cmake/macros.cmake

   1 macro(check_clzll VARIABLE)
   2   check_c_source_compiles(
   3     "int main(int argc, char *argv[])
   4 {return __builtin_clzll(1LL);}"
   5     ${VARIABLE}
   6     )
   7 endmacro()
   8
   9 macro(check_bsr64 VARIABLE)
  10   check_c_source_compiles(
  11     "int main(int argc, char *argv[])
  12 {unsigned long foo; unsigned __int64 bar=1LL;
  13 return _BitScanReverse64(&foo, bar);}"
  14     ${VARIABLE}
  15     )
  16 endmacro()
  17
  18 macro(find_inline_keyword)
  19   #Inspired from http://www.cmake.org/Wiki/CMakeTestInline
  20   set(INLINE_TEST_SRC "/* Inspired by autoconf's c.m4 */
  21 static inline int static_foo(){return 0\;}
  22 int main(int argc, char *argv[]){return 0\;}
  23 ")
  24   file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/CMakeTestCInline.c
  25     ${INLINE_TEST_SRC})
  26
  27   foreach(KEYWORD "inline" "__inline__" "__inline")
  28     if(NOT DEFINED C_INLINE)
  29       try_compile(C_HAS_${KEYWORD}
  30         ${CMAKE_CURRENT_BINARY_DIR}
  31         ${CMAKE_CURRENT_BINARY_DIR}/CMakeTestCInline.c
  32         COMPILE_DEFINITIONS "-Dinline=${KEYWORD}"
  33         )
  34       if(C_HAS_${KEYWORD})
  35         set(C_INLINE TRUE)
  36         add_definitions("-Dinline=${KEYWORD}")
  37         message(STATUS "Inline keyword found - ${KEYWORD}")
  38       endif(C_HAS_${KEYWORD})
  39     endif(NOT DEFINED C_INLINE)
  40   endforeach(KEYWORD)
  41
  42   if(NOT DEFINED C_INLINE)
  43     add_definitions("-Dinline=")
  44     message(STATUS "Inline keyword - not found")
  45   endif(NOT DEFINED C_INLINE)
  46 endmacro(find_inline_keyword)
  47
  48 macro(find_restrict_keyword)
  49   set(RESTRICT_TEST_SRC "/* Inspired by autoconf's c.m4 */
  50 int foo (int * restrict ip){return ip[0]\;}
  51 int main(int argc, char *argv[]){int s[1]\;
  52 int * restrict t = s\; t[0] = 0\; return foo(t)\;}
  53 ")
  54
  55   file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/CMakeTestCRestrict.c
  56     ${RESTRICT_TEST_SRC})
  57
  58   foreach(KEYWORD "restrict" "__restrict" "__restrict__" "_Restrict")
  59     if(NOT DEFINED C_RESTRICT)
  60       try_compile(C_HAS_${KEYWORD}
  61         ${CMAKE_CURRENT_BINARY_DIR}
  62         ${CMAKE_CURRENT_BINARY_DIR}/CMakeTestCRestrict.c
  63         COMPILE_DEFINITIONS "-Drestrict=${KEYWORD}"
  64         )
  65       if(C_HAS_${KEYWORD})
  66         set(C_RESTRICT TRUE)
  67         add_definitions("-Drestrict=${KEYWORD}")
  68         message(STATUS "Restrict keyword found - ${KEYWORD}")
  69       endif(C_HAS_${KEYWORD})
  70     endif(NOT DEFINED C_RESTRICT)
  71   endforeach(KEYWORD)
  72
  73   if(NOT DEFINED C_RESTRICT)
  74     add_definitions("-Drestrict=")
  75     message(STATUS "Restrict keyword - not found")
  76   endif(NOT DEFINED C_RESTRICT)
  77 endmacro(find_restrict_keyword)