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#!/bin/bash
#
# dotd.sh
#
# Generate .d Makefile fragments, so we can use #include statements in source
# for dependency info. Adapted from the GNU make manual:
#
# http://www.gnu.org/software/make/manual/html_node/Automatic-Prerequisites.html
#
# We are putting this in shell, so we just have 'sed in bash'. Not an unholy
# mix of 'sed in bash in Make'.
set -o nounset
set -o pipefail
set -o errexit
# Munge gcc -MM output into .d files.
main() {
if [ ! -d _tmp ]; then mkdir _tmp; fi
local basename=$1
local dotd=$2 # .d output name
shift 2 # rest of args are gcc invocation
rm --verbose -f $dotd # in case of failure?
# Execute the gcc -MM invocation.
#
# Change
# rappor_sim.o: rappor.sim.cc
# to
# _tmp/rappor_sim.o _tmp/rappor_sim.d : rappor.sim.cc
"$@" | sed "s|\($basename\).o|_tmp/\1.o _tmp/\1.d |" > $dotd
}
main "$@"
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