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Use pkg-config to find IlmBase, when possible. #2

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366 changes: 192 additions & 174 deletions src/cmake/modules/FindIlmBase.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -20,195 +20,213 @@
# ILMBASE_LIBRARIES - list of libraries to link against when using IlmBase.
# ILMBASE_FOUND - True if IlmBase was found.

unset(ILMBASE_FOUND)

if (NOT ILMBASE_CUSTOM)
# Try pkg-config first

find_package(PkgConfig)

pkg_check_modules(ILMBASE IlmBase)

if(ILMBASE_FOUND)
set(ILMBASE_INCLUDE_DIR ${ILMBASE_INCLUDE_DIRS})
endif(ILMBASE_FOUND)

endif (NOT ILMBASE_CUSTOM)

# Other standarnd issue macros
include (FindPackageHandleStandardArgs)
include (FindPackageMessage)
include (SelectLibraryConfigurations)


# Macro to assemble a helper state variable
macro (SET_STATE_VAR varname)
set (tmp_ilmbaselibs ${ILMBASE_CUSTOM_LIBRARIES})
separate_arguments (tmp_ilmbaselibs)
set (tmp_lst
${ILMBASE_CUSTOM} | ${tmp_ilmbaselibs} |
${ILMBASE_HOME} | ${ILMBASE_VERSION} | ${ILMBASE_LIB_AREA}
)
set (${varname} "${tmp_lst}")
unset (tmp_ilmbaselibs)
unset (tmp_lst)
endmacro ()

# To enforce that find_* functions do not use inadvertently existing versions
if (ILMBASE_CUSTOM)
set (ILMBASE_FIND_OPTIONS "NO_DEFAULT_PATH")
endif ()

# Macro to search for an include directory
macro (PREFIX_FIND_INCLUDE_DIR prefix includefile libpath_var)
string (TOUPPER ${prefix}_INCLUDE_DIR tmp_varname)
find_path(${tmp_varname} ${includefile}
HINTS ${${libpath_var}}
PATH_SUFFIXES include
${ILMBASE_FIND_OPTIONS}
)
if (${tmp_varname})
mark_as_advanced (${tmp_varname})
if(NOT ILMBASE_FOUND)
include (SelectLibraryConfigurations)


# Macro to assemble a helper state variable
macro (SET_STATE_VAR varname)
set (tmp_ilmbaselibs ${ILMBASE_CUSTOM_LIBRARIES})
separate_arguments (tmp_ilmbaselibs)
set (tmp_lst
${ILMBASE_CUSTOM} | ${tmp_ilmbaselibs} |
${ILMBASE_HOME} | ${ILMBASE_VERSION} | ${ILMBASE_LIB_AREA}
)
set (${varname} "${tmp_lst}")
unset (tmp_ilmbaselibs)
unset (tmp_lst)
endmacro ()

# To enforce that find_* functions do not use inadvertently existing versions
if (ILMBASE_CUSTOM)
set (ILMBASE_FIND_OPTIONS "NO_DEFAULT_PATH")
endif ()
unset (tmp_varname)
endmacro ()


# Macro to search for the given library and adds the cached
# variable names to the specified list
macro (PREFIX_FIND_LIB prefix libname libpath_var liblist_var cachelist_var)
string (TOUPPER ${prefix}_${libname} tmp_prefix)
find_library(${tmp_prefix}_LIBRARY_RELEASE
NAMES ${libname}
HINTS ${${libpath_var}}
PATH_SUFFIXES lib
${ILMBASE_FIND_OPTIONS}
)
find_library(${tmp_prefix}_LIBRARY_DEBUG
NAMES ${libname}d ${libname}_d ${libname}debug ${libname}_debug
HINTS ${${libpath_var}}
PATH_SUFFIXES lib
${ILMBASE_FIND_OPTIONS}
)
# Properly define ${tmp_prefix}_LIBRARY (cached) and ${tmp_prefix}_LIBRARIES
select_library_configurations (${tmp_prefix})
list (APPEND ${liblist_var} ${tmp_prefix}_LIBRARIES)

# Add to the list of variables which should be reset
list (APPEND ${cachelist_var}
${tmp_prefix}_LIBRARY
${tmp_prefix}_LIBRARY_RELEASE
${tmp_prefix}_LIBRARY_DEBUG)
mark_as_advanced (
${tmp_prefix}_LIBRARY
${tmp_prefix}_LIBRARY_RELEASE
${tmp_prefix}_LIBRARY_DEBUG)
unset (tmp_prefix)
endmacro ()


# Encode the current state of the external variables into a string
SET_STATE_VAR (ILMBASE_CURRENT_STATE)

# If the state has changed, clear the cached variables
if (ILMBASE_CACHED_STATE AND
NOT ILMBASE_CACHED_STATE STREQUAL ILMBASE_CURRENT_STATE)

foreach (libvar ${ILMBASE_CACHED_VARS})
unset (${libvar} CACHE)
endforeach ()
endif ()

# Macro to search for an include directory
macro (PREFIX_FIND_INCLUDE_DIR prefix includefile libpath_var)
string (TOUPPER ${prefix}_INCLUDE_DIR tmp_varname)
find_path(${tmp_varname} ${includefile}
HINTS ${${libpath_var}}
PATH_SUFFIXES include
${ILMBASE_FIND_OPTIONS}
)
if (${tmp_varname})
mark_as_advanced (${tmp_varname})
endif ()
unset (tmp_varname)
endmacro ()


# Macro to search for the given library and adds the cached
# variable names to the specified list
macro (PREFIX_FIND_LIB prefix libname libpath_var liblist_var cachelist_var)
string (TOUPPER ${prefix}_${libname} tmp_prefix)
find_library(${tmp_prefix}_LIBRARY_RELEASE
NAMES ${libname}
HINTS ${${libpath_var}}
PATH_SUFFIXES lib
${ILMBASE_FIND_OPTIONS}
)
find_library(${tmp_prefix}_LIBRARY_DEBUG
NAMES ${libname}d ${libname}_d ${libname}debug ${libname}_debug
HINTS ${${libpath_var}}
PATH_SUFFIXES lib
${ILMBASE_FIND_OPTIONS}
)
# Properly define ${tmp_prefix}_LIBRARY (cached) and ${tmp_prefix}_LIBRARIES
select_library_configurations (${tmp_prefix})
list (APPEND ${liblist_var} ${tmp_prefix}_LIBRARIES)

# Add to the list of variables which should be reset
list (APPEND ${cachelist_var}
${tmp_prefix}_LIBRARY
${tmp_prefix}_LIBRARY_RELEASE
${tmp_prefix}_LIBRARY_DEBUG)
mark_as_advanced (
${tmp_prefix}_LIBRARY
${tmp_prefix}_LIBRARY_RELEASE
${tmp_prefix}_LIBRARY_DEBUG)
unset (tmp_prefix)
endmacro ()


# Encode the current state of the external variables into a string
SET_STATE_VAR (ILMBASE_CURRENT_STATE)

# If the state has changed, clear the cached variables
if (ILMBASE_CACHED_STATE AND
NOT ILMBASE_CACHED_STATE STREQUAL ILMBASE_CURRENT_STATE)

# Generic search paths
set (IlmBase_generic_include_paths
${ILMBASE_CUSTOM_INCLUDE_DIR}
/usr/include
/usr/include/${CMAKE_LIBRARY_ARCHITECTURE}
/usr/local/include
/sw/include
/opt/local/include)
set (IlmBase_generic_library_paths
${ILMBASE_CUSTOM_LIB_DIR}
/usr/lib
/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}
/usr/local/lib
/sw/lib
/opt/local/lib)

# Search paths for the IlmBase files
if (ILMBASE_HOME)
if (ILMBASE_VERSION)
set (IlmBase_include_paths
${ILMBASE_HOME}/ilmbase-${ILMBASE_VERSION}/include
${ILMBASE_HOME}/include/ilmbase-${ILMBASE_VERSION})
foreach (libvar ${ILMBASE_CACHED_VARS})
unset (${libvar} CACHE)
endforeach ()
endif ()


# Generic search paths
set (IlmBase_generic_include_paths
${ILMBASE_CUSTOM_INCLUDE_DIR}
/usr/include
/usr/include/${CMAKE_LIBRARY_ARCHITECTURE}
/usr/local/include
/sw/include
/opt/local/include)
set (IlmBase_generic_library_paths
${ILMBASE_CUSTOM_LIB_DIR}
/usr/lib
/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}
/usr/local/lib
/sw/lib
/opt/local/lib)

# Search paths for the IlmBase files
if (ILMBASE_HOME)
if (ILMBASE_VERSION)
set (IlmBase_include_paths
${ILMBASE_HOME}/ilmbase-${ILMBASE_VERSION}/include
${ILMBASE_HOME}/include/ilmbase-${ILMBASE_VERSION})
set (IlmBase_library_paths
${ILMBASE_HOME}/ilmbase-${ILMBASE_VERSION}/lib
${ILMBASE_HOME}/lib/ilmbase-${ILMBASE_VERSION})
endif()
list (APPEND IlmBase_include_paths ${ILMBASE_HOME}/include)
set (IlmBase_library_paths
${ILMBASE_HOME}/ilmbase-${ILMBASE_VERSION}/lib
${ILMBASE_HOME}/lib/ilmbase-${ILMBASE_VERSION})
endif()
list (APPEND IlmBase_include_paths ${ILMBASE_HOME}/include)
set (IlmBase_library_paths
${ILMBASE_HOME}/lib
${ILMBASE_HOME}/lib64
${ILMBASE_LIB_AREA}
${IlmBase_library_paths})
endif ()
list (APPEND IlmBase_include_paths ${IlmBase_generic_include_paths})
list (APPEND IlmBase_library_paths ${IlmBase_generic_library_paths})

# Locate the header files
PREFIX_FIND_INCLUDE_DIR (IlmBase
OpenEXR/IlmBaseConfig.h IlmBase_include_paths)

if (ILMBASE_INCLUDE_DIR)
# Get the version from config file, if not already set.
if (NOT ILMBASE_VERSION)
FILE(STRINGS "${ILMBASE_INCLUDE_DIR}/OpenEXR/IlmBaseConfig.h" ILMBASE_BUILD_SPECIFICATION
REGEX "^[ \t]*#define[ \t]+ILMBASE_VERSION_STRING[ \t]+\"[.0-9]+\".*$")

if(ILMBASE_BUILD_SPECIFICATION)
message(STATUS "${ILMBASE_BUILD_SPECIFICATION}")
string(REGEX REPLACE ".*#define[ \t]+ILMBASE_VERSION_STRING[ \t]+\"([.0-9]+)\".*"
"\\1" XYZ ${ILMBASE_BUILD_SPECIFICATION})
set("ILMBASE_VERSION" ${XYZ} CACHE STRING "Version of ILMBase lib")
else()
# Old versions (before 2.0?) do not have any version string, just assuming 2.0 should be fine though.
message(WARNING "Could not determine ILMBase library version, assuming 2.0.")
set("ILMBASE_VERSION" "2.0" CACHE STRING "Version of ILMBase lib")
${ILMBASE_HOME}/lib
${ILMBASE_HOME}/lib64
${ILMBASE_LIB_AREA}
${IlmBase_library_paths})
endif ()
list (APPEND IlmBase_include_paths ${IlmBase_generic_include_paths})
list (APPEND IlmBase_library_paths ${IlmBase_generic_library_paths})

# Locate the header files
PREFIX_FIND_INCLUDE_DIR (IlmBase
OpenEXR/IlmBaseConfig.h IlmBase_include_paths)

if (ILMBASE_INCLUDE_DIR)
# Get the version from config file, if not already set.
if (NOT ILMBASE_VERSION)
FILE(STRINGS "${ILMBASE_INCLUDE_DIR}/OpenEXR/IlmBaseConfig.h" ILMBASE_BUILD_SPECIFICATION
REGEX "^[ \t]*#define[ \t]+ILMBASE_VERSION_STRING[ \t]+\"[.0-9]+\".*$")

if(ILMBASE_BUILD_SPECIFICATION)
message(STATUS "${ILMBASE_BUILD_SPECIFICATION}")
string(REGEX REPLACE ".*#define[ \t]+ILMBASE_VERSION_STRING[ \t]+\"([.0-9]+)\".*"
"\\1" XYZ ${ILMBASE_BUILD_SPECIFICATION})
set("ILMBASE_VERSION" ${XYZ} CACHE STRING "Version of ILMBase lib")
else()
# Old versions (before 2.0?) do not have any version string, just assuming 2.0 should be fine though.
message(WARNING "Could not determine ILMBase library version, assuming 2.0.")
set("ILMBASE_VERSION" "2.0" CACHE STRING "Version of ILMBase lib")
endif()
endif()
endif()
endif ()
endif ()


if (ILMBASE_CUSTOM)
if (NOT ILMBASE_CUSTOM_LIBRARIES)
message (FATAL_ERROR "Custom IlmBase libraries requested but ILMBASE_CUSTOM_LIBRARIES is not set.")
endif()
set (IlmBase_Libraries ${ILMBASE_CUSTOM_LIBRARIES})
separate_arguments(IlmBase_Libraries)
#else ()
elseif (${ILMBASE_VERSION} VERSION_LESS "2.1")
set (IlmBase_Libraries Half Iex Imath IlmThread)
else ()
string(REGEX REPLACE "([0-9]+)[.]([0-9]+).*" "\\1_\\2" _ilmbase_libs_ver ${ILMBASE_VERSION})
set (IlmBase_Libraries Half Iex-${_ilmbase_libs_ver} Imath-${_ilmbase_libs_ver} IlmThread-${_ilmbase_libs_ver})
endif ()
if (ILMBASE_CUSTOM)
if (NOT ILMBASE_CUSTOM_LIBRARIES)
message (FATAL_ERROR "Custom IlmBase libraries requested but ILMBASE_CUSTOM_LIBRARIES is not set.")
endif()
set (IlmBase_Libraries ${ILMBASE_CUSTOM_LIBRARIES})
separate_arguments(IlmBase_Libraries)
#else ()
elseif (${ILMBASE_VERSION} VERSION_LESS "2.1")
set (IlmBase_Libraries Half Iex Imath IlmThread)
else ()
string(REGEX REPLACE "([0-9]+)[.]([0-9]+).*" "\\1_\\2" _ilmbase_libs_ver ${ILMBASE_VERSION})
set (IlmBase_Libraries Half Iex-${_ilmbase_libs_ver} Imath-${_ilmbase_libs_ver} IlmThread-${_ilmbase_libs_ver})
endif ()


# Locate the IlmBase libraries
set (IlmBase_libvars "")
set (IlmBase_cachevars "")
foreach (ilmbase_lib ${IlmBase_Libraries})
PREFIX_FIND_LIB (IlmBase ${ilmbase_lib}
IlmBase_library_paths IlmBase_libvars IlmBase_cachevars)
endforeach ()
# Create the list of variables that might need to be cleared
set (ILMBASE_CACHED_VARS
ILMBASE_INCLUDE_DIR ${IlmBase_cachevars}
CACHE INTERNAL "Variables set by FindIlmBase.cmake" FORCE)

# Store the current state so that variables might be cleared if required
set (ILMBASE_CACHED_STATE ${ILMBASE_CURRENT_STATE}
CACHE INTERNAL "State last seen by FindIlmBase.cmake" FORCE)

# Link with pthreads if required
if (NOT WIN32 AND EXISTS ${ILMBASE_INCLUDE_DIR}/OpenEXR/IlmBaseConfig.h)
file (STRINGS ${ILMBASE_INCLUDE_DIR}/OpenEXR/IlmBaseConfig.h
ILMBASE_HAVE_PTHREAD
REGEX "^[ \\t]*#define[ \\t]+HAVE_PTHREAD[ \\t]1[ \\t]*\$"
)
if (ILMBASE_HAVE_PTHREAD)
find_package (Threads)
if (CMAKE_USE_PTHREADS_INIT)
set (ILMBASE_PTHREADS ${CMAKE_THREAD_LIBS_INIT})
# Locate the IlmBase libraries
set (IlmBase_libvars "")
set (IlmBase_cachevars "")
foreach (ilmbase_lib ${IlmBase_Libraries})
PREFIX_FIND_LIB (IlmBase ${ilmbase_lib}
IlmBase_library_paths IlmBase_libvars IlmBase_cachevars)
endforeach ()
# Create the list of variables that might need to be cleared
set (ILMBASE_CACHED_VARS
ILMBASE_INCLUDE_DIR ${IlmBase_cachevars}
CACHE INTERNAL "Variables set by FindIlmBase.cmake" FORCE)

# Store the current state so that variables might be cleared if required
set (ILMBASE_CACHED_STATE ${ILMBASE_CURRENT_STATE}
CACHE INTERNAL "State last seen by FindIlmBase.cmake" FORCE)

# Link with pthreads if required
if (NOT WIN32 AND EXISTS ${ILMBASE_INCLUDE_DIR}/OpenEXR/IlmBaseConfig.h)
file (STRINGS ${ILMBASE_INCLUDE_DIR}/OpenEXR/IlmBaseConfig.h
ILMBASE_HAVE_PTHREAD
REGEX "^[ \\t]*#define[ \\t]+HAVE_PTHREAD[ \\t]1[ \\t]*\$"
)
if (ILMBASE_HAVE_PTHREAD)
find_package (Threads)
if (CMAKE_USE_PTHREADS_INIT)
set (ILMBASE_PTHREADS ${CMAKE_THREAD_LIBS_INIT})
endif ()
endif ()
endif ()
endif ()
endif()

# Use the standard function to handle ILMBASE_FOUND
FIND_PACKAGE_HANDLE_STANDARD_ARGS (IlmBase DEFAULT_MSG
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