Don't depend on fake fmt::fmt

Signed-off-by: Dominik Wójt <domin144@o2.pl>

Author: domin144

src/cmake/externalpackages.cmake

@@ -351,7 +351,6 @@ macro (find_or_download_fmt)
         set (FMT_INCLUDE_DIR "${FMT_INSTALL_DIR}/include")
         set (OIIO_USING_FMT_LOCAL TRUE)
         set (fmt_VERSION ${BUILD_FMT_VERSION})
-        add_library(fmt::fmt INTERFACE IMPORTED)
     else ()
         get_target_property(FMT_INCLUDE_DIR fmt::fmt INTERFACE_INCLUDE_DIRECTORIES)
         set (OIIO_USING_FMT_LOCAL FALSE)

src/include/CMakeLists.txt

@@ -87,7 +87,7 @@ if (INTERNALIZE_FMT OR OIIO_USING_FMT_LOCAL)
                             ${fmt_headers}
                             ${fmt_internal_directory})
     add_custom_target (fmt_internal DEPENDS ${fmt_headers_internal})
-    add_dependencies (fmt::fmt fmt_internal)
+    set(fmt_target fmt_internal)
 else ()
     set (fmt_headers
          ${CMAKE_BINARY_DIR}/include/OpenImageIO/detail/fmt/format.h
@@ -102,6 +102,7 @@ else ()
         file (WRITE "${CMAKE_BINARY_DIR}/include/OpenImageIO/detail/fmt/std.h"
                     "#include <fmt/std.h>")
     endif ()
+    set(fmt_target fmt::fmt)
 endif ()
 install (FILES ${fmt_headers}
          DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}/detail/fmt

src/libOpenImageIO/CMakeLists.txt

@@ -143,7 +143,7 @@ target_link_libraries (OpenImageIO
             OpenImageIO_Util
             ${OPENIMAGEIO_IMATH_DEPENDENCY_VISIBILITY}
             ${OPENIMAGEIO_IMATH_TARGETS}
-            fmt::fmt
+            ${fmt_target}
         PRIVATE
             ${OPENIMAGEIO_OPENEXR_TARGETS}
             ${OpenCV_LIBRARIES}

src/libutil/CMakeLists.txt

@@ -20,7 +20,7 @@ target_link_libraries (OpenImageIO_Util
             ${GCC_ATOMIC_LIBRARIES}
             ${OPENIMAGEIO_IMATH_DEPENDENCY_VISIBILITY}
             ${OPENIMAGEIO_IMATH_TARGETS}
-            fmt::fmt
+            ${fmt_target}
         PRIVATE
             $<TARGET_NAME_IF_EXISTS:Boost::filesystem>
             $<TARGET_NAME_IF_EXISTS:Boost::thread>