bison 2.4.1 configure fails during forced update on 10.6.1 ("cannot find output from flex")

[etiffany@…]

After following the wiki instructions for updating ("migrating") to a new OS, attempting

sudo port -f uninstall installed and \( gawk grep gsed perl5 perl5.8 perl5.10 \)

and then

sudo port upgrade --force installed

progress stopped while running configure for bison. Performing

sudo port -v upgrade --force bison

produces a lot of output ending with this:

--->  Configuring bison
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... build-aux/install-sh -c -d
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for style of include used by make... GNU
checking for gcc... /usr/bin/gcc-4.2
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/gcc-4.2 accepts -g... yes
checking for /usr/bin/gcc-4.2 option to accept ISO C89... none needed
checking dependency style of /usr/bin/gcc-4.2... gcc3
checking for /usr/bin/gcc-4.2 option to accept ISO C99... -std=gnu99
checking for /usr/bin/gcc-4.2 -std=gnu99 option to accept ISO Standard C... (cached) -std=gnu99
checking for ranlib... ranlib
checking whether /usr/bin/gcc-4.2 -std=gnu99 and cc understand -c and -o together... yes
checking how to run the C preprocessor... /usr/bin/gcc-4.2 -std=gnu99 -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking for flex... flex
checking lex output file root... configure: error: cannot find output from flex; giving up
Error: Target org.macports.configure returned: configure failure: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_bison/work/bison-2.4.1" && ./configure --prefix=/opt/local --infodir=/opt/local/share/info --mandir=/opt/local/share/man --disable-yacc " returned error 1
Command output: checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/gcc-4.2 accepts -g... yes
checking for /usr/bin/gcc-4.2 option to accept ISO C89... none needed
checking dependency style of /usr/bin/gcc-4.2... gcc3
checking for /usr/bin/gcc-4.2 option to accept ISO C99... -std=gnu99
checking for /usr/bin/gcc-4.2 -std=gnu99 option to accept ISO Standard C... (cached) -std=gnu99
checking for ranlib... ranlib
checking whether /usr/bin/gcc-4.2 -std=gnu99 and cc understand -c and -o together... yes
checking how to run the C preprocessor... /usr/bin/gcc-4.2 -std=gnu99 -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking for flex... flex
checking lex output file root... configure: error: cannot find output from flex; giving up

Warning: the following items did not execute (for bison): org.macports.destroot org.macports.configure org.macports.build
Error: Unable to upgrade port: 1

[tobypeterson]

Please remember to use WikiFormatting

[jmroot (Joshua Root)]

Migrating in this way is no longer recommended for just such reasons.