[issue3381] `./configure --enable-framework --enable-universalsdk` fails because of change in r63997

[Trent Mick]

New submission from Trent Mick <trentm at gmail.com>:

Configuring with "--enable-universalsdk" fails on Mac OS X 10.4/x86
because of a change in r63997. This in the python trunk (i.e. the 2.6 tree).

The failure looks like this:

----------------------------
$ ./configure --enable-framework --enable-universalsdk
...
checking for log1p... no
checking wchar.h usability... yes
checking wchar.h presence... yes
checking for wchar.h... yes
checking for wchar_t... yes
checking size of wchar_t... configure: error: cannot compute sizeof
(wchar_t)
See `config.log' for more details.
----------------------------

And the appropriate details in config.log are:
----------------------------
...
configure:21540: checking size of wchar_t
configure:21875: gcc -o conftest -arch ppc -arch i386 -isysroot
/Developer/SDKs/MacOSX10.4u.sdk -g -O2  -arch ppc -arch i386 -isysroot
/Developer/SDKs/MacOSX10.4u.sdk  conftest.c  >&5
/usr/bin/ld: -syslibroot: multiply specified
collect2: ld returned 1 exit status
/usr/bin/ld: -syslibroot: multiply specified
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//cctmsJ7u.out (No such file or
directory)
configure:21878: $? = 1
configure: program exited with status 1
configure: failed program was:
...
----------------------------

The command being run:

  gcc -o conftest -arch ppc -arch i386 -isysroot
/Developer/SDKs/MacOSX10.4u.sdk -g -O2  -arch ppc -arch i386 -isysroot
/Developer/SDKs/MacOSX10.4u.sdk  conftest.c

is "$ac_link". Here is a dump of relevant variables at that point in
"configure":

------------------
LDFLAGS is "-arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk "
CFLAGS is "-arch ppc -arch i386 -isysroot
/Developer/SDKs/MacOSX10.4u.sdk -g -O2"
CPPFLAGS is ""
CC is "gcc"
ac_link is "$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS
conftest.$ac_ext $LIBS >&5"
------------------

The problem is that r63997
(http://mail.python.org/pipermail/python-checkins/2008-June/070612.html)
added this line to "configure.in" for Mac OS X:

    CFLAGS="${UNIVERSAL_ARCH_FLAGS} -isysroot ${UNIVERSALSDK} ${CFLAGS}"


That results in the failure above: "ld" complaining about
-isysroot/-syslibroot being specified twice on the command line.

Ronald,
What was the "build issue on OSX 10.4" that the was meant to be fixed.
Can it be fixed without that "configure" change to "CFLAGS"?

----------
components: Build
messages: 69805
nosy: ronaldoussoren, trentm
severity: normal
status: open
title: `./configure --enable-framework --enable-universalsdk`  fails because of change in r63997
versions: Python 2.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3381>
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