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Diffstat (limited to 'mcon/U/cpp_trad.U')
| -rw-r--r-- | mcon/U/cpp_trad.U | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/mcon/U/cpp_trad.U b/mcon/U/cpp_trad.U new file mode 100644 index 0000000..7b0fa85 --- /dev/null +++ b/mcon/U/cpp_trad.U @@ -0,0 +1,41 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic Licence, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic Licence; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: $Log: cpp_stuff.U,v $ +?MAKE:cpp_trad: cpp cat contains rm +?MAKE: -pick add $@ %< +?S:cpp_trad: +?S: This variable contains the program to run to get traditional C +?S: preprocessor semantics and not ISO C semantics: we want something +?S: that knows as little about C as possible to use as a more general +?S: purpose preprocessor. +?S:. +?F:!foo.c !foo.cpp +: how do we get traditional cpp semantics? +echo " " +echo "Checking to see how to get traditional cpp semantics..." >&4 +$cat >foo.c <<'EOF' +#define A(x) x +#define B(y) y +A(a)B(b) +EOF +if $cpp foo.c >foo.cpp; $contains ab foo.cpp >/dev/null 2>&1; then + echo "Plain '$cpp' works just fine." + cpp_trad="$cpp" +elif $cpp -traditional foo.c >foo.cpp; \ + $contains ab foo.cpp >/dev/null 2>&1; then + echo "We'll use '$cpp -traditional' to get proper semantics." + cpp_trad="$cpp -traditional" +else + echo "I don't know how to get traditional semantics with '$cpp'." >&4 + cpp_trad="$cpp" +fi +$rm -f foo.c foo.cpp + |