check cc flags viability before setting them
diff --git a/doc/Makefile.in b/doc/Makefile.in
index 740b1ea..9632bff 100644
--- a/doc/Makefile.in
+++ b/doc/Makefile.in
@@ -37,10 +37,10 @@
subdir = doc
DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/libtool.m4 \
- $(top_srcdir)/m4/ltoptions.m4 $(top_srcdir)/m4/ltsugar.m4 \
- $(top_srcdir)/m4/ltversion.m4 $(top_srcdir)/m4/lt~obsolete.m4 \
- $(top_srcdir)/configure.ac
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_check_compile_flag.m4 \
+ $(top_srcdir)/m4/libtool.m4 $(top_srcdir)/m4/ltoptions.m4 \
+ $(top_srcdir)/m4/ltsugar.m4 $(top_srcdir)/m4/ltversion.m4 \
+ $(top_srcdir)/m4/lt~obsolete.m4 $(top_srcdir)/configure.ac
am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
$(ACLOCAL_M4)
mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
@@ -114,7 +114,6 @@
done; \
reldir="$$dir2"
ACLOCAL = @ACLOCAL@
-ADD_CFLAGS = @ADD_CFLAGS@
AMTAR = @AMTAR@
AR = @AR@
AUTOCONF = @AUTOCONF@
@@ -177,6 +176,7 @@
SET_MAKE = @SET_MAKE@
SHELL = @SHELL@
STRIP = @STRIP@
+TESTSUITE_CFLAGS = @TESTSUITE_CFLAGS@
VERSION = @VERSION@
YACC = @YACC@
YFLAGS = @YFLAGS@