Skip to content
Normal view Permalink
android.toolchain.cmake 80.1 KiB
Newer Older
Daniel Agar's avatar
initial optional cmake support (#6862)
Daniel Agar committed
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 
  endif()
  if( ANDROID_NDK_RELEASE_NUM LESS 7000 ) # before r7
   set( ANDROID_RTTI            OFF )
  else()
   set( ANDROID_RTTI            ON )
  endif()
  set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_NDK}/sources/cxx-stl/stlport/stlport" )
  set( __libstl                 "${ANDROID_NDK}/sources/cxx-stl/stlport/libs/${ANDROID_NDK_ABI_NAME}/libstlport_static.a" )
 elseif( ANDROID_STL MATCHES "gnustl" )
  set( ANDROID_EXCEPTIONS       ON )
  set( ANDROID_RTTI             ON )
  if( EXISTS "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}" )
   if( ARMEABI_V7A AND ANDROID_COMPILER_VERSION VERSION_EQUAL "4.7" AND ANDROID_NDK_RELEASE STREQUAL "r8d" )
    # gnustl binary for 4.7 compiler is buggy :(
    # TODO: look for right fix
    set( __libstl                "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/4.6" )
   else()
    set( __libstl                "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}" )
   endif()
  else()
   set( __libstl                "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++" )
  endif()
  set( ANDROID_STL_INCLUDE_DIRS "${__libstl}/include" "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/include" "${__libstl}/include/backward" )
  if( EXISTS "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libgnustl_static.a" )
   set( __libstl                "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libgnustl_static.a" )
  else()
   set( __libstl                "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
  endif()
 else()
  message( FATAL_ERROR "Unknown runtime: ${ANDROID_STL}" )
 endif()
 # find libsupc++.a - rtti & exceptions
 if( ANDROID_STL STREQUAL "system_re" OR ANDROID_STL MATCHES "gnustl" )
  set( __libsupcxx "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" ) # r8b or newer
  if( NOT EXISTS "${__libsupcxx}" )
   set( __libsupcxx "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" ) # r7-r8
  endif()
  if( NOT EXISTS "${__libsupcxx}" ) # before r7
   if( ARMEABI_V7A )
    if( ANDROID_FORCE_ARM_BUILD )
     set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libsupc++.a" )
    else()
     set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" )
    endif()
   elseif( ARMEABI AND NOT ANDROID_FORCE_ARM_BUILD )
    set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libsupc++.a" )
   else()
    set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" )
   endif()
  endif()
  if( NOT EXISTS "${__libsupcxx}")
   message( ERROR "Could not find libsupc++.a for a chosen platform. Either your NDK is not supported or is broken.")
  endif()
 endif()
endif()


# case of shared STL linkage
if( ANDROID_STL MATCHES "shared" AND DEFINED __libstl )
 string( REPLACE "_static.a" "_shared.so" __libstl "${__libstl}" )
 # TODO: check if .so file exists before the renaming
endif()


# ccache support
__INIT_VARIABLE( _ndk_ccache NDK_CCACHE ENV_NDK_CCACHE )
if( _ndk_ccache )
 if( DEFINED NDK_CCACHE AND NOT EXISTS NDK_CCACHE )
  unset( NDK_CCACHE CACHE )
 endif()
 find_program( NDK_CCACHE "${_ndk_ccache}" DOC "The path to ccache binary")
else()
 unset( NDK_CCACHE CACHE )
endif()
unset( _ndk_ccache )


# setup the cross-compiler
if( NOT CMAKE_C_COMPILER )
 if( NDK_CCACHE AND NOT ANDROID_SYSROOT MATCHES "[ ;\"]" )
  set( CMAKE_C_COMPILER   "${NDK_CCACHE}" CACHE PATH "ccache as C compiler" )
  set( CMAKE_CXX_COMPILER "${NDK_CCACHE}" CACHE PATH "ccache as C++ compiler" )
  if( ANDROID_COMPILER_IS_CLANG )
   set( CMAKE_C_COMPILER_ARG1   "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}${TOOL_OS_SUFFIX}"   CACHE PATH "C compiler")
   set( CMAKE_CXX_COMPILER_ARG1 "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler")
  else()
   set( CMAKE_C_COMPILER_ARG1   "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}" CACHE PATH "C compiler")
   set( CMAKE_CXX_COMPILER_ARG1 "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-g++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler")
  endif()
 else()
  if( ANDROID_COMPILER_IS_CLANG )
   set( CMAKE_C_COMPILER   "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}${TOOL_OS_SUFFIX}"   CACHE PATH "C compiler")
   set( CMAKE_CXX_COMPILER "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler")
  else()
   set( CMAKE_C_COMPILER   "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}"    CACHE PATH "C compiler" )
   set( CMAKE_CXX_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-g++${TOOL_OS_SUFFIX}"    CACHE PATH "C++ compiler" )
  endif()
 endif()
 set( CMAKE_ASM_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}"     CACHE PATH "assembler" )
 set( CMAKE_STRIP        "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-strip${TOOL_OS_SUFFIX}"   CACHE PATH "strip" )
 set( CMAKE_AR           "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ar${TOOL_OS_SUFFIX}"      CACHE PATH "archive" )
 set( CMAKE_LINKER       "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ld${TOOL_OS_SUFFIX}"      CACHE PATH "linker" )
 set( CMAKE_NM           "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-nm${TOOL_OS_SUFFIX}"      CACHE PATH "nm" )
 set( CMAKE_OBJCOPY      "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objcopy${TOOL_OS_SUFFIX}" CACHE PATH "objcopy" )
 set( CMAKE_OBJDUMP      "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objdump${TOOL_OS_SUFFIX}" CACHE PATH "objdump" )
 set( CMAKE_RANLIB       "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ranlib${TOOL_OS_SUFFIX}"  CACHE PATH "ranlib" )
endif()

set( _CMAKE_TOOLCHAIN_PREFIX "${ANDROID_TOOLCHAIN_MACHINE_NAME}-" )
if( CMAKE_VERSION VERSION_LESS 2.8.5 )
 set( CMAKE_ASM_COMPILER_ARG1 "-c" )
endif()
if( APPLE )
 find_program( CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool )
 if( NOT CMAKE_INSTALL_NAME_TOOL )
  message( FATAL_ERROR "Could not find install_name_tool, please check your installation." )
 endif()
 mark_as_advanced( CMAKE_INSTALL_NAME_TOOL )
endif()

# Force set compilers because standard identification works badly for us
include( CMakeForceCompiler )
CMAKE_FORCE_C_COMPILER( "${CMAKE_C_COMPILER}" GNU )
if( ANDROID_COMPILER_IS_CLANG )
 set( CMAKE_C_COMPILER_ID Clang )
endif()
set( CMAKE_C_PLATFORM_ID Linux )
if( X86_64 OR MIPS64 OR ARM64_V8A )
 set( CMAKE_C_SIZEOF_DATA_PTR 8 )
else()
 set( CMAKE_C_SIZEOF_DATA_PTR 4 )
endif()
set( CMAKE_C_HAS_ISYSROOT 1 )
set( CMAKE_C_COMPILER_ABI ELF )
CMAKE_FORCE_CXX_COMPILER( "${CMAKE_CXX_COMPILER}" GNU )
if( ANDROID_COMPILER_IS_CLANG )
 set( CMAKE_CXX_COMPILER_ID Clang)
endif()
set( CMAKE_CXX_PLATFORM_ID Linux )
set( CMAKE_CXX_SIZEOF_DATA_PTR ${CMAKE_C_SIZEOF_DATA_PTR} )
set( CMAKE_CXX_HAS_ISYSROOT 1 )
set( CMAKE_CXX_COMPILER_ABI ELF )
set( CMAKE_CXX_SOURCE_FILE_EXTENSIONS cc cp cxx cpp CPP c++ C )
# force ASM compiler (required for CMake < 2.8.5)
set( CMAKE_ASM_COMPILER_ID_RUN TRUE )
set( CMAKE_ASM_COMPILER_ID GNU )
set( CMAKE_ASM_COMPILER_WORKS TRUE )
set( CMAKE_ASM_COMPILER_FORCED TRUE )
set( CMAKE_COMPILER_IS_GNUASM 1)
set( CMAKE_ASM_SOURCE_FILE_EXTENSIONS s S asm )

foreach( lang C CXX ASM )
 if( ANDROID_COMPILER_IS_CLANG )
  set( CMAKE_${lang}_COMPILER_VERSION ${ANDROID_CLANG_VERSION} )
 else()
  set( CMAKE_${lang}_COMPILER_VERSION ${ANDROID_COMPILER_VERSION} )
 endif()
endforeach()

# flags and definitions
remove_definitions( -DANDROID )
add_definitions( -DANDROID )

if( ANDROID_SYSROOT MATCHES "[ ;\"]" )
 if( CMAKE_HOST_WIN32 )
  # try to convert path to 8.3 form
  file( WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cvt83.cmd" "@echo %~s1" )
  execute_process( COMMAND "$ENV{ComSpec}" /c "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cvt83.cmd" "${ANDROID_SYSROOT}"
                   OUTPUT_VARIABLE __path OUTPUT_STRIP_TRAILING_WHITESPACE
                   RESULT_VARIABLE __result ERROR_QUIET )
  if( __result EQUAL 0 )
   file( TO_CMAKE_PATH "${__path}" ANDROID_SYSROOT )
   set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
  else()
   set( ANDROID_CXX_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
  endif()
 else()
  set( ANDROID_CXX_FLAGS "'--sysroot=${ANDROID_SYSROOT}'" )
 endif()
 if( NOT _CMAKE_IN_TRY_COMPILE )
  # quotes can break try_compile and compiler identification
  message(WARNING "Path to your Android NDK (or toolchain) has non-alphanumeric symbols.\nThe build might be broken.\n")
 endif()
else()
 set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
endif()

# NDK flags
if (ARM64_V8A )
 set( ANDROID_CXX_FLAGS         "${ANDROID_CXX_FLAGS} -funwind-tables" )
 set( ANDROID_CXX_FLAGS_RELEASE "-fomit-frame-pointer -fstrict-aliasing" )
 set( ANDROID_CXX_FLAGS_DEBUG   "-fno-omit-frame-pointer -fno-strict-aliasing" )
 if( NOT ANDROID_COMPILER_IS_CLANG )
  set( ANDROID_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE} -funswitch-loops -finline-limit=300" )
 endif()
elseif( ARMEABI OR ARMEABI_V7A)
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funwind-tables" )
 if( NOT ANDROID_FORCE_ARM_BUILD AND NOT ARMEABI_V6 )
  set( ANDROID_CXX_FLAGS_RELEASE "-mthumb -fomit-frame-pointer -fno-strict-aliasing" )
  set( ANDROID_CXX_FLAGS_DEBUG   "-marm -fno-omit-frame-pointer -fno-strict-aliasing" )
  if( NOT ANDROID_COMPILER_IS_CLANG )
   set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -finline-limit=64" )
  endif()
 else()
  # always compile ARMEABI_V6 in arm mode; otherwise there is no difference from ARMEABI
  set( ANDROID_CXX_FLAGS_RELEASE "-marm -fomit-frame-pointer -fstrict-aliasing" )
  set( ANDROID_CXX_FLAGS_DEBUG   "-marm -fno-omit-frame-pointer -fno-strict-aliasing" )
  if( NOT ANDROID_COMPILER_IS_CLANG )
   set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funswitch-loops -finline-limit=300" )
  endif()
 endif()
elseif( X86 OR X86_64 )
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funwind-tables" )
 if( NOT ANDROID_COMPILER_IS_CLANG )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funswitch-loops -finline-limit=300" )
 endif()
 set( ANDROID_CXX_FLAGS_RELEASE "-fomit-frame-pointer -fstrict-aliasing" )
 set( ANDROID_CXX_FLAGS_DEBUG   "-fno-omit-frame-pointer -fno-strict-aliasing" )
elseif( MIPS OR MIPS64 )
 set( ANDROID_CXX_FLAGS         "${ANDROID_CXX_FLAGS} -fno-strict-aliasing -finline-functions -funwind-tables -fmessage-length=0" )
 set( ANDROID_CXX_FLAGS_RELEASE "-fomit-frame-pointer" )
 set( ANDROID_CXX_FLAGS_DEBUG   "-fno-omit-frame-pointer" )
 if( NOT ANDROID_COMPILER_IS_CLANG )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fno-inline-functions-called-once -fgcse-after-reload -frerun-cse-after-loop -frename-registers" )
  set( ANDROID_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE} -funswitch-loops -finline-limit=300" )
 endif()
elseif()
 set( ANDROID_CXX_FLAGS_RELEASE "" )
 set( ANDROID_CXX_FLAGS_DEBUG   "" )
endif()

set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fsigned-char" ) # good/necessary when porting desktop libraries

if( NOT X86 AND NOT ANDROID_COMPILER_IS_CLANG )
 set( ANDROID_CXX_FLAGS "-Wno-psabi ${ANDROID_CXX_FLAGS}" )
endif()

if( NOT ANDROID_COMPILER_VERSION VERSION_LESS "4.6" )
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -no-canonical-prefixes" ) # see https://android-review.googlesource.com/#/c/47564/
endif()

# ABI-specific flags
if( ARMEABI_V7A )
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
 if( NEON )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=neon" )
 elseif( VFPV3 )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3" )
 else()
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3-d16" )
 endif()
elseif( ARMEABI_V6 )
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv6 -mfloat-abi=softfp -mfpu=vfp" ) # vfp == vfpv2
elseif( ARMEABI )
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv5te -mtune=xscale -msoft-float" )
endif()

if( ANDROID_STL MATCHES "gnustl" AND (EXISTS "${__libstl}" OR EXISTS "${__libsupcxx}") )
 set( CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
 set( CMAKE_CXX_CREATE_SHARED_MODULE  "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
 set( CMAKE_CXX_LINK_EXECUTABLE       "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" )
else()
 set( CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
 set( CMAKE_CXX_CREATE_SHARED_MODULE  "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
 set( CMAKE_CXX_LINK_EXECUTABLE       "<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" )
endif()

# STL
if( EXISTS "${__libstl}" OR EXISTS "${__libsupcxx}" )
 if( EXISTS "${__libstl}" )
  set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} \"${__libstl}\"" )
  set( CMAKE_CXX_CREATE_SHARED_MODULE  "${CMAKE_CXX_CREATE_SHARED_MODULE} \"${__libstl}\"" )
  set( CMAKE_CXX_LINK_EXECUTABLE       "${CMAKE_CXX_LINK_EXECUTABLE} \"${__libstl}\"" )
 endif()
 if( EXISTS "${__libsupcxx}" )
  set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} \"${__libsupcxx}\"" )
  set( CMAKE_CXX_CREATE_SHARED_MODULE  "${CMAKE_CXX_CREATE_SHARED_MODULE} \"${__libsupcxx}\"" )
  set( CMAKE_CXX_LINK_EXECUTABLE       "${CMAKE_CXX_LINK_EXECUTABLE} \"${__libsupcxx}\"" )
  # C objects:
  set( CMAKE_C_CREATE_SHARED_LIBRARY "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
  set( CMAKE_C_CREATE_SHARED_MODULE  "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
  set( CMAKE_C_LINK_EXECUTABLE       "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" )
  set( CMAKE_C_CREATE_SHARED_LIBRARY "${CMAKE_C_CREATE_SHARED_LIBRARY} \"${__libsupcxx}\"" )
  set( CMAKE_C_CREATE_SHARED_MODULE  "${CMAKE_C_CREATE_SHARED_MODULE} \"${__libsupcxx}\"" )
  set( CMAKE_C_LINK_EXECUTABLE       "${CMAKE_C_LINK_EXECUTABLE} \"${__libsupcxx}\"" )
 endif()
 if( ANDROID_STL MATCHES "gnustl" )
  if( NOT EXISTS "${ANDROID_LIBM_PATH}" )
   set( ANDROID_LIBM_PATH -lm )
  endif()
  set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} ${ANDROID_LIBM_PATH}" )
  set( CMAKE_CXX_CREATE_SHARED_MODULE  "${CMAKE_CXX_CREATE_SHARED_MODULE} ${ANDROID_LIBM_PATH}" )
  set( CMAKE_CXX_LINK_EXECUTABLE       "${CMAKE_CXX_LINK_EXECUTABLE} ${ANDROID_LIBM_PATH}" )
 endif()
endif()

# variables controlling optional build flags
if( ANDROID_NDK_RELEASE_NUM LESS 7000 ) # before r7
 # libGLESv2.so in NDK's prior to r7 refers to missing external symbols.
 # So this flag option is required for all projects using OpenGL from native.
 __INIT_VARIABLE( ANDROID_SO_UNDEFINED                      VALUES ON )
else()
 __INIT_VARIABLE( ANDROID_SO_UNDEFINED                      VALUES OFF )
endif()
__INIT_VARIABLE( ANDROID_NO_UNDEFINED                       VALUES ON )
__INIT_VARIABLE( ANDROID_FUNCTION_LEVEL_LINKING             VALUES ON )
__INIT_VARIABLE( ANDROID_GOLD_LINKER                        VALUES ON )
__INIT_VARIABLE( ANDROID_NOEXECSTACK                        VALUES ON )
__INIT_VARIABLE( ANDROID_RELRO                              VALUES ON )

set( ANDROID_NO_UNDEFINED           ${ANDROID_NO_UNDEFINED}           CACHE BOOL "Show all undefined symbols as linker errors" )
set( ANDROID_SO_UNDEFINED           ${ANDROID_SO_UNDEFINED}           CACHE BOOL "Allows or disallows undefined symbols in shared libraries" )
set( ANDROID_FUNCTION_LEVEL_LINKING ${ANDROID_FUNCTION_LEVEL_LINKING} CACHE BOOL "Put each function in separate section and enable garbage collection of unused input sections at link time" )
set( ANDROID_GOLD_LINKER            ${ANDROID_GOLD_LINKER}            CACHE BOOL "Enables gold linker" )
set( ANDROID_NOEXECSTACK            ${ANDROID_NOEXECSTACK}            CACHE BOOL "Allows or disallows undefined symbols in shared libraries" )
set( ANDROID_RELRO                  ${ANDROID_RELRO}                  CACHE BOOL "Enables RELRO - a memory corruption mitigation technique" )
mark_as_advanced( ANDROID_NO_UNDEFINED ANDROID_SO_UNDEFINED ANDROID_FUNCTION_LEVEL_LINKING ANDROID_GOLD_LINKER ANDROID_NOEXECSTACK ANDROID_RELRO )

# linker flags
set( ANDROID_LINKER_FLAGS "" )

if( ARMEABI_V7A )
 # this is *required* to use the following linker flags that routes around
 # a CPU bug in some Cortex-A8 implementations:
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--fix-cortex-a8" )
endif()

if( ANDROID_NO_UNDEFINED )
 if( MIPS )
  # there is some sysroot-related problem in mips linker...
  if( NOT ANDROID_SYSROOT MATCHES "[ ;\"]" )
   set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--no-undefined -Wl,-rpath-link,${ANDROID_SYSROOT}/usr/lib" )
  endif()
 else()
  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--no-undefined" )
 endif()
endif()

if( ANDROID_SO_UNDEFINED )
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-allow-shlib-undefined" )
endif()

if( ANDROID_FUNCTION_LEVEL_LINKING )
 set( ANDROID_CXX_FLAGS    "${ANDROID_CXX_FLAGS} -fdata-sections -ffunction-sections" )
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--gc-sections" )
endif()

if( ANDROID_COMPILER_VERSION VERSION_EQUAL "4.6" )
 if( ANDROID_GOLD_LINKER AND (CMAKE_HOST_UNIX OR ANDROID_NDK_RELEASE_NUM GREATER 8002) AND (ARMEABI OR ARMEABI_V7A OR X86) )
  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -fuse-ld=gold" )
 elseif( ANDROID_NDK_RELEASE_NUM GREATER 8002 ) # after r8b
  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -fuse-ld=bfd" )
 elseif( ANDROID_NDK_RELEASE STREQUAL "r8b" AND ARMEABI AND NOT _CMAKE_IN_TRY_COMPILE )
  message( WARNING "The default bfd linker from arm GCC 4.6 toolchain can fail with 'unresolvable R_ARM_THM_CALL relocation' error message. See https://code.google.com/p/android/issues/detail?id=35342
  On Linux and OS X host platform you can workaround this problem using gold linker (default).
  Rerun cmake with -DANDROID_GOLD_LINKER=ON option in case of problems.
" )
 endif()
endif() # version 4.6

if( ANDROID_NOEXECSTACK )
 if( ANDROID_COMPILER_IS_CLANG )
  set( ANDROID_CXX_FLAGS    "${ANDROID_CXX_FLAGS} -Xclang -mnoexecstack" )
 else()
  set( ANDROID_CXX_FLAGS    "${ANDROID_CXX_FLAGS} -Wa,--noexecstack" )
 endif()
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-z,noexecstack" )
endif()

if( ANDROID_RELRO )
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-z,relro -Wl,-z,now" )
endif()

if( ANDROID_COMPILER_IS_CLANG )
 set( ANDROID_CXX_FLAGS "-target ${ANDROID_LLVM_TRIPLE} -Qunused-arguments ${ANDROID_CXX_FLAGS}" )
 if( BUILD_WITH_ANDROID_NDK )
  set( ANDROID_CXX_FLAGS "-gcc-toolchain ${ANDROID_TOOLCHAIN_ROOT} ${ANDROID_CXX_FLAGS}" )
 endif()
endif()

# cache flags
set( CMAKE_CXX_FLAGS           ""                        CACHE STRING "c++ flags" )
set( CMAKE_C_FLAGS             ""                        CACHE STRING "c flags" )
set( CMAKE_CXX_FLAGS_RELEASE   "-O3 -DNDEBUG"            CACHE STRING "c++ Release flags" )
set( CMAKE_C_FLAGS_RELEASE     "-O3 -DNDEBUG"            CACHE STRING "c Release flags" )
set( CMAKE_CXX_FLAGS_DEBUG     "-O0 -g -DDEBUG -D_DEBUG" CACHE STRING "c++ Debug flags" )
set( CMAKE_C_FLAGS_DEBUG       "-O0 -g -DDEBUG -D_DEBUG" CACHE STRING "c Debug flags" )
set( CMAKE_SHARED_LINKER_FLAGS ""                        CACHE STRING "shared linker flags" )
set( CMAKE_MODULE_LINKER_FLAGS ""                        CACHE STRING "module linker flags" )
set( CMAKE_EXE_LINKER_FLAGS    "-Wl,-z,nocopyreloc"      CACHE STRING "executable linker flags" )

# put flags to cache (for debug purpose only)
set( ANDROID_CXX_FLAGS         "${ANDROID_CXX_FLAGS}"         CACHE INTERNAL "Android specific c/c++ flags" )
set( ANDROID_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE}" CACHE INTERNAL "Android specific c/c++ Release flags" )
set( ANDROID_CXX_FLAGS_DEBUG   "${ANDROID_CXX_FLAGS_DEBUG}"   CACHE INTERNAL "Android specific c/c++ Debug flags" )
set( ANDROID_LINKER_FLAGS      "${ANDROID_LINKER_FLAGS}"      CACHE INTERNAL "Android specific c/c++ linker flags" )

# finish flags
set( CMAKE_CXX_FLAGS           "${ANDROID_CXX_FLAGS} ${CMAKE_CXX_FLAGS}" )
set( CMAKE_C_FLAGS             "${ANDROID_CXX_FLAGS} ${CMAKE_C_FLAGS}" )
set( CMAKE_CXX_FLAGS_RELEASE   "${ANDROID_CXX_FLAGS_RELEASE} ${CMAKE_CXX_FLAGS_RELEASE}" )
set( CMAKE_C_FLAGS_RELEASE     "${ANDROID_CXX_FLAGS_RELEASE} ${CMAKE_C_FLAGS_RELEASE}" )
set( CMAKE_CXX_FLAGS_DEBUG     "${ANDROID_CXX_FLAGS_DEBUG} ${CMAKE_CXX_FLAGS_DEBUG}" )
set( CMAKE_C_FLAGS_DEBUG       "${ANDROID_CXX_FLAGS_DEBUG} ${CMAKE_C_FLAGS_DEBUG}" )
set( CMAKE_SHARED_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}" )
set( CMAKE_MODULE_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}" )
set( CMAKE_EXE_LINKER_FLAGS    "${ANDROID_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}" )

if( MIPS AND BUILD_WITH_ANDROID_NDK AND ANDROID_NDK_RELEASE STREQUAL "r8" )
 set( CMAKE_SHARED_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.xsc ${CMAKE_SHARED_LINKER_FLAGS}" )
 set( CMAKE_MODULE_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.xsc ${CMAKE_MODULE_LINKER_FLAGS}" )
 set( CMAKE_EXE_LINKER_FLAGS    "-Wl,-T,${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.x ${CMAKE_EXE_LINKER_FLAGS}" )
endif()

# pie/pic
if( NOT (ANDROID_NATIVE_API_LEVEL LESS 16) AND (NOT DEFINED ANDROID_APP_PIE OR ANDROID_APP_PIE) AND (CMAKE_VERSION VERSION_GREATER 2.8.8) )
 set( CMAKE_POSITION_INDEPENDENT_CODE TRUE )
 set( CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fPIE -pie")
else()
 set( CMAKE_POSITION_INDEPENDENT_CODE FALSE )
 set( CMAKE_CXX_FLAGS "-fpic ${CMAKE_CXX_FLAGS}" )
 set( CMAKE_C_FLAGS   "-fpic ${CMAKE_C_FLAGS}" )
endif()

# configure rtti
if( DEFINED ANDROID_RTTI AND ANDROID_STL_FORCE_FEATURES )
 if( ANDROID_RTTI )
  set( CMAKE_CXX_FLAGS "-frtti ${CMAKE_CXX_FLAGS}" )
 else()
  set( CMAKE_CXX_FLAGS "-fno-rtti ${CMAKE_CXX_FLAGS}" )
 endif()
endif()

# configure exceptios
if( DEFINED ANDROID_EXCEPTIONS AND ANDROID_STL_FORCE_FEATURES )
 if( ANDROID_EXCEPTIONS )
  set( CMAKE_CXX_FLAGS "-fexceptions ${CMAKE_CXX_FLAGS}" )
  set( CMAKE_C_FLAGS "-fexceptions ${CMAKE_C_FLAGS}" )
 else()
  set( CMAKE_CXX_FLAGS "-fno-exceptions ${CMAKE_CXX_FLAGS}" )
  set( CMAKE_C_FLAGS "-fno-exceptions ${CMAKE_C_FLAGS}" )
 endif()
endif()

# global includes and link directories
include_directories( SYSTEM "${ANDROID_SYSROOT}/usr/include" ${ANDROID_STL_INCLUDE_DIRS} )
get_filename_component(__android_install_path "${CMAKE_INSTALL_PREFIX}/libs/${ANDROID_NDK_ABI_NAME}" ABSOLUTE) # avoid CMP0015 policy warning
link_directories( "${__android_install_path}" )

# detect if need link crtbegin_so.o explicitly
if( NOT DEFINED ANDROID_EXPLICIT_CRT_LINK )
 set( __cmd "${CMAKE_CXX_CREATE_SHARED_LIBRARY}" )
 string( REPLACE "<CMAKE_CXX_COMPILER>" "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}" __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_C_COMPILER>"   "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}"   __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_SHARED_LIBRARY_CXX_FLAGS>" "${CMAKE_CXX_FLAGS}" __cmd "${__cmd}" )
 string( REPLACE "<LANGUAGE_COMPILE_FLAGS>" "" __cmd "${__cmd}" )
 string( REPLACE "<LINK_FLAGS>" "${CMAKE_SHARED_LINKER_FLAGS}" __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>" "-shared" __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG>" "" __cmd "${__cmd}" )
 string( REPLACE "<TARGET_SONAME>" "" __cmd "${__cmd}" )
 string( REPLACE "<TARGET>" "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/toolchain_crtlink_test.so" __cmd "${__cmd}" )
 string( REPLACE "<OBJECTS>" "\"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o\"" __cmd "${__cmd}" )
 string( REPLACE "<LINK_LIBRARIES>" "" __cmd "${__cmd}" )
 separate_arguments( __cmd )
 foreach( __var ANDROID_NDK ANDROID_NDK_TOOLCHAINS_PATH ANDROID_STANDALONE_TOOLCHAIN )
  if( ${__var} )
   set( __tmp "${${__var}}" )
   separate_arguments( __tmp )
   string( REPLACE "${__tmp}" "${${__var}}" __cmd "${__cmd}")
  endif()
 endforeach()
 string( REPLACE "'" "" __cmd "${__cmd}" )
 string( REPLACE "\"" "" __cmd "${__cmd}" )
 execute_process( COMMAND ${__cmd} RESULT_VARIABLE __cmd_result OUTPUT_QUIET ERROR_QUIET )
 if( __cmd_result EQUAL 0 )
  set( ANDROID_EXPLICIT_CRT_LINK ON )
 else()
  set( ANDROID_EXPLICIT_CRT_LINK OFF )
 endif()
endif()

if( ANDROID_EXPLICIT_CRT_LINK )
 set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} \"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o\"" )
 set( CMAKE_CXX_CREATE_SHARED_MODULE  "${CMAKE_CXX_CREATE_SHARED_MODULE} \"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o\"" )
endif()

# setup output directories
set( CMAKE_INSTALL_PREFIX "${ANDROID_TOOLCHAIN_ROOT}/user" CACHE STRING "path for installing" )

if( DEFINED LIBRARY_OUTPUT_PATH_ROOT
      OR EXISTS "${CMAKE_SOURCE_DIR}/AndroidManifest.xml"
      OR (EXISTS "${CMAKE_SOURCE_DIR}/../AndroidManifest.xml" AND EXISTS "${CMAKE_SOURCE_DIR}/../jni/") )
  set( LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_SOURCE_DIR} CACHE PATH "Root for binaries output, set this to change where Android libs are installed to" )
  if( NOT _CMAKE_IN_TRY_COMPILE )
    if( EXISTS "${CMAKE_SOURCE_DIR}/jni/CMakeLists.txt" )
      set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin/${ANDROID_NDK_ABI_NAME}" CACHE PATH "Output directory for applications" )
    else()
      set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin" CACHE PATH "Output directory for applications" )
    endif()
    set( LIBRARY_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}" CACHE PATH "Output directory for Android libs" )
  endif()
endif()

# copy shaed stl library to build directory
if( NOT _CMAKE_IN_TRY_COMPILE AND __libstl MATCHES "[.]so$" AND DEFINED LIBRARY_OUTPUT_PATH )
  get_filename_component( __libstlname "${__libstl}" NAME )
  execute_process( COMMAND "${CMAKE_COMMAND}" -E copy_if_different "${__libstl}" "${LIBRARY_OUTPUT_PATH}/${__libstlname}" RESULT_VARIABLE __fileCopyProcess )
  if( NOT __fileCopyProcess EQUAL 0 OR NOT EXISTS "${LIBRARY_OUTPUT_PATH}/${__libstlname}")
    message( SEND_ERROR "Failed copying of ${__libstl} to the ${LIBRARY_OUTPUT_PATH}/${__libstlname}" )
  endif()
  unset( __fileCopyProcess )
  unset( __libstlname )
endif()


# set these global flags for cmake client scripts to change behavior
set( ANDROID True )
set( BUILD_ANDROID True )

# where is the target environment
set( CMAKE_FIND_ROOT_PATH "${ANDROID_TOOLCHAIN_ROOT}/bin" "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" "${ANDROID_SYSROOT}" "${CMAKE_INSTALL_PREFIX}" "${CMAKE_INSTALL_PREFIX}/share" )

# only search for libraries and includes in the ndk toolchain
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )


# macro to find packages on the host OS
macro( find_host_package )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
 if( CMAKE_HOST_WIN32 )
  SET( WIN32 1 )
  SET( UNIX )
 elseif( CMAKE_HOST_APPLE )
  SET( APPLE 1 )
  SET( UNIX )
 endif()
 find_package( ${ARGN} )
 SET( WIN32 )
 SET( APPLE )
 SET( UNIX 1 )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endmacro()


# macro to find programs on the host OS
macro( find_host_program )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
 if( CMAKE_HOST_WIN32 )
  SET( WIN32 1 )
  SET( UNIX )
 elseif( CMAKE_HOST_APPLE )
  SET( APPLE 1 )
  SET( UNIX )
 endif()
 find_program( ${ARGN} )
 SET( WIN32 )
 SET( APPLE )
 SET( UNIX 1 )
 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endmacro()


# export toolchain settings for the try_compile() command
if( NOT _CMAKE_IN_TRY_COMPILE )
 set( __toolchain_config "")
 foreach( __var NDK_CCACHE  LIBRARY_OUTPUT_PATH_ROOT  ANDROID_FORBID_SYGWIN
                ANDROID_NDK_HOST_X64
                ANDROID_NDK
                ANDROID_NDK_LAYOUT
                ANDROID_STANDALONE_TOOLCHAIN
                ANDROID_TOOLCHAIN_NAME
                ANDROID_ABI
                ANDROID_NATIVE_API_LEVEL
                ANDROID_STL
                ANDROID_STL_FORCE_FEATURES
                ANDROID_FORCE_ARM_BUILD
                ANDROID_NO_UNDEFINED
                ANDROID_SO_UNDEFINED
                ANDROID_FUNCTION_LEVEL_LINKING
                ANDROID_GOLD_LINKER
                ANDROID_NOEXECSTACK
                ANDROID_RELRO
                ANDROID_LIBM_PATH
                ANDROID_EXPLICIT_CRT_LINK
                ANDROID_APP_PIE
                )
  if( DEFINED ${__var} )
   if( ${__var} MATCHES " ")
    set( __toolchain_config "${__toolchain_config}set( ${__var} \"${${__var}}\" CACHE INTERNAL \"\" )\n" )
   else()
    set( __toolchain_config "${__toolchain_config}set( ${__var} ${${__var}} CACHE INTERNAL \"\" )\n" )
   endif()
  endif()
 endforeach()
 file( WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/android.toolchain.config.cmake" "${__toolchain_config}" )
 unset( __toolchain_config )
endif()


# force cmake to produce / instead of \ in build commands for Ninja generator
if( CMAKE_GENERATOR MATCHES "Ninja" AND CMAKE_HOST_WIN32 )
 # it is a bad hack after all
 # CMake generates Ninja makefiles with UNIX paths only if it thinks that we are going to build with MinGW
 set( CMAKE_COMPILER_IS_MINGW TRUE ) # tell CMake that we are MinGW
 set( CMAKE_CROSSCOMPILING TRUE )    # stop recursion
 enable_language( C )
 enable_language( CXX )
 # unset( CMAKE_COMPILER_IS_MINGW ) # can't unset because CMake does not convert back-slashes in response files without it
 unset( MINGW )
endif()


# Variables controlling behavior or set by cmake toolchain:
#   ANDROID_ABI : "armeabi-v7a" (default), "armeabi", "armeabi-v7a with NEON", "armeabi-v7a with VFPV3", "armeabi-v6 with VFP", "x86", "mips", "arm64-v8a", "x86_64", "mips64"
#   ANDROID_NATIVE_API_LEVEL : 3,4,5,8,9,14,15,16,17,18,19,21 (depends on NDK version)
#   ANDROID_STL : gnustl_static/gnustl_shared/stlport_static/stlport_shared/gabi++_static/gabi++_shared/system_re/system/none
#   ANDROID_FORBID_SYGWIN : ON/OFF
#   ANDROID_NO_UNDEFINED : ON/OFF
#   ANDROID_SO_UNDEFINED : OFF/ON  (default depends on NDK version)
#   ANDROID_FUNCTION_LEVEL_LINKING : ON/OFF
#   ANDROID_GOLD_LINKER : ON/OFF
#   ANDROID_NOEXECSTACK : ON/OFF
#   ANDROID_RELRO : ON/OFF
#   ANDROID_FORCE_ARM_BUILD : ON/OFF
#   ANDROID_STL_FORCE_FEATURES : ON/OFF
#   ANDROID_LIBM_PATH : path to libm.so (set to something like $(TOP)/out/target/product/<product_name>/obj/lib/libm.so) to workaround unresolved `sincos`
# Can be set only at the first run:
#   ANDROID_NDK : path to your NDK install
#   NDK_CCACHE : path to your ccache executable
#   ANDROID_TOOLCHAIN_NAME : the NDK name of compiler toolchain
#   ANDROID_NDK_HOST_X64 : try to use x86_64 toolchain (default for x64 host systems)
#   ANDROID_NDK_LAYOUT : the inner NDK structure (RELEASE, LINARO, ANDROID)
#   LIBRARY_OUTPUT_PATH_ROOT : <any valid path>
#   ANDROID_STANDALONE_TOOLCHAIN
#
# Primary read-only variables:
#   ANDROID : always TRUE
#   ARMEABI : TRUE for arm v6 and older devices
#   ARMEABI_V6 : TRUE for arm v6
#   ARMEABI_V7A : TRUE for arm v7a
#   ARM64_V8A : TRUE for arm64-v8a
#   NEON : TRUE if NEON unit is enabled
#   VFPV3 : TRUE if VFP version 3 is enabled
#   X86 : TRUE if configured for x86
#   X86_64 : TRUE if configured for x86_64
#   MIPS : TRUE if configured for mips
#   MIPS64 : TRUE if configured for mips64
#   BUILD_WITH_ANDROID_NDK : TRUE if NDK is used
#   BUILD_WITH_STANDALONE_TOOLCHAIN : TRUE if standalone toolchain is used
#   ANDROID_NDK_HOST_SYSTEM_NAME : "windows", "linux-x86" or "darwin-x86" depending on host platform
#   ANDROID_NDK_ABI_NAME : "armeabi", "armeabi-v7a", "x86", "mips", "arm64-v8a", "x86_64", "mips64" depending on ANDROID_ABI
#   ANDROID_NDK_RELEASE : from r5 to r10d; set only for NDK
#   ANDROID_NDK_RELEASE_NUM : numeric ANDROID_NDK_RELEASE version (1000*major+minor)
#   ANDROID_ARCH_NAME : "arm", "x86", "mips", "arm64", "x86_64", "mips64" depending on ANDROID_ABI
#   ANDROID_SYSROOT : path to the compiler sysroot
#   TOOL_OS_SUFFIX : "" or ".exe" depending on host platform
#   ANDROID_COMPILER_IS_CLANG : TRUE if clang compiler is used
#
# Secondary (less stable) read-only variables:
#   ANDROID_COMPILER_VERSION : GCC version used (not Clang version)
#   ANDROID_CLANG_VERSION : version of clang compiler if clang is used
#   ANDROID_CXX_FLAGS : C/C++ compiler flags required by Android platform
#   ANDROID_SUPPORTED_ABIS : list of currently allowed values for ANDROID_ABI
#   ANDROID_TOOLCHAIN_MACHINE_NAME : "arm-linux-androideabi", "arm-eabi" or "i686-android-linux"
#   ANDROID_TOOLCHAIN_ROOT : path to the top level of toolchain (standalone or placed inside NDK)
#   ANDROID_CLANG_TOOLCHAIN_ROOT : path to clang tools
#   ANDROID_SUPPORTED_NATIVE_API_LEVELS : list of native API levels found inside NDK
#   ANDROID_STL_INCLUDE_DIRS : stl include paths
#   ANDROID_RTTI : if rtti is enabled by the runtime
#   ANDROID_EXCEPTIONS : if exceptions are enabled by the runtime
#   ANDROID_GCC_TOOLCHAIN_NAME : read-only, differs from ANDROID_TOOLCHAIN_NAME only if clang is used
#
# Defaults:
#   ANDROID_DEFAULT_NDK_API_LEVEL
#   ANDROID_DEFAULT_NDK_API_LEVEL_${ARCH}
#   ANDROID_NDK_SEARCH_PATHS
#   ANDROID_SUPPORTED_ABIS_${ARCH}
#   ANDROID_SUPPORTED_NDK_VERSIONS
Show full blame