diff -Naur netpbm-10.61.02.orig/converter/pbm/cmuwmtopbm.c netpbm-10.61.02/converter/pbm/cmuwmtopbm.c

--- netpbm-10.61.02.orig/converter/pbm/cmuwmtopbm.c	2014-04-14 16:25:31.000000000 +0200

+++ netpbm-10.61.02/converter/pbm/cmuwmtopbm.c	2014-04-14 17:05:23.049000000 +0200

@@ -48,20 +48,20 @@

     rc = pm_readbiglong(ifP, &l);

     if (rc == -1 )

-        pm_error(initReadError);

+        pm_error("%s", initReadError);

     if ((uint32_t)l != cmuwmMagic)

         pm_error("bad magic number in CMU window manager file");

     rc = pm_readbiglong(ifP, &l);

     if (rc == -1)

-        pm_error(initReadError);

+        pm_error("%s", initReadError);

     *colsP = l;

     rc = pm_readbiglong(ifP, &l);

     if (rc == -1 )

-        pm_error(initReadError);

+        pm_error("%s", initReadError);

     *rowsP = l;

     rc = pm_readbigshort(ifP, &s);

     if (rc == -1)

-        pm_error(initReadError);

+        pm_error("%s", initReadError);

     *depthP = s;

 }

diff -Naur netpbm-10.61.02.orig/converter/other/tifftopnm.c netpbm-10.61.02/converter/other/tifftopnm.c

--- netpbm-10.61.02.orig/converter/other/tifftopnm.c	2014-04-14 17:06:26.000000000 +0200

+++ netpbm-10.61.02/converter/other/tifftopnm.c	2014-04-14 17:09:55.731000000 +0200

@@ -1459,7 +1459,7 @@

         int ok;

         ok = TIFFRGBAImageOK(tif, emsg);

         if (!ok) {

-            pm_message(emsg);

+            pm_message("%s", emsg);

             *statusP = CONV_UNABLE;

         } else {

             uint32 * raster;

@@ -1479,14 +1479,14 @@

                 ok = TIFFRGBAImageBegin(&img, tif, stopOnErrorFalse, emsg);

                 if (!ok) {

-                    pm_message(emsg);

+                    pm_message("%s", emsg);

                     *statusP = CONV_FAILED;

                 } else {

                     int ok;

                     ok = TIFFRGBAImageGet(&img, raster, cols, rows);

                     TIFFRGBAImageEnd(&img) ;

                     if (!ok) {

-                        pm_message(emsg);

+                        pm_message("%s", emsg);

                         *statusP = CONV_FAILED;

                     } else {

                         *statusP = CONV_DONE;

diff -Naur netpbm-10.61.02.orig/converter/other/fiasco/pnmtofiasco.c netpbm-10.61.02/converter/other/fiasco/pnmtofiasco.c

--- netpbm-10.61.02.orig/converter/other/fiasco/pnmtofiasco.c	2013-02-20 07:31:32.000000000 +0100

+++ netpbm-10.61.02/converter/other/fiasco/pnmtofiasco.c	2014-04-14 17:12:14.995000000 +0200

@@ -170,7 +170,7 @@

       return 0;

    else

    {

-      fprintf (stderr, fiasco_get_error_message ());

+      fprintf (stderr, "%s", fiasco_get_error_message ());

       fprintf (stderr, "\n");

       return 1;

    }

diff -Naur netpbm-10.61.02.orig/converter/other/fiasco/params.c netpbm-10.61.02/converter/other/fiasco/params.c

--- netpbm-10.61.02.orig/converter/other/fiasco/params.c	2013-02-20 07:31:32.000000000 +0100

+++ netpbm-10.61.02/converter/other/fiasco/params.c	2014-04-14 17:15:00.067000000 +0200

@@ -656,7 +656,7 @@

     fprintf (stderr, "Usage: %s [OPTION]...%s\n", progname,

              non_opt_string ? non_opt_string : " ");

     if (synopsis != NULL)

-        fprintf (stderr, synopsis);

+        fprintf (stderr, "%s", synopsis);

     fprintf (stderr, "\n\n");

     fprintf (stderr, "Mandatory or optional arguments to long options "

              "are mandatory or optional\nfor short options too. "