On 02/04/2014 05:31 AM, Dan Mashal wrote:
On Mon, Feb 3, 2014 at 8:16 PM, Michael Catanzaro <mcatanzaro@xxxxxxxxx> wrote:
On Mon, 2014-02-03 at 19:42 -0700, Orion Poplawski wrote:
I'm not sure why the default -Wall is being
dropped from that line (it is on other tests).
It's explicitly dropped on configure.ac:1265
dnl We enable -Wall later.
dnl If it's set after the warning CFLAGS in the compiler invocation, it
counteracts the -Wno... flags.
dnl This leads to warnings we don't want.
CFLAGS=`echo $CFLAGS |$sedpath 's/-Wall//'`
Second-guessing the user's choice of compiler warnings is certainly
"unconventional."
Anyway, this from the build log looks bad too; hope it's the same issue:
checking EXTERN.h usability... no
checking EXTERN.h presence... yes
configure: WARNING: EXTERN.h: present but cannot be compiled
configure: WARNING: EXTERN.h: check for missing prerequisite
headers?
configure: WARNING: EXTERN.h: see the Autoconf documentation
configure: WARNING: EXTERN.h: section "Present But Cannot Be
Compiled"
configure: WARNING: EXTERN.h: proceeding with the compiler's result
configure: WARNING: ## ------------------------------ ##
configure: WARNING: ## Report this to devel@xxxxxxxxx ##
configure: WARNING: ## ------------------------------ ##
checking for EXTERN.h... no
I haven't checked this particular case, but these kind of log messages
usually mean the configure script fails to compile a header file,
because some symbols are missing inside of the header file.
This usually means another header file is not being included during the
autoconf-check.
Typical reasons would be a missing AC_CHECK_HEADERS in configure or a
coding-bug inside of the header triggering the compiler warnings.
Check out the autoconf list's archive. There are plenty of reports on
similar issues.
Ralf
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