syntax-check: keep one maint.mk rule in sync with its header

* Makefile (sc_check_sym_list): Add a rule to prevent a repeat
of the bug Eric has just fixed, with today's commit 25e4c2ec.
I prefer to avoid temporary files here, so use <(...), but that
is not supported by /bin/sh, so...
(SHELL): Define to /bin/bash.

1 files changed, 13 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 5dda3b5593..0da864c6ac 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,9 @@
 # This Makefile requires the use of GNU make.  Some targets require
 # that you have tools like git, makeinfo and cppi installed.
 
+# Required for the use of <(...) below.
+SHELL=/bin/bash
+
 # Produce some files that are not stored in the repository.
 all:
 
@@ -95,6 +98,16 @@ sc_cpp_indent_check:
           | grep -v '/getloadavg\.c$$' \
           | xargs cppi -c
 
+# Ensure that the list of symbols checked for by the
+# sc_prohibit_intprops_without_use rule match those in the actual file.
+# Extract the symbols from the .h file and compare with the list of
+# symbols extracted from the rule in maint.mk.
+sc_check_sym_list:
+	i=lib/intprops.h; \
+	diff -u <(perl -lne '/^# *define ([A-Z]\w+)\(/ and print $$1' $$i|fmt) \
+	  <(sed -n /^_intprops_name/,/^_intprops_syms_re/p top/maint.mk \
+            |sed '/^_/d;s/^  //;s/	*\\$$//')
+
 # Regenerate some files that are stored in the repository.
 regen: MODULES.html