'selfupdate' fails if MacPorts' GCC installed, selected, and first in PATH

[michaelld (Michael Dickens)]

I'm compiling using the latest XCode (3.1.2) and OSX (10.5.6) for Intel-Mac, upgrading from MacPorts 1.7.0 to 1.7.1 .

When executing 'sudo port selfupdate', the script to execute configuring (defined by base/src/macports1.0/macports.tcl:1908, which is installed as /Library/Tcl/macports1.0/macports.tcl ) doesn't set the environment variable CC=/usr/bin/gcc , or take the user's setting for it -- instead relying on the first 'gcc' found in the environment PATH. If the selfupdate command is issued when one of MacPorts' GCC ports is installed and selected (via gcc_select), then 'which gcc' will be '/opt/local/bin/gcc' and that will be a symlink pointing to the MacPorts' installed GCC. 'configure' will find that version instead of Apple's, which seems to be required for proper compilation. The resulting error when not using Apple's GCC will be something along the lines of:

    while executing
"macports::selfupdate [array get global_options]"
Error: /opt/local/bin/port: port selfupdate failed: Error installing new MacPorts base:
shell command "cd /opt/local/var/macports/sources/rsync.macports.org/release/base &&
./configure --prefix=/opt/local --with-tclpackage=/Library/Tcl --with-install-user=root
--with-install-group=admin --with-directory-mode=0755 && make && make install"
returned error 2
Command output: /System/Library/Frameworks/Foundation.framework/Headers/NSURLHandle.h:80:
error: expected ';' before '__attribute__'
/System/Library/Frameworks/Foundation.framework/Headers/NSURLHandle.h:83:
error: expected ';' before '__attribute__'

[snip]

the actual error (via debug output) will be something along the lines of:

===> making all in src/tclobjc1.0
gcc -c -DUSE_TCL_STUBS -g -O2  -g -Os -DHAVE_CONFIG_H -I.. -I.  -I"/usr/include"  -DTCL_THREADS=1
-DUSE_THREAD_ALLOC=1 -D_REENTRANT=1 -D_THREAD_SAFE=1 -DHAVE_PTHREAD_ATTR_SETSTACKSIZE=1
-DHAVE_PTHREAD_ATFORK=1 -DHAVE_READDIR_R=1 -DMAC_OSX_TCL=1 -DHAVE_CFBUNDLE=1 -DUSE_VFORK=1
-DTCL_DEFAULT_ENCODING=\"utf-8\" -DHAVE_GETCWD=1 -DHAVE_OPENDIR=1 -DHAVE_STRSTR=1 -DHAVE_STRTOL=1
-DHAVE_STRTOLL=1 -DHAVE_STRTOULL=1 -DHAVE_TMPNAM=1 -DHAVE_WAITPID=1 -DNO_VALUES_H=1 -DHAVE_LIMITS_H=1
-DHAVE_UNISTD_H=1 -DHAVE_SYS_PARAM_H=1 -DHAVE_SYS_TIME_H=1 -DTIME_WITH_SYS_TIME=1 -DHAVE_TM_ZONE=1 -DHAVE_GMTIME_R=1
-DHAVE_LOCALTIME_R=1 -DHAVE_TM_GMTOFF=1 -DHAVE_TIMEZONE_VAR=1 -DHAVE_ST_BLKSIZE=1 -DSTDC_HEADERS=1 -DHAVE_SIGNED_CHAR=1
-DHAVE_LANGINFO=1 -DHAVE_SYS_IOCTL_H=1 -DHAVE_SYS_FILIO_H=1 -include tclArch.h  -UPACKAGE_NAME -UPACKAGE_TARNAME
-UPACKAGE_VERSION -UPACKAGE_STRING -UPACKAGE_BUGREPORT -fno-common tclobjc.m -o tclobjc.o
In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSAffineTransform.h:5,
                 from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:13,
                 from tclobjc.m:42:
/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:122: error: expected ';' before '__attribute__'

[snip]

[blb@…]

Dup of #19051.