Clean up comments, and update information on file locking.

[nmh] / configure.ac

diff --git a/configure.ac b/configure.ac
index 059bff8f56724cb41fad03894e8dfb6996aa5652..520c8d42dbdcb44850feaeac9b2a5bd38dd18fde 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -106,12 +106,6 @@ AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
  AC_TRY_COMPILE([],[],nmh_cv_has_wextra=yes,nmh_cv_has_wextra=no)
  CFLAGS="$nmh_saved_cflags"])
 
-AC_CACHE_CHECK([whether compiler supports -Wno-clobbered], [nmh_cv_has_noclobbered],
-[nmh_saved_cflags="$CFLAGS"
- CFLAGS="$CFLAGS -Wno-clobbered -Werror"
- AC_TRY_COMPILE([],[],nmh_cv_has_noclobbered=yes,nmh_cv_has_noclobbered=no)
- CFLAGS="$nmh_saved_cflags"])
-
 dnl Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
 dnl setup version 2.763, because it disables some features in the
 dnl system system header files and warns about them with -Wall.  Try
@@ -127,6 +121,20 @@ if test "$GCC" = yes; then
        [nmh_cv_has_dash_ansi=no])
      CPPFLAGS="$nmh_saved_cppflags"
      CFLAGS="$nmh_saved_cflags"])
+
+  dnl Disable clang complaint about unused -ansi when linking.
+  AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
+                 [nmh_cv_has_q_unused_arguments],
+    [nmh_saved_ldflags="$LDFLAGS"
+     LDFLAGS="$LDFLAGS -Qunused-arguments"
+     AC_TRY_LINK([],[],nmh_cv_has_q_unused_arguments=yes,
+                 nmh_cv_has_q_unused_arguments=no)
+     LDFLAGS="$nmh_saved_ldflags"])
+
+  if test "$nmh_cv_has_q_unused_arguments" = "yes"; then
+    test -z "$LDFLAGS" && LDFLAGS=-Qunused-arguments \
+                       || LDFLAGS="$LDFLAGS -Qunused-arguments"
+  fi
 else
   nmh_cv_has_dash_ansi=no
 fi
@@ -147,9 +155,6 @@ fi
 if test "$nmh_cv_has_wextra" = "yes"; then
     nmh_gcc_warnflags="${nmh_gcc_warnflags} -Wextra"
 fi
-if test "$nmh_cv_has_noclobbered" = "yes"; then
-    nmh_gcc_warnflags="${nmh_gcc_warnflags} -Wno-clobbered"
-fi
 
 if test -n "$auto_cflags"; then
   if test x"$enable_debug" = x"yes"; then
@@ -238,13 +243,13 @@ AS_IF([test "$lspath" != "no"],
     nmh_cv_ls_grpopt="-lg"])])])
 
 dnl Look for `sendmail'
-pathtmp=/usr/lib:/usr/sbin:/usr/etc:/usr/ucblib:/usr/bin:/bin
+pathtmp=/usr/sbin:/usr/lib:/usr/etc:/usr/ucblib:/usr/bin:/bin
 AC_PATH_PROG([sendmailpath], [sendmail], [/usr/sbin/sendmail], [$pathtmp])
 
 dnl Cygwin FAT filesystems do not support hard links.  So default to
 dnl cp instead, even if running on an NTFS or other filesystem.
 AS_CASE(["$host_os"],
-  [cygwin*],[LN=cp],
+  [cygwin*], [LN=cp],
   [LN=ln])
 AC_SUBST([LN])
 
@@ -565,6 +570,20 @@ dnl Now put the libraries back to what it was before we
 dnl starting checking the termcap library.
 LIBS="$nmh_save_LIBS"
 
+dnl ----------------
+dnl CHECK FLEX FIXUP
+dnl ----------------
+dnl Use LFLAGS make variable setting to work around bugs in flex
+dnl 2.5.35-37 that cause signed/unsigned mismatch,
+dnl http://sourceforge.net/p/flex/bugs/140/
+AS_IF([test "$LEX" = flex],
+      [AS_CASE([`$LEX -V`],
+               [flex\ 2.5.35], [[LFLAGS=\
+'; printf "%s\n" '\''1,$$s/(size_t) \(num_to_read\)/\1/'\'' w q | ed -s $@']],
+               [flex\ 2.5.3@<:@67@:>@], [[LFLAGS=\
+'; printf "%s\n" '\''1,$$s/\(  \)int i;/\1yy_size_t i;/'\'' w q | ed -s $@']])
+       AC_SUBST([LFLAGS])])
+
 dnl --------------
 dnl CHECK TYPEDEFS
 dnl --------------