platform/Windows-PellesC.cmake

@@ -21,4 +21,9 @@ macro(__windows_compiler_pellesc lang)
 
   set(CMAKE_${lang}_CREATE_WIN32_EXE "-subsystem:windows")
   set(CMAKE_${lang}_CREATE_CONSOLE_EXE "-subsystem:console")
+
+  if(NOT CMAKE_RC_COMPILER_INIT)
+    set(CMAKE_RC_COMPILER_INIT porc)
+  endif()
+  enable_language(RC)
 endmacro()

Modules/Platform/Windows-porc.cmake

@@ -0,0 +1 @@
+set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -Fo<OBJECT> <SOURCE>")

Tests/CMakeLists.txt

@@ -444,6 +444,7 @@ if(BUILD_TESTING)
 
   if(CMake_TEST_RESOURCES)
     ADD_TEST_MACRO(VSResource VSResource)
+    set_property(TEST VSResource APPEND PROPERTY LABELS "PellesC")
     if(CMAKE_GENERATOR MATCHES "Ninja")
       add_test_macro(VSResourceNinjaForceRSP VSResourceNinjaForceRSP)
     endif()

Tests/VSResource/CMakeLists.txt

@@ -13,9 +13,8 @@ message(STATUS "CMAKE_RC_COMPILER='${CMAKE_RC_COMPILER}'")
 # add_definitions is fine for simple definitions (with no spaces and no
 # quoting), but requires avoidance or work-arounds beyond that...
 
-if(CMAKE_RC_COMPILER MATCHES windres)
+if(CMAKE_RC_COMPILER MATCHES "(windres|porc)")
   # windres rc compiler does not properly define quoted /D values as strings
-  message(STATUS "CMAKE_RC_COMPILER MATCHES windres")
   add_definitions(/DCMAKE_RCDEFINE=test.txt)
   add_definitions(/DCMAKE_RCDEFINE_NO_QUOTED_STRINGS)
   if(CMAKE_CURRENT_BINARY_DIR MATCHES " ")
@@ -45,10 +44,13 @@ else()
   include_directories(${CMAKE_CURRENT_BINARY_DIR})
 endif()
 
-add_library(ResourceLib STATIC lib.c lib.rc)
-
 add_executable(VSResource main.c test.rc)
-target_link_libraries(VSResource ResourceLib)
+
+if(NOT CMAKE_AR MATCHES "polib")
+  add_library(ResourceLib STATIC lib.c lib.rc)
+  target_link_libraries(VSResource PRIVATE ResourceLib)
+  target_compile_definitions(VSResource PRIVATE HAVE_RESOURCE_LIB)
+endif()
 
 if(MSVC AND NOT MSVC_VERSION VERSION_LESS 1600)
   set_property(SOURCE test.rc PROPERTY COMPILE_FLAGS /nologo)

Tests/VSResource/main.c

@@ -2,7 +2,9 @@
 
 #include <stdio.h>
 
+#ifdef HAVE_RESOURCE_LIB
 extern int lib(void);
+#endif
 
 struct x
 {
@@ -76,5 +78,9 @@ int main(int argc, char** argv)
     }
   }
 
-  return ret + lib();
+  return ret
+#ifdef HAVE_RESOURCE_LIB
+    + lib()
+#endif
+    ;
 }