src/gromacs/selection/regenerate_parser.sh

   1 #!/bin/bash
   2 #
   3 # This script runs Bison and/or Flex to regenerate the files as follows:
   4 #   parser.y  -> parser.cpp, parser.h
   5 #   scanner.l -> scanner.cpp, scanner_flex.h
   6 # The commands are run only if the generated files are older than the
   7 # Bison/Flex input files, or if a '-f' flag is provided.
   8
   9 # Note: You can check parser.cpp/scanner.cpp for the exact versions of
  10 # bison/flex that were used in the generation. Some OSs have older versions
  11 # of these tools installed.
  12
  13 FORCE=
  14 if [ "x$1" == "x-f" ] ; then
  15     FORCE=1
  16 fi
  17
  18 if [ "x$BISON" == "x" ] ; then
  19     BISON=bison
  20 fi
  21 if [ "x$FLEX" == "x" ] ; then
  22     FLEX=flex
  23 fi
  24
  25 # For convenience, change to the directory where the files are located
  26 # if the script is run from the root of the source tree.
  27 dirname=src/gromacs/selection
  28 if [[ -f $dirname/parser.y && -f $dirname/scanner.l ]] ; then
  29     cd $dirname
  30 fi
  31
  32 # We apply some trivial patches to the output to avoid warnings for PGI
  33 # (and maybe other) compilers
  34 [[ $FORCE || parser.y  -nt parser.cpp ]]  && \
  35     echo Generating parser.cpp and parser.h... && \
  36     $BISON -t -o parser.cpp --defines=parser.h parser.y && \
  37     patch -p0 < parser.patch && \
  38     rm -f parser.cpp.orig parser.h.orig
  39 [[ $FORCE || scanner.l -nt scanner.cpp ]] && \
  40     echo Generating scanner.cpp and scanner_flex.h... && \
  41     $FLEX -o scanner.cpp scanner.l && \
  42     patch -p0 < scanner.patch && \
  43     rm -f scanner.cpp.orig