| # -*-perl-*- hey - emacs - this is a perl file |
| |
| # src/tools/msvc/pgflex.pl |
| |
| # silence flex bleatings about file path style |
| $ENV{CYGWIN} = 'nodosfilewarning'; |
| |
| use strict; |
| use File::Basename; |
| |
| # assume we are in the postgres source root |
| |
| require 'src/tools/msvc/buildenv.pl' if -e 'src/tools/msvc/buildenv.pl'; |
| |
| system('flex -V > NUL'); |
| if ($? != 0) |
| { |
| print "WARNING! flex install not found, attempting to build without\n"; |
| exit 0; |
| } |
| |
| my $input = shift; |
| if ($input !~ /\.l$/) |
| { |
| print "Input must be a .l file\n"; |
| exit 1; |
| } |
| elsif (!-e $input) |
| { |
| print "Input file $input not found\n"; |
| exit 1; |
| } |
| |
| (my $output = $input) =~ s/\.l$/.c/; |
| |
| # get flex flags from make file |
| my $makefile = dirname($input) . "/Makefile"; |
| my ($mf, $make); |
| open($mf,$makefile); |
| local $/ = undef; |
| $make=<$mf>; |
| close($mf); |
| my $flexflags = ($make =~ /^\s*FLEXFLAGS\s*=\s*(\S.*)/m ? $1 : ''); |
| |
| system("flex $flexflags -o$output $input"); |
| if ($? == 0) |
| { |
| |
| # For non-reentrant scanners we need to fix up the yywrap macro definition |
| # to keep the MS compiler happy. |
| # For reentrant scanners (like the core scanner) we do not |
| # need to (and must not) change the yywrap definition. |
| my $lfile; |
| open($lfile,$input) || die "opening $input for reading: $!"; |
| my $lcode = <$lfile>; |
| close($lfile); |
| if ($lcode !~ /\%option\sreentrant/) |
| { |
| my $cfile; |
| open($cfile,$output) || die "opening $output for reading: $!"; |
| my $ccode = <$cfile>; |
| close($cfile); |
| $ccode =~ s/yywrap\(n\)/yywrap()/; |
| open($cfile,">$output") || die "opening $output for reading: $!"; |
| print $cfile $ccode; |
| close($cfile); |
| } |
| |
| exit 0; |
| |
| } |
| else |
| { |
| exit $? >> 8; |
| } |
| |