1dnl $Id: aclocal.m4,v 1.6 2005/09/19 16:33:39 tim Exp $ 2dnl 3dnl OpenSSH-specific autoconf macros 4dnl 5 6 7dnl OSSH_CHECK_HEADER_FOR_FIELD(field, header, symbol) 8dnl Does AC_EGREP_HEADER on 'header' for the string 'field' 9dnl If found, set 'symbol' to be defined. Cache the result. 10dnl TODO: This is not foolproof, better to compile and read from there 11AC_DEFUN(OSSH_CHECK_HEADER_FOR_FIELD, [ 12# look for field '$1' in header '$2' 13 dnl This strips characters illegal to m4 from the header filename 14 ossh_safe=`echo "$2" | sed 'y%./+-%__p_%'` 15 dnl 16 ossh_varname="ossh_cv_$ossh_safe""_has_"$1 17 AC_MSG_CHECKING(for $1 field in $2) 18 AC_CACHE_VAL($ossh_varname, [ 19 AC_EGREP_HEADER($1, $2, [ dnl 20 eval "$ossh_varname=yes" dnl 21 ], [ dnl 22 eval "$ossh_varname=no" dnl 23 ]) dnl 24 ]) 25 ossh_result=`eval 'echo $'"$ossh_varname"` 26 if test -n "`echo $ossh_varname`"; then 27 AC_MSG_RESULT($ossh_result) 28 if test "x$ossh_result" = "xyes"; then 29 AC_DEFINE($3, 1, [Define if you have $1 in $2]) 30 fi 31 else 32 AC_MSG_RESULT(no) 33 fi 34]) 35 36dnl OSSH_PATH_ENTROPY_PROG(variablename, command): 37dnl Tidiness function, sets 'undef' if not found, and does the AC_SUBST 38AC_DEFUN(OSSH_PATH_ENTROPY_PROG, [ 39 AC_PATH_PROG($1, $2) 40 if test -z "[$]$1" ; then 41 $1="undef" 42 fi 43 AC_SUBST($1) 44]) 45 46dnl Check for socklen_t: historically on BSD it is an int, and in 47dnl POSIX 1g it is a type of its own, but some platforms use different 48dnl types for the argument to getsockopt, getpeername, etc. So we 49dnl have to test to find something that will work. 50AC_DEFUN([TYPE_SOCKLEN_T], 51[ 52 AC_CHECK_TYPE([socklen_t], ,[ 53 AC_MSG_CHECKING([for socklen_t equivalent]) 54 AC_CACHE_VAL([curl_cv_socklen_t_equiv], 55 [ 56 # Systems have either "struct sockaddr *" or 57 # "void *" as the second argument to getpeername 58 curl_cv_socklen_t_equiv= 59 for arg2 in "struct sockaddr" void; do 60 for t in int size_t unsigned long "unsigned long"; do 61 AC_TRY_COMPILE([ 62 #include <sys/types.h> 63 #include <sys/socket.h> 64 65 int getpeername (int, $arg2 *, $t *); 66 ],[ 67 $t len; 68 getpeername(0,0,&len); 69 ],[ 70 curl_cv_socklen_t_equiv="$t" 71 break 72 ]) 73 done 74 done 75 76 if test "x$curl_cv_socklen_t_equiv" = x; then 77 AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) 78 fi 79 ]) 80 AC_MSG_RESULT($curl_cv_socklen_t_equiv) 81 AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv, 82 [type to use in place of socklen_t if not defined])], 83 [#include <sys/types.h> 84#include <sys/socket.h>]) 85]) 86 87