manywarnings update

[Simon Josefsson]

I have pushed the patch below.  For Libtasn1, the only new warning flag
I had to manually disable for that project was -Wsuggest-attribute=pure
because there were many hits and I didn't feel like adding many function
attributes.  Unfortunately, several of the parameters aren't documented
in the manual so it is unclear whether they are implied by -Wall or not.

/Simon

>From 3e07d5d60bee7d0e6fc0d79e974ce5a8dc7dea61 Mon Sep 17 00:00:00 2001
From: Simon Josefsson <address@hidden>
Date: Sun, 20 Nov 2011 23:08:31 +0100
Subject: [PATCH] manywarnings: More warnings.

* m4/manywarnings.m4: Add more warnings from gcc 4.6.2.
---
 ChangeLog          |    4 ++++
 m4/manywarnings.m4 |   27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index e447786..8173a2e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-11-20  Simon Josefsson  <address@hidden>
+
+       * m4/manywarnings.m4: Add more warnings from gcc 4.6.2.
+
 2011-11-20  Bruno Haible  <address@hidden>
 
        fma tests: Avoid shadowing local variables.
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index 67db064..6e78c07 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -148,6 +148,33 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     ; do
     gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
   done
+  # More warnings from gcc 4.6.2 --help=warnings.
+  for gl_manywarn_item in \
+    -Wabi \
+    -Wcpp \
+    -Wdeprecated \
+    -Wdeprecated-declarations \
+    -Wdiv-by-zero \
+    -Wdouble-promotion \
+    -Wendif-labels \
+    -Wextra \
+    -Wformat-contains-nul \
+    -Wformat-extra-args \
+    -Wformat-zero-length \
+    -Wformat=2 \
+    -Wmultichar \
+    -Wnormalized=nfc \
+    -Woverflow \
+    -Wpointer-to-int-cast \
+    -Wpragmas \
+    -Wsuggest-attribute=const \
+    -Wsuggest-attribute=noreturn \
+    -Wsuggest-attribute=pure \
+    -Wtrampolines \
+    -Wunsuffixed-float-constants \
+    ; do
+    gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
+  done
 
   # Disable the missing-field-initializers warning if needed
   if test "$gl_cv_cc_nomfi_needed" = yes; then
-- 
1.7.2.5