apenwarr-redo/redoconf/compile.od

rc_include _all.rc
redo-ifchange _compile

# Subtle:
#  - un-backslashed $ expansions ($foo, $(cmd)) are
#    done *now*, while writing the script contents. 
#  - backslashed $ expansions (\$foo) are written
#    verbatim into the script, to be interpreted at
#    the time the script is run.
#
# We want to insert the variable contents into the
# script near the top, making sure they are not
# split or interpreted at that point (hence the
# $(shquote)).
#
# Further down, we want to disable wildcard expansion
# (set -f) and split on $NL (so we change $IFS),
# so we use backslash escapes but *not* quoting.

cat >$3 <<-EOF
	#!/bin/sh -e
	# Run the C/++ compiler.
	t="\$1" d="\$2" i="\$3"
	CPPFLAGS=$(shquote "$CPPFLAGS")
	OPTFLAGS=$(shquote "$OPTFLAGS")
	case \$i in
	  *.c|*.h)
	    CC=$(shquote "$CC")
	    CFLAGS=$(shquote "$CFLAGS")
	    CXXFLAGS=
	    PCH1=$(shquote "$CFLAGS_PCH")
	    PCH2=$(shquote "$CFLAGS_PCH_FPIC")
	    PCH3=$(shquote "$CFLAGS_PCH_LANG")
	    ;;
	  *)
	    CC=$(shquote "$CXX")
	    [ -n "\$CC" ] || (echo "No C++ compiler available." >&2; exit 1)
	    CFLAGS=
	    CXXFLAGS=$(shquote "$CXXFLAGS")
	    PCH1=$(shquote "$CXXFLAGS_PCH")
	    PCH2=$(shquote "$CXXFLAGS_PCH_FPIC")
	    PCH3=$(shquote "$CXXFLAGS_PCH_LANG")
	    ;;
	esac
	case \$PCH in
	  1) FLAGS_PCH=\$PCH1 ;;
	  2) FLAGS_PCH=\$PCH2 ;;
	  3) FLAGS_PCH=\$PCH3 ;;
	esac
	. ./_compile
EOF
chmod a+x "$3"
redo-stamp <$3