From e7050f97c49a451671165b6e63f926072d5d118b Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Thu, 19 Feb 2004 09:01:13 +0000
Subject: [PATCH] If --enable-debug is used and gcc, we figure out which
version and then we use as aggressive warning options as possible for the
used compiler version.
---
configure.ac | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
diff --git a/configure.ac b/configure.ac
index 866372f722..faca05c8e7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1176,10 +1176,31 @@ AC_HELP_STRING([--disable-debug],[Disable debug options]),
CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
CFLAGS="$CFLAGS -g"
if test "$GCC" = "yes"; then
- CFLAGS="$CFLAGS -W -Wall -Wwrite-strings -pedantic -Wno-long-long -Wno-format-nonliteral -Wundef -Wpointer-arith -Wnested-externs"
- dnl here's a more aggressive set to use:
- dnl CFLAGS="$CFLAGS -W -Wall -Wwrite-strings -pedantic -Wno-long-long -Wundef -Wpointer-arith -Wnested-externs -Wcast-align -Winline -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wshadow -Wfloat-equal -Wsign-compare -Wunreachable-code"
+ dnl figure out gcc version!
+ AC_MSG_CHECKING([gcc version])
+ gccver=`$CC -dumpversion`
+ num1=`echo $gccver | cut -d . -f1`
+ num2=`echo $gccver | cut -d . -f2`
+ gccnum=`(expr $num1 "*" 100 + $num2) 2>/dev/null`
+ AC_MSG_RESULT($gccver)
+
+ dnl here's the standard setup
+ WARN="-W -Wall -Wwrite-strings -pedantic -Wno-long-long -Wno-format-nonliteral -Wundef -Wpointer-arith -Wnested-externs -Wcast-align -Winline -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -Wsign-compare"
+ if test "$gccnum" -ge "296"; then
+ dnl gcc 2.96 or later
+ WARN="$WARN -Wfloat-equal"
+
+ dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
+ dnl on i686-Linux as it gives us heaps with false positives
+ if test "$gccnum" -ge "303"; then
+ dnl gcc 3.3 and later
+ WARN="$WARN -Wendif-labels"
+ fi
+
+ fi
+
+ CFLAGS="$CFLAGS $WARN"
fi
dnl strip off optimizer flags
NEWFLAGS=""
--
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