(my-distcheck): Compile with -Wpointer-arith

to detect this sort of problem automatically in the future.

diff --git a/Makefile.maint b/Makefile.maint
index 739ddbf..2d4da40 100644 (file)
--- a/Makefile.maint
+++ b/Makefile.maint
@@ -450,7 +450,8 @@ null_AM_MAKEFLAGS = \
 # Detect format-string/arg-list mismatches that would normally be obscured
 # by the use of _().  The --disable-nls effectively defines away that macro,
 # and building with CFLAGS='-Wformat -Werror' causes any format warning to be
-# treated as a failure.  Also, check for shadowing problems with -Wshadow.
+# treated as a failure.  Also, check for shadowing problems with -Wshadow,
+# and for pointer arithmetic problems with -Wpointer-arith.
 # These CFLAGS are pretty strict.  If you build this target, you probably
 # have to have a recent version of gcc and glibc headers.
 TMPDIR ?= /tmp
@@ -461,7 +462,7 @@ my-distcheck: $(local-check) $(release_archive_dir)/$(prev-tgz)
        GZIP=$(GZIP_ENV) $(AMTAR) -C $(t) -zxf $(distdir).tar.gz
        cd $(t)/$(distdir)                              \
          && ./configure --disable-nls                  \
-         && $(MAKE) CFLAGS='-Werror -Wall -Wformat -Wshadow' \
+         && $(MAKE) CFLAGS='-Werror -Wall -Wformat -Wshadow -Wpointer-arith' \
              AM_MAKEFLAGS='$(null_AM_MAKEFLAGS)'       \
          && $(MAKE) dvi                                \
          && $(MAKE) check                              \