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-rw-r--r--ares/acinclude.m438
-rw-r--r--ares/configure.ac2
2 files changed, 39 insertions, 1 deletions
diff --git a/ares/acinclude.m4 b/ares/acinclude.m4
index 8cadce163..e5d96b25f 100644
--- a/ares/acinclude.m4
+++ b/ares/acinclude.m4
@@ -96,6 +96,44 @@ CURL_DEF_TOKEN $1
])
+dnl CURL_CHECK_DEF_CC (SYMBOL, [INCLUDES], [SILENT])
+dnl -------------------------------------------------
+dnl Use the C compiler to find out only if the given symbol is defined
+dnl or not, this can not find out its expansion. This macro will not use
+dnl default includes even if no INCLUDES argument is given. This macro
+dnl will run silently when invoked with three arguments.
+
+AC_DEFUN([CURL_CHECK_DEF_CC], [
+ AS_VAR_PUSHDEF([ac_HaveDef], [curl_cv_have_def_$1])dnl
+ ifelse($3,,[AC_MSG_CHECKING([for compiler definition of $1])])
+ AC_COMPILE_IFELSE([
+ AC_LANG_SOURCE(
+ifelse($2,,,[$2])[[
+int main (void)
+{
+#ifdef $1
+ return 0;
+#else
+ force compilation error
+#endif
+}
+ ]])
+ ],[
+ tst_symbol_defined="yes"
+ ],[
+ tst_symbol_defined="no"
+ ])
+ if test "$tst_symbol_defined" = "yes"; then
+ AS_VAR_SET(ac_HaveDef, yes)
+ ifelse($3,,[AC_MSG_RESULT([yes])])
+ else
+ AS_VAR_SET(ac_HaveDef, no)
+ ifelse($3,,[AC_MSG_RESULT([no])])
+ fi
+ AS_VAR_POPDEF([ac_HaveDef])dnl
+])
+
+
dnl CARES_CHECK_AIX_ALL_SOURCE
dnl -------------------------------------------------
dnl Provides a replacement of traditional AC_AIX with
diff --git a/ares/configure.ac b/ares/configure.ac
index 4111dc848..b91915e33 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -194,7 +194,7 @@ dnl **********************************************************************
tst_lib_xnet_required="no"
AC_MSG_CHECKING([if X/Open network library is required])
CURL_CHECK_DEF([__hpux], [], [silent])
-CURL_CHECK_DEF([_XOPEN_SOURCE_EXTENDED], [], [silent])
+CURL_CHECK_DEF_CC([_XOPEN_SOURCE_EXTENDED], [], [silent])
if test "$curl_cv_have_def__XOPEN_SOURCE_EXTENDED" = "yes" &&
test "$curl_cv_have_def___hpux" = "yes"; then
my_ac_save_LIBS=$LIBS