[readobj] Fix memory leak.
[oota-llvm.git] / cmake / config-ix.cmake
1 if( WIN32 AND NOT CYGWIN )
2   # We consider Cygwin as another Unix
3   set(PURE_WINDOWS 1)
4 endif()
5
6 include(CheckIncludeFile)
7 include(CheckLibraryExists)
8 include(CheckSymbolExists)
9 include(CheckFunctionExists)
10 include(CheckCXXSymbolExists)
11 include(CheckCXXSourceCompiles)
12 include(TestBigEndian)
13
14 if( UNIX AND NOT BEOS )
15   # Used by check_symbol_exists:
16   set(CMAKE_REQUIRED_LIBRARIES m)
17 endif()
18
19 # Helper macros and functions
20 macro(add_cxx_include result files)
21   set(${result} "")
22   foreach (file_name ${files})
23      set(${result} "${${result}}#include<${file_name}>\n")
24   endforeach()
25 endmacro(add_cxx_include files result)
26
27 function(check_type_exists type files variable)
28   add_cxx_include(includes "${files}")
29   CHECK_CXX_SOURCE_COMPILES("
30     ${includes} ${type} typeVar;
31     int main() {
32         return 0;
33     }
34     " ${variable})
35 endfunction()
36
37 # include checks
38 check_include_file(argz.h HAVE_ARGZ_H)
39 check_include_file(assert.h HAVE_ASSERT_H)
40 check_include_file(ctype.h HAVE_CTYPE_H)
41 check_include_file(dirent.h HAVE_DIRENT_H)
42 check_include_file(dl.h HAVE_DL_H)
43 check_include_file(dld.h HAVE_DLD_H)
44 check_include_file(dlfcn.h HAVE_DLFCN_H)
45 check_include_file(errno.h HAVE_ERRNO_H)
46 check_include_file(execinfo.h HAVE_EXECINFO_H)
47 check_include_file(fcntl.h HAVE_FCNTL_H)
48 check_include_file(inttypes.h HAVE_INTTYPES_H)
49 check_include_file(limits.h HAVE_LIMITS_H)
50 check_include_file(link.h HAVE_LINK_H)
51 check_include_file(malloc.h HAVE_MALLOC_H)
52 check_include_file(malloc/malloc.h HAVE_MALLOC_MALLOC_H)
53 check_include_file(memory.h HAVE_MEMORY_H)
54 check_include_file(ndir.h HAVE_NDIR_H)
55 if( NOT PURE_WINDOWS )
56   check_include_file(pthread.h HAVE_PTHREAD_H)
57 endif()
58 check_include_file(sanitizer/msan_interface.h HAVE_SANITIZER_MSAN_INTERFACE_H)
59 check_include_file(setjmp.h HAVE_SETJMP_H)
60 check_include_file(signal.h HAVE_SIGNAL_H)
61 check_include_file(stdint.h HAVE_STDINT_H)
62 check_include_file(stdio.h HAVE_STDIO_H)
63 check_include_file(stdlib.h HAVE_STDLIB_H)
64 check_include_file(string.h HAVE_STRING_H)
65 check_include_file(strings.h HAVE_STRINGS_H)
66 check_include_file(sys/dir.h HAVE_SYS_DIR_H)
67 check_include_file(sys/dl.h HAVE_SYS_DL_H)
68 check_include_file(sys/ioctl.h HAVE_SYS_IOCTL_H)
69 check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
70 check_include_file(sys/ndir.h HAVE_SYS_NDIR_H)
71 check_include_file(sys/param.h HAVE_SYS_PARAM_H)
72 check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
73 check_include_file(sys/stat.h HAVE_SYS_STAT_H)
74 check_include_file(sys/time.h HAVE_SYS_TIME_H)
75 check_include_file(sys/types.h HAVE_SYS_TYPES_H)
76 check_include_file(sys/uio.h HAVE_SYS_UIO_H)
77 check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
78 check_include_file(termios.h HAVE_TERMIOS_H)
79 check_include_file(unistd.h HAVE_UNISTD_H)
80 check_include_file(utime.h HAVE_UTIME_H)
81 check_include_file(valgrind/valgrind.h HAVE_VALGRIND_VALGRIND_H)
82 check_include_file(windows.h HAVE_WINDOWS_H)
83 check_include_file(fenv.h HAVE_FENV_H)
84 check_include_file(mach/mach.h HAVE_MACH_MACH_H)
85 check_include_file(mach-o/dyld.h HAVE_MACH_O_DYLD_H)
86
87 # library checks
88 if( NOT PURE_WINDOWS )
89   check_library_exists(pthread pthread_create "" HAVE_LIBPTHREAD)
90   if (HAVE_LIBPTHREAD)
91     check_library_exists(pthread pthread_getspecific "" HAVE_PTHREAD_GETSPECIFIC)
92     check_library_exists(pthread pthread_rwlock_init "" HAVE_PTHREAD_RWLOCK_INIT)
93     check_library_exists(pthread pthread_mutex_lock "" HAVE_PTHREAD_MUTEX_LOCK)
94   else()
95     # this could be Android
96     check_library_exists(c pthread_create "" PTHREAD_IN_LIBC)
97     if (PTHREAD_IN_LIBC)
98       check_library_exists(c pthread_getspecific "" HAVE_PTHREAD_GETSPECIFIC)
99       check_library_exists(c pthread_rwlock_init "" HAVE_PTHREAD_RWLOCK_INIT)
100       check_library_exists(c pthread_mutex_lock "" HAVE_PTHREAD_MUTEX_LOCK)
101     endif()
102   endif()
103   check_library_exists(dl dlopen "" HAVE_LIBDL)
104   check_library_exists(rt clock_gettime "" HAVE_LIBRT)
105 endif()
106
107 # function checks
108 check_symbol_exists(arc4random "stdlib.h" HAVE_ARC4RANDOM)
109 check_symbol_exists(backtrace "execinfo.h" HAVE_BACKTRACE)
110 check_symbol_exists(getpagesize unistd.h HAVE_GETPAGESIZE)
111 check_symbol_exists(getrusage sys/resource.h HAVE_GETRUSAGE)
112 check_symbol_exists(setrlimit sys/resource.h HAVE_SETRLIMIT)
113 check_symbol_exists(isatty unistd.h HAVE_ISATTY)
114 check_symbol_exists(index strings.h HAVE_INDEX)
115 check_symbol_exists(isinf cmath HAVE_ISINF_IN_CMATH)
116 check_symbol_exists(isinf math.h HAVE_ISINF_IN_MATH_H)
117 check_symbol_exists(finite ieeefp.h HAVE_FINITE_IN_IEEEFP_H)
118 check_symbol_exists(isnan cmath HAVE_ISNAN_IN_CMATH)
119 check_symbol_exists(isnan math.h HAVE_ISNAN_IN_MATH_H)
120 check_symbol_exists(ceilf math.h HAVE_CEILF)
121 check_symbol_exists(floorf math.h HAVE_FLOORF)
122 check_symbol_exists(fmodf math.h HAVE_FMODF)
123 check_cxx_symbol_exists(log cmath HAVE_LOG)
124 check_cxx_symbol_exists(log2 cmath HAVE_LOG2)
125 check_cxx_symbol_exists(log10 cmath HAVE_LOG10)
126 check_cxx_symbol_exists(exp cmath HAVE_EXP)
127 check_cxx_symbol_exists(exp2 cmath HAVE_EXP2)
128 check_cxx_symbol_exists(exp10 cmath HAVE_EXP10)
129 if( HAVE_SETJMP_H )
130   check_symbol_exists(longjmp setjmp.h HAVE_LONGJMP)
131   check_symbol_exists(setjmp setjmp.h HAVE_SETJMP)
132   check_symbol_exists(siglongjmp setjmp.h HAVE_SIGLONGJMP)
133   check_symbol_exists(sigsetjmp setjmp.h HAVE_SIGSETJMP)
134 endif()
135 if( HAVE_SYS_UIO_H )
136   check_symbol_exists(writev sys/uio.h HAVE_WRITEV)
137 endif()
138 check_symbol_exists(nearbyintf math.h HAVE_NEARBYINTF)
139 check_symbol_exists(mallinfo malloc.h HAVE_MALLINFO)
140 check_symbol_exists(malloc_zone_statistics malloc/malloc.h
141                     HAVE_MALLOC_ZONE_STATISTICS)
142 check_symbol_exists(mkdtemp "stdlib.h;unistd.h" HAVE_MKDTEMP)
143 check_symbol_exists(mkstemp "stdlib.h;unistd.h" HAVE_MKSTEMP)
144 check_symbol_exists(mktemp "stdlib.h;unistd.h" HAVE_MKTEMP)
145 check_symbol_exists(closedir "sys/types.h;dirent.h" HAVE_CLOSEDIR)
146 check_symbol_exists(opendir "sys/types.h;dirent.h" HAVE_OPENDIR)
147 check_symbol_exists(readdir "sys/types.h;dirent.h" HAVE_READDIR)
148 check_symbol_exists(getcwd unistd.h HAVE_GETCWD)
149 check_symbol_exists(gettimeofday sys/time.h HAVE_GETTIMEOFDAY)
150 check_symbol_exists(getrlimit "sys/types.h;sys/time.h;sys/resource.h" HAVE_GETRLIMIT)
151 check_symbol_exists(posix_spawn spawn.h HAVE_POSIX_SPAWN)
152 check_symbol_exists(pread unistd.h HAVE_PREAD)
153 check_symbol_exists(rindex strings.h HAVE_RINDEX)
154 check_symbol_exists(strchr string.h HAVE_STRCHR)
155 check_symbol_exists(strcmp string.h HAVE_STRCMP)
156 check_symbol_exists(strdup string.h HAVE_STRDUP)
157 check_symbol_exists(strrchr string.h HAVE_STRRCHR)
158 check_symbol_exists(sbrk unistd.h HAVE_SBRK)
159 check_symbol_exists(srand48 stdlib.h HAVE_RAND48_SRAND48)
160 if( HAVE_RAND48_SRAND48 )
161   check_symbol_exists(lrand48 stdlib.h HAVE_RAND48_LRAND48)
162   if( HAVE_RAND48_LRAND48 )
163     check_symbol_exists(drand48 stdlib.h HAVE_RAND48_DRAND48)
164     if( HAVE_RAND48_DRAND48 )
165       set(HAVE_RAND48 1 CACHE INTERNAL "are srand48/lrand48/drand48 available?")
166     endif()
167   endif()
168 endif()
169 check_symbol_exists(strtoll stdlib.h HAVE_STRTOLL)
170 check_symbol_exists(strtoq stdlib.h HAVE_STRTOQ)
171 check_symbol_exists(strerror string.h HAVE_STRERROR)
172 check_symbol_exists(strerror_r string.h HAVE_STRERROR_R)
173 check_symbol_exists(strerror_s string.h HAVE_DECL_STRERROR_S)
174 check_symbol_exists(memcpy string.h HAVE_MEMCPY)
175 check_symbol_exists(memmove string.h HAVE_MEMMOVE)
176 check_symbol_exists(setenv stdlib.h HAVE_SETENV)
177 if( PURE_WINDOWS )
178   check_symbol_exists(_chsize_s io.h HAVE__CHSIZE_S)
179
180   check_function_exists(_alloca HAVE__ALLOCA)
181   check_function_exists(__alloca HAVE___ALLOCA)
182   check_function_exists(__chkstk HAVE___CHKSTK)
183   check_function_exists(___chkstk HAVE____CHKSTK)
184
185   check_function_exists(__ashldi3 HAVE___ASHLDI3)
186   check_function_exists(__ashrdi3 HAVE___ASHRDI3)
187   check_function_exists(__divdi3 HAVE___DIVDI3)
188   check_function_exists(__fixdfdi HAVE___FIXDFDI)
189   check_function_exists(__fixsfdi HAVE___FIXSFDI)
190   check_function_exists(__floatdidf HAVE___FLOATDIDF)
191   check_function_exists(__lshrdi3 HAVE___LSHRDI3)
192   check_function_exists(__moddi3 HAVE___MODDI3)
193   check_function_exists(__udivdi3 HAVE___UDIVDI3)
194   check_function_exists(__umoddi3 HAVE___UMODDI3)
195
196   check_function_exists(__main HAVE___MAIN)
197   check_function_exists(__cmpdi2 HAVE___CMPDI2)
198 endif()
199 if( HAVE_ARGZ_H )
200   check_symbol_exists(argz_append argz.h HAVE_ARGZ_APPEND)
201   check_symbol_exists(argz_create_sep argz.h HAVE_ARGZ_CREATE_SEP)
202   check_symbol_exists(argz_insert argz.h HAVE_ARGZ_INSERT)
203   check_symbol_exists(argz_next argz.h HAVE_ARGZ_NEXT)
204   check_symbol_exists(argz_stringify argz.h HAVE_ARGZ_STRINGIFY)
205 endif()
206 if( HAVE_DLFCN_H )
207   if( HAVE_LIBDL )
208     list(APPEND CMAKE_REQUIRED_LIBRARIES dl)
209   endif()
210   check_symbol_exists(dlerror dlfcn.h HAVE_DLERROR)
211   check_symbol_exists(dlopen dlfcn.h HAVE_DLOPEN)
212   if( HAVE_LIBDL )
213     list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES dl)
214   endif()
215 endif()
216
217 check_symbol_exists(__GLIBC__ stdio.h LLVM_USING_GLIBC)
218 if( LLVM_USING_GLIBC )
219   add_llvm_definitions( -D_GNU_SOURCE )
220 endif()
221
222 set(headers "")
223 if (HAVE_SYS_TYPES_H)
224   set(headers ${headers} "sys/types.h")
225 endif()
226
227 if (HAVE_INTTYPES_H)
228   set(headers ${headers} "inttypes.h")
229 endif()
230
231 if (HAVE_STDINT_H)
232   set(headers ${headers} "stdint.h")
233 endif()
234
235 check_type_exists(int64_t "${headers}" HAVE_INT64_T)
236 check_type_exists(uint64_t "${headers}" HAVE_UINT64_T)
237 check_type_exists(u_int64_t "${headers}" HAVE_U_INT64_T)
238 check_type_exists(error_t errno.h HAVE_ERROR_T)
239
240 # available programs checks
241 function(llvm_find_program name)
242   string(TOUPPER ${name} NAME)
243   string(REGEX REPLACE "\\." "_" NAME ${NAME})
244   find_program(LLVM_PATH_${NAME} ${name})
245   mark_as_advanced(LLVM_PATH_${NAME})
246   if(LLVM_PATH_${NAME})
247     set(HAVE_${NAME} 1 CACHE INTERNAL "Is ${name} available ?")
248     mark_as_advanced(HAVE_${NAME})
249   else(LLVM_PATH_${NAME})
250     set(HAVE_${NAME} "" CACHE INTERNAL "Is ${name} available ?")
251   endif(LLVM_PATH_${NAME})
252 endfunction()
253
254 llvm_find_program(gv)
255 llvm_find_program(circo)
256 llvm_find_program(twopi)
257 llvm_find_program(neato)
258 llvm_find_program(fdp)
259 llvm_find_program(dot)
260 llvm_find_program(dotty)
261 llvm_find_program(xdot.py)
262 llvm_find_program(Graphviz)
263
264 if( LLVM_ENABLE_FFI )
265   find_path(FFI_INCLUDE_PATH ffi.h PATHS ${FFI_INCLUDE_DIR})
266   if( FFI_INCLUDE_PATH )
267     set(FFI_HEADER ffi.h CACHE INTERNAL "")
268     set(HAVE_FFI_H 1 CACHE INTERNAL "")
269   else()
270     find_path(FFI_INCLUDE_PATH ffi/ffi.h PATHS ${FFI_INCLUDE_DIR})
271     if( FFI_INCLUDE_PATH )
272       set(FFI_HEADER ffi/ffi.h CACHE INTERNAL "")
273       set(HAVE_FFI_FFI_H 1 CACHE INTERNAL "")
274     endif()
275   endif()
276
277   if( NOT FFI_HEADER )
278     message(FATAL_ERROR "libffi includes are not found.")
279   endif()
280
281   find_library(FFI_LIBRARY_PATH ffi PATHS ${FFI_LIBRARY_DIR})
282   if( NOT FFI_LIBRARY_PATH )
283     message(FATAL_ERROR "libffi is not found.")
284   endif()
285
286   list(APPEND CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
287   list(APPEND CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
288   check_symbol_exists(ffi_call ${FFI_HEADER} HAVE_FFI_CALL)
289   list(REMOVE_ITEM CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
290   list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
291 else()
292   unset(HAVE_FFI_FFI_H CACHE)
293   unset(HAVE_FFI_H CACHE)
294   unset(HAVE_FFI_CALL CACHE)
295 endif( LLVM_ENABLE_FFI )
296
297 # Define LLVM_HAS_ATOMICS if gcc or MSVC atomic builtins are supported.
298 include(CheckAtomic)
299
300 if( LLVM_ENABLE_PIC )
301   set(ENABLE_PIC 1)
302 else()
303   set(ENABLE_PIC 0)
304 endif()
305
306 find_package(LibXml2)
307 if (LIBXML2_FOUND)
308   set(CLANG_HAVE_LIBXML 1)
309 endif ()
310
311 include(CheckCXXCompilerFlag)
312
313 check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG)
314
315 set(USE_NO_MAYBE_UNINITIALIZED 0)
316 set(USE_NO_UNINITIALIZED 0)
317
318 # Disable gcc's potentially uninitialized use analysis as it presents lots of
319 # false positives.
320 if (CMAKE_COMPILER_IS_GNUCXX)
321   check_cxx_compiler_flag("-Wmaybe-uninitialized" HAS_MAYBE_UNINITIALIZED)
322   if (HAS_MAYBE_UNINITIALIZED)
323     set(USE_NO_MAYBE_UNINITIALIZED 1)
324   else()
325     # Only recent versions of gcc make the distinction between -Wuninitialized
326     # and -Wmaybe-uninitialized. If -Wmaybe-uninitialized isn't supported, just
327     # turn off all uninitialized use warnings.
328     check_cxx_compiler_flag("-Wuninitialized" HAS_UNINITIALIZED)
329     set(USE_NO_UNINITIALIZED ${HAS_UNINITIALIZED})
330   endif()
331 endif()
332
333 include(GetHostTriple)
334 get_host_triple(LLVM_HOST_TRIPLE)
335
336 # By default, we target the host, but this can be overridden at CMake
337 # invocation time.
338 set(LLVM_HOSTTRIPLE "${LLVM_HOST_TRIPLE}")
339
340 # Determine the native architecture.
341 string(TOLOWER "${LLVM_TARGET_ARCH}" LLVM_NATIVE_ARCH)
342 if( LLVM_NATIVE_ARCH STREQUAL "host" )
343   string(REGEX MATCH "^[^-]*" LLVM_NATIVE_ARCH ${LLVM_HOST_TRIPLE})
344 endif ()
345
346 if (LLVM_NATIVE_ARCH MATCHES "i[2-6]86")
347   set(LLVM_NATIVE_ARCH X86)
348 elseif (LLVM_NATIVE_ARCH STREQUAL "x86")
349   set(LLVM_NATIVE_ARCH X86)
350 elseif (LLVM_NATIVE_ARCH STREQUAL "amd64")
351   set(LLVM_NATIVE_ARCH X86)
352 elseif (LLVM_NATIVE_ARCH STREQUAL "x86_64")
353   set(LLVM_NATIVE_ARCH X86)
354 elseif (LLVM_NATIVE_ARCH MATCHES "sparc")
355   set(LLVM_NATIVE_ARCH Sparc)
356 elseif (LLVM_NATIVE_ARCH MATCHES "powerpc")
357   set(LLVM_NATIVE_ARCH PowerPC)
358 elseif (LLVM_NATIVE_ARCH MATCHES "arm")
359   set(LLVM_NATIVE_ARCH ARM)
360 elseif (LLVM_NATIVE_ARCH MATCHES "mips")
361   set(LLVM_NATIVE_ARCH Mips)
362 elseif (LLVM_NATIVE_ARCH MATCHES "xcore")
363   set(LLVM_NATIVE_ARCH XCore)
364 elseif (LLVM_NATIVE_ARCH MATCHES "msp430")
365   set(LLVM_NATIVE_ARCH MSP430)
366 elseif (LLVM_NATIVE_ARCH MATCHES "hexagon")
367   set(LLVM_NATIVE_ARCH Hexagon)
368 else ()
369   message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
370 endif ()
371
372 list(FIND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH} NATIVE_ARCH_IDX)
373 if (NATIVE_ARCH_IDX EQUAL -1)
374   message(STATUS
375     "Native target ${LLVM_NATIVE_ARCH} is not selected; lli will not JIT code")
376 else ()
377   message(STATUS "Native target architecture is ${LLVM_NATIVE_ARCH}")
378   set(LLVM_NATIVE_TARGET LLVMInitialize${LLVM_NATIVE_ARCH}Target)
379   set(LLVM_NATIVE_TARGETINFO LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo)
380   set(LLVM_NATIVE_TARGETMC LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC)
381   set(LLVM_NATIVE_ASMPRINTER LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter)
382
383   # We don't have an ASM parser for all architectures yet.
384   if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/CMakeLists.txt)
385     set(LLVM_NATIVE_ASMPARSER LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser)
386   endif ()
387
388   # We don't have an disassembler for all architectures yet.
389   if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/Disassembler/CMakeLists.txt)
390     set(LLVM_NATIVE_DISASSEMBLER LLVMInitialize${LLVM_NATIVE_ARCH}Disassembler)
391   endif ()
392 endif ()
393
394 if( MINGW )
395   set(HAVE_LIBIMAGEHLP 1)
396   set(HAVE_LIBPSAPI 1)
397   # TODO: Check existence of libraries.
398   #   include(CheckLibraryExists)
399   #   CHECK_LIBRARY_EXISTS(imagehlp ??? . HAVE_LIBIMAGEHLP)
400 endif( MINGW )
401
402 if( MSVC )
403   set(error_t int)
404   set(LTDL_SHLIBPATH_VAR "PATH")
405   set(LTDL_SYSSEARCHPATH "")
406   set(LTDL_DLOPEN_DEPLIBS 1)
407   set(SHLIBEXT ".lib")
408   set(LTDL_OBJDIR "_libs")
409   set(HAVE_STRTOLL 1)
410   set(strtoll "_strtoi64")
411   set(strtoull "_strtoui64")
412   set(stricmp "_stricmp")
413   set(strdup "_strdup")
414 else( MSVC )
415   set(LTDL_SHLIBPATH_VAR "LD_LIBRARY_PATH")
416   set(LTDL_SYSSEARCHPATH "") # TODO
417   set(LTDL_DLOPEN_DEPLIBS 0)  # TODO
418 endif( MSVC )
419
420 if( PURE_WINDOWS )
421   CHECK_CXX_SOURCE_COMPILES("
422     #include <windows.h>
423     #include <imagehlp.h>
424     extern \"C\" void foo(PENUMLOADED_MODULES_CALLBACK);
425     extern \"C\" void foo(BOOL(CALLBACK*)(PCSTR,ULONG_PTR,ULONG,PVOID));
426     int main(){return 0;}"
427     HAVE_ELMCB_PCSTR)
428   if( HAVE_ELMCB_PCSTR )
429     set(WIN32_ELMCB_PCSTR "PCSTR")
430   else()
431     set(WIN32_ELMCB_PCSTR "PSTR")
432   endif()
433 endif( PURE_WINDOWS )
434
435 # FIXME: Signal handler return type, currently hardcoded to 'void'
436 set(RETSIGTYPE void)
437
438 if( LLVM_ENABLE_THREADS )
439   # Check if threading primitives aren't supported on this platform
440   if( NOT HAVE_PTHREAD_H AND NOT WIN32 )
441     set(LLVM_ENABLE_THREADS 0)
442   endif()
443 endif()
444
445 if( LLVM_ENABLE_THREADS )
446   message(STATUS "Threads enabled.")
447 else( LLVM_ENABLE_THREADS )
448   message(STATUS "Threads disabled.")
449 endif()
450
451 set(LLVM_PREFIX ${CMAKE_INSTALL_PREFIX})