Index: m4/ax_cflags_no_writable_strings.m4
===================================================================
--- m4/ax_cflags_no_writable_strings.m4.orig
+++ m4/ax_cflags_no_writable_strings.m4
@@ -40,6 +40,7 @@ VAR,[VAR="no, unknown"
 for ac_arg dnl
 in "-pedantic % -fno-writable-strings -Wwrite-strings" dnl   GCC
    "-pedantic % -fconst-strings -Wwrite-strings" dnl newer  GCC
+   "-Wall     %                       -Wwrite-strings" dnl   GCC4.1+
    "-v -Xc    % -xstrconst" dnl Solaris C - strings go into readonly segment
    "+w1 -Aa   % +ESlit"      dnl HP-UX C - strings go into readonly segment
    "-w0 -std1 % -readonly_strings" dnl Digital Unix - again readonly segment
Index: zzip/Makefile.am
===================================================================
--- zzip/Makefile.am.orig
+++ zzip/Makefile.am
@@ -45,13 +45,13 @@ libzzip_la_LDFLAGS= @ZZIPLIB_LDFLAGS@ $(
 libzzip_la_LIBADD= -lz @RESOLVES@
 
 libzzipmmapped_la_SOURCES =  mmapped.c memdisk.c fetch.c
-libzzipmmapped_la_headers =  mmapped.h memdisk.h fetch.h
+libzzipmmapped_la_headers =  mmapped.h memdisk.h
 libzzipmmapped_la_LDFLAGS= @ZZIPLIB_LDFLAGS@ $(RELEASE_INFO) $(VERSION_INFO) \
                     $(THREAD_SAFE)
 libzzipmmapped_la_LIBADD= -lz @RESOLVES@
 
 libzzipfseeko_la_SOURCES = fseeko.c fetch.c
-libzzipfseeko_la_headers = fseeko.h fetch.h
+libzzipfseeko_la_headers = fseeko.h 
 libzzipfseeko_la_LDFLAGS= @ZZIPLIB_LDFLAGS@ $(RELEASE_INFO) $(VERSION_INFO) \
                     $(THREAD_SAFE)
 libzzipfseeko_la_LIBADD= -lz @RESOLVES@