(sc_dd_max_sym_length): New target.

(syntax-check-rules): Add it.

diff --git a/Makefile.maint b/Makefile.maint
index efa14d1..44a93f9 100644 (file)
--- a/Makefile.maint
+++ b/Makefile.maint
@@ -70,6 +70,7 @@ syntax-check-rules = \
   sc_cast_of_x_alloc_return_value \
   sc_cast_of_alloca_return_value \
   sc_changelog \
+  sc_dd_max_sym_length \
   sc_error_exit_success \
   sc_prohibit_atoi_atof \
   sc_space_tab \
@@ -149,6 +150,21 @@ sc_changelog:
          { echo '$(ME): found unexpected prefix in a ChangeLog' 1>&2;  \
            exit 1; } || :
 
+# Ensure that dd's definition of LONGEST_SYMBOL stays in sync
+# with the strings from the two affected variables.
+dd_c = $(srcdir)/src/dd.c
+sc_dd_max_sym_length:
+       len=$$( (sed -n '/conversions\[\] =$$/,/^};/p' $(dd_c); \
+                sed -n '/flags\[\] =$$/,/^};/p' $(dd_c) )      \
+               |sed -n '/"/s/^[^"]*"\([^"]*\)".*/\1/p'         \
+              | wc --max-line-length);                         \
+       max=$$(sed -n '/^#define LONGEST_SYMBOL /s///p' $(dd_c) \
+             |tr -d '"' | wc --max-line-length);               \
+       if test "$$len" = "$$max"; then :; else                 \
+         echo 'dd.c: LONGEST_SYMBOL is not longest' 1>&2;      \
+         exit 1;                                               \
+       fi
+
 header_regexp = \
   alloca\
   |closeout\