2 # This file is part of the GROMACS molecular simulation package.
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33 # the research papers on the package. Check out http://www.gromacs.org.
35 # Manage the GROMACS shared library setup.
37 ########################################################################
38 # Shared/static library settings
39 ########################################################################
40 # Determine the defaults (this block has no effect if the variables have
42 if((APPLE OR CYGWIN OR ${CMAKE_SYSTEM_NAME} MATCHES "Linux|.*BSD|GNU") AND NOT GMX_BUILD_MDRUN_ONLY)
43 # Maybe Solaris should be here? Patch this if you know!
44 SET(SHARED_LIBS_DEFAULT ON)
46 # Support for shared libs on native Windows is a bit new. Its
47 # default might change later if/when we sort things out. Also,
48 # Cray should go here. What variable value can detect it?
49 SET(SHARED_LIBS_DEFAULT OFF)
51 if (NOT DEFINED BUILD_SHARED_LIBS)
52 message(STATUS "Defaulting to building static libraries")
54 SET(SHARED_LIBS_DEFAULT OFF)
56 if (GMX_PREFER_STATIC_LIBS)
57 if (NOT DEFINED BUILD_SHARED_LIBS AND SHARED_LIBS_DEFAULT)
58 message("Searching for static libraries requested, so the GROMACS libraries will also be static (BUILD_SHARED_LIBS=OFF)")
60 set(SHARED_LIBS_DEFAULT OFF)
62 set(GMX_PREFER_STATIC_LIBS_DEFAULT OFF)
63 if (WIN32 AND NOT BUILD_SHARED_LIBS)
64 set(GMX_PREFER_STATIC_LIBS_DEFAULT ON)
66 if (NOT GMX_BUILD_SHARED_EXE)
67 set(GMX_PREFER_STATIC_LIBS_DEFAULT ON)
68 set(SHARED_LIBS_DEFAULT OFF)
71 # Declare the user-visible options
72 option(BUILD_SHARED_LIBS "Enable shared libraries (can be problematic e.g. with MPI, or on some HPC systems)" ${SHARED_LIBS_DEFAULT})
73 if(BUILD_SHARED_LIBS AND GMX_BUILD_MDRUN_ONLY)
74 message(WARNING "Both BUILD_SHARED_LIBS and GMX_BUILD_MDRUN_ONLY are set. Generally, an mdrun-only build should prefer to use static libraries, which is the default if you make a fresh build tree. You may be re-using an old build tree, and so may wish to set BUILD_SHARED_LIBS=off yourself.")
78 set(GMX_PREFER_STATIC_LIBS_DESCRIPTION
79 "When finding libraries prefer static archives (it will only work if static versions of external dependencies are available and found)")
81 set(GMX_PREFER_STATIC_LIBS_DESCRIPTION
82 "When finding libraries prefer static system libraries (MT instead of MD)")
84 option(GMX_PREFER_STATIC_LIBS "${GMX_PREFER_STATIC_LIBS_DESCRIPTION}"
85 ${GMX_PREFER_STATIC_LIBS_DEFAULT})
86 mark_as_advanced(GMX_PREFER_STATIC_LIBS)
88 # Act on the set values
89 if (UNIX AND GMX_PREFER_STATIC_LIBS)
91 # Warn the user about the combination. But don't overwrite the request.
92 message(WARNING "Searching for static libraries requested, and building shared GROMACS libraries requested. This might cause problems linking later.")
94 # On Linux .a is the static library suffix, on Mac OS X .lib can also
95 # be used, so we'll add both to the preference list.
96 SET(CMAKE_FIND_LIBRARY_SUFFIXES ".lib;.a" ${CMAKE_FIND_LIBRARY_SUFFIXES})
100 # Only things for managing shared libraries and build types on Windows follow
102 # Change the real CMake variables so we prefer static linking. This
103 # should be a function so we can have proper local variables while
104 # avoiding duplicating code.
105 function(gmx_manage_prefer_static_libs_flags build_type)
106 if("${build_type}" STREQUAL "")
107 set(punctuation "") # for general compiler flags (e.g.) CMAKE_CXX_FLAGS
109 set(punctuation "_") # for build-type-specific compiler flags (e.g.) CMAKE_CXX_FLAGS_RELEASE
112 # Change the real CMake variables for the given build type in each
113 # language, in the parent scope.
114 foreach(language C CXX)
115 string(REPLACE /MD /MT CMAKE_${language}_FLAGS${punctuation}${build_type} ${CMAKE_${language}_FLAGS${punctuation}${build_type}} PARENT_SCOPE)
120 if (NOT BUILD_SHARED_LIBS)
121 if(NOT GMX_PREFER_STATIC_LIBS)
122 message(WARNING "Shared system libraries requested, and static GROMACS libraries requested.")
126 set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--export-all-symbols ${CMAKE_SHARED_LINKER_FLAGS}")
128 message(FATAL_ERROR "BUILD_SHARED_LIBS=ON not yet working for Windows in the master branch")
130 if(GMX_PREFER_STATIC_LIBS)
131 #this combination segfaults (illegal passing of file handles)
132 message(FATAL_ERROR "Static system libraries requested, and shared GROMACS libraries requested.")
134 # Visibility not yet implemented
135 # add_definitions(-DUSE_VISIBILITY -DTMPI_USE_VISIBILITY)
136 # set(PKG_CFLAGS "$PKG_CFLAGS -DUSE_VISIBILITY -DTMPI_USE_VISIBILITY")
139 IF (GMX_PREFER_STATIC_LIBS)
140 foreach(build_type "" ${build_types_with_explicit_flags})
141 gmx_manage_prefer_static_libs_flags("${build_type}")
144 IF( CMAKE_C_COMPILER_ID MATCHES "Intel" )
145 if(BUILD_SHARED_LIBS) #not sure why incremental building with shared libs doesn't work
146 STRING(REPLACE "/INCREMENTAL:YES" "" CMAKE_SHARED_LINKER_FLAGS ${CMAKE_SHARED_LINKER_FLAGS})