52 lines
1 KiB
Text
52 lines
1 KiB
Text
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#!/bin/sh
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# Return a full cpp specification, complete with system dependent flags.
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#
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# Syntax: cppmagic [ program-to-generate-flags [ guessed-cpp ]]
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#
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# If only one arg is present it is the name of a program to invoke
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# which should generate -Dfoo defines.
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#
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# If two args are present the second arg is the name of the C
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# preprocessor to use.
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#
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# Invoked with no args, provides a C preprocessor name and
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# -traditional flag if that is appropriate.
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#
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# ../Makefile calls this file thusly: "cppmagic getcppsyms".
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#
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# Typical output:
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#
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# /lib/cpp -Dunix -Dm68k
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#
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Cpp=
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if [ "$2" ]; then
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Cpp=$2
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else
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for cpp in /lib/cpp /usr/lib/cpp /usr/ccs/lib/cpp; do
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if [ -f $cpp ]; then
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Cpp=$cpp
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fi
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done
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if [ "$Cpp" = "" ]; then
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Cpp=cpp
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fi
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fi
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TRADITIONAL=
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FLAGS=
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# First flag might be `-traditional' if this is Gnu Cpp.
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unknown_flag=`$Cpp -traditional /dev/null 2>&1 |
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egrep 'known|recognized|valid|bad|legal'`
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if [ "$unknown_flag" = "" ]; then
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TRADITIONAL=-traditional
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fi
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if [ "$1" ]; then
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FLAGS=`$1`
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fi
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echo $Cpp $TRADITIONAL $FLAGS
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