diff options
| -rw-r--r-- | ares/configure.ac | 1 | ||||
| -rw-r--r-- | ares/m4/cares-functions.m4 | 106 |
2 files changed, 107 insertions, 0 deletions
diff --git a/ares/configure.ac b/ares/configure.ac index bc98a5e7f..159d98fe2 100644 --- a/ares/configure.ac +++ b/ares/configure.ac @@ -645,6 +645,7 @@ CURL_CHECK_FUNC_RECVFROM CURL_CHECK_FUNC_SEND CURL_CHECK_MSG_NOSIGNAL +CARES_CHECK_FUNC_GETHOSTNAME CARES_CHECK_FUNC_STRCASECMP CARES_CHECK_FUNC_STRCMPI CARES_CHECK_FUNC_STRDUP diff --git a/ares/m4/cares-functions.m4 b/ares/m4/cares-functions.m4 index d98513573..e1ba24083 100644 --- a/ares/m4/cares-functions.m4 +++ b/ares/m4/cares-functions.m4 @@ -64,6 +64,112 @@ cares_includes_sys_uio="\ ]) +dnl CARES_INCLUDES_UNISTD +dnl ------------------------------------------------- +dnl Set up variable with list of headers that must be +dnl included when unistd.h is to be included. + +AC_DEFUN([CARES_INCLUDES_UNISTD], [ +cares_includes_unistd="\ +/* includes start */ +#ifdef HAVE_SYS_TYPES_H +# include <sys/types.h> +#endif +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif +/* includes end */" + AC_CHECK_HEADERS( + sys/types.h unistd.h, + [], [], [$cares_includes_unistd]) +]) + + +dnl CARES_CHECK_FUNC_GETHOSTNAME +dnl ------------------------------------------------- +dnl Verify if gethostname is available, prototyped, and +dnl can be compiled. If all of these are true, and +dnl usage has not been previously disallowed with +dnl shell variable cares_disallow_gethostname, then +dnl HAVE_GETHOSTNAME will be defined. + +AC_DEFUN([CARES_CHECK_FUNC_GETHOSTNAME], [ + AC_REQUIRE([CARES_INCLUDES_UNISTD])dnl + # + tst_links_gethostname="unknown" + tst_proto_gethostname="unknown" + tst_compi_gethostname="unknown" + tst_allow_gethostname="unknown" + # + AC_MSG_CHECKING([if gethostname can be linked]) + AC_LINK_IFELSE([ + AC_LANG_FUNC_LINK_TRY([gethostname]) + ],[ + AC_MSG_RESULT([yes]) + tst_links_gethostname="yes" + ],[ + AC_MSG_RESULT([no]) + tst_links_gethostname="no" + ]) + # + if test "$tst_links_gethostname" = "yes"; then + AC_MSG_CHECKING([if gethostname is prototyped]) + AC_EGREP_CPP([gethostname],[ + $cares_includes_unistd + ],[ + AC_MSG_RESULT([yes]) + tst_proto_gethostname="yes" + ],[ + AC_MSG_RESULT([no]) + tst_proto_gethostname="no" + ]) + fi + # + if test "$tst_proto_gethostname" = "yes"; then + AC_MSG_CHECKING([if gethostname is compilable]) + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ + $cares_includes_unistd + ]],[[ + if(0 != gethostname(0, 0)) + return 1; + ]]) + ],[ + AC_MSG_RESULT([yes]) + tst_compi_gethostname="yes" + ],[ + AC_MSG_RESULT([no]) + tst_compi_gethostname="no" + ]) + fi + # + if test "$tst_compi_gethostname" = "yes"; then + AC_MSG_CHECKING([if gethostname usage allowed]) + if test "x$cares_disallow_gethostname" != "xyes"; then + AC_MSG_RESULT([yes]) + tst_allow_gethostname="yes" + else + AC_MSG_RESULT([no]) + tst_allow_gethostname="no" + fi + fi + # + AC_MSG_CHECKING([if gethostname might be used]) + if test "$tst_links_gethostname" = "yes" && + test "$tst_proto_gethostname" = "yes" && + test "$tst_compi_gethostname" = "yes" && + test "$tst_allow_gethostname" = "yes"; then + AC_MSG_RESULT([yes]) + AC_DEFINE_UNQUOTED(HAVE_GETHOSTNAME, 1, + [Define to 1 if you have the gethostname function.]) + ac_cv_func_gethostname="yes" + else + AC_MSG_RESULT([no]) + ac_cv_func_gethostname="no" + fi +]) + + dnl CARES_CHECK_FUNC_STRCASECMP dnl ------------------------------------------------- dnl Verify if strcasecmp is available, prototyped, and |