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Text File  |  1992-06-08  |  1.0 KB  |  52 lines
  1. #!/bin/sh
  2. # Return a full cpp specification, complete with system dependent flags.
  3. #
  4. # Syntax: cppmagic [ program-to-generate-flags [ guessed-cpp ]]
  5. #
  6. # If only one arg is present it is the name of a program to invoke
  7. # which should generate -Dfoo defines.
  8. #
  9. # If two args are present the second arg is the name of the C
  10. # preprocessor to use.
  11. #
  12. # Invoked with no args, provides a C preprocessor name and
  13. # -traditional flag if that is appropriate.
  14. #
  15. #  ../Makefile calls this file thusly: "cppmagic getcppsyms".
  16. #
  17. #  Typical output:
  18. #
  19. #    /lib/cpp -Dunix -Dm68k
  20. #
  21.  
  22. Cpp=
  23.  
  24. if [ "$2" ]; then
  25.    Cpp=$2
  26. else
  27.    for cpp in /lib/cpp /usr/lib/cpp /usr/ccs/lib/cpp; do
  28.       if [ -f $cpp ]; then
  29.      Cpp=$cpp
  30.       fi
  31.    done
  32.    if [ "$Cpp" = "" ]; then
  33.       Cpp=cpp
  34.    fi
  35. fi
  36.  
  37. TRADITIONAL=
  38. FLAGS=
  39.  
  40. # First flag might be `-traditional' if this is Gnu Cpp.
  41. unknown_flag=`$Cpp -traditional /dev/null 2>&1 |
  42.           egrep 'known|recognized|valid|bad|legal'`
  43. if [ "$unknown_flag" = "" ]; then
  44.   TRADITIONAL=-traditional
  45. fi
  46.  
  47. if [ "$1" ]; then
  48.    FLAGS=`$1`
  49. fi
  50.  
  51. echo $Cpp $TRADITIONAL $FLAGS
  52.