2 # This file is part of the GROMACS molecular simulation package.
4 # Copyright (c) 2018, by the GROMACS development team, led by
5 # Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 # and including many others, as listed in the AUTHORS file in the
7 # top-level source directory and at http://www.gromacs.org.
9 # GROMACS is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU Lesser General Public License
11 # as published by the Free Software Foundation; either version 2.1
12 # of the License, or (at your option) any later version.
14 # GROMACS is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 # Lesser General Public License for more details.
19 # You should have received a copy of the GNU Lesser General Public
20 # License along with GROMACS; if not, see
21 # http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 # If you want to redistribute modifications to GROMACS, please
25 # consider that scientific software is very special. Version
26 # control is crucial - bugs must be traceable. We will be happy to
27 # consider code for inclusion in the official distribution, but
28 # derived work must not be called official GROMACS. Details are found
29 # in the README & COPYING files - if they are missing, get the
30 # official version at http://www.gromacs.org.
32 # To help us fund GROMACS development, we humbly ask that you cite
33 # the research papers on the package. Check out http://www.gromacs.org.
35 # Permit the use of ccache (when available in the system path or
36 # CMAKE_PREFIX_PATH), which wraps the CMAKE_C_COMPILER and
37 # CMAKE_CXX_COMPILER to speed up build times. Reference
38 # https://ccache.samba.org and
39 # https://crascit.com/2016/04/09/using-ccache-with-cmake/
41 option(GMX_ENABLE_CCACHE "Allow CMake to use ccache compiler wrappers if available." OFF)
43 if(NOT GMX_ENABLE_CCACHE)
48 message(FATAL_ERROR "ccache does not work with the wrapper script used for "
49 "clang-tidy builds. Use -DGMX_ENABLE_CCACHE=off.")
51 if(GMX_CLANG_ANALYZER)
52 message(FATAL_ERROR "ccache does not work with the wrapper script used for "
53 "clang-analyzer builds. Use -DGMX_ENABLE_CCACHE=off.")
56 # Here we try to make sure that ccache is invoked as `/.../ccache compiler args` to best handle more than one local
57 # compiler or a compiler wrapper, whereas it is otherwise common to replace the default compilers with symbolic links
58 # to the ccache binary.
60 # ccache only works for gcc compatible compilers. We should test with anything other than CMAKE_<LANG>_COMPILER_ID==GNU
61 # Clang is reported to work with some caveats. See https://pspdfkit.com/blog/2015/ccache-for-fun-and-profit/
62 find_program(CCACHE_PROGRAM ccache)
64 # Check whether C compiler wrapper has been set up.
65 if(NOT DEFINED GMX_CCACHE_C_COMPILER)
66 # Determine whether we have a cacheable compiler.
68 if (CMAKE_C_COMPILER_ID MATCHES "GNU"
69 OR CMAKE_C_COMPILER_ID MATCHES "AppleClang"
70 OR CMAKE_C_COMPILER_ID MATCHES "Clang")
71 message(STATUS "Setting up ccache wrapper for ${CMAKE_C_COMPILER_ID} C compiler ${CMAKE_C_COMPILER}")
72 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/admin/ccache-wrapper-c.in ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/ccache-wrapper-c)
73 file(COPY ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/ccache-wrapper-c
74 DESTINATION ${CMAKE_BINARY_DIR}
76 OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
80 message(FATAL_ERROR "Cannot set up ccache, as it is not confirmed to "
81 "work with compiler ID ${CMAKE_C_COMPILER_ID}.")
83 set(GMX_CCACHE_C_COMPILER ${_cacheable} CACHE INTERNAL "Whether the C compiler will be wrapped for caching.")
86 # Check whether we should use the wrapper. If so, set CMAKE variables.
87 if(GMX_CCACHE_C_COMPILER)
88 if(CMAKE_GENERATOR STREQUAL "Xcode")
89 # Set Xcode project attributes to route compilation and linking
91 set(CMAKE_XCODE_ATTRIBUTE_CC "${CMAKE_BINARY_DIR}/ccache-wrapper-c")
92 set(CMAKE_XCODE_ATTRIBUTE_LD "${CMAKE_BINARY_DIR}/ccache-wrapper-c")
94 # Support Unix Makefiles and Ninja
95 set(CMAKE_C_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/ccache-wrapper-c")
99 # Check whether CXX compiler wrapper has been set up
100 if(NOT DEFINED GMX_CCACHE_CXX_COMPILER)
101 # Determine whether we have a cacheable compiler.
103 if (CMAKE_CXX_COMPILER_ID MATCHES "GNU"
104 OR CMAKE_CXX_COMPILER_ID MATCHES "AppleClang"
105 OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
106 message(STATUS "Setting up ccache wrapper for ${CMAKE_CXX_COMPILER_ID} CXX compiler ${CMAKE_CXX_COMPILER}")
107 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/admin/ccache-wrapper-cxx.in ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/ccache-wrapper-cxx)
108 file(COPY ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/ccache-wrapper-cxx
109 DESTINATION ${CMAKE_BINARY_DIR}
111 OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
115 message(FATAL_ERROR "Cannot set up ccache, as it is not confirmed to "
116 "work with compiler ID ${CMAKE_CXX_COMPILER_ID}.")
118 set(GMX_CCACHE_CXX_COMPILER ${_cacheable} CACHE INTERNAL "Whether the C++ compiler will be wrapped for caching.")
121 # Check whether we should use the wrapper. If so, set CMAKE variables.
122 if(GMX_CCACHE_CXX_COMPILER)
123 if(CMAKE_GENERATOR STREQUAL "Xcode")
124 # Set Xcode project attributes to route compilation and linking
125 # through our scripts
126 set(CMAKE_XCODE_ATTRIBUTE_CXX "${CMAKE_BINARY_DIR}/ccache-wrapper-cxx")
127 set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_BINARY_DIR}/ccache-wrapper-cxx")
129 # Support Unix Makefiles and Ninja
130 set(CMAKE_CXX_COMPILER_LAUNCHER "${CMAKE_BINARY_DIR}/ccache-wrapper-cxx")
134 message(FATAL_ERROR "GMX_ENABLE_CCACHE requires that the ccache executable "
135 "can be found. Add its path to the CMAKE_PREFIX_PATH path")