m4/cc.m4

   1 # arch-tag: 5b59cf27-9403-4203-9a20-b3e57ee97b45
   2
   3 AC_DEFUN([BHM4_CC_CHECK],[
   4
   5 AC_CHECK_TOOL(CC, cc)
   6
   7 WFLAGS=""
   8 WFLAGS_3X=""
   9 WFLAGS_29X=""
  10 if test "x$ac_compiler_gnu" = "xyes"; then
  11         WFLAGS='${WFLAGS_GCC}'
  12         AC_MSG_CHECKING(whether GCC supports -no-cpp-precomp)
  13         case $(${CC} -no-cpp-precomp 2>&1) in
  14                 *-no-cpp-precomp*)
  15                         AC_MSG_RESULT(no)
  16                         ;;
  17                 *)
  18                         CFLAGS="${CFLAGS} -no-cpp-precomp"
  19                         AC_MSG_RESULT(yes)
  20                         ;;
  21         esac
  22 else
  23         AC_MSG_CHECKING(whether we are using the Intel C compiler)
  24         if ${CC} -V 2>&1 | head -n 1 | grep -q "Intel(R)"; then
  25                 AC_MSG_RESULT(yes)
  26                 WFLAGS='${WFLAGS_ICC}'
  27                 ac_compiler_intel="yes"
  28         else
  29                 AC_MSG_RESULT(no)
  30                 ac_compiler_intel="no"
  31         fi
  32 fi
  33 AC_SUBST(WFLAGS)
  34 AC_SUBST(WFLAGS_29X)
  35 AC_SUBST(WFLAGS_3X)
  36
  37 AC_PROG_GCC_TRADITIONAL
  38
  39 AC_CACHE_CHECK([for __VA_ARGS__], [ac_cv_va_args],
  40                [ac_cv_va_args=no
  41                 AC_COMPILE_IFELSE(AC_LANG_PROGRAM(
  42                         [#include <stdarg.h>
  43                          #include <stdlib.h>
  44                          #include <syslog.h>
  45
  46                          #define vaarg_test(fmt,...) syslog (LOG_DEBUG, fmt, __VA_ARGS__)
  47                         ], [vaarg_test ("%d", atoi ("42"));]), [ac_cv_va_args=yes],
  48                         [ac_cv_va_args=no])])
  49 case ${ac_cv_va_args} in
  50         yes)
  51                 AC_DEFINE(HAVE___VA_ARGS__, 1,
  52                           [Define if you have __VA_ARGS__])
  53                 ;;
  54 esac
  55
  56 AC_CACHE_CHECK([whether the compiler supports gcc-style variadic macros],
  57                [ac_cv_variadic_macros], [ac_cv_variadic_macros=no
  58                 AC_COMPILE_IFELSE(AC_LANG_PROGRAM(
  59                 [[#include <stdarg.h>
  60                   #include <stdlib.h>
  61                   #include <syslog.h>
  62
  63                   #define gcc_vaarg_test(fmt,args...) syslog (LOG_DEBUG, fmt , ## args)
  64                 ]], [[ gcc_vaarg_test ("%d", atoi ("42")); ]]), [ac_cv_variadic_macros="yes"],
  65                 [ac_cv_variadic_macros="no"])])
  66 case ${ac_cv_variadic_macros} in
  67         yes)
  68                 AC_DEFINE_UNQUOTED(HAVE_VARIADIC_MACROS, 1,
  69                         Define this if you have GCC-style variadic macros)
  70                 ;;
  71 esac
  72
  73 ])