graphics/brlcad: Fix build.

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

graphics/brlcad/brlcad.SlackBuild

@@ -60,10 +60,12 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+patch -p0 < $CWD/brlcad.patch
 mkdir -p build
 cd build
 # There is a "known issue" according to the guys on #brlcad and we need
 # the cmake define "-DBRLCAD_ENABLE_STRICT=OFF" for now
+LDFLAGS="-lpng16" \
 cmake \
     -DBRLCAD_FLAGS_OPTIMIZATION=ON \
     -DBRLCAD_ENABLE_STRICT=OFF \
@@ -85,7 +87,7 @@ cmake \
     -DBRLCAD_LIBVDS=BUNDLED \
     -DBRLCAD_OPENNURBS=BUNDLED \
     -DBRLCAD_PERPLEX=BUNDLED \
-    -DBRLCAD_PNG=BUNDLED \
+    -DBRLCAD_PNG=OFF \
     -DBRLCAD_RE2C=BUNDLED \
     -DBRLCAD_SCL=BUNDLED \
     -DBRLCAD_TKHTML=BUNDLED \

graphics/brlcad/brlcad.patch

@@ -0,0 +1,43 @@
+--- CMakeLists.txt
++++ CMakeLists.txt
+@@ -2079,16 +2079,10 @@ if(NOT BRLCAD_IS_SUBBUILD)
+     list(REMOVE_DUPLICATES CMAKE_EXTERNAL_TARGET_LIST)
+   endif(CMAKE_EXTERNAL_TARGET_LIST)
+   foreach(libtarget ${CMAKE_LIBRARY_TARGET_LIST})
+-    #TODO - can this locate test be replaced with if(TARGET ${libtarget}) ?
+-    if(NOT CMAKE_BUILD_TYPE)
+-      get_target_property(target_location ${libtarget} LOCATION)
+-    else(NOT CMAKE_BUILD_TYPE)
+-      get_target_property(target_location ${libtarget} LOCATION_${CMAKE_BUILD_TYPE})
+-    endif(NOT CMAKE_BUILD_TYPE)
+-    if(target_location)
++    if(TARGET ${libtarget})
+       add_dependencies(${libtarget} timestamp)
+       add_dependencies(buildtimedelta ${libtarget})
+-    endif(target_location)
++    endif(TARGET ${libtarget})
+   endforeach(libtarget ${CMAKE_LIBRARY_TARGET_LIST})
+   foreach(exectarget ${CMAKE_EXEC_TARGET_LIST})
+     if(NOT CMAKE_BUILD_TYPE)
+--- misc/CMake/BRLCAD_CMakeFiles.cmake
++++ misc/CMake/BRLCAD_CMakeFiles.cmake
+@@ -65,7 +65,7 @@ macro(CMAKEFILES)
+       # make sure the file is there.  Normally attempting to ignore
+       # a non-existent file is a fatal error, but these keywords
+       # don't necessarily refer to files.
+-      set(TARGET_FLAGS SHARED STATIC OBJECT WIN32 UNKNOWN IMPORTED)
++      set(TARGET_FLAGS SHARED STATIC OBJECT WIN32 UNKNOWN IMPORTED MODULE INTERFACE)
+       foreach(TARGET_FLAG ${TARGET_FLAGS})
+ 	if("${TARGET_FLAG}" STREQUAL "${ITEM}")
+ 	  if(NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${ITEM})
+--- src/libpc/CMakeLists.txt
++++ src/libpc/CMakeLists.txt
+@@ -58,6 +58,7 @@ set(LIBPC_SOURCES
+ 
+ add_definitions(
+   -DOBJ_BREP=1
++  -DBOOST_DETAIL_NO_CONTAINER_FWD
+   )
+ 
+ BRLCAD_ADDLIB(libpc "${LIBPC_SOURCES}" "libbu;${OPENNURBS_LIBRARY};${STDCXX_LIBRARIES}" NO_STRICT_CXX)
+