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/trunk/Tools/config/ac_compile_warnings.m4

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Possible License(s): LGPL-2.1, Cube, GPL-3.0, 0BSD, GPL-2.0 
    

  1. dnl @synopsis AC_COMPILE_WARNINGS
    2. 

  2. dnl
    3. 

  3. dnl Set the maximum warning verbosity according to C and C++ compiler used.
    4. 

  4. dnl Currently supports g++ and gcc.
    5. 

  5. dnl
    6. 

  6. dnl The compiler options are always added CFLAGS and CXXFLAGS even if
    7. 

  7. dnl these are overidden at configure time. Removing the maximum warning
    8. 

  8. dnl flags can be removed with --without-maximum-compile-warnings. For example:
    9. 

  9. dnl
    10. 

  10. dnl   ./configure --without-maximum-compile-warnings CFLAGS= CXXFLAGS=
    11. 

  11. dnl
    12. 

  12. dnl @category Misc
    13. 

  13. dnl @author Loic Dachary <loic@senga.org>
    14. 

  14. dnl @author William Fulton <wsf@fultondesigns.co.uk>
    15. 

  15. dnl @version 2005-04-29
    16. 

  16. dnl @license GPLWithACException
    17. 

  17. 

  18. AC_DEFUN([AC_COMPILE_WARNINGS], [
    19. 

  19. AC_MSG_CHECKING([maximum warning verbosity option])
    20. 

  20.   AC_REQUIRE([AC_PROG_CC])
    21. 

  21.   AC_REQUIRE([AC_PROG_CXX])
    22. 

  22. 

  23.   AC_ARG_WITH([maximum-compile-warnings], 
    24. 

  24.               AS_HELP_STRING([--without-maximum-compile-warnings],
    25. 

  25.                              [Disable maximum warning verbosity]),
    26. 

  26.               [ac_compile_warnings_on="$withval"],
    27. 

  27.               [ac_compile_warnings_on=""])
    28. 

  28. 

  29.   if test x"$ac_compile_warnings_on" = xno
    30. 

  30.   then
    31. 

  31.     ac_compile_warnings_msg=no
    32. 

  32.   else
    33. 

  33.     if test -n "$CXX"
    34. 

  34.     then
    35. 

  35.       if test "$GXX" = "yes"
    36. 

  36.       then
    37. 

  37.         ac_compile_warnings_opt='-Wall -W -ansi -pedantic'
    38. 

  38.       fi
    39. 

  39.       CXXFLAGS="$CXXFLAGS $ac_compile_warnings_opt"
    40. 

  40.       ac_compile_warnings_msg="$ac_compile_warnings_opt for C++"
    41. 

  41.     fi
    42. 

  42. 

  43.   if test -n "$CC"
    44. 

  44.   then
    45. 

  45.     if test "$GCC" = "yes"
    46. 

  46.     then
    47. 

  47.       ac_compile_warnings_opt='-Wall -W -ansi -pedantic'
    48. 

  48.     fi
    49. 

  49.     CFLAGS="$CFLAGS $ac_compile_warnings_opt"
    50. 

  50.     ac_compile_warnings_msg="$ac_compile_warnings_msg $ac_compile_warnings_opt for C"
    51. 

  51.   fi
    52. 

  52.   fi
    53. 

  53.   AC_MSG_RESULT([$ac_compile_warnings_msg])
    54. 

  54.   unset ac_compile_warnings_msg
    55. 

  55.   unset ac_compile_warnings_opt
    56. 

  56. ])
    57. 

  57.