`./configure CFLAGS=-w` causes configure script to wrongly guess style of
`gethostbyname_r` on OS X (and probably other BSDs)
-----------------------------------------------------------------------------------------------------------------------------
Key: TS-1091
URL: https://issues.apache.org/jira/browse/TS-1091
Project: Traffic Server
Issue Type: Bug
Components: Build
Affects Versions: 3.0.2
Environment: OS X 10.6.8
Reporter: Marc Abramowitz
Priority: Minor
Arguably, people should never run configure with CFLAGS=-w and this might seem
stupid and something that should never happen, but it turns out that Homebrew
(http://mxcl.github.com/homebrew/) does this by default -- I discovered this
while writing a Homebrew formula for Traffic Server
(https://github.com/mxcl/homebrew/pull/9513). After discovering that this was
causing problems, I modified my formula to tell Homebrew not to do this and all
is well, but I thought it would be interesting to make Traffic Server resistant
to this as well.
I first tried to enable warnings by trying to find a gcc #pragma that could go
in the conftest.c code, but I could not find any #pragma that seemed to do this.
I ended up making a small change to `build/common.m4` that strips -w out of
CFLAGS using `sed`.
{code}
--- build/common.m4.2012-01-22-092051 2011-05-25 13:19:54.000000000 -0700
+++ build/common.m4 2012-01-22 22:48:14.000000000 -0800
@@ -177,6 +177,7 @@
if test "$ac_cv_prog_gcc" = "yes"; then
CFLAGS="$CFLAGS -Werror"
fi
+ CFLAGS=$(echo $CFLAGS | sed -e 's/^-w$//' -e 's/^-w //' -e 's/ -w$//' -e 's/
-w / /')
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
[#include "confdefs.h"
]
{code}
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