cyrus-sasl in buildroot: apparent CFLAGS mismatch on saslauthd

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the first issue I hit while trying to cross-compile cyrus-sasl within buildroot
is in the configure step.

Cyrus developers might be interested to know that buildroot, in the case of
the Cyrus packages, builds packages unpacking the source package (the released tarball in thi case), optionally patches them, then executes ./configure with
suitable environment and options, then launches make and make install.

I instructed buildroot to unpack cyrus-sasl 2.1.24rc1 and run its ./configure script with most options disabled to make things simple. It ran fine until it entered the saslauthd subdir with the following error (the full compilation log
is attached).

  $ pwd
  $ make cyrus-sasl-dirclean
  rm -Rf /home/murray/devel/buildroot/output/build/cyrus-sasl-2.1.24rc1
  $ make cyrus-sasl 2>&1 | tee cyrus-sasl.log
  configure: configuring in saslauthd
configure: running /bin/bash './configure' --prefix=/usr '--target=arm-linux' '--host=arm-linux' '--build=i686-pc-linux-gnu' '--prefix=/usr' '--exec-prefix=/usr' '--sysconfdir=/etc' '--disable-gtk-doc' '--enable-static' '--enable-shared' '--disable-dependency-tracking' '--disable-sample' '--disable-checkapop' '--enable-login' '--disable-otp' '--disable-srp' '--disable-gssapi' '--disable-cram' '--disable-anon' '--disable-digest' '--disable-ntlm' '--disable-passdss' '--without-des' '--without-openssl' 'CC=/home/murray/devel/buildroot/output/host/usr/bin/ccache /home/murray/devel/buildroot/output/host/usr/bin/arm-linux-gcc' 'CFLAGS=-Os -pipe -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64' 'CPP=/home/murray/devel/buildroot/output/host/usr/bin/arm-linux-cpp' 'LDFLAGS=' 'build_alias=i686-pc-linux-gnu' 'host_alias=arm-linux' 'target_alias=arm-linux' --cache-file=.././config.cache --srcdir=.
  configure: loading cache .././config.cache
  configure: error: `CFLAGS' has changed since the previous run:
configure: former value: -Os -pipe -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 configure: current value: -Os -pipe -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
  configure: error: changes in the environment can compromise the build
configure: error: run `make distclean' and/or `rm .././config.cache' and start over
  configure: error: /bin/bash './configure' failed for saslauthd

It is clear from the output that the "former" and "current" CFLAGS are
substantially identical, differing only in spacing.

After a quick look at the CFLAGS handling on both the buildroot and cyrus-sasl
side I gave up and, since I do not need saslauthd, I worked around with this
ugly patch:

diff -u -r cyrus-sasl-2.1.24rc1-orig/configure cyrus-sasl-2.1.24rc1/configure --- cyrus-sasl-2.1.24rc1-orig/configure 2009-05-07 16:24:25.000000000 +0200
 +++ cyrus-sasl-2.1.24rc1/configure    2011-05-02 15:10:36.793333728 +0200
 @@ -15542,8 +15542,10 @@
 -subdirs="$subdirs saslauthd"

 +if test "$with_saslauthd" != no; then
 +  subdirs="$subdirs saslauthd"

and adding --disable-saslauthd to the ./configure options within buildroot's (which contains the buildroot instructions to build cyrus-sasl).

This leaves two questions open:
- Why not adding a --disable-saslauthd option (the autoconf/automake way) thus
   allowing to build cyrus-sasl without this component?
 - How to solve the problem with the CFLAGS spacing handling, for those who
   might need saslauthd cross-compiled in buildroot?

The full compilation log is attached.


Attachment: cyrus-sasl-saslauthd-cflags-mismatch.log.gz
Description: GNU Zip compressed data

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