configure: LIBMETALINK_CFLAGS actually is LIBMETALINK_CPPFLAGS

configure.ac

@@ -1981,7 +1981,7 @@ if test "$curl_ssl_msg" = "$init_ssl_msg"; then
 
       CLEANLIBS="$LIBS"
       CLEANCPPFLAGS="$CPPFLAGS"
-      CLEADLDFLAGS="$LDFLAGS"
+      CLEANLDFLAGS="$LDFLAGS"
 
       LIBS="$addlib $LIBS"
       LDFLAGS="$LDFLAGS $addld"
@@ -2496,10 +2496,10 @@ if test X"$OPT_LIBMETALINK" != Xno; then
       AC_DEFINE(USE_METALINK, 1, [Define to enable metalink support])
       LIBMETALINK_LIBS=$addlib
       LIBMETALINK_LDFLAGS=$addld
-      LIBMETALINK_CFLAGS=$addcflags
+      LIBMETALINK_CPPFLAGS=$addcflags
       AC_SUBST([LIBMETALINK_LIBS])
       AC_SUBST([LIBMETALINK_LDFLAGS])
-      AC_SUBST([LIBMETALINK_CFLAGS])
+      AC_SUBST([LIBMETALINK_CPPFLAGS])
       curl_mtlnk_msg="enabled"
     fi
 

src/Makefile.am

@@ -52,7 +52,7 @@ endif
 include Makefile.inc
 
 # This might hold -Werror
-CFLAGS += @CURL_CFLAG_EXTRAS@ @LIBMETALINK_CFLAGS@
+CFLAGS += @CURL_CFLAG_EXTRAS@
 
 # Prevent LIBS from being used for all link targets
 LIBS = $(BLANK_AT_MAKETIME)
@@ -64,7 +64,9 @@ curl_LDADD = $(top_builddir)/lib/libcurl.la @LIBMETALINK_LIBS@ @ZLIB_LIBS@ @CURL
 endif
 
 curl_LDFLAGS = @LIBMETALINK_LDFLAGS@
+curl_CPPFLAGS = $(AM_CPPFLAGS) $(LIBMETALINK_CPPFLAGS)
 curl_DEPENDENCIES = $(top_builddir)/lib/libcurl.la
+
 BUILT_SOURCES = hugehelp.c
 CLEANFILES = hugehelp.c
 # Use the C locale to ensure that only ASCII characters appear in the