2011-09-28 08:14:41 +00:00
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dnl $Id: aclocal.m4,v 1.8 2011/05/20 01:45:25 djm Exp $
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2008-07-22 18:58:19 +00:00
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dnl
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dnl OpenSSH-specific autoconf macros
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dnl
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2011-09-28 08:14:41 +00:00
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dnl OSSH_CHECK_CFLAG_COMPILE(check_flag[, define_flag])
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dnl Check that $CC accepts a flag 'check_flag'. If it is supported append
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dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append
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dnl 'check_flag'.
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AC_DEFUN([OSSH_CHECK_CFLAG_COMPILE], [{
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AC_MSG_CHECKING([if $CC supports $1])
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $1"
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_define_flag="$2"
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test "x$_define_flag" = "x" && _define_flag="$1"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int main(void) { return 0; }]])],
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[ AC_MSG_RESULT([yes])
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CFLAGS="$saved_CFLAGS $_define_flag"],
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[ AC_MSG_RESULT([no])
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CFLAGS="$saved_CFLAGS" ]
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)
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}])
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2008-07-22 18:58:19 +00:00
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dnl OSSH_CHECK_HEADER_FOR_FIELD(field, header, symbol)
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dnl Does AC_EGREP_HEADER on 'header' for the string 'field'
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dnl If found, set 'symbol' to be defined. Cache the result.
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dnl TODO: This is not foolproof, better to compile and read from there
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AC_DEFUN(OSSH_CHECK_HEADER_FOR_FIELD, [
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# look for field '$1' in header '$2'
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dnl This strips characters illegal to m4 from the header filename
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ossh_safe=`echo "$2" | sed 'y%./+-%__p_%'`
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dnl
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ossh_varname="ossh_cv_$ossh_safe""_has_"$1
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AC_MSG_CHECKING(for $1 field in $2)
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AC_CACHE_VAL($ossh_varname, [
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AC_EGREP_HEADER($1, $2, [ dnl
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eval "$ossh_varname=yes" dnl
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], [ dnl
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eval "$ossh_varname=no" dnl
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]) dnl
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])
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ossh_result=`eval 'echo $'"$ossh_varname"`
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if test -n "`echo $ossh_varname`"; then
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AC_MSG_RESULT($ossh_result)
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if test "x$ossh_result" = "xyes"; then
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AC_DEFINE($3, 1, [Define if you have $1 in $2])
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fi
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else
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AC_MSG_RESULT(no)
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fi
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])
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dnl Check for socklen_t: historically on BSD it is an int, and in
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dnl POSIX 1g it is a type of its own, but some platforms use different
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dnl types for the argument to getsockopt, getpeername, etc. So we
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dnl have to test to find something that will work.
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AC_DEFUN([TYPE_SOCKLEN_T],
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[
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AC_CHECK_TYPE([socklen_t], ,[
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AC_MSG_CHECKING([for socklen_t equivalent])
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AC_CACHE_VAL([curl_cv_socklen_t_equiv],
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[
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# Systems have either "struct sockaddr *" or
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# "void *" as the second argument to getpeername
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curl_cv_socklen_t_equiv=
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for arg2 in "struct sockaddr" void; do
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for t in int size_t unsigned long "unsigned long"; do
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AC_TRY_COMPILE([
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#include <sys/types.h>
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#include <sys/socket.h>
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int getpeername (int, $arg2 *, $t *);
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],[
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$t len;
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getpeername(0,0,&len);
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],[
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curl_cv_socklen_t_equiv="$t"
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break
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])
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done
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done
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if test "x$curl_cv_socklen_t_equiv" = x; then
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AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
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fi
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])
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AC_MSG_RESULT($curl_cv_socklen_t_equiv)
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AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
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[type to use in place of socklen_t if not defined])],
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[#include <sys/types.h>
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#include <sys/socket.h>])
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])
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