CMake cleanup: Move OSL detection code into FindOpenShadingLanguage.cmake

Should be no functional changes.

2 files changed, 109 insertions, 31 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 15356e3445c..026386a876b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -928,38 +928,18 @@ if(UNIX AND NOT APPLE)
 
 	if(WITH_CYCLES_OSL)
 		set(CYCLES_OSL ${LIBDIR}/osl CACHE PATH "Path to OpenShadingLanguage installation")
-
-		message(STATUS "CYCLES_OSL = ${CYCLES_OSL}")
-
-		# TODO(sergey): Move to dedicated FindOpenShadingLanguage.cmake
-		find_library(OSL_LIB_EXEC NAMES oslexec PATHS ${CYCLES_OSL}/lib)
-		find_library(OSL_LIB_COMP NAMES oslcomp PATHS ${CYCLES_OSL}/lib)
-		find_library(OSL_LIB_QUERY NAMES oslquery PATHS ${CYCLES_OSL}/lib)
-		find_path(OSL_INCLUDE_DIR OSL/oslclosure.h PATHS ${CYCLES_OSL}/include)
-		find_program(OSL_COMPILER NAMES oslc PATHS ${CYCLES_OSL}/bin)
-		if(EXISTS ${OSL_INCLUDE_DIR})
-			file(STRINGS "${OSL_INCLUDE_DIR}/OSL/oslversion.h" OSL_LIBRARY_VERSION_MAJOR
-			     REGEX "^[ \t]*#define[ \t]+OSL_LIBRARY_VERSION_MAJOR[ \t]+[0-9]+.*$")
-			file(STRINGS "${OSL_INCLUDE_DIR}/OSL/oslversion.h" OSL_LIBRARY_VERSION_MINOR
-			     REGEX "^[ \t]*#define[ \t]+OSL_LIBRARY_VERSION_MINOR[ \t]+[0-9]+.*$")
-			string(REGEX REPLACE ".*#define[ \t]+OSL_LIBRARY_VERSION_MAJOR[ \t]+([.0-9]+).*"
-			       "\\1" OSL_LIBRARY_VERSION_MAJOR ${OSL_LIBRARY_VERSION_MAJOR})
-			string(REGEX REPLACE ".*#define[ \t]+OSL_LIBRARY_VERSION_MINOR[ \t]+([.0-9]+).*"
-			       "\\1" OSL_LIBRARY_VERSION_MINOR ${OSL_LIBRARY_VERSION_MINOR})
-		endif()
-
-		if(${OSL_LIBRARY_VERSION_MAJOR} EQUAL "1" AND ${OSL_LIBRARY_VERSION_MINOR} LESS "6")
-			# Note: --whole-archive is needed to force loading of all symbols in liboslexec,
-			# otherwise LLVM is missing the osl_allocate_closure_component function
-			list(APPEND OSL_LIBRARIES ${OSL_LIB_COMP} -Wl,--whole-archive ${OSL_LIB_EXEC} -Wl,--no-whole-archive ${OSL_LIB_QUERY})
-		else()
-			list(APPEND OSL_LIBRARIES ${OSL_LIB_COMP} ${OSL_LIB_EXEC} ${OSL_LIB_QUERY})
-		endif()
-
-		if(OSL_INCLUDE_DIR AND OSL_LIBRARIES AND OSL_COMPILER)
-			set(OSL_FOUND TRUE)
+		if(NOT OSL_ROOT)
+			set(OSL_ROOT ${CYCLES_OSL})
+		endif()
+		find_package_wrapper(OpenShadingLanguage)
+		if(OSL_FOUND)
+			if(${OSL_LIBRARY_VERSION_MAJOR} EQUAL "1" AND ${OSL_LIBRARY_VERSION_MINOR} LESS "6")
+				# Note: --whole-archive is needed to force loading of all symbols in liboslexec,
+				# otherwise LLVM is missing the osl_allocate_closure_component function
+				set(OSL_LIBRARIES ${OSL_OSLCOMP_LIBRARY} -Wl,--whole-archive ${OSL_OSLEXEC_LIBRARY} -Wl,--no-whole-archive ${OSL_OSLQUERY_LIBRARY})
+			endif()
 		else()
-			message(STATUS "OSL not found")
+			message(STATUS "OSL not found, disabling it from Cycles")
 			set(WITH_CYCLES_OSL OFF)
 		endif()
 	endif()
diff --git a/build_files/cmake/Modules/FindOpenShadingLanguage.cmake b/build_files/cmake/Modules/FindOpenShadingLanguage.cmake
new file mode 100644
index 00000000000..824d0f90597
--- /dev/null
+++ b/build_files/cmake/Modules/FindOpenShadingLanguage.cmake
@@ -0,0 +1,98 @@
+# - Find OpenShadingLanguage library
+# Find the native OpenShadingLanguage includes and library
+# This module defines
+#  OSL_INCLUDE_DIRS, where to find OSL headers, Set when
+#                    OSL_INCLUDE_DIR is found.
+#  OSL_LIBRARIES, libraries to link against to use OSL.
+#  OSL_ROOT_DIR, the base directory to search for OSL.
+#                This can also be an environment variable.
+#  OSL_COMPILER, full path to OSL script compiler.
+#  OSL_FOUND, if false, do not try to use OSL.
+#  OSL_LIBRARY_VERSION_MAJOR, OSL_LIBRARY_VERSION_MINOR,  the major
+#                and minor versions of OSL library if found.
+#
+#=============================================================================
+# Copyright 2014 Blender Foundation.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+
+# If OSL_ROOT_DIR was defined in the environment, use it.
+IF(NOT OSL_ROOT_DIR AND NOT $ENV{OSL_ROOT_DIR} STREQUAL "")
+  SET(OSL_ROOT_DIR $ENV{OSL_ROOT_DIR})
+ENDIF()
+
+SET(_osl_FIND_COMPONENTS
+  oslcomp
+  oslexec
+  oslquery
+)
+
+SET(_osl_SEARCH_DIRS
+  ${OSL_ROOT_DIR}
+  /usr/local
+  /sw # Fink
+  /opt/local # DarwinPorts
+  /opt/csw # Blastwave
+  /opt/lib/osl
+)
+
+FIND_PATH(OSL_INCLUDE_DIR
+  NAMES
+    OSL/oslversion.h
+  HINTS
+    ${_osl_SEARCH_DIRS}
+  PATH_SUFFIXES
+    include
+)
+
+SET(_osl_LIBRARIES)
+FOREACH(COMPONENT ${_osl_FIND_COMPONENTS})
+  STRING(TOUPPER ${COMPONENT} UPPERCOMPONENT)
+
+  FIND_LIBRARY(OSL_${UPPERCOMPONENT}_LIBRARY
+    NAMES
+      ${COMPONENT}
+    HINTS
+      ${_osl_SEARCH_DIRS}
+    PATH_SUFFIXES
+      lib64 lib
+    )
+  LIST(APPEND _osl_LIBRARIES "${OSL_${UPPERCOMPONENT}_LIBRARY}")
+ENDFOREACH()
+
+FIND_PROGRAM(OSL_COMPILER oslc
+             HINTS ${_osl_SEARCH_DIRS}
+             PATH_SUFFIXES bin)
+
+# handle the QUIETLY and REQUIRED arguments and set OSL_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(OSL DEFAULT_MSG _osl_LIBRARIES OSL_INCLUDE_DIR OSL_COMPILER)
+
+IF(OSL_FOUND)
+  SET(OSL_LIBRARIES ${_osl_LIBRARIES})
+  SET(OSL_INCLUDE_DIRS ${OSL_INCLUDE_DIR})
+
+  FILE(STRINGS "${OSL_INCLUDE_DIR}/OSL/oslversion.h" OSL_LIBRARY_VERSION_MAJOR
+       REGEX "^[ \t]*#define[ \t]+OSL_LIBRARY_VERSION_MAJOR[ \t]+[0-9]+.*$")
+  FILE(STRINGS "${OSL_INCLUDE_DIR}/OSL/oslversion.h" OSL_LIBRARY_VERSION_MINOR
+       REGEX "^[ \t]*#define[ \t]+OSL_LIBRARY_VERSION_MINOR[ \t]+[0-9]+.*$")
+  STRING(REGEX REPLACE ".*#define[ \t]+OSL_LIBRARY_VERSION_MAJOR[ \t]+([.0-9]+).*"
+         "\\1" OSL_LIBRARY_VERSION_MAJOR ${OSL_LIBRARY_VERSION_MAJOR})
+  STRING(REGEX REPLACE ".*#define[ \t]+OSL_LIBRARY_VERSION_MINOR[ \t]+([.0-9]+).*"
+         "\\1" OSL_LIBRARY_VERSION_MINOR ${OSL_LIBRARY_VERSION_MINOR})
+ENDIF(OSL_FOUND)
+
+MARK_AS_ADVANCED(
+  OSL_INCLUDE_DIR
+)
+FOREACH(COMPONENT ${_osl_FIND_COMPONENTS})
+  STRING(TOUPPER ${COMPONENT} UPPERCOMPONENT)
+  MARK_AS_ADVANCED(OSL_${UPPERCOMPONENT}_LIBRARY)
+ENDFOREACH()