1 ###########################################################################
5 # This file is part of Starlight.
7 # Starlight is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # Starlight is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Starlight. If not, see <http://www.gnu.org/licenses/>.
20 ###########################################################################
22 # File and Version Information:
23 # $Rev:: $: revision of last commit
24 # $Author:: $: author of last commit
25 # $Date:: $: date of last commit
28 # cmake module for finding ROOT installation
29 # requires root-config to be in PATH
30 # based on AliRoots's FindROOT.cmake (r41015)
31 # in https://alisoft.cern.ch/AliRoot/trunk/cmake/modules
33 # following variables are defined:
34 # ROOT_CONFIG_EXECUTABLE - path to root-config program
35 # ROOTSYS - path to root installation directory
36 # ROOT_TARGET - target architecture
37 # ROOT_F77 - Fortran complier used building ROOT
38 # ROOT_CC - C complier used building ROOT
39 # ROOT_CPP - C++ complier used building ROOT
40 # ROOT_VERSION - ROOT version
41 # ROOT_SVN_REVISION - ROOT subversion revision
42 # ROOT_BIN_DIR - ROOT executable directory
43 # ROOT_INCLUDE_DIR - ROOT header directory
44 # ROOT_LIBRARY_DIR - ROOT library directory
45 # ROOT_LIBRARIES - linker flags for ROOT libraries
46 # ROOT_AUX_LIBRARIES - linker flags for auxiliary libraries
47 # ROOTCINT_EXECUTABLE - path to rootcint program
48 # ROOT_MAJOR_VERSION - ROOT major version
49 # ROOT_MINOR_VERSION - ROOT minor version
50 # ROOT_PATCH_VERSION - ROOT patch level
51 # ROOT_LIBS - list of ROOT library files
54 # find_package(ROOT 5.26 REQUIRED Minuit2)
57 # The module also provides a function to generate ROOT dictionaries.
59 # set(ROOTPWA_DICTIONARY ${CMAKE_CURRENT_BINARY_DIR}/someDict.cc) # set dictionary path
60 # root_generate_dictionary(
61 # "${ROOTPWA_DICTIONARY}" # path to dictionary to generate
62 # "${INCLUDE_DIR1};${INCLUDE_DIR2}" # list of includes
63 # "class1.h;class2.h;class3.h" # list of classes to process
64 # "someLinkDef.h" # ROOT linkDef file
66 # set(SOURCES ${SOURCES} ${ROOTPWA_DICTIONARY}) # append dictionary to sources
69 ###########################################################################
73 set(ROOT_ERROR_REASON "")
74 set(ROOT_DEFINITIONS "")
78 find_program(ROOT_CONFIG_EXECUTABLE root-config)
79 if(NOT ROOT_CONFIG_EXECUTABLE)
80 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} Cannot find root-config.")
86 COMMAND ${ROOT_CONFIG_EXECUTABLE} --prefix
87 OUTPUT_VARIABLE ROOTSYS
88 OUTPUT_STRIP_TRAILING_WHITESPACE)
91 COMMAND ${ROOT_CONFIG_EXECUTABLE} --arch
92 OUTPUT_VARIABLE ROOT_TARGET
93 OUTPUT_STRIP_TRAILING_WHITESPACE)
96 COMMAND ${ROOT_CONFIG_EXECUTABLE} --f77
97 OUTPUT_VARIABLE ROOT_F77
98 OUTPUT_STRIP_TRAILING_WHITESPACE)
101 COMMAND ${ROOT_CONFIG_EXECUTABLE} --cc
102 OUTPUT_VARIABLE ROOT_CC
103 OUTPUT_STRIP_TRAILING_WHITESPACE)
106 COMMAND ${ROOT_CONFIG_EXECUTABLE} --cxx
107 OUTPUT_VARIABLE ROOT_CPP
108 OUTPUT_STRIP_TRAILING_WHITESPACE)
111 COMMAND ${ROOT_CONFIG_EXECUTABLE} --version
112 OUTPUT_VARIABLE ROOT_VERSION
113 OUTPUT_STRIP_TRAILING_WHITESPACE)
116 COMMAND ${ROOT_CONFIG_EXECUTABLE} --svn-revision
117 OUTPUT_VARIABLE ROOT_SVN_REVISION
118 OUTPUT_STRIP_TRAILING_WHITESPACE)
121 COMMAND ${ROOT_CONFIG_EXECUTABLE} --bindir
122 OUTPUT_VARIABLE ROOT_BIN_DIR
123 OUTPUT_STRIP_TRAILING_WHITESPACE)
124 if(NOT EXISTS "${ROOT_BIN_DIR}")
125 set(ROOT_FOUND FALSE)
126 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} ROOT executable directory ${ROOT_BIN_DIR} does not exist.")
130 COMMAND ${ROOT_CONFIG_EXECUTABLE} --incdir
131 OUTPUT_VARIABLE ROOT_INCLUDE_DIR
132 OUTPUT_STRIP_TRAILING_WHITESPACE)
133 if(NOT EXISTS "${ROOT_INCLUDE_DIR}")
134 set(ROOT_FOUND FALSE)
135 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} ROOT include directory ${ROOT_INCLUDE_DIR} does not exist.")
139 COMMAND ${ROOT_CONFIG_EXECUTABLE} --libdir
140 OUTPUT_VARIABLE ROOT_LIBRARY_DIR
141 OUTPUT_STRIP_TRAILING_WHITESPACE)
142 if(NOT EXISTS "${ROOT_LIBRARY_DIR}")
143 set(ROOT_FOUND FALSE)
144 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} ROOT library directory ${ROOT_LIBRARY_DIR} does not exist.")
148 COMMAND ${ROOT_CONFIG_EXECUTABLE} --noauxlibs --glibs
149 OUTPUT_VARIABLE ROOT_LIBRARIES
150 OUTPUT_STRIP_TRAILING_WHITESPACE)
153 COMMAND ${ROOT_CONFIG_EXECUTABLE} --auxlibs
154 OUTPUT_VARIABLE ROOT_AUX_LIBRARIES
155 OUTPUT_STRIP_TRAILING_WHITESPACE)
157 find_program(ROOTCINT_EXECUTABLE rootcint)
158 if(NOT ROOTCINT_EXECUTABLE)
159 set(ROOT_FOUND FALSE)
160 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} Cannot find rootcint.")
163 # parse version string
164 string(REGEX REPLACE "^([0-9]+)\\.[0-9][0-9]+\\/[0-9][0-9]+.*" "\\1"
165 ROOT_MAJOR_VERSION "${ROOT_VERSION}")
166 string(REGEX REPLACE "^[0-9]+\\.([0-9][0-9])+\\/[0-9][0-9]+.*" "\\1"
167 ROOT_MINOR_VERSION "${ROOT_VERSION}")
168 string(REGEX REPLACE "^[0-9]+\\.[0-9][0-9]+\\/([0-9][0-9]+).*" "\\1"
169 ROOT_PATCH_VERSION "${ROOT_VERSION}")
170 # make sure minor version is specified
171 if(ROOT_FIND_VERSION AND NOT ROOT_FIND_VERSION_MINOR)
172 message(FATAL_ERROR "When requesting a specific version of ROOT, you must provide at least the major and minor version numbers, e.g., 5.22")
174 # set patchlevel to 0, if not specified
175 if(NOT ROOT_FIND_VERSION_PATCH)
176 set(ROOT_FIND_VERSION_PATCH 0)
178 # compute an overall version number which can be compared at once
179 math(EXPR _ROOT_FIND_VERSION "${ROOT_FIND_VERSION_MAJOR} * 10000 + ${ROOT_FIND_VERSION_MINOR} * 100 + ${ROOT_FIND_VERSION_PATCH}")
180 math(EXPR _ROOT_VERSION "${ROOT_MAJOR_VERSION} * 10000 + ${ROOT_MINOR_VERSION} * 100 + ${ROOT_PATCH_VERSION}")
182 if(ROOT_FIND_VERSION_EXACT)
183 if(NOT _ROOT_VERSION EQUAL "${_ROOT_FIND_VERSION}")
184 set(ROOT_FOUND FALSE)
185 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} ROOT version ${ROOT_VERSION} does not match requested version ${ROOT_FIND_VERSION_MAJOR}.${ROOT_FIND_VERSION_MINOR}/${ROOT_FIND_VERSION_PATCH}.")
188 if(_ROOT_VERSION LESS "${_ROOT_FIND_VERSION}")
189 set(ROOT_FOUND FALSE)
190 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} ROOT version ${ROOT_VERSION} is lower than requested version ${ROOT_FIND_VERSION_MAJOR}.${ROOT_FIND_VERSION_MINOR}/${ROOT_FIND_VERSION_PATCH}.")
197 # generate list of ROOT libraries
200 # create list of internal libraries from root-config output
203 separate_arguments(ROOT_LIBRARIES)
204 # remove first -L entry
205 list(REMOVE_AT ROOT_LIBRARIES 0)
206 # loop over -l entries
207 foreach(_LIBRARY ${ROOT_LIBRARIES})
208 # extract library name from compiler flag and append to list
209 string(REGEX REPLACE "^-.(.*)$" "\\1" _LIBNAME "${_LIBRARY}")
210 # workaround for root-config inconsistency: if ROOT is built with --disable-builtin-zlib
211 # root-config returns the flag for the external zlib together with the internal libraries
212 if(_LIBNAME STREQUAL "z")
213 set(_EXTERNAL_ZLIB "-lz")
215 list(APPEND _LIBRARY_NAMES ${_LIBNAME})
220 list(REMOVE_DUPLICATES ROOT_FIND_COMPONENTS)
221 if(ROOT_FIND_COMPONENTS)
222 set(_LIBRARY_NAMES "${_LIBRARY_NAMES};${ROOT_FIND_COMPONENTS}")
225 # check whether libraries exist
226 foreach(_LIBNAME ${_LIBRARY_NAMES})
227 find_library(_ROOT_LIB_${_LIBNAME}
229 PATHS ${ROOT_LIBRARY_DIR}
231 if(NOT _ROOT_LIB_${_LIBNAME})
232 set(ROOT_FOUND FALSE)
233 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} Cannot find ROOT library ${_LIBNAME} in ${ROOT_LIBRARY_DIR}.")
235 list(APPEND ROOT_LIBS ${_ROOT_LIB_${_LIBNAME}})
239 # create list of external libraries from root-config output
240 separate_arguments(ROOT_AUX_LIBRARIES)
241 # append external zlib to auxiliary libraries
243 list(APPEND ROOT_AUX_LIBRARIES ${_EXTERNAL_ZLIB})
245 # loop over -l entries
246 foreach(_LIBRARY ${ROOT_AUX_LIBRARIES})
247 # extract library name from compiler flag
248 string(REGEX MATCH "^-l(.*)$" _LIBNAME "${_LIBRARY}")
250 string(REGEX REPLACE "^-.(.*)$" "\\1" _LIBNAME "${_LIBNAME}")
251 # check whether libraries exist
252 find_library(_AUX_LIB_${_LIBNAME}
254 if(NOT _AUX_LIB_${_LIBNAME})
255 set(ROOT_FOUND FALSE)
256 set(ROOT_ERROR_REASON "${ROOT_ERROR_REASON} Cannot find ROOT library ${_LIBNAME}.")
258 list(APPEND ROOT_LIBS ${_AUX_LIB_${_LIBNAME}})
266 # make variables changeable
278 message(STATUS "Found ROOT version ${ROOT_VERSION} r${ROOT_SVN_REVISION} in ${ROOTSYS}")
279 message(STATUS "Using ROOT include dir ${ROOT_INCLUDE_DIR}")
280 message(STATUS "Using ROOT library dir ${ROOT_LIBRARY_DIR}")
281 message(STATUS "Using ROOT libraries: ${ROOT_LIBRARIES}")
282 message(STATUS "Using ROOT additional components: ${ROOT_FIND_COMPONENTS}")
284 if(ROOT_FIND_REQUIRED)
285 message(FATAL_ERROR "Unable to find requested ROOT installation:${ROOT_ERROR_REASON}")
287 if(NOT ROOT_FIND_QUIETLY)
288 message(STATUS "ROOT was not found.")
294 # macro that generates ROOT dictionary
295 function(root_generate_dictionary DICT_FILE INCLUDE_DIRS HEADER_FILES LINKDEF_FILE)
298 message(FATAL_ERROR "Impossible to generate dictionary ${DICT_FILE}, because no ROOT installation was found.")
301 # prepare command line argument for compiler definitions (put -D in front)
303 get_property(_DEFS DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY COMPILE_DEFINITIONS)
304 foreach(_DEF ${_DEFS})
305 set(_DEFINITIONS "${_DEFINITIONS} -D${_DEF}")
307 separate_arguments(_DEFINITIONS)
309 # prepare command line argument for include directories (put -I in front)
311 foreach(_FILE ${INCLUDE_DIRS})
312 set(_INCLUDES ${_INCLUDES} -I${_FILE})
315 # strip paths from header file names
317 foreach(_FILE ${HEADER_FILES})
318 get_filename_component(_NAME ${_FILE} NAME)
319 set(_HEADERS ${_HEADERS} ${_NAME})
322 # add dictionary header file to output files
323 string(REGEX REPLACE "^(.*)\\.(.*)$" "\\1.h" _DICT_HEADER "${DICT_FILE}")
324 set(OUTPUT_FILES ${DICT_FILE} ${_DICT_HEADER})
326 add_custom_command(OUTPUT ${OUTPUT_FILES}
327 COMMAND ${ROOTCINT_EXECUTABLE}
328 ARGS -f ${DICT_FILE} -c -DHAVE_CONFIG_H ${_DEFINITIONS} ${_INCLUDES} ${_HEADERS} ${LINKDEF_FILE}
329 DEPENDS ${HEADER_FILES} ${LINKDEF_FILE}
332 endfunction(root_generate_dictionary)