dnl ** Additional Autoconf tests for BIRD configure script dnl ** (c) 1999 Martin Mares <mj@ucw.cz> AC_DEFUN(BIRD_CHECK_INTEGERS, [AC_CHECK_SIZEOF(char, 0) AC_CHECK_SIZEOF(short int, 0) AC_CHECK_SIZEOF(int, 0) AC_CHECK_SIZEOF(long int, 0) for size in 1 2 4 ; do bits=`expr $size "*" 8` AC_MSG_CHECKING([for $bits-bit type]) if test $ac_cv_sizeof_int = $size ; then res=int elif test $ac_cv_sizeof_char = $size ; then res=char elif test $ac_cv_sizeof_short_int = $size ; then res="short int" elif test $ac_cv_sizeof_long_int = $size ; then res="long int" else AC_MSG_RESULT([not found]) AC_MSG_ERROR([Cannot find $bits-bit integer type.]) fi AC_MSG_RESULT($res) AC_DEFINE_UNQUOTED(INTEGER_$bits, $res) done ]) AC_DEFUN(BIRD_CHECK_ENDIAN, [AC_CACHE_CHECK([CPU endianity], bird_cv_c_endian,[ AC_TRY_RUN([ #include <stdio.h> unsigned int x = 0x12345678; unsigned char *z = (unsigned char *) &x; int main(void) { FILE *f = fopen("conftestresult", "w"); if (!f) return 10; fprintf(f, "%02x %02x %02x %02x", *z, *(z+1), *(z+2), *(z+3)); fclose(f); exit(0); } ],[ endian=`cat conftestresult` if test "$endian" = "12 34 56 78" ; then bird_cv_c_endian=big-endian elif test "$endian" = "78 56 34 12" ; then bird_cv_c_endian=little-endian fi ],[endian="test program failed"],[endian="not available, we're cross compiling"]) if test -z "$bird_cv_c_endian" ; then AC_MSG_RESULT($endian) AC_MSG_ERROR([Cannot determine CPU endianity.]) fi ]) case $bird_cv_c_endian in big-endian) AC_DEFINE(CPU_BIG_ENDIAN) ;; little-endian) AC_DEFINE(CPU_LITTLE_ENDIAN) ;; esac ]) AC_DEFUN(BIRD_CHECK_STRUCT_ALIGN, [AC_CACHE_CHECK([usual alignment of structures],bird_cv_c_struct_align,[ AC_TRY_RUN([ #include <stdio.h> struct { char x; long int y; } ary[2]; int main(void) { FILE *f = fopen("conftestresult", "w"); if (!f) return 10; fprintf(f, "%d", sizeof(ary)/2); fclose(f); exit(0); } ],[ bird_cv_c_struct_align=`cat conftestresult` ],[ AC_MSG_RESULT([test program failed]) AC_MSG_ERROR([Cannot determine structure alignment]) ],[bird_cv_c_struct_align=16]) ]) AC_DEFINE_UNQUOTED(CPU_STRUCT_ALIGN, $bird_cv_c_struct_align) ]) AC_DEFUN(BIRD_CHECK_TIME_T, [AC_CACHE_CHECK([characteristics of time_t], bird_cv_type_time_t, [ AC_TRY_RUN([ #include <stdio.h> #include <sys/time.h> #include <limits.h> int main(void) { FILE *f = fopen("conftestresult", "w"); if (!f) return 10; fprintf(f, "%d-bit ", sizeof(time_t)*CHAR_BIT); if ((time_t) -1 > 0) fprintf(f, "un"); fprintf(f, "signed"); fclose(f); exit(0); } ],[bird_cv_type_time_t=`cat conftestresult` ],[ AC_MSG_RESULT([test program failed]) AC_MSG_ERROR([Cannot determine time_t size and signedness.]) ],[bird_cv_type_time_t="32-bit signed"]) ]) case "$bird_cv_type_time_t" in *64-bit*) AC_DEFINE(TIME_T_IS_64BIT) ;; esac case "$bird_cv_type_time_t" in *unsigned*) ;; *) AC_DEFINE(TIME_T_IS_SIGNED) ;; esac ]) AC_DEFUN(BIRD_CHECK_STRUCT_IP_MREQN, [AC_CACHE_CHECK([for struct ip_mreqn], bird_cv_struct_ip_mreqn,[ AC_TRY_COMPILE([#include <netinet/in.h> ],[struct ip_mreqn x; ],[bird_cv_struct_ip_mreqn=yes ],[bird_cv_struct_ip_mreqn=no ])]) if test "$bird_cv_struct_ip_mreqn" = yes ; then AC_DEFINE(HAVE_STRUCT_IP_MREQN) fi ]) AC_DEFUN(BIRD_CHECK_LINUX_VERSION, [AC_CACHE_CHECK([Linux kernel version], bird_cv_sys_linux_version, [ AC_REQUIRE_CPP()dnl cat > conftest.$ac_ext <<EOF [#]line __oline__ "configure" #include "confdefs.h" #include <linux/version.h> VERSION: UTS_RELEASE EOF bird_cv_sys_linux_version=`eval "$ac_cpp conftest.$ac_ext" 2>&AC_FD_CC | sed '/^VERSION/!d;s/^VERSION: "//;s/".*//'` rm -rf conftest* if test -z "$bird_cv_sys_linux_version" ; then AC_MSG_RESULT([unknown]) AC_MSG_ERROR([Cannot determine kernel version]) fi ])])