kwsysPlatformTestsC.c 2.2 KB

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  1. /* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
  2. file Copyright.txt or https://cmake.org/licensing#kwsys for details. */
  3. /*
  4. Macros to define main() in a cross-platform way.
  5. Usage:
  6. int KWSYS_PLATFORM_TEST_C_MAIN()
  7. {
  8. return 0;
  9. }
  10. int KWSYS_PLATFORM_TEST_C_MAIN_ARGS(argc, argv)
  11. {
  12. (void)argc; (void)argv;
  13. return 0;
  14. }
  15. */
  16. #if defined(__CLASSIC_C__)
  17. #define KWSYS_PLATFORM_TEST_C_MAIN() main()
  18. #define KWSYS_PLATFORM_TEST_C_MAIN_ARGS(argc, argv) \
  19. main(argc, argv) int argc; \
  20. char* argv[];
  21. #else
  22. #define KWSYS_PLATFORM_TEST_C_MAIN() main(void)
  23. #define KWSYS_PLATFORM_TEST_C_MAIN_ARGS(argc, argv) \
  24. main(int argc, char* argv[])
  25. #endif
  26. #ifdef TEST_KWSYS_C_HAS_PTRDIFF_T
  27. #include <stddef.h>
  28. int f(ptrdiff_t n)
  29. {
  30. return n > 0;
  31. }
  32. int KWSYS_PLATFORM_TEST_C_MAIN()
  33. {
  34. char* p = 0;
  35. ptrdiff_t d = p - p;
  36. (void)d;
  37. return f(p - p);
  38. }
  39. #endif
  40. #ifdef TEST_KWSYS_C_HAS_SSIZE_T
  41. #include <unistd.h>
  42. int f(ssize_t n)
  43. {
  44. return (int)n;
  45. }
  46. int KWSYS_PLATFORM_TEST_C_MAIN()
  47. {
  48. ssize_t n = 0;
  49. return f(n);
  50. }
  51. #endif
  52. #ifdef TEST_KWSYS_C_HAS_CLOCK_GETTIME_MONOTONIC
  53. #if defined(__APPLE__)
  54. #include <AvailabilityMacros.h>
  55. #if MAC_OS_X_VERSION_MIN_REQUIRED < 101200
  56. #error "clock_gettime not available on macOS < 10.12"
  57. #endif
  58. #endif
  59. #include <time.h>
  60. int KWSYS_PLATFORM_TEST_C_MAIN()
  61. {
  62. struct timespec ts;
  63. return clock_gettime(CLOCK_MONOTONIC, &ts);
  64. }
  65. #endif
  66. #ifdef TEST_KWSYS_C_TYPE_MACROS
  67. char* info_macros =
  68. #if defined(__SIZEOF_SHORT__)
  69. "INFO:macro[__SIZEOF_SHORT__]\n"
  70. #endif
  71. #if defined(__SIZEOF_INT__)
  72. "INFO:macro[__SIZEOF_INT__]\n"
  73. #endif
  74. #if defined(__SIZEOF_LONG__)
  75. "INFO:macro[__SIZEOF_LONG__]\n"
  76. #endif
  77. #if defined(__SIZEOF_LONG_LONG__)
  78. "INFO:macro[__SIZEOF_LONG_LONG__]\n"
  79. #endif
  80. #if defined(__SHORT_MAX__)
  81. "INFO:macro[__SHORT_MAX__]\n"
  82. #endif
  83. #if defined(__INT_MAX__)
  84. "INFO:macro[__INT_MAX__]\n"
  85. #endif
  86. #if defined(__LONG_MAX__)
  87. "INFO:macro[__LONG_MAX__]\n"
  88. #endif
  89. #if defined(__LONG_LONG_MAX__)
  90. "INFO:macro[__LONG_LONG_MAX__]\n"
  91. #endif
  92. "";
  93. int KWSYS_PLATFORM_TEST_C_MAIN_ARGS(argc, argv)
  94. {
  95. int require = 0;
  96. require += info_macros[argc];
  97. (void)argv;
  98. return require;
  99. }
  100. #endif