m4/pdns_check_os.m4

   1 AC_DEFUN([PDNS_CHECK_OS],[
   2   THREADFLAGS=""
   3
   4   case "$host_os" in
   5   solaris2.1*)
   6     LIBS="-lposix4 -lpthread $LIBS"
   7     CXXFLAGS="-D_REENTRANT $CXXFLAGS"
   8     have_solaris="yes"
   9     ;;
  10   solaris2.8 | solaris2.9 )
  11     AC_DEFINE(NEED_POSIX_TYPEDEF,,[If POSIX typedefs need to be defined])
  12     AC_DEFINE(NEED_INET_NTOP_PROTO,,[If your OS is so broken that it needs an additional prototype])
  13     LIBS="-lposix4 -lpthread $LIBS"
  14     CXXFLAGS="-D_REENTRANT $CXXFLAGS"
  15     have_solaris="yes"
  16     ;;
  17   linux*)
  18     THREADFLAGS="-pthread"
  19     have_linux="yes"
  20     ;;
  21   darwin*)
  22     CXXFLAGS="-D__APPLE_USE_RFC_3542 -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE $CXXFLAGS"
  23     ;;
  24   freebsd*)
  25     THREADFLAGS="-pthread"
  26     have_freebsd="yes"
  27     ;;
  28   *)
  29     LDFLAGS="-pthread $LDFLAGS"
  30     CXXFLAGS="-pthread $CXXFLAGS"
  31     ;;
  32   esac
  33
  34   AM_CONDITIONAL([HAVE_FREEBSD], [test "x$have_freebsd" = "xyes"])
  35   AM_CONDITIONAL([HAVE_LINUX], [test "x$have_linux" = "xyes"])
  36   AM_CONDITIONAL([HAVE_SOLARIS], [test "x$have_solaris" = "xyes"])
  37
  38   AC_MSG_CHECKING([whether -latomic is needed for __atomic builtins])
  39   AC_LINK_IFELSE(
  40     [AC_LANG_PROGRAM([[#include <stdint.h>]],
  41        [[uint64_t val = 0; __atomic_add_fetch(&val, 1, __ATOMIC_RELAXED);]]
  42     )],
  43     [AC_MSG_RESULT([no])],
  44     [LIBS="$LIBS -latomic"
  45      AC_LINK_IFELSE(
  46        [AC_LANG_PROGRAM([[#include <stdint.h>]],
  47                [[uint64_t val = 0; __atomic_add_fetch(&val, 1, __ATOMIC_RELAXED);]]
  48        )],
  49        [AC_MSG_RESULT([yes])],
  50        [AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, cannot continue])]
  51     )]
  52   )
  53
  54   AC_SUBST(THREADFLAGS)
  55   AC_SUBST([DYNLINKFLAGS], [-export-dynamic])
  56 ])