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- #!/bin/sh -x
- #flex dot.l
- flex -Sflex.skl dot.l
- #flex dphl.l
- flex -Sflex.skl dphl.l
- echo "generating lexers"
- # -d == add debug code
- # -8 == generate 8 bits scanner
- # -f == fast large scanner
- # -R == reentrant lexer for threaded parsing
- # --tables-file=vcg.tables.c generates binary table data
- flex -Sflex.skl -d -8 -f --yylineno --prefix=vcg --outfile=vcg.flex.c vcg.l
- echo "flex 2.6.4 on debian 11 works"
- echo "flex 2.6.4 on fedora 34 crashes"
- # special skeleton to write only the dfa table data
- # after manual edit it is usable for own yylex() routine
- # flex -Sflextables.skl -d -8 -f --yylineno --prefix=vcg --outfile=vcg.flextables.c vcg.l
- flex --version
- bison --version
- #
- diff -p flex.skl flex-2.6.4.skl >flex-skl-diff.txt
- echo "debian 11 has flex 2.6.4"
- echo "debian 10 has flex 2.6.4"
- echo "fedora 34 has flex version 2.6.4"
- # Using own customized skeleton for the lexer code:
- # flex -S myflex.skl -o mylexer.c mylexer.l
- # Generate the myflex.skl from the development repo with:
- # sed 's/m4_/m4postproc_/g; s/m4preproc_/m4_/g' flex.skl | m4 -P -DFLEX_MAJOR_VERSION=2 -DFLEX_MINOR_VERSION=5 -DFLEX_SUBMINOR_VERSION=33 | sed 's/m4postproc_/m4_/g' > myflex.skl
- # Then edit the myflex.skl and test with needed fixes
- # sed 's/m4_/m4postproc_/g; s/m4preproc_/m4_/g' flex-2.4.6.skl | m4 -P -DFLEX_MAJOR_VERSION=2 -DFLEX_MINOR_VERSION=4 -DFLEX_SUBMINOR_VERSION=6 | sed 's/m4postproc_/m4_/g' > myflex.skl
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