1if( WIN32 AND NOT CYGWIN )
2  # We consider Cygwin as another Unix
3  set(PURE_WINDOWS 1)
4endif()
5
6include(CheckIncludeFile)
7include(CheckIncludeFileCXX)
8include(CheckLibraryExists)
9include(CheckSymbolExists)
10include(CheckFunctionExists)
11include(CheckCXXSourceCompiles)
12include(TestBigEndian)
13
14if( UNIX AND NOT BEOS )
15  # Used by check_symbol_exists:
16  set(CMAKE_REQUIRED_LIBRARIES m)
17endif()
18
19# Helper macros and functions
20macro(add_cxx_include result files)
21  set(${result} "")
22  foreach (file_name ${files})
23     set(${result} "${${result}}#include<${file_name}>\n")
24  endforeach()
25endmacro(add_cxx_include files result)
26
27function(check_type_exists type files variable)
28  add_cxx_include(includes "${files}")
29  CHECK_CXX_SOURCE_COMPILES("
30    ${includes} ${type} typeVar;
31    int main() {
32        return 0;
33    }
34    " ${variable})
35endfunction()
36
37# include checks
38check_include_file_cxx(cxxabi.h HAVE_CXXABI_H)
39check_include_file(dirent.h HAVE_DIRENT_H)
40check_include_file(dlfcn.h HAVE_DLFCN_H)
41check_include_file(errno.h HAVE_ERRNO_H)
42check_include_file(execinfo.h HAVE_EXECINFO_H)
43check_include_file(fcntl.h HAVE_FCNTL_H)
44check_include_file(inttypes.h HAVE_INTTYPES_H)
45check_include_file(limits.h HAVE_LIMITS_H)
46check_include_file(malloc.h HAVE_MALLOC_H)
47check_include_file(malloc/malloc.h HAVE_MALLOC_MALLOC_H)
48check_include_file(ndir.h HAVE_NDIR_H)
49if( NOT PURE_WINDOWS )
50  check_include_file(pthread.h HAVE_PTHREAD_H)
51endif()
52check_include_file(sanitizer/msan_interface.h HAVE_SANITIZER_MSAN_INTERFACE_H)
53check_include_file(signal.h HAVE_SIGNAL_H)
54check_include_file(stdint.h HAVE_STDINT_H)
55check_include_file(sys/dir.h HAVE_SYS_DIR_H)
56check_include_file(sys/ioctl.h HAVE_SYS_IOCTL_H)
57check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
58check_include_file(sys/ndir.h HAVE_SYS_NDIR_H)
59check_include_file(sys/param.h HAVE_SYS_PARAM_H)
60check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
61check_include_file(sys/stat.h HAVE_SYS_STAT_H)
62check_include_file(sys/time.h HAVE_SYS_TIME_H)
63check_include_file(sys/uio.h HAVE_SYS_UIO_H)
64check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
65check_include_file(termios.h HAVE_TERMIOS_H)
66check_include_file(unistd.h HAVE_UNISTD_H)
67check_include_file(utime.h HAVE_UTIME_H)
68check_include_file(valgrind/valgrind.h HAVE_VALGRIND_VALGRIND_H)
69check_include_file(zlib.h HAVE_ZLIB_H)
70check_include_file(fenv.h HAVE_FENV_H)
71check_symbol_exists(FE_ALL_EXCEPT "fenv.h" HAVE_DECL_FE_ALL_EXCEPT)
72check_symbol_exists(FE_INEXACT "fenv.h" HAVE_DECL_FE_INEXACT)
73
74check_include_file(mach/mach.h HAVE_MACH_MACH_H)
75check_include_file(mach-o/dyld.h HAVE_MACH_O_DYLD_H)
76
77# library checks
78if( NOT PURE_WINDOWS )
79  check_library_exists(pthread pthread_create "" HAVE_LIBPTHREAD)
80  if (HAVE_LIBPTHREAD)
81    check_library_exists(pthread pthread_getspecific "" HAVE_PTHREAD_GETSPECIFIC)
82    check_library_exists(pthread pthread_rwlock_init "" HAVE_PTHREAD_RWLOCK_INIT)
83    check_library_exists(pthread pthread_mutex_lock "" HAVE_PTHREAD_MUTEX_LOCK)
84  else()
85    # this could be Android
86    check_library_exists(c pthread_create "" PTHREAD_IN_LIBC)
87    if (PTHREAD_IN_LIBC)
88      check_library_exists(c pthread_getspecific "" HAVE_PTHREAD_GETSPECIFIC)
89      check_library_exists(c pthread_rwlock_init "" HAVE_PTHREAD_RWLOCK_INIT)
90      check_library_exists(c pthread_mutex_lock "" HAVE_PTHREAD_MUTEX_LOCK)
91    endif()
92  endif()
93  check_library_exists(dl dlopen "" HAVE_LIBDL)
94  check_library_exists(rt clock_gettime "" HAVE_LIBRT)
95  if (LLVM_ENABLE_ZLIB)
96    check_library_exists(z compress2 "" HAVE_LIBZ)
97  else()
98    set(HAVE_LIBZ 0)
99  endif()
100  if(LLVM_ENABLE_TERMINFO)
101    set(HAVE_TERMINFO 0)
102    foreach(library tinfo terminfo curses ncurses ncursesw)
103      string(TOUPPER ${library} library_suffix)
104      check_library_exists(${library} setupterm "" HAVE_TERMINFO_${library_suffix})
105      if(HAVE_TERMINFO_${library_suffix})
106        set(HAVE_TERMINFO 1)
107        set(TERMINFO_LIBS "${library}")
108        break()
109      endif()
110    endforeach()
111  else()
112    set(HAVE_TERMINFO 0)
113  endif()
114endif()
115
116# function checks
117check_symbol_exists(arc4random "stdlib.h" HAVE_ARC4RANDOM)
118check_symbol_exists(backtrace "execinfo.h" HAVE_BACKTRACE)
119check_symbol_exists(getpagesize unistd.h HAVE_GETPAGESIZE)
120check_symbol_exists(getrusage sys/resource.h HAVE_GETRUSAGE)
121check_symbol_exists(setrlimit sys/resource.h HAVE_SETRLIMIT)
122check_symbol_exists(isatty unistd.h HAVE_ISATTY)
123check_symbol_exists(isinf cmath HAVE_ISINF_IN_CMATH)
124check_symbol_exists(isinf math.h HAVE_ISINF_IN_MATH_H)
125check_symbol_exists(finite ieeefp.h HAVE_FINITE_IN_IEEEFP_H)
126check_symbol_exists(isnan cmath HAVE_ISNAN_IN_CMATH)
127check_symbol_exists(isnan math.h HAVE_ISNAN_IN_MATH_H)
128check_symbol_exists(ceilf math.h HAVE_CEILF)
129check_symbol_exists(floorf math.h HAVE_FLOORF)
130check_symbol_exists(fmodf math.h HAVE_FMODF)
131check_symbol_exists(log math.h HAVE_LOG)
132check_symbol_exists(log2 math.h HAVE_LOG2)
133check_symbol_exists(log10 math.h HAVE_LOG10)
134check_symbol_exists(exp math.h HAVE_EXP)
135check_symbol_exists(exp2 math.h HAVE_EXP2)
136check_symbol_exists(exp10 math.h HAVE_EXP10)
137check_symbol_exists(futimens sys/stat.h HAVE_FUTIMENS)
138check_symbol_exists(futimes sys/time.h HAVE_FUTIMES)
139if( HAVE_SETJMP_H )
140  check_symbol_exists(longjmp setjmp.h HAVE_LONGJMP)
141  check_symbol_exists(setjmp setjmp.h HAVE_SETJMP)
142  check_symbol_exists(siglongjmp setjmp.h HAVE_SIGLONGJMP)
143  check_symbol_exists(sigsetjmp setjmp.h HAVE_SIGSETJMP)
144endif()
145if( HAVE_SYS_UIO_H )
146  check_symbol_exists(writev sys/uio.h HAVE_WRITEV)
147endif()
148check_symbol_exists(nearbyintf math.h HAVE_NEARBYINTF)
149check_symbol_exists(mallinfo malloc.h HAVE_MALLINFO)
150check_symbol_exists(malloc_zone_statistics malloc/malloc.h
151                    HAVE_MALLOC_ZONE_STATISTICS)
152check_symbol_exists(mkdtemp "stdlib.h;unistd.h" HAVE_MKDTEMP)
153check_symbol_exists(mkstemp "stdlib.h;unistd.h" HAVE_MKSTEMP)
154check_symbol_exists(mktemp "stdlib.h;unistd.h" HAVE_MKTEMP)
155check_symbol_exists(closedir "sys/types.h;dirent.h" HAVE_CLOSEDIR)
156check_symbol_exists(opendir "sys/types.h;dirent.h" HAVE_OPENDIR)
157check_symbol_exists(readdir "sys/types.h;dirent.h" HAVE_READDIR)
158check_symbol_exists(getcwd unistd.h HAVE_GETCWD)
159check_symbol_exists(gettimeofday sys/time.h HAVE_GETTIMEOFDAY)
160check_symbol_exists(getrlimit "sys/types.h;sys/time.h;sys/resource.h" HAVE_GETRLIMIT)
161check_symbol_exists(posix_spawn spawn.h HAVE_POSIX_SPAWN)
162check_symbol_exists(pread unistd.h HAVE_PREAD)
163check_symbol_exists(realpath stdlib.h HAVE_REALPATH)
164check_symbol_exists(sbrk unistd.h HAVE_SBRK)
165check_symbol_exists(srand48 stdlib.h HAVE_RAND48_SRAND48)
166if( HAVE_RAND48_SRAND48 )
167  check_symbol_exists(lrand48 stdlib.h HAVE_RAND48_LRAND48)
168  if( HAVE_RAND48_LRAND48 )
169    check_symbol_exists(drand48 stdlib.h HAVE_RAND48_DRAND48)
170    if( HAVE_RAND48_DRAND48 )
171      set(HAVE_RAND48 1 CACHE INTERNAL "are srand48/lrand48/drand48 available?")
172    endif()
173  endif()
174endif()
175check_symbol_exists(strtoll stdlib.h HAVE_STRTOLL)
176check_symbol_exists(strtoq stdlib.h HAVE_STRTOQ)
177check_symbol_exists(strerror string.h HAVE_STRERROR)
178check_symbol_exists(strerror_r string.h HAVE_STRERROR_R)
179check_symbol_exists(strerror_s string.h HAVE_DECL_STRERROR_S)
180check_symbol_exists(setenv stdlib.h HAVE_SETENV)
181if( PURE_WINDOWS )
182  check_symbol_exists(_chsize_s io.h HAVE__CHSIZE_S)
183
184  check_function_exists(_alloca HAVE__ALLOCA)
185  check_function_exists(__alloca HAVE___ALLOCA)
186  check_function_exists(__chkstk HAVE___CHKSTK)
187  check_function_exists(___chkstk HAVE____CHKSTK)
188
189  check_function_exists(__ashldi3 HAVE___ASHLDI3)
190  check_function_exists(__ashrdi3 HAVE___ASHRDI3)
191  check_function_exists(__divdi3 HAVE___DIVDI3)
192  check_function_exists(__fixdfdi HAVE___FIXDFDI)
193  check_function_exists(__fixsfdi HAVE___FIXSFDI)
194  check_function_exists(__floatdidf HAVE___FLOATDIDF)
195  check_function_exists(__lshrdi3 HAVE___LSHRDI3)
196  check_function_exists(__moddi3 HAVE___MODDI3)
197  check_function_exists(__udivdi3 HAVE___UDIVDI3)
198  check_function_exists(__umoddi3 HAVE___UMODDI3)
199
200  check_function_exists(__main HAVE___MAIN)
201  check_function_exists(__cmpdi2 HAVE___CMPDI2)
202endif()
203if( HAVE_DLFCN_H )
204  if( HAVE_LIBDL )
205    list(APPEND CMAKE_REQUIRED_LIBRARIES dl)
206  endif()
207  check_symbol_exists(dlerror dlfcn.h HAVE_DLERROR)
208  check_symbol_exists(dlopen dlfcn.h HAVE_DLOPEN)
209  if( HAVE_LIBDL )
210    list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES dl)
211  endif()
212endif()
213
214check_symbol_exists(__GLIBC__ stdio.h LLVM_USING_GLIBC)
215if( LLVM_USING_GLIBC )
216  add_llvm_definitions( -D_GNU_SOURCE )
217endif()
218
219set(headers "sys/types.h")
220
221if (HAVE_INTTYPES_H)
222  set(headers ${headers} "inttypes.h")
223endif()
224
225if (HAVE_STDINT_H)
226  set(headers ${headers} "stdint.h")
227endif()
228
229check_type_exists(int64_t "${headers}" HAVE_INT64_T)
230check_type_exists(uint64_t "${headers}" HAVE_UINT64_T)
231check_type_exists(u_int64_t "${headers}" HAVE_U_INT64_T)
232
233# available programs checks
234function(llvm_find_program name)
235  string(TOUPPER ${name} NAME)
236  string(REGEX REPLACE "\\." "_" NAME ${NAME})
237
238  find_program(LLVM_PATH_${NAME} NAMES ${ARGV})
239  mark_as_advanced(LLVM_PATH_${NAME})
240  if(LLVM_PATH_${NAME})
241    set(HAVE_${NAME} 1 CACHE INTERNAL "Is ${name} available ?")
242    mark_as_advanced(HAVE_${NAME})
243  else(LLVM_PATH_${NAME})
244    set(HAVE_${NAME} "" CACHE INTERNAL "Is ${name} available ?")
245  endif(LLVM_PATH_${NAME})
246endfunction()
247
248llvm_find_program(gv)
249llvm_find_program(circo)
250llvm_find_program(twopi)
251llvm_find_program(neato)
252llvm_find_program(fdp)
253llvm_find_program(dot)
254llvm_find_program(dotty)
255llvm_find_program(xdot xdot.py)
256llvm_find_program(Graphviz)
257
258if( LLVM_ENABLE_FFI )
259  find_path(FFI_INCLUDE_PATH ffi.h PATHS ${FFI_INCLUDE_DIR})
260  if( FFI_INCLUDE_PATH )
261    set(FFI_HEADER ffi.h CACHE INTERNAL "")
262    set(HAVE_FFI_H 1 CACHE INTERNAL "")
263  else()
264    find_path(FFI_INCLUDE_PATH ffi/ffi.h PATHS ${FFI_INCLUDE_DIR})
265    if( FFI_INCLUDE_PATH )
266      set(FFI_HEADER ffi/ffi.h CACHE INTERNAL "")
267      set(HAVE_FFI_FFI_H 1 CACHE INTERNAL "")
268    endif()
269  endif()
270
271  if( NOT FFI_HEADER )
272    message(FATAL_ERROR "libffi includes are not found.")
273  endif()
274
275  find_library(FFI_LIBRARY_PATH ffi PATHS ${FFI_LIBRARY_DIR})
276  if( NOT FFI_LIBRARY_PATH )
277    message(FATAL_ERROR "libffi is not found.")
278  endif()
279
280  list(APPEND CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
281  list(APPEND CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
282  check_symbol_exists(ffi_call ${FFI_HEADER} HAVE_FFI_CALL)
283  list(REMOVE_ITEM CMAKE_REQUIRED_INCLUDES ${FFI_INCLUDE_PATH})
284  list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES ${FFI_LIBRARY_PATH})
285else()
286  unset(HAVE_FFI_FFI_H CACHE)
287  unset(HAVE_FFI_H CACHE)
288  unset(HAVE_FFI_CALL CACHE)
289endif( LLVM_ENABLE_FFI )
290
291# Define LLVM_HAS_ATOMICS if gcc or MSVC atomic builtins are supported.
292include(CheckAtomic)
293
294if( LLVM_ENABLE_PIC )
295  set(ENABLE_PIC 1)
296else()
297  set(ENABLE_PIC 0)
298endif()
299
300find_package(LibXml2)
301if (LIBXML2_FOUND)
302  set(CLANG_HAVE_LIBXML 1)
303  # When cross-compiling, liblzma is not detected as a dependency for libxml2,
304  # which makes linking c-index-test fail. But for native builds, all libraries
305  # are installed and checked by CMake before Makefiles are generated and everything
306  # works according to the plan. However, if a -llzma is added to native builds,
307  # an additional requirement on the static liblzma.a is required, but will not
308  # be checked by CMake, breaking native compilation.
309  # Since this is only pertinent to cross-compilations, and there's no way CMake
310  # can check for every foreign library on every OS, we add the dep and warn the dev.
311  if ( CMAKE_CROSSCOMPILING )
312    if (NOT PC_LIBXML_VERSION VERSION_LESS "2.8.0")
313      message(STATUS "Adding LZMA as a dep to XML2 for cross-compilation, make sure liblzma.a is available.")
314      set(LIBXML2_LIBRARIES ${LIBXML2_LIBRARIES} "-llzma")
315    endif ()
316  endif ()
317endif ()
318
319include(CheckCXXCompilerFlag)
320
321check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG)
322
323set(USE_NO_MAYBE_UNINITIALIZED 0)
324set(USE_NO_UNINITIALIZED 0)
325
326# Disable gcc's potentially uninitialized use analysis as it presents lots of
327# false positives.
328if (CMAKE_COMPILER_IS_GNUCXX)
329  check_cxx_compiler_flag("-Wmaybe-uninitialized" HAS_MAYBE_UNINITIALIZED)
330  if (HAS_MAYBE_UNINITIALIZED)
331    set(USE_NO_MAYBE_UNINITIALIZED 1)
332  else()
333    # Only recent versions of gcc make the distinction between -Wuninitialized
334    # and -Wmaybe-uninitialized. If -Wmaybe-uninitialized isn't supported, just
335    # turn off all uninitialized use warnings.
336    check_cxx_compiler_flag("-Wuninitialized" HAS_UNINITIALIZED)
337    set(USE_NO_UNINITIALIZED ${HAS_UNINITIALIZED})
338  endif()
339endif()
340
341# By default, we target the host, but this can be overridden at CMake
342# invocation time.
343include(GetHostTriple)
344get_host_triple(LLVM_INFERRED_HOST_TRIPLE)
345
346set(LLVM_HOST_TRIPLE "${LLVM_INFERRED_HOST_TRIPLE}" CACHE STRING
347    "Host on which LLVM binaries will run")
348
349# Determine the native architecture.
350string(TOLOWER "${LLVM_TARGET_ARCH}" LLVM_NATIVE_ARCH)
351if( LLVM_NATIVE_ARCH STREQUAL "host" )
352  string(REGEX MATCH "^[^-]*" LLVM_NATIVE_ARCH ${LLVM_HOST_TRIPLE})
353endif ()
354
355if (LLVM_NATIVE_ARCH MATCHES "i[2-6]86")
356  set(LLVM_NATIVE_ARCH X86)
357elseif (LLVM_NATIVE_ARCH STREQUAL "x86")
358  set(LLVM_NATIVE_ARCH X86)
359elseif (LLVM_NATIVE_ARCH STREQUAL "amd64")
360  set(LLVM_NATIVE_ARCH X86)
361elseif (LLVM_NATIVE_ARCH STREQUAL "x86_64")
362  set(LLVM_NATIVE_ARCH X86)
363elseif (LLVM_NATIVE_ARCH MATCHES "sparc")
364  set(LLVM_NATIVE_ARCH Sparc)
365elseif (LLVM_NATIVE_ARCH MATCHES "powerpc")
366  set(LLVM_NATIVE_ARCH PowerPC)
367elseif (LLVM_NATIVE_ARCH MATCHES "aarch64")
368  set(LLVM_NATIVE_ARCH AArch64)
369elseif (LLVM_NATIVE_ARCH MATCHES "arm")
370  set(LLVM_NATIVE_ARCH ARM)
371elseif (LLVM_NATIVE_ARCH MATCHES "mips")
372  set(LLVM_NATIVE_ARCH Mips)
373elseif (LLVM_NATIVE_ARCH MATCHES "xcore")
374  set(LLVM_NATIVE_ARCH XCore)
375elseif (LLVM_NATIVE_ARCH MATCHES "msp430")
376  set(LLVM_NATIVE_ARCH MSP430)
377elseif (LLVM_NATIVE_ARCH MATCHES "hexagon")
378  set(LLVM_NATIVE_ARCH Hexagon)
379elseif (LLVM_NATIVE_ARCH MATCHES "s390x")
380  set(LLVM_NATIVE_ARCH SystemZ)
381else ()
382  message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
383endif ()
384
385# If build targets includes "host", then replace with native architecture.
386list(FIND LLVM_TARGETS_TO_BUILD "host" idx)
387if( NOT idx LESS 0 )
388  list(REMOVE_AT LLVM_TARGETS_TO_BUILD ${idx})
389  list(APPEND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH})
390  list(REMOVE_DUPLICATES LLVM_TARGETS_TO_BUILD)
391endif()
392
393list(FIND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH} NATIVE_ARCH_IDX)
394if (NATIVE_ARCH_IDX EQUAL -1)
395  message(STATUS
396    "Native target ${LLVM_NATIVE_ARCH} is not selected; lli will not JIT code")
397else ()
398  message(STATUS "Native target architecture is ${LLVM_NATIVE_ARCH}")
399  set(LLVM_NATIVE_TARGET LLVMInitialize${LLVM_NATIVE_ARCH}Target)
400  set(LLVM_NATIVE_TARGETINFO LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo)
401  set(LLVM_NATIVE_TARGETMC LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC)
402  set(LLVM_NATIVE_ASMPRINTER LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter)
403
404  # We don't have an ASM parser for all architectures yet.
405  if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/CMakeLists.txt)
406    set(LLVM_NATIVE_ASMPARSER LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser)
407  endif ()
408
409  # We don't have an disassembler for all architectures yet.
410  if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/Disassembler/CMakeLists.txt)
411    set(LLVM_NATIVE_DISASSEMBLER LLVMInitialize${LLVM_NATIVE_ARCH}Disassembler)
412  endif ()
413endif ()
414
415if( MINGW )
416  set(HAVE_LIBIMAGEHLP 1)
417  set(HAVE_LIBPSAPI 1)
418  set(HAVE_LIBSHELL32 1)
419  # TODO: Check existence of libraries.
420  #   include(CheckLibraryExists)
421  #   CHECK_LIBRARY_EXISTS(imagehlp ??? . HAVE_LIBIMAGEHLP)
422endif( MINGW )
423
424if (NOT HAVE_STRTOLL)
425  # Use _strtoi64 if strtoll is not available.
426  check_symbol_exists(_strtoi64 stdlib.h have_strtoi64)
427  if (have_strtoi64)
428    set(HAVE_STRTOLL 1)
429    set(strtoll "_strtoi64")
430    set(strtoull "_strtoui64")
431  endif ()
432endif ()
433
434if( MSVC )
435  set(SHLIBEXT ".lib")
436  set(stricmp "_stricmp")
437  set(strdup "_strdup")
438endif( MSVC )
439
440if( PURE_WINDOWS )
441  CHECK_CXX_SOURCE_COMPILES("
442    #include <windows.h>
443    #include <imagehlp.h>
444    extern \"C\" void foo(PENUMLOADED_MODULES_CALLBACK);
445    extern \"C\" void foo(BOOL(CALLBACK*)(PCSTR,ULONG_PTR,ULONG,PVOID));
446    int main(){return 0;}"
447    HAVE_ELMCB_PCSTR)
448  if( HAVE_ELMCB_PCSTR )
449    set(WIN32_ELMCB_PCSTR "PCSTR")
450  else()
451    set(WIN32_ELMCB_PCSTR "PSTR")
452  endif()
453endif( PURE_WINDOWS )
454
455# FIXME: Signal handler return type, currently hardcoded to 'void'
456set(RETSIGTYPE void)
457
458if( LLVM_ENABLE_THREADS )
459  # Check if threading primitives aren't supported on this platform
460  if( NOT HAVE_PTHREAD_H AND NOT WIN32 )
461    set(LLVM_ENABLE_THREADS 0)
462  endif()
463endif()
464
465if( LLVM_ENABLE_THREADS )
466  message(STATUS "Threads enabled.")
467else( LLVM_ENABLE_THREADS )
468  message(STATUS "Threads disabled.")
469endif()
470
471if (LLVM_ENABLE_ZLIB )
472  # Check if zlib is available in the system.
473  if ( NOT HAVE_ZLIB_H OR NOT HAVE_LIBZ )
474    set(LLVM_ENABLE_ZLIB 0)
475  endif()
476endif()
477
478set(LLVM_PREFIX ${CMAKE_INSTALL_PREFIX})
479
480if (LLVM_ENABLE_DOXYGEN)
481  message(STATUS "Doxygen enabled.")
482  find_package(Doxygen)
483
484  if (DOXYGEN_FOUND)
485    # If we find doxygen and we want to enable doxygen by default create a
486    # global aggregate doxygen target for generating llvm and any/all
487    # subprojects doxygen documentation.
488    if (LLVM_BUILD_DOCS)
489      add_custom_target(doxygen ALL)
490    endif()
491
492    option(LLVM_DOXYGEN_EXTERNAL_SEARCH "Enable doxygen external search." OFF)
493    if (LLVM_DOXYGEN_EXTERNAL_SEARCH)
494      set(LLVM_DOXYGEN_SEARCHENGINE_URL "" CACHE STRING "URL to use for external searhc.")
495      set(LLVM_DOXYGEN_SEARCH_MAPPINGS "" CACHE STRING "Doxygen Search Mappings")
496    endif()
497  endif()
498else()
499  message(STATUS "Doxygen disabled.")
500endif()
501