Stefan Fiedler:

package/base/gcc/g++-autopch.sh

@@ -21,38 +21,50 @@
 
 
 cxx="${AUTOPCHCXX:-g++}"
-cppfile="$( echo "$*" | sed -r 's,.* ([^ ]*\.cpp).*,\1,'; )"
-cppargs="$( echo "$*" | sed -r 's, ([^- ]|-[MCSEco])[^ ]*,,g'; )"
+[ "$cxx" == "$0" ] && exit 2
 
-# echo "AutoPCH> $cxx $*" >&2
-# echo "AutoPCH - cppfile> $cppfile" >&2
-# echo "AutoPCH - cppargs> $cppargs" >&2
+cppfile="$( echo " $* " | sed -r 's,((.* )([^ ]*\.(cc|cp|cpp|CPP|cxx|c\+\+|C))) .*,\3,' )"
+cppdir="$( echo "$cppfile" | sed -r 's,[^/]*$,,'; )"
+cppargs="$( echo " $* " | sed -r 's, ([^- ]|-[MCSEco])[^ ]*,,g'; )"
 
-if [ ".$cppfile" == ".$*" ]; then
+echo "AutoPCH> $cxx $*" >&2
+echo "AutoPCH - cppargs> \"$cppargs\"" >&2
+echo "AutoPCH - cppdir, cppfile> \"$cppdir\", \"$cppfile\"" >&2
+
+if [ ! -f "$cppfile" ]; then
 	exec $cxx "$@"
 	exit 1
 fi
 
-if [ ! -f autopch.h -a ! -f autopch_oops.h ]; then
+autopch="$cppdir${cppdir:+/}autopch"
+if [ ! -f "${autopch}.h" -a ! -f "${autopch}_oops.h" ]; then
 	{
 		echo "#ifndef _AUTOPCH_H_"
 		echo "#define _AUTOPCH_H_"
 		echo "#warning AutoPCH: THEWARNING"
-		[ -f autopch_incl.h ] && cat autopch_incl.h
-		egrep -h '^#(include.*\.h[">]|if|endif|define.*[^\\]$|undef)' *.cpp | \
-			egrep -v "[<\"](${AUTOPCHEXCL:-autopch.h})[\">]"
+		[ -f "${autopch}_incl.h" ] && cat "${autopch}_incl.h"
+		sed -r '/^( |	)*#( |	)*(include|if|endif|define|undef)/ {
+			: label /\\$/ { N ; P ; b label ; } ; p
+		} ; d' "$cppdir"${cppdir:+/}*.{cc,cp,cpp,CPP,cxx,c++,C} 2&>1
+# \
+#		| egrep -v "[<\"](${AUTOPCHEXCL:-autopch.h})[\">]"
 		echo "#endif /* _AUTOPCH_H_ */"
-	} > autopch.h.plain
-	sed 's,THEWARNING,New pre-compiled header.,' < autopch.h.plain > autopch.h
-	echo "exec $cxx -I. $cppargs -x c++ -c autopch.h" > autopch.sh
-	if ! sh autopch.sh; then mv -f autopch.h autopch_oops.h; fi
-	sed 's,THEWARNING,Pre-compiled header not used!,' < autopch.h.plain > autopch.h
+	} > "${autopch}.h.plain"
+	sed 's,THEWARNING,New pre-compiled header.,' \
+		< "${autopch}.h.plain" > "${autopch}.h"
+	# Precompile the autopch.h file
+	echo "exec $cxx -I. $cppargs -x c++ -c \"${autopch}.h\"" \
+		> "${autopch}.sh"
+	if ! sh "${autopch}.sh" ; then
+		mv -f "${autopch}.h" "${autopch}_oops.h"
+	fi
+	sed 's,THEWARNING,Pre-compiled header not used!,' \
+		< "${autopch}.h.plain" > "${autopch}.h"
 fi
 
-if ! test -f autopch.h || ! $cxx -include autopch.h "$@"; then
+if test -f ${autopch}.h && ! $cxx -include ${autopch}.h "$@"; then
 	echo "AutoPCH: Fallback to non pre-compiled headers!" >&2
 	exec $cxx "$@"
 	exit 1
 fi
 exit 0
-