Cleanup some CMake stuff

CMakeLists.txt

@@ -30,10 +30,12 @@ if(WUT_BUILD_TOOLS)
 endif()
 
 if(WUT_BUILD_PPC)
-   set(DEVKITPPC $ENV{DEVKITPPC} CACHE STRING "Path to devkitPPC install")
+   if(NOT WUT_BUILD_TOOLS)
+      message(FATAL_ERROR "WUT_BUILD_PPC requires WUT_BUILD_TOOLS.")
+   endif()
 
-   if(NOT DEVKITPPC)
-       message(FATAL_ERROR "You must have defined DEVKITPPC to build PPC libraries.")
+   if(NOT DEFINED ENV{DEVKITPPC})
+      message(FATAL_ERROR "You must have defined DEVKITPPC in your environment to build PPC libraries.")
    endif()
 
    set(WUT_TOOLCHAIN "${CMAKE_CURRENT_SOURCE_DIR}/share/wut.toolchain.cmake")
@@ -43,7 +45,6 @@ if(WUT_BUILD_PPC)
       CMAKE_GENERATOR "Unix Makefiles"
       INSTALL_DIR "${WUT_STAGING}"
       CMAKE_CACHE_ARGS
-         -DDEVKITPPC:string=${DEVKITPPC}
          -DWUT_ROOT:filepath=${WUT_ROOT}
          -DWUT_RPLIMPORTGEN:filepath=$<TARGET_FILE:rplimportgen>
          -DCMAKE_TOOLCHAIN_FILE:filepath=${WUT_TOOLCHAIN}
@@ -56,7 +57,6 @@ if(WUT_BUILD_PPC)
       CMAKE_GENERATOR "Unix Makefiles"
       INSTALL_DIR "${WUT_STAGING}"
       CMAKE_CACHE_ARGS
-         -DDEVKITPPC:string=${DEVKITPPC}
          -DWUT_ROOT:filepath=${WUT_ROOT}
          -DCMAKE_TOOLCHAIN_FILE:filepath=${WUT_TOOLCHAIN}
          -DCMAKE_INSTALL_PREFIX:string=<INSTALL_DIR>

share/wut.toolchain.cmake

@@ -5,21 +5,20 @@ set(CMAKE_SYSTEM_VERSION 1)
 set(CMAKE_SYSTEM_PROCESSOR "ppc")
 set(CMAKE_CROSSCOMPILING 1)
 
-set(DEVKITPPC $ENV{DEVKITPPC} CACHE STRING "Path to devkitPPC install")
-set(WUT_ROOT $ENV{WUT_ROOT}   CACHE STRING "Path to wut install")
-
-if(NOT DEVKITPPC)
+if(NOT DEFINED ENV{DEVKITPPC})
    message(FATAL_ERROR "You must have defined DEVKITPPC before calling cmake.")
 endif()
 
-if(NOT WUT_ROOT)
-   get_filename_component(WUT_ROOT ${CMAKE_CURRENT_LIST_DIR} DIRECTORY)
+if(NOT DEFINED ENV{WUT_ROOT})
+   if(EXISTS ${CMAKE_CURRENT_LIST_DIR}/../share/wut.cmake)
+      get_filename_component(ENV{WUT_ROOT} ${CMAKE_CURRENT_LIST_DIR} DIRECTORY)
+   else()
+      message(FATAL_ERROR "You must have defined WUT_ROOT before calling cmake.")
+   endif()
 endif()
 
-if(WIN32)
-   # Because "Unix Makefiles" generator does not set this, even if on Windows
-   set(CMAKE_EXECUTABLE_SUFFIX ".exe")
-endif()
+set(DEVKITPPC $ENV{DEVKITPPC})
+set(WUT_ROOT $ENV{WUT_ROOT})
 
 set(CMAKE_ASM_COMPILER     "${DEVKITPPC}/bin/powerpc-eabi-gcc${CMAKE_EXECUTABLE_SUFFIX}" CACHE PATH "")
 set(CMAKE_C_COMPILER       "${DEVKITPPC}/bin/powerpc-eabi-gcc${CMAKE_EXECUTABLE_SUFFIX}" CACHE PATH "")