--- groff-1.15.orig/include/lib.h
+++ groff-1.15/include/lib.h
@@ -76,6 +76,10 @@
   return c >= 0 && illegal_char_table[c];
 }
 
+#ifndef HAVE_STRCASECMP
+#  define	strcasecmp(a,b)	strcmp((a),(b))
+#endif
+
 #ifdef HAVE_CC_LIMITS_H
 #include <limits.h>
 #else /* not HAVE_CC_LIMITS_H */
--- groff-1.15.orig/grolj4/lj4.cc
+++ groff-1.15/grolj4/lj4.cc
@@ -567,11 +567,12 @@
 static
 int lookup_paper_size(const char *s)
 {
-  for (int i = 0; i < sizeof(paper_table)/sizeof(paper_table[0]); i++)
+  for (int i = 0; i < sizeof(paper_table)/sizeof(paper_table[0]); i++) {
     // FIXME Do this case-insensitively.
     // Perhaps allow unique prefix.
-    if (strcmp(s, paper_table[i].name) == 0)
+    if (strcasecmp(s, paper_table[i].name) == 0)
       return i;
+  }
   return -1;
 }
 
--- groff-1.15.orig/configure.in
+++ groff-1.15/configure.in
@@ -38,7 +38,7 @@
 LIBS="$LIBS -lc $LIBM"
 AC_REPLACE_FUNCS(fmod strtol getcwd strerror putenv)
 LIBS="$saved_libs"
-AC_CHECK_FUNCS(rename mkstemp)
+AC_CHECK_FUNCS(rename mkstemp strcasecmp)
 AC_DECL_SYS_SIGLIST
 dnl checks for compiler characteristics
 GROFF_ARRAY_DELETE