From d2232db790ebad0dbff649336b647e17ab83c71f Mon Sep 17 00:00:00 2001
From: Quincey Koziol <koziol@hdfgroup.org>
Date: Sun, 1 Apr 2012 15:43:59 -0500
Subject: [svn-r22223] Description:     Update GCC compiler flags for new 4.7.0
 release.

Tested on:
    Mac OSX/64 10.7.3 (amazon) w/gcc 4.7.0
---
 config/gnu-flags | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

diff --git a/config/gnu-flags b/config/gnu-flags
index 38ea4e4..40aa1da 100644
--- a/config/gnu-flags
+++ b/config/gnu-flags
@@ -186,10 +186,84 @@ esac
 # the information from the previous version and adding modifications to that.
 case "$cc_vendor-$cc_version" in
 
+# Closer to the gcc 4.8 release, we should check for additional flags to
+# include and break it out into it's own section, like the other versions
+# below. -QAK
+  gcc-4.[78]*)
+    # Replace -ansi flag with -std=c99 flag
+    H5_CFLAGS="`echo $H5_CFLAGS | sed -e 's/-ansi/-std=c99/g'`"
+
+    # Append warning flags
+    # Don't use the '-Wtraditional' flag, we're way past having K&R C code
+    # H5_CFLAGS="$H5_CFLAGS -Wtraditional"
+    # Don't use the '-Wtraditional-conversion' flag, there's too many warnings
+    #  from GCC's assert macro
+    # H5_CFLAGS="$H5_CFLAGS -Wtraditional-conversion"
+
+    # Append warning flags from gcc-3* case
+    # (don't use -Wpadded flag for normal builds, many of the warnings its
+    #   issuing can't be fixed and they are making it hard to detect other,
+    #   more important warnings)
+    #H5_CFLAGS="$H5_CFLAGS -Wfloat-equal -Wmissing-format-attribute -Wpadded"
+    H5_CFLAGS="$H5_CFLAGS -Wfloat-equal -Wmissing-format-attribute"
+
+    # Append warning flags from gcc-3.2* case
+    H5_CFLAGS="$H5_CFLAGS -Wmissing-noreturn -Wpacked -Wdisabled-optimization"
+
+    # Enable more format checking flags, beyond the basic -Wformat included
+    # in -Wall
+    H5_CFLAGS="$H5_CFLAGS -Wformat=2"
+
+    # The "unreachable code" warning appears to be reliable now...
+    # (this warning was removed in gcc 4.5+)
+    #H5_CFLAGS="$H5_CFLAGS -Wunreachable-code"
+
+    # Append warning flags from gcc-3.3* case
+    H5_CFLAGS="$H5_CFLAGS -Wendif-labels"
+
+    # Append warning flags from gcc-3.4* case
+    H5_CFLAGS="$H5_CFLAGS -Wdeclaration-after-statement -Wold-style-definition -Winvalid-pch"
+
+    # Replace old -W flag with new -Wextra flag
+    H5_CFLAGS="`echo $H5_CFLAGS | sed -e 's/-W\ /-Wextra\ /g'`"
+
+    # Append more extra warning flags that only gcc4.0+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wvariadic-macros -Winit-self -Wmissing-include-dirs -Wswitch-default -Wswitch-enum -Wunused-macros"
+
+    # Append more extra warning flags that only gcc 4.1+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wunsafe-loop-optimizations -Wc++-compat"
+
+    # Append more extra warning flags that only gcc 4.2+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wstrict-overflow"
+
+    # Append more extra warning flags that only gcc 4.3+ know about
+    #
+    # Technically, variable-length arrays are part of the C99 standard, but
+    #   we should approach them a bit cautiously... -QAK
+    H5_CFLAGS="$H5_CFLAGS -Wlogical-op -Wlarger-than=2048 -Wvla"
+
+    # Append more extra warning flags that only gcc 4.4+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wsync-nand -Wframe-larger-than=16384 -Wpacked-bitfield-compat"
+
+    # Append more extra warning flags that only gcc 4.5+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wstrict-overflow=5 -Wjump-misses-init -Wunsuffixed-float-constants"
+
+    # Append more extra warning flags that only gcc 4.6+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wdouble-promotion -Wsuggest-attribute=const -Wtrampolines"
+
+    # Append more extra warning flags that only gcc 4.7+ know about
+    H5_CFLAGS="$H5_CFLAGS -Wstack-usage=8192 -Wvector-operation-performance"
+
+    # Try out the new "stack protector" feature in gcc 4.1
+    # (Strictly speaking this isn't really a "warning" flag, so it's added to
+    #   the debugging flags)
+    #DEBUG_CFLAGS="$DEBUG_CFLAGS -Wstack-protector -fstack-protector-all"
+    ;;
+
 # Closer to the gcc 4.7 release, we should check for additional flags to
 # include and break it out into it's own section, like the other versions
 # below. -QAK
-  gcc-4.[67]*)
+  gcc-4.6*)
     # Replace -ansi flag with -std=c99 flag
     H5_CFLAGS="`echo $H5_CFLAGS | sed -e 's/-ansi/-std=c99/g'`"
 
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