Cleanup: quiet uninitialized warnings for finder root directories

build_files/cmake/Modules/FindAlembic.cmake

@@ -13,9 +13,13 @@
 #  ALEMBIC_FOUND, If false, do not try to use Alembic.
 #
 
-# If ALEMBIC_ROOT_DIR was defined in the environment, use it.
-IF(NOT ALEMBIC_ROOT_DIR AND NOT $ENV{ALEMBIC_ROOT_DIR} STREQUAL "")
+# If `ALEMBIC_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED ALEMBIC_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{ALEMBIC_ROOT_DIR})
   SET(ALEMBIC_ROOT_DIR $ENV{ALEMBIC_ROOT_DIR})
+ELSE()
+  SET(ALEMBIC_ROOT_DIR "")
 ENDIF()
 
 SET(_alembic_SEARCH_DIRS

build_files/cmake/Modules/FindBlosc.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  BLOSC_LIBRARY, where to find the Blosc library.
 
-# If BLOSC_ROOT_DIR was defined in the environment, use it.
-IF(NOT BLOSC_ROOT_DIR AND NOT $ENV{BLOSC_ROOT_DIR} STREQUAL "")
+# If `BLOSC_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED BLOSC_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{BLOSC_ROOT_DIR})
   SET(BLOSC_ROOT_DIR $ENV{BLOSC_ROOT_DIR})
+ELSE()
+  SET(BLOSC_ROOT_DIR "")
 ENDIF()
 
 SET(_blosc_SEARCH_DIRS

build_files/cmake/Modules/FindBrotli.cmake

@@ -12,9 +12,13 @@
 #  BROTLI_FOUND, If false, do not try to use Brotli.
 #
 
-# If BROTLI_ROOT_DIR was defined in the environment, use it.
-IF(NOT BROTLI_ROOT_DIR AND NOT $ENV{BROTLI_ROOT_DIR} STREQUAL "")
+# If `BROTLI_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED BROTLI_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{BROTLI_ROOT_DIR})
   SET(BROTLI_ROOT_DIR $ENV{BROTLI_ROOT_DIR})
+ELSE()
+  SET(BROTLI_ROOT_DIR "")
 ENDIF()
 
 SET(_BROTLI_SEARCH_DIRS

build_files/cmake/Modules/FindClang.cmake

@@ -12,9 +12,13 @@
 #                        This can also be an environment variable.
 #  CLANG_FOUND, If false, do not try to use Clang.
 
-# If CLANG_ROOT_DIR was defined in the environment, use it.
-if(NOT CLANG_ROOT_DIR AND NOT $ENV{CLANG_ROOT_DIR} STREQUAL "")
+# If `CLANG_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED CLANG_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{CLANG_ROOT_DIR})
   set(CLANG_ROOT_DIR $ENV{CLANG_ROOT_DIR})
+else()
+  set(CLANG_ROOT_DIR "")
 endif()
 
 if(NOT LLVM_ROOT_DIR)

build_files/cmake/Modules/FindClangTidy.cmake

@@ -18,9 +18,13 @@
 #
 #  CLANG_TIDY_FOUND, If false, do not try to use Eigen3.
 
-# If CLANG_TIDY_ROOT_DIR was defined in the environment, use it.
-if(NOT CLANG_TIDY_ROOT_DIR AND NOT $ENV{CLANG_TIDY_ROOT_DIR} STREQUAL "")
+# If `CLANG_TIDY_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED CLANG_TIDY_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{CLANG_TIDY_ROOT_DIR})
   set(CLANG_TIDY_ROOT_DIR $ENV{CLANG_TIDY_ROOT_DIR})
+else()
+  set(CLANG_TIDY_ROOT_DIR "")
 endif()
 
 set(_clang_tidy_SEARCH_DIRS

build_files/cmake/Modules/FindEigen3.cmake

@@ -11,9 +11,13 @@
 #                    This can also be an environment variable.
 #  EIGEN3_FOUND, If false, do not try to use Eigen3.
 
-# If EIGEN3_ROOT_DIR was defined in the environment, use it.
-IF(NOT EIGEN3_ROOT_DIR AND NOT $ENV{EIGEN3_ROOT_DIR} STREQUAL "")
+# If `EIGEN3_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED EIGEN3_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{EIGEN3_ROOT_DIR})
   SET(EIGEN3_ROOT_DIR $ENV{EIGEN3_ROOT_DIR})
+ELSE()
+  SET(EIGEN3_ROOT_DIR "")
 ENDIF()
 
 SET(_eigen3_SEARCH_DIRS

build_files/cmake/Modules/FindEmbree.cmake

@@ -12,9 +12,13 @@
 #                        This can also be an environment variable.
 #  EMBREEFOUND, If false, do not try to use Embree.
 
-# If EMBREE_ROOT_DIR was defined in the environment, use it.
-IF(NOT EMBREE_ROOT_DIR AND NOT $ENV{EMBREE_ROOT_DIR} STREQUAL "")
+# If `EMBREE_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED EMBREE_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{EMBREE_ROOT_DIR})
   SET(EMBREE_ROOT_DIR $ENV{EMBREE_ROOT_DIR})
+ELSE()
+  SET(EMBREE_ROOT_DIR "")
 ENDIF()
 
 SET(_embree_SEARCH_DIRS

build_files/cmake/Modules/FindEpoxy.cmake

@@ -9,8 +9,13 @@
 #                     This can also be an environment variable.
 #  Epoxy_FOUND, If false, do not try to use epoxy.
 
-IF(NOT EPOXY_ROOT_DIR AND NOT $ENV{EPOXY_ROOT_DIR} STREQUAL "")
+# If `EPOXY_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED EPOXY_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{EPOXY_ROOT_DIR})
   SET(EPOXY_ROOT_DIR $ENV{EPOXY_ROOT_DIR})
+ELSE()
+  SET(EPOXY_ROOT_DIR "")
 ENDIF()
 
 FIND_PATH(Epoxy_INCLUDE_DIR

build_files/cmake/Modules/FindFFmpeg.cmake

@@ -13,9 +13,13 @@
 #  FFMPEG_FOUND, If false, do not try to use FFmpeg.
 #  FFMPEG_<COMPONENT>_LIBRARY, the given individual component libraries.
 
-# If FFMPEG_ROOT_DIR was defined in the environment, use it.
-if(NOT FFMPEG_ROOT_DIR AND NOT $ENV{FFMPEG_ROOT_DIR} STREQUAL "")
+# If `FFMPEG_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED FFMPEG_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{FFMPEG_ROOT_DIR})
   set(FFMPEG_ROOT_DIR $ENV{FFMPEG_ROOT_DIR})
+else()
+  set(FFMPEG_ROOT_DIR "")
 endif()
 
 set(_ffmpeg_SEARCH_DIRS

build_files/cmake/Modules/FindFftw3.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  FFTW3_LIBRARY, where to find the Fftw3 library.
 
-# If FFTW3_ROOT_DIR was defined in the environment, use it.
-IF(NOT FFTW3_ROOT_DIR AND NOT $ENV{FFTW3_ROOT_DIR} STREQUAL "")
+# If `FFTW3_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED FFTW3_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{FFTW3_ROOT_DIR})
   SET(FFTW3_ROOT_DIR $ENV{FFTW3_ROOT_DIR})
+ELSE()
+  SET(FFTW3_ROOT_DIR "")
 ENDIF()
 
 SET(_fftw3_SEARCH_DIRS

build_files/cmake/Modules/FindGMP.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  GMP_LIBRARY, where to find the GMP library.
 
-# If GMP_ROOT_DIR was defined in the environment, use it.
-IF(NOT GMP_ROOT_DIR AND NOT $ENV{GMP_ROOT_DIR} STREQUAL "")
+# If `GMP_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED GMP_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{GMP_ROOT_DIR})
   SET(GMP_ROOT_DIR $ENV{GMP_ROOT_DIR})
+ELSE()
+  SET(GMP_ROOT_DIR "")
 ENDIF()
 
 SET(_gmp_SEARCH_DIRS

build_files/cmake/Modules/FindGflags.cmake

@@ -60,9 +60,13 @@
 # GFLAGS_LIBRARY: gflags library, not including the libraries of any
 #                 dependencies.
 
-# If GFLAGS_ROOT_DIR was defined in the environment, use it.
-if(NOT GFLAGS_ROOT_DIR AND NOT $ENV{GFLAGS_ROOT_DIR} STREQUAL "")
+# If `GFLAGS_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED GFLAGS_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{GFLAGS_ROOT_DIR})
   set(GFLAGS_ROOT_DIR $ENV{GFLAGS_ROOT_DIR})
+else()
+  set(GFLAGS_ROOT_DIR "")
 endif()
 
 if(DEFINED GFLAGS_ROOT_DIR)

build_files/cmake/Modules/FindGlog.cmake

@@ -38,9 +38,13 @@
 # GLOG_LIBRARY: glog library, not including the libraries of any
 #               dependencies.
 
-# If GLOG_ROOT_DIR was defined in the environment, use it.
-if(NOT GLOG_ROOT_DIR AND NOT $ENV{GLOG_ROOT_DIR} STREQUAL "")
+# If `GLOG_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED GLOG_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{GLOG_ROOT_DIR})
   set(GLOG_ROOT_DIR $ENV{GLOG_ROOT_DIR})
+else()
+  set(GLOG_ROOT_DIR "")
 endif()
 
 if(DEFINED GLOG_ROOT_DIR)

build_files/cmake/Modules/FindHIP.cmake

@@ -7,9 +7,13 @@
 #  HIP_VERSION, the HIP compiler version
 #  HIP_FOUND, if the HIP toolkit is found.
 
-# If HIP_ROOT_DIR was defined in the environment, use it.
-if(NOT HIP_ROOT_DIR AND NOT $ENV{HIP_ROOT_DIR} STREQUAL "")
+# If `HIP_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED HIP_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{HIP_ROOT_DIR})
   set(HIP_ROOT_DIR $ENV{HIP_ROOT_DIR})
+else()
+  set(HIP_ROOT_DIR "")
 endif()
 
 set(_hip_SEARCH_DIRS

build_files/cmake/Modules/FindHIPRT.cmake

@@ -7,9 +7,13 @@
 #   HIPRT_BITCODE, bitcode file with ray-tracing functionality
 #   HIPRT_FOUND, if SDK found
 
-# If HIPRT_ROOT_DIR was defined in the environment, use it.
-if(NOT HIPRT_ROOT_DIR AND NOT $ENV{HIPRT_ROOT_DIR} STREQUAL "")
+# If `HIPRT_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED HIPRT_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{HIPRT_ROOT_DIR})
   set(HIPRT_ROOT_DIR $ENV{HIPRT_ROOT_DIR})
+else()
+  set(HIPRT_ROOT_DIR "")
 endif()
 
 set(_hiprt_SEARCH_DIRS

build_files/cmake/Modules/FindHaru.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  HARU_LIBRARY, where to find the Haru library.
 
-# If HARU_ROOT_DIR was defined in the environment, use it.
-if(NOT HARU_ROOT_DIR AND NOT $ENV{HARU_ROOT_DIR} STREQUAL "")
+# If `HARU_ROOT_DIR` was defined in the environment, use it.
+if(DEFINED HARU_ROOT_DIR)
+  # Pass.
+elseif(DEFINED ENV{HARU_ROOT_DIR})
   set(HARU_ROOT_DIR $ENV{HARU_ROOT_DIR})
+else()
+  set(HARU_ROOT_DIR "")
 endif()
 
 set(_haru_SEARCH_DIRS

build_files/cmake/Modules/FindIcuLinux.cmake

@@ -13,9 +13,13 @@
 # also defined, but not for general use are
 #  ICU_LIBRARY_xxx, where to find the icu libraries.
 
-# If ICU_ROOT_DIR was defined in the environment, use it.
-IF(NOT ICU_ROOT_DIR AND NOT $ENV{ICU_ROOT_DIR} STREQUAL "")
+# If `ICU_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED ICU_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{ICU_ROOT_DIR})
   SET(ICU_ROOT_DIR $ENV{ICU_ROOT_DIR})
+ELSE()
+  SET(ICU_ROOT_DIR "")
 ENDIF()
 
 if(Boost_USE_STATIC_LIBS)

build_files/cmake/Modules/FindJack.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  JACK_LIBRARY, where to find the JACK library.
 
-# If JACK_ROOT_DIR was defined in the environment, use it.
-IF(NOT JACK_ROOT_DIR AND NOT $ENV{JACK_ROOT_DIR} STREQUAL "")
+# If `JACK_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED JACK_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{JACK_ROOT_DIR})
   SET(JACK_ROOT_DIR $ENV{JACK_ROOT_DIR})
+ELSE()
+  SET(JACK_ROOT_DIR "")
 ENDIF()
 
 SET(_jack_SEARCH_DIRS

build_files/cmake/Modules/FindJeMalloc.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  JEMALLOC_LIBRARY, where to find the JeMalloc library.
 
-# If JEMALLOC_ROOT_DIR was defined in the environment, use it.
-IF(NOT JEMALLOC_ROOT_DIR AND NOT $ENV{JEMALLOC_ROOT_DIR} STREQUAL "")
+# If `JEMALLOC_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED JEMALLOC_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{JEMALLOC_ROOT_DIR})
   SET(JEMALLOC_ROOT_DIR $ENV{JEMALLOC_ROOT_DIR})
+ELSE()
+  SET(JEMALLOC_ROOT_DIR "")
 ENDIF()
 
 SET(_jemalloc_SEARCH_DIRS

build_files/cmake/Modules/FindLZO.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  LZO_LIBRARY, where to find the LZO library.
 
-# If LZO_ROOT_DIR was defined in the environment, use it.
-IF(NOT LZO_ROOT_DIR AND NOT $ENV{LZO_ROOT_DIR} STREQUAL "")
+# If `LZO_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED LZO_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{LZO_ROOT_DIR})
   SET(LZO_ROOT_DIR $ENV{LZO_ROOT_DIR})
+ELSE()
+  SET(LZO_ROOT_DIR "")
 ENDIF()
 
 SET(_lzo_SEARCH_DIRS

build_files/cmake/Modules/FindMoltenVK.cmake

@@ -13,9 +13,13 @@
 #  MOLTENVK_FOUND, If false, do not try to use MoltenVK.
 #
 
-# If MOLTENVK_ROOT_DIR was defined in the environment, use it.
-IF(NOT MOLTENVK_ROOT_DIR AND NOT $ENV{MOLTENVK_ROOT_DIR} STREQUAL "")
+# If `MOLTENVK_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED MOLTENVK_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{MOLTENVK_ROOT_DIR})
   SET(MOLTENVK_ROOT_DIR $ENV{MOLTENVK_ROOT_DIR})
+ELSE()
+  SET(MOLTENVK_ROOT_DIR "")
 ENDIF()
 
 SET(_moltenvk_SEARCH_DIRS

build_files/cmake/Modules/FindNanoVDB.cmake

@@ -11,9 +11,13 @@
 #                     This can also be an environment variable.
 #  NANOVDB_FOUND, If false, do not try to use NanoVDB.
 
-# If NANOVDB_ROOT_DIR was defined in the environment, use it.
-IF(NOT NANOVDB_ROOT_DIR AND NOT $ENV{NANOVDB_ROOT_DIR} STREQUAL "")
+# If `NANOVDB_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED NANOVDB_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{NANOVDB_ROOT_DIR})
   SET(NANOVDB_ROOT_DIR $ENV{NANOVDB_ROOT_DIR})
+ELSE()
+  SET(NANOVDB_ROOT_DIR "")
 ENDIF()
 
 SET(_nanovdb_SEARCH_DIRS

build_files/cmake/Modules/FindOSL.cmake

@@ -15,9 +15,13 @@
 #  OSL_LIBRARY_VERSION_MAJOR, OSL_LIBRARY_VERSION_MINOR,  the major
 #                and minor versions of OSL library if found.
 
-# If OSL_ROOT_DIR was defined in the environment, use it.
-IF(NOT OSL_ROOT_DIR AND NOT $ENV{OSL_ROOT_DIR} STREQUAL "")
+# If `OSL_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OSL_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OSL_ROOT_DIR})
   SET(OSL_ROOT_DIR $ENV{OSL_ROOT_DIR})
+ELSE()
+  SET(OSL_ROOT_DIR "")
 ENDIF()
 
 SET(_osl_FIND_COMPONENTS

build_files/cmake/Modules/FindOpenCOLLADA.cmake

@@ -20,9 +20,13 @@
 # Where '/opt/opencollada' is the base dir:
 # /opt/opencollada/COLLADABaseUtils/include/COLLADABUPlatform.h
 
-# If OPENCOLLADA_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENCOLLADA_ROOT_DIR AND NOT $ENV{OPENCOLLADA_ROOT_DIR} STREQUAL "")
+# If `OPENCOLLADA_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENCOLLADA_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENCOLLADA_ROOT_DIR})
   SET(OPENCOLLADA_ROOT_DIR $ENV{OPENCOLLADA_ROOT_DIR})
+ELSE()
+  SET(OPENCOLLADA_ROOT_DIR "")
 ENDIF()
 
 SET(_opencollada_FIND_INCLUDES

build_files/cmake/Modules/FindOpenColorIO.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  OPENCOLORIO_LIBRARY, where to find the OpenColorIO library.
 
-# If OPENCOLORIO_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENCOLORIO_ROOT_DIR AND NOT $ENV{OPENCOLORIO_ROOT_DIR} STREQUAL "")
+# If `OPENCOLORIO_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENCOLORIO_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENCOLORIO_ROOT_DIR})
   SET(OPENCOLORIO_ROOT_DIR $ENV{OPENCOLORIO_ROOT_DIR})
+ELSE()
+  SET(OPENCOLORIO_ROOT_DIR "")
 ENDIF()
 
 SET(_opencolorio_FIND_COMPONENTS

build_files/cmake/Modules/FindOpenEXR.cmake

@@ -22,9 +22,13 @@
 # also defined, but not for general use are
 #  OPENEXR_LIBRARY, where to find the OpenEXR library.
 
-# If OPENEXR_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENEXR_ROOT_DIR AND NOT $ENV{OPENEXR_ROOT_DIR} STREQUAL "")
+# If `OPENEXR_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENEXR_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENEXR_ROOT_DIR})
   SET(OPENEXR_ROOT_DIR $ENV{OPENEXR_ROOT_DIR})
+ELSE()
+  SET(OPENEXR_ROOT_DIR "")
 ENDIF()
 
 # Old versions (before 2.0?) do not have any version string,

build_files/cmake/Modules/FindOpenImageDenoise.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  OPENIMAGEDENOISE_LIBRARY, where to find the OpenImageDenoise library.
 
-# If OPENIMAGEDENOISE_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENIMAGEDENOISE_ROOT_DIR AND NOT $ENV{OPENIMAGEDENOISE_ROOT_DIR} STREQUAL "")
+# If `OPENIMAGEDENOISE_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENIMAGEDENOISE_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENIMAGEDENOISE_ROOT_DIR})
   SET(OPENIMAGEDENOISE_ROOT_DIR $ENV{OPENIMAGEDENOISE_ROOT_DIR})
+ELSE()
+  SET(OPENIMAGEDENOISE_ROOT_DIR "")
 ENDIF()
 
 SET(_openimagedenoise_SEARCH_DIRS

build_files/cmake/Modules/FindOpenImageIO.cmake

@@ -17,9 +17,13 @@
 # also defined, but not for general use are
 #  OPENIMAGEIO_LIBRARY, where to find the OpenImageIO library.
 
-# If OPENIMAGEIO_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENIMAGEIO_ROOT_DIR AND NOT $ENV{OPENIMAGEIO_ROOT_DIR} STREQUAL "")
+# If `OPENIMAGEIO_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENIMAGEIO_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENIMAGEIO_ROOT_DIR})
   SET(OPENIMAGEIO_ROOT_DIR $ENV{OPENIMAGEIO_ROOT_DIR})
+ELSE()
+  SET(OPENIMAGEIO_ROOT_DIR "")
 ENDIF()
 
 SET(_openimageio_SEARCH_DIRS

build_files/cmake/Modules/FindOpenJPEG.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  OPENJPEG_LIBRARY, where to find the OpenJPEG library.
 
-# If OPENJPEG_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENJPEG_ROOT_DIR AND NOT $ENV{OPENJPEG_ROOT_DIR} STREQUAL "")
+# If `OPENJPEG_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENJPEG_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENJPEG_ROOT_DIR})
   SET(OPENJPEG_ROOT_DIR $ENV{OPENJPEG_ROOT_DIR})
+ELSE()
+  SET(OPENJPEG_ROOT_DIR "")
 ENDIF()
 
 SET(_openjpeg_SEARCH_DIRS

build_files/cmake/Modules/FindOpenSubdiv.cmake

@@ -12,9 +12,13 @@
 #                        This can also be an environment variable.
 #  OPENSUBDIV_FOUND, if false, do not try to use OpenSubdiv.
 
-# If OPENSUBDIV_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENSUBDIV_ROOT_DIR AND NOT $ENV{OPENSUBDIV_ROOT_DIR} STREQUAL "")
+# If `OPENSUBDIV_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENSUBDIV_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENSUBDIV_ROOT_DIR})
   SET(OPENSUBDIV_ROOT_DIR $ENV{OPENSUBDIV_ROOT_DIR})
+ELSE()
+  SET(OPENSUBDIV_ROOT_DIR "")
 ENDIF()
 
 SET(_opensubdiv_FIND_COMPONENTS

build_files/cmake/Modules/FindOpenVDB.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  OPENVDB_LIBRARY, where to find the OPENVDB library.
 
-# If OPENVDB_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPENVDB_ROOT_DIR AND NOT $ENV{OPENVDB_ROOT_DIR} STREQUAL "")
+# If `OPENVDB_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPENVDB_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPENVDB_ROOT_DIR})
   SET(OPENVDB_ROOT_DIR $ENV{OPENVDB_ROOT_DIR})
+ELSE()
+  SET(OPENVDB_ROOT_DIR "")
 ENDIF()
 
 SET(_openvdb_SEARCH_DIRS

build_files/cmake/Modules/FindOptiX.cmake

@@ -11,9 +11,13 @@
 #                     This can also be an environment variable.
 #  OPTIX_FOUND, If false, do not try to use OptiX.
 
-# If OPTIX_ROOT_DIR was defined in the environment, use it.
-IF(NOT OPTIX_ROOT_DIR AND NOT $ENV{OPTIX_ROOT_DIR} STREQUAL "")
+# If `OPTIX_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED OPTIX_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{OPTIX_ROOT_DIR})
   SET(OPTIX_ROOT_DIR $ENV{OPTIX_ROOT_DIR})
+ELSE()
+  SET(OPTIX_ROOT_DIR "")
 ENDIF()
 
 SET(_optix_SEARCH_DIRS

build_files/cmake/Modules/FindPCRE.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  PCRE_LIBRARY, where to find the PCRE library.
 
-# If PCRE_ROOT_DIR was defined in the environment, use it.
-IF(NOT PCRE_ROOT_DIR AND NOT $ENV{PCRE_ROOT_DIR} STREQUAL "")
+# If `PCRE_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED PCRE_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{PCRE_ROOT_DIR})
   SET(PCRE_ROOT_DIR $ENV{PCRE_ROOT_DIR})
+ELSE()
+  SET(PCRE_ROOT_DIR "")
 ENDIF()
 
 SET(_pcre_SEARCH_DIRS

build_files/cmake/Modules/FindPotrace.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  POTRACE_LIBRARY, where to find the POTRACE library.
 
-# If POTRACE_ROOT_DIR was defined in the environment, use it.
-IF(NOT POTRACE_ROOT_DIR AND NOT $ENV{POTRACE_ROOT_DIR} STREQUAL "")
+# If `POTRACE_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED POTRACE_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{POTRACE_ROOT_DIR})
   SET(POTRACE_ROOT_DIR $ENV{POTRACE_ROOT_DIR})
+ELSE()
+  SET(POTRACE_ROOT_DIR "")
 ENDIF()
 
 SET(_potrace_SEARCH_DIRS

build_files/cmake/Modules/FindPugiXML.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  PUGIXML_LIBRARY, where to find the PugiXML library.
 
-# If PUGIXML_ROOT_DIR was defined in the environment, use it.
-IF(NOT PUGIXML_ROOT_DIR AND NOT $ENV{PUGIXML_ROOT_DIR} STREQUAL "")
+# If `PUGIXML_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED PUGIXML_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{PUGIXML_ROOT_DIR})
   SET(PUGIXML_ROOT_DIR $ENV{PUGIXML_ROOT_DIR})
+ELSE()
+  SET(PUGIXML_ROOT_DIR "")
 ENDIF()
 
 SET(_pugixml_SEARCH_DIRS

build_files/cmake/Modules/FindPulse.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  LIBPULSE_LIBRARY, where to find the PulseAudio library.
 
-# If LIBPULSE_ROOT_DIR was defined in the environment, use it.
-IF(NOT LIBPULSE_ROOT_DIR AND NOT $ENV{LIBPULSE_ROOT_DIR} STREQUAL "")
+# If `LIBPULSE_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED LIBPULSE_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{LIBPULSE_ROOT_DIR})
   SET(LIBPULSE_ROOT_DIR $ENV{LIBPULSE_ROOT_DIR})
+ELSE()
+  SET(LIBPULSE_ROOT_DIR "")
 ENDIF()
 
 SET(_pulse_SEARCH_DIRS

build_files/cmake/Modules/FindPythonLibsUnix.cmake

@@ -27,9 +27,13 @@
 # also defined, but not for general use are
 #  PYTHON_LIBRARY, where to find the python library.
 
-# If PYTHON_ROOT_DIR was defined in the environment, use it.
-IF(NOT PYTHON_ROOT_DIR AND NOT $ENV{PYTHON_ROOT_DIR} STREQUAL "")
+# If `PYTHON_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED PYTHON_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{PYTHON_ROOT_DIR})
   SET(PYTHON_ROOT_DIR $ENV{PYTHON_ROOT_DIR})
+ELSE()
+  SET(PYTHON_ROOT_DIR "")
 ENDIF()
 
 SET(_PYTHON_VERSION_SUPPORTED 3.10)

build_files/cmake/Modules/FindSDL2.cmake

@@ -14,9 +14,13 @@
 # also defined, but not for general use are
 #  SDL2_LIBRARY, where to find the SDL library.
 
-# If SDL2_ROOT_DIR was defined in the environment, use it.
-IF(NOT SDL2_ROOT_DIR AND NOT $ENV{SDL2_ROOT_DIR} STREQUAL "")
+# If `SDL2_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED SDL2_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{SDL2_ROOT_DIR})
   SET(SDL2_ROOT_DIR $ENV{SDL2_ROOT_DIR})
+ELSE()
+  SET(SDL2_ROOT_DIR "")
 ENDIF()
 
 SET(_sdl2_SEARCH_DIRS

build_files/cmake/Modules/FindShaderC.cmake

@@ -13,9 +13,13 @@
 #  SHADERC_FOUND, If false, do not try to use ShaderC.
 #
 
-# If SHADERC_ROOT_DIR was defined in the environment, use it.
-IF(NOT SHADERC_ROOT_DIR AND NOT $ENV{SHADERC_ROOT_DIR} STREQUAL "")
+# If `SHADERC_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED SHADERC_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{SHADERC_ROOT_DIR})
   SET(SHADERC_ROOT_DIR $ENV{SHADERC_ROOT_DIR})
+ELSE()
+  SET(SHADERC_ROOT_DIR "")
 ENDIF()
 
 SET(_shaderc_SEARCH_DIRS

build_files/cmake/Modules/FindSndFile.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  LIBSNDFILE_LIBRARY, where to find the SndFile library.
 
-# If LIBSNDFILE_ROOT_DIR was defined in the environment, use it.
-IF(NOT LIBSNDFILE_ROOT_DIR AND NOT $ENV{LIBSNDFILE_ROOT_DIR} STREQUAL "")
+# If `LIBSNDFILE_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED LIBSNDFILE_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{LIBSNDFILE_ROOT_DIR})
   SET(LIBSNDFILE_ROOT_DIR $ENV{LIBSNDFILE_ROOT_DIR})
+ELSE()
+  SET(LIBSNDFILE_ROOT_DIR "")
 ENDIF()
 
 SET(_sndfile_SEARCH_DIRS

build_files/cmake/Modules/FindSpacenav.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  SPACENAV_LIBRARY, where to find the Spacenav library.
 
-# If SPACENAV_ROOT_DIR was defined in the environment, use it.
-IF(NOT SPACENAV_ROOT_DIR AND NOT $ENV{SPACENAV_ROOT_DIR} STREQUAL "")
+# If `SPACENAV_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED SPACENAV_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{SPACENAV_ROOT_DIR})
   SET(SPACENAV_ROOT_DIR $ENV{SPACENAV_ROOT_DIR})
+ELSE()
+  SET(SPACENAV_ROOT_DIR "")
 ENDIF()
 
 SET(_spacenav_SEARCH_DIRS

build_files/cmake/Modules/FindTBB.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  TBB_LIBRARY, where to find the TBB library.
 
-# If TBB_ROOT_DIR was defined in the environment, use it.
-IF(NOT TBB_ROOT_DIR AND NOT $ENV{TBB_ROOT_DIR} STREQUAL "")
+# If `TBB_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED TBB_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{TBB_ROOT_DIR})
   SET(TBB_ROOT_DIR $ENV{TBB_ROOT_DIR})
+ELSE()
+  SET(TBB_ROOT_DIR "")
 ENDIF()
 
 SET(_tbb_SEARCH_DIRS

build_files/cmake/Modules/FindUSD.cmake

@@ -13,9 +13,13 @@
 #  USD_FOUND, If false, do not try to use USD.
 #
 
-# If USD_ROOT_DIR was defined in the environment, use it.
-IF(NOT USD_ROOT_DIR AND NOT $ENV{USD_ROOT_DIR} STREQUAL "")
+# If `USD_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED USD_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{USD_ROOT_DIR})
   SET(USD_ROOT_DIR $ENV{USD_ROOT_DIR})
+ELSE()
+  SET(USD_ROOT_DIR "")
 ENDIF()
 
 SET(_usd_SEARCH_DIRS

build_files/cmake/Modules/FindVulkan.cmake

@@ -13,9 +13,13 @@
 #  VULKAN_FOUND, If false, do not try to use Vulkan.
 #
 
-# If VULKAN_ROOT_DIR was defined in the environment, use it.
-IF(NOT VULKAN_ROOT_DIR AND NOT $ENV{VULKAN_ROOT_DIR} STREQUAL "")
+# If `VULKAN_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED VULKAN_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{VULKAN_ROOT_DIR})
   SET(VULKAN_ROOT_DIR $ENV{VULKAN_ROOT_DIR})
+ELSE()
+  SET(VULKAN_ROOT_DIR "")
 ENDIF()
 
 SET(_vulkan_SEARCH_DIRS

build_files/cmake/Modules/FindWebP.cmake

@@ -14,9 +14,13 @@
 # also defined, but not for general use are
 #  WEBP_LIBRARY, where to find the WEBP library.
 
-# If WEBP_ROOT_DIR was defined in the environment, use it.
-IF(NOT WEBP_ROOT_DIR AND NOT $ENV{WEBP_ROOT_DIR} STREQUAL "")
+# If `WEBP_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED WEBP_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{WEBP_ROOT_DIR})
   SET(WEBP_ROOT_DIR $ENV{WEBP_ROOT_DIR})
+ELSE()
+  SET(WEBP_ROOT_DIR "")
 ENDIF()
 
 SET(_webp_SEARCH_DIRS

build_files/cmake/Modules/FindXML2.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  XML2_LIBRARY, where to find the XML2 library.
 
-# If XML2_ROOT_DIR was defined in the environment, use it.
-IF(NOT XML2_ROOT_DIR AND NOT $ENV{XML2_ROOT_DIR} STREQUAL "")
+# If `XML2_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED XML2_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{XML2_ROOT_DIR})
   SET(XML2_ROOT_DIR $ENV{XML2_ROOT_DIR})
+ELSE()
+  SET(XML2_ROOT_DIR "")
 ENDIF()
 
 SET(_xml2_SEARCH_DIRS

build_files/cmake/Modules/FindXR_OpenXR_SDK.cmake

@@ -23,9 +23,13 @@
 # also defined, but not for general use are
 #  XR_OPENXR_SDK_LOADER_LIBRARY, where to find the OpenXR-SDK loader library.
 
-# If XR_OPENXR_SDK_ROOT_DIR was defined in the environment, use it.
-IF(NOT XR_OPENXR_SDK_ROOT_DIR AND NOT $ENV{XR_OPENXR_SDK_ROOT_DIR} STREQUAL "")
+# If `XR_OPENXR_SDK_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED XR_OPENXR_SDK_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{XR_OPENXR_SDK_ROOT_DIR})
   SET(XR_OPENXR_SDK_ROOT_DIR $ENV{XR_OPENXR_SDK_ROOT_DIR})
+ELSE()
+  SET(XR_OPENXR_SDK_ROOT_DIR "")
 ENDIF()
 
 SET(_xr_openxr_sdk_SEARCH_DIRS

build_files/cmake/Modules/FindZstd.cmake

@@ -15,9 +15,13 @@
 # also defined, but not for general use are
 #  ZSTD_LIBRARY, where to find the Zstd library.
 
-# If ZSTD_ROOT_DIR was defined in the environment, use it.
-IF(NOT ZSTD_ROOT_DIR AND NOT $ENV{ZSTD_ROOT_DIR} STREQUAL "")
+# If `ZSTD_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED ZSTD_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{ZSTD_ROOT_DIR})
   SET(ZSTD_ROOT_DIR $ENV{ZSTD_ROOT_DIR})
+ELSE()
+  SET(ZSTD_ROOT_DIR "")
 ENDIF()
 
 SET(_zstd_SEARCH_DIRS

build_files/cmake/Modules/Findsse2neon.cmake

@@ -11,9 +11,13 @@
 #                     This can also be an environment variable.
 #  SSE2NEON_FOUND, If false, do not try to use sse2neon.
 
-# If SSE2NEON_ROOT_DIR was defined in the environment, use it.
-IF(NOT SSE2NEON_ROOT_DIR AND NOT $ENV{SSE2NEON_ROOT_DIR} STREQUAL "")
+# If `SSE2NEON_ROOT_DIR` was defined in the environment, use it.
+IF(DEFINED SSE2NEON_ROOT_DIR)
+  # Pass.
+ELSEIF(DEFINED ENV{SSE2NEON_ROOT_DIR})
   SET(SSE2NEON_ROOT_DIR $ENV{SSE2NEON_ROOT_DIR})
+ELSE()
+  SET(SSE2NEON_ROOT_DIR "")
 ENDIF()
 
 SET(_sse2neon_SEARCH_DIRS