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58 lines
1.6 KiB
58 lines
1.6 KiB
#!/bin/bash
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#
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# AutoPCH: Automatically use pre-compiled headers
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#
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# Simply use this script instead of calling g++ directly.
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# This is a dirty hack. So don't wonder if it does not work
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# out of the box with every package.
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#
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# example using kdegames:
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# -----------------------
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#
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# time make CXX="autopch"
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# real 30m41.945s
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# user 25m30.924s
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# sys 3m9.300s
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#
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# without autopch:
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# real 42m59.061s
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# user 36m50.630s
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# sys 2m41.806s
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cxx="${AUTOPCHCXX:-g++}"
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cppfile="$( echo "$*" | sed -r 's,.* ([^ ]*\.cpp).*,\1,'; )"
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cppargs="$( echo "$*" | sed -r 's, ([^- ]|-[MCSEco])[^ ]*,,g'; )"
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# echo "AutoPCH> $cxx $*" >&2
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# echo "AutoPCH - cppfile> $cppfile" >&2
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# echo "AutoPCH - cppargs> $cppargs" >&2
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if [ ".$cppfile" == ".$*" ]; then
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exec $cxx "$@"
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exit 1
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fi
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if [ ! -f autopch.h -a ! -f autopch_oops.h ]; then
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{
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echo "#ifndef _AUTOPCH_H_"
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echo "#define _AUTOPCH_H_"
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echo "#warning AutoPCH: THEWARNING"
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[ -f autopch_incl.h ] && cat autopch_incl.h
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egrep -h '^#(include.*\.h[">]|if|endif|define.*[^\\]$|undef)' *.cpp | \
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egrep -v "[<\"](${AUTOPCHEXCL:-autopch.h})[\">]"
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echo "#endif /* _AUTOPCH_H_ */"
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} > autopch.h.plain
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sed 's,THEWARNING,New pre-compiled header.,' < autopch.h.plain > autopch.h
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echo "exec $cxx -I. $cppargs -x c++ -c autopch.h" > autopch.sh
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if ! sh autopch.sh; then mv -f autopch.h autopch_oops.h; fi
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sed 's,THEWARNING,Pre-compiled header not used!,' < autopch.h.plain > autopch.h
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fi
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if ! test -f autopch.h || ! $cxx -include autopch.h "$@"; then
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echo "AutoPCH: Fallback to non pre-compiled headers!" >&2
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exec $cxx "$@"
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exit 1
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fi
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exit 0
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