configure: ac_cv_ -> curl_cv_ for write-only vars

These configure vars are modified in a curl-specific way but never
evaluated or loaded from cache, even though they are designated as
_cv_. We could either implement proper AC_CACHE_CHECKs for them, or
remove them completely.

Fixes #603 as ac_cv_func_gethostbyname is no longer clobbered, and
AC_CHECK_FUNC(gethostbyname...) will no longer spuriously succeed after
the first configure run with caching.

`ac_cv_func_strcasecmp` is curious, see #770.

`eval "ac_cv_func_$func=yes"` can still cause problems as it works in
tandem with AC_CHECK_FUNCS and then potentially modifies its result. It
would be best to rewrite this test to use a new CURL_CHECK_FUNCS macro,
which works the same as AC_CHECK_FUNCS but relies on caching the values
of curl_cv_func_* variables, without modifiying ac_cv_func_*.

1 files changed, 103 insertions, 103 deletions

diff --git a/m4/curl-functions.m4 b/m4/curl-functions.m4
index 3e6ac924d..ee7a2521c 100644
--- a/m4/curl-functions.m4
+++ b/m4/curl-functions.m4
@@ -639,10 +639,10 @@ AC_DEFUN([CURL_CHECK_FUNC_ALARM], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_ALARM, 1,
       [Define to 1 if you have the alarm function.])
-    ac_cv_func_alarm="yes"
+    curl_cv_func_alarm="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_alarm="no"
+    curl_cv_func_alarm="no"
   fi
 ])
 
@@ -730,10 +730,10 @@ AC_DEFUN([CURL_CHECK_FUNC_BASENAME], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_BASENAME, 1,
       [Define to 1 if you have the basename function.])
-    ac_cv_func_basename="yes"
+    curl_cv_func_basename="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_basename="no"
+    curl_cv_func_basename="no"
   fi
 ])
 
@@ -824,10 +824,10 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOSESOCKET], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_CLOSESOCKET, 1,
       [Define to 1 if you have the closesocket function.])
-    ac_cv_func_closesocket="yes"
+    curl_cv_func_closesocket="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_closesocket="no"
+    curl_cv_func_closesocket="no"
   fi
 ])
 
@@ -914,10 +914,10 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOSESOCKET_CAMEL], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_CLOSESOCKET_CAMEL, 1,
       [Define to 1 if you have the CloseSocket camel case function.])
-    ac_cv_func_closesocket_camel="yes"
+    curl_cv_func_closesocket_camel="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_closesocket_camel="no"
+    curl_cv_func_closesocket_camel="no"
   fi
 ])
 
@@ -1012,10 +1012,10 @@ AC_DEFUN([CURL_CHECK_FUNC_CONNECT], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_CONNECT, 1,
       [Define to 1 if you have the connect function.])
-    ac_cv_func_connect="yes"
+    curl_cv_func_connect="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_connect="no"
+    curl_cv_func_connect="no"
   fi
 ])
 
@@ -1246,10 +1246,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FDOPEN], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_FDOPEN, 1,
       [Define to 1 if you have the fdopen function.])
-    ac_cv_func_fdopen="yes"
+    curl_cv_func_fdopen="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_fdopen="no"
+    curl_cv_func_fdopen="no"
   fi
 ])
 
@@ -1368,10 +1368,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FGETXATTR], [
       AC_DEFINE(HAVE_FGETXATTR_6, 1, [fgetxattr() takes 6 args])
     fi
     #
-    ac_cv_func_fgetxattr="yes"
+    curl_cv_func_fgetxattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_fgetxattr="no"
+    curl_cv_func_fgetxattr="no"
   fi
 ])
 
@@ -1490,10 +1490,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FLISTXATTR], [
       AC_DEFINE(HAVE_FLISTXATTR_4, 1, [flistxattr() takes 4 args])
     fi
     #
-    ac_cv_func_flistxattr="yes"
+    curl_cv_func_flistxattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_flistxattr="no"
+    curl_cv_func_flistxattr="no"
   fi
 ])
 
@@ -1586,10 +1586,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FREEADDRINFO], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_FREEADDRINFO, 1,
       [Define to 1 if you have the freeaddrinfo function.])
-    ac_cv_func_freeaddrinfo="yes"
+    curl_cv_func_freeaddrinfo="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_freeaddrinfo="no"
+    curl_cv_func_freeaddrinfo="no"
   fi
 ])
 
@@ -1670,10 +1670,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FREEIFADDRS], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_FREEIFADDRS, 1,
       [Define to 1 if you have the freeifaddrs function.])
-    ac_cv_func_freeifaddrs="yes"
+    curl_cv_func_freeifaddrs="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_freeifaddrs="no"
+    curl_cv_func_freeifaddrs="no"
   fi
 ])
 
@@ -1792,10 +1792,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FREMOVEXATTR], [
       AC_DEFINE(HAVE_FREMOVEXATTR_3, 1, [fremovexattr() takes 3 args])
     fi
     #
-    ac_cv_func_fremovexattr="yes"
+    curl_cv_func_fremovexattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_fremovexattr="no"
+    curl_cv_func_fremovexattr="no"
   fi
 ])
 
@@ -1914,10 +1914,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FSETXATTR], [
       AC_DEFINE(HAVE_FSETXATTR_6, 1, [fsetxattr() takes 6 args])
     fi
     #
-    ac_cv_func_fsetxattr="yes"
+    curl_cv_func_fsetxattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_fsetxattr="no"
+    curl_cv_func_fsetxattr="no"
   fi
 ])
 
@@ -1999,10 +1999,10 @@ AC_DEFUN([CURL_CHECK_FUNC_FTRUNCATE], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_FTRUNCATE, 1,
       [Define to 1 if you have the ftruncate function.])
-    ac_cv_func_ftruncate="yes"
+    curl_cv_func_ftruncate="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_ftruncate="no"
+    curl_cv_func_ftruncate="no"
   fi
 ])
 
@@ -2151,8 +2151,8 @@ AC_DEFUN([CURL_CHECK_FUNC_GETADDRINFO], [
     curl_cv_func_getaddrinfo="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_getaddrinfo_threadsafe="no"
     curl_cv_func_getaddrinfo="no"
+    curl_cv_func_getaddrinfo_threadsafe="no"
   fi
   #
   if test "$curl_cv_func_getaddrinfo" = "yes"; then
@@ -2263,9 +2263,9 @@ AC_DEFUN([CURL_CHECK_FUNC_GETADDRINFO], [
     if test "$tst_tsafe_getaddrinfo" = "yes"; then
       AC_DEFINE_UNQUOTED(HAVE_GETADDRINFO_THREADSAFE, 1,
         [Define to 1 if the getaddrinfo function is threadsafe.])
-      ac_cv_func_getaddrinfo_threadsafe="yes"
+      curl_cv_func_getaddrinfo_threadsafe="yes"
     else
-      ac_cv_func_getaddrinfo_threadsafe="no"
+      curl_cv_func_getaddrinfo_threadsafe="no"
     fi
   fi
 ])
@@ -2357,10 +2357,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETHOSTBYADDR], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_GETHOSTBYADDR, 1,
       [Define to 1 if you have the gethostbyaddr function.])
-    ac_cv_func_gethostbyaddr="yes"
+    curl_cv_func_gethostbyaddr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gethostbyaddr="no"
+    curl_cv_func_gethostbyaddr="no"
   fi
 ])
 
@@ -2450,10 +2450,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GAI_STRERROR], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_GAI_STRERROR, 1,
       [Define to 1 if you have the gai_strerror function.])
-    ac_cv_func_gai_strerror="yes"
+    curl_cv_func_gai_strerror="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gai_strerror="no"
+    curl_cv_func_gai_strerror="no"
   fi
 ])
 
@@ -2592,10 +2592,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETHOSTBYADDR_R], [
       AC_DEFINE(HAVE_GETHOSTBYADDR_R_8, 1, [gethostbyaddr_r() takes 8 args])
     fi
     #
-    ac_cv_func_gethostbyaddr_r="yes"
+    curl_cv_func_gethostbyaddr_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gethostbyaddr_r="no"
+    curl_cv_func_gethostbyaddr_r="no"
   fi
 ])
 
@@ -2686,10 +2686,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETHOSTBYNAME], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_GETHOSTBYNAME, 1,
       [Define to 1 if you have the gethostbyname function.])
-    ac_cv_func_gethostbyname="yes"
+    curl_cv_func_gethostbyname="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gethostbyname="no"
+    curl_cv_func_gethostbyname="no"
   fi
 ])
 
@@ -2828,10 +2828,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETHOSTBYNAME_R], [
       AC_DEFINE(HAVE_GETHOSTBYNAME_R_6, 1, [gethostbyname_r() takes 6 args])
     fi
     #
-    ac_cv_func_gethostbyname_r="yes"
+    curl_cv_func_gethostbyname_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gethostbyname_r="no"
+    curl_cv_func_gethostbyname_r="no"
   fi
 ])
 
@@ -2952,10 +2952,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETHOSTNAME], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_GETHOSTNAME, 1,
       [Define to 1 if you have the gethostname function.])
-    ac_cv_func_gethostname="yes"
+    curl_cv_func_gethostname="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gethostname="no"
+    curl_cv_func_gethostname="no"
   fi
 ])
 
@@ -3068,10 +3068,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETIFADDRS], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_GETIFADDRS, 1,
       [Define to 1 if you have a working getifaddrs function.])
-    ac_cv_func_getifaddrs="yes"
+    curl_cv_func_getifaddrs="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_getifaddrs="no"
+    curl_cv_func_getifaddrs="no"
   fi
 ])
 
@@ -3208,10 +3208,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETSERVBYPORT_R], [
       AC_DEFINE(GETSERVBYPORT_R_BUFSIZE, 4096,
         [Specifies the size of the buffer to pass to getservbyport_r])
     fi
-    ac_cv_func_getservbyport_r="yes"
+    curl_cv_func_getservbyport_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_getservbyport_r="no"
+    curl_cv_func_getservbyport_r="no"
   fi
 ])
 
@@ -3330,10 +3330,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GETXATTR], [
       AC_DEFINE(HAVE_GETXATTR_6, 1, [getxattr() takes 6 args])
     fi
     #
-    ac_cv_func_getxattr="yes"
+    curl_cv_func_getxattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_getxattr="no"
+    curl_cv_func_getxattr="no"
   fi
 ])
 
@@ -3446,10 +3446,10 @@ AC_DEFUN([CURL_CHECK_FUNC_GMTIME_R], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_GMTIME_R, 1,
       [Define to 1 if you have a working gmtime_r function.])
-    ac_cv_func_gmtime_r="yes"
+    curl_cv_func_gmtime_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_gmtime_r="no"
+    curl_cv_func_gmtime_r="no"
   fi
 ])
 
@@ -3570,10 +3570,10 @@ AC_DEFUN([CURL_CHECK_FUNC_INET_NTOA_R], [
       AC_DEFINE(HAVE_INET_NTOA_R_3, 1, [inet_ntoa_r() takes 3 args])
     fi
     #
-    ac_cv_func_inet_ntoa_r="yes"
+    curl_cv_func_inet_ntoa_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_inet_ntoa_r="no"
+    curl_cv_func_inet_ntoa_r="no"
   fi
 ])
 
@@ -3729,10 +3729,10 @@ AC_DEFUN([CURL_CHECK_FUNC_INET_NTOP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_INET_NTOP, 1,
       [Define to 1 if you have a IPv6 capable working inet_ntop function.])
-    ac_cv_func_inet_ntop="yes"
+    curl_cv_func_inet_ntop="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_inet_ntop="no"
+    curl_cv_func_inet_ntop="no"
   fi
 ])
 
@@ -3881,10 +3881,10 @@ AC_DEFUN([CURL_CHECK_FUNC_INET_PTON], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_INET_PTON, 1,
       [Define to 1 if you have a IPv6 capable working inet_pton function.])
-    ac_cv_func_inet_pton="yes"
+    curl_cv_func_inet_pton="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_inet_pton="no"
+    curl_cv_func_inet_pton="no"
   fi
 ])
 
@@ -4491,10 +4491,10 @@ AC_DEFUN([CURL_CHECK_FUNC_LISTXATTR], [
       AC_DEFINE(HAVE_LISTXATTR_4, 1, [listxattr() takes 4 args])
     fi
     #
-    ac_cv_func_listxattr="yes"
+    curl_cv_func_listxattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_listxattr="no"
+    curl_cv_func_listxattr="no"
   fi
 ])
 
@@ -4607,10 +4607,10 @@ AC_DEFUN([CURL_CHECK_FUNC_LOCALTIME_R], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_LOCALTIME_R, 1,
       [Define to 1 if you have a working localtime_r function.])
-    ac_cv_func_localtime_r="yes"
+    curl_cv_func_localtime_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_localtime_r="no"
+    curl_cv_func_localtime_r="no"
   fi
 ])
 
@@ -4712,10 +4712,10 @@ AC_DEFUN([CURL_CHECK_FUNC_MEMRCHR], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_MEMRCHR, 1,
       [Define to 1 if you have the memrchr function or macro.])
-    ac_cv_func_memrchr="yes"
+    curl_cv_func_memrchr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_memrchr="no"
+    curl_cv_func_memrchr="no"
   fi
 ])
 
@@ -4841,10 +4841,10 @@ AC_DEFUN([CURL_CHECK_FUNC_POLL], [
       [Define to 1 if you have a working poll function.])
     AC_DEFINE_UNQUOTED(HAVE_POLL_FINE, 1,
       [If you have a fine poll])
-    ac_cv_func_poll="yes"
+    curl_cv_func_poll="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_poll="no"
+    curl_cv_func_poll="no"
   fi
 ])
 
@@ -4963,10 +4963,10 @@ AC_DEFUN([CURL_CHECK_FUNC_REMOVEXATTR], [
       AC_DEFINE(HAVE_REMOVEXATTR_3, 1, [removexattr() takes 3 args])
     fi
     #
-    ac_cv_func_removexattr="yes"
+    curl_cv_func_removexattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_removexattr="no"
+    curl_cv_func_removexattr="no"
   fi
 ])
 
@@ -5236,10 +5236,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SETXATTR], [
       AC_DEFINE(HAVE_SETXATTR_6, 1, [setxattr() takes 6 args])
     fi
     #
-    ac_cv_func_setxattr="yes"
+    curl_cv_func_setxattr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_setxattr="no"
+    curl_cv_func_setxattr="no"
   fi
 ])
 
@@ -5321,10 +5321,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SIGACTION], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_SIGACTION, 1,
       [Define to 1 if you have the sigaction function.])
-    ac_cv_func_sigaction="yes"
+    curl_cv_func_sigaction="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_sigaction="no"
+    curl_cv_func_sigaction="no"
   fi
 ])
 
@@ -5406,10 +5406,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SIGINTERRUPT], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_SIGINTERRUPT, 1,
       [Define to 1 if you have the siginterrupt function.])
-    ac_cv_func_siginterrupt="yes"
+    curl_cv_func_siginterrupt="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_siginterrupt="no"
+    curl_cv_func_siginterrupt="no"
   fi
 ])
 
@@ -5491,10 +5491,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SIGNAL], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_SIGNAL, 1,
       [Define to 1 if you have the signal function.])
-    ac_cv_func_signal="yes"
+    curl_cv_func_signal="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_signal="no"
+    curl_cv_func_signal="no"
   fi
 ])
 
@@ -5598,10 +5598,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SIGSETJMP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_SIGSETJMP, 1,
       [Define to 1 if you have the sigsetjmp function or macro.])
-    ac_cv_func_sigsetjmp="yes"
+    curl_cv_func_sigsetjmp="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_sigsetjmp="no"
+    curl_cv_func_sigsetjmp="no"
   fi
 ])
 
@@ -5696,10 +5696,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SOCKET], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_SOCKET, 1,
       [Define to 1 if you have the socket function.])
-    ac_cv_func_socket="yes"
+    curl_cv_func_socket="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_socket="no"
+    curl_cv_func_socket="no"
   fi
 ])
 
@@ -5785,10 +5785,10 @@ AC_DEFUN([CURL_CHECK_FUNC_SOCKETPAIR], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_SOCKETPAIR, 1,
       [Define to 1 if you have the socketpair function.])
-    ac_cv_func_socketpair="yes"
+    curl_cv_func_socketpair="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_socketpair="no"
+    curl_cv_func_socketpair="no"
   fi
 ])
 
@@ -5870,10 +5870,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRCASECMP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRCASECMP, 1,
       [Define to 1 if you have the strcasecmp function.])
-    ac_cv_func_strcasecmp="yes"
+    curl_cv_func_strcasecmp="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strcasecmp="no"
+    curl_cv_func_strcasecmp="no"
   fi
 ])
 
@@ -5954,10 +5954,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRCMPI], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRCMPI, 1,
       [Define to 1 if you have the strcmpi function.])
-    ac_cv_func_strcmpi="yes"
+    curl_cv_func_strcmpi="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strcmpi="no"
+    curl_cv_func_strcmpi="no"
   fi
 ])
 
@@ -6039,10 +6039,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRDUP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRDUP, 1,
       [Define to 1 if you have the strdup function.])
-    ac_cv_func_strdup="yes"
+    curl_cv_func_strdup="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strdup="no"
+    curl_cv_func_strdup="no"
   fi
 ])
 
@@ -6298,10 +6298,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRERROR_R], [
       AC_DEFINE_UNQUOTED(STRERROR_R_TYPE_ARG3, $tst_posix_strerror_r_type_arg3,
         [Define to the type of arg 3 for strerror_r.])
     fi
-    ac_cv_func_strerror_r="yes"
+    curl_cv_func_strerror_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strerror_r="no"
+    curl_cv_func_strerror_r="no"
   fi
   #
   if test "$tst_compi_strerror_r" = "yes" &&
@@ -6389,10 +6389,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRICMP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRICMP, 1,
       [Define to 1 if you have the stricmp function.])
-    ac_cv_func_stricmp="yes"
+    curl_cv_func_stricmp="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_stricmp="no"
+    curl_cv_func_stricmp="no"
   fi
 ])
 
@@ -6473,10 +6473,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRNCASECMP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRNCASECMP, 1,
       [Define to 1 if you have the strncasecmp function.])
-    ac_cv_func_strncasecmp="yes"
+    curl_cv_func_strncasecmp="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strncasecmp="no"
+    curl_cv_func_strncasecmp="no"
   fi
 ])
 
@@ -6558,10 +6558,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRNCMPI], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRNCMPI, 1,
       [Define to 1 if you have the strncmpi function.])
-    ac_cv_func_strncmpi="yes"
+    curl_cv_func_strncmpi="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strncmpi="no"
+    curl_cv_func_strncmpi="no"
   fi
 ])
 
@@ -6643,10 +6643,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRNICMP], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRNICMP, 1,
       [Define to 1 if you have the strnicmp function.])
-    ac_cv_func_strnicmp="yes"
+    curl_cv_func_strnicmp="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strnicmp="no"
+    curl_cv_func_strnicmp="no"
   fi
 ])
 
@@ -6728,10 +6728,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRSTR], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRSTR, 1,
       [Define to 1 if you have the strstr function.])
-    ac_cv_func_strstr="yes"
+    curl_cv_func_strstr="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strstr="no"
+    curl_cv_func_strstr="no"
   fi
 ])
 
@@ -6813,10 +6813,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRTOK_R], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRTOK_R, 1,
       [Define to 1 if you have the strtok_r function.])
-    ac_cv_func_strtok_r="yes"
+    curl_cv_func_strtok_r="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strtok_r="no"
+    curl_cv_func_strtok_r="no"
   fi
 ])
 
@@ -6898,10 +6898,10 @@ AC_DEFUN([CURL_CHECK_FUNC_STRTOLL], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_STRTOLL, 1,
       [Define to 1 if you have the strtoll function.])
-    ac_cv_func_strtoll="yes"
+    curl_cv_func_strtoll="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_strtoll="no"
+    curl_cv_func_strtoll="no"
   fi
 ])
 
@@ -6983,9 +6983,9 @@ AC_DEFUN([CURL_CHECK_FUNC_WRITEV], [
     AC_MSG_RESULT([yes])
     AC_DEFINE_UNQUOTED(HAVE_WRITEV, 1,
       [Define to 1 if you have the writev function.])
-    ac_cv_func_writev="yes"
+    curl_cv_func_writev="yes"
   else
     AC_MSG_RESULT([no])
-    ac_cv_func_writev="no"
+    curl_cv_func_writev="no"
   fi
 ])