configure failed

[Jean-Paul Ampuero]

Hi,
The ./configure for a2ps failed, please help.
This is a copy of the output:


address@hidden a2ps-4.13]# ./configure --disable-nls
--without-extensions --with-medium=A4
--with-encoding=ascii

creating cache ./config.cache
checking for a BSD compatible install...
/usr/bin/install -c
checking whether build environment is sane... yes
checking for mawk... no
checking for gawk... gawk
checking whether make sets ${MAKE}... yes
checking for mawk... (cached) gawk
checking for gm4... no
checking for gnum4... no
checking for m4... no
checking whether m4 supports frozen files... no
checking for a BSD compatible install...
/usr/bin/install -c
checking whether ln -s works... yes
checking whether make sets ${MAKE}... (cached) yes
checking for perl... /usr/bin/perl
checking for gcc... gcc
checking whether the C compiler (gcc   ) works... yes
checking whether the C compiler (gcc   ) is a
cross-compiler... no
checking whether we are using GNU C... yes
checking whether gcc accepts -g... yes
checking how to run the C preprocessor... gcc -E
checking dependency style of gcc... gcc
checking for AIX... no
checking for minix/config.h... no
checking for POSIXized ISC... no
checking how to run the C preprocessor... gcc -E
checking for gcc option to accept ANSI C... none needed
checking for function prototypes... yes
checking for bison... no
checking for byacc... no
checking how to suppress newlines using echo... option
checking for flex... no
checking for lex... no
checking for flex... ${SHELL}
/usr/local/a2ps-4.13/auxdir/missing --run flex
checking for yywrap in -ll... no
checking lex output file root... ./configure:
${SHELL}: command not found
configure: error: cannot find output from ${SHELL}
/usr/local/a2ps-4.13/auxdir/missing --run flex;
giving up


Jean Paul (Pablo) AMPUERO 

Princeton University - Department of Geosciences
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