errors_resolver_demo

#!/bin/bash

export CPATH LIBRARY_PATH
export CPPFLAGS
export LDFLAGS
export LDLIBS
export LD_LIBRARY_PATH

set -e

CPPFLAGS=-Wall
[ -z "$CC" ] && CC=gcc

showv() { val=$(eval "echo \$${1}"); test "$val" && echo -n "$1='$val' $2" || true; }

show_vars()
{
	showv CC
	showv CXX
	showv CXXFLAGS
	showv CPATH
	showv CPPFLAGS
	#showv LIBRARY_PATH
	showv LDFLAGS
	showv LDLIBS
}

fatal() { echo "Fatal error $1"; exit 1; }

(echo | python3) || fatal
(echo | gcc - -E > /dev/null) || fatal
(echo | g++ - -E > /dev/null) || fatal

echo -e "Initial invironment\n"
# Feature substitute_paths allows to substitute long paths to shortcut variables.
export substitute_paths=d1:d2 d1=some/long/path d2=some/long/path2
showv CC $'\n'
#showv substitute_paths
#showv d1
#showv d2 $'\n'

#prepare sub library
make --quiet --always-make -C sub
echo

pass()
{
	echo -e "$1\n"
	eval "$(make --always-make $target |& tee make.tmp | ./errors_resolver.py | tee out.tmp)"
	grep -e warning: -e error: -e undefined -e cannot make.tmp || true
	echo -e "\nFix:"
	cat out.tmp
	echo
}

run_errors_resolver_sample()
{
	target=errors_resolver_sample

	pass "pass 1: resolve headers paths"
	pass "pass 2: resolve headers"
	pass "pass 3: resolve libraries"
	pass "pass 3: resolve library paths"

	echo -e "Final compilation:\n"
	make --always-make $target || fatal

	if [ -e ./$target ]; then
		arch=$(echo $(file -e elf ./$target | cut -d',' -f2 | tr - _))
	else
		arch=$(uname -m)
	fi

	echo -e "\nTest run:\n"

	if [[ $arch = $(uname -m) ]]; then
		./$target
	else
		echo detected architecture $arch, machine $($CC -dumpmachine)
		qemu-${arch,,} -L /usr/"$($CC -dumpmachine)" ./$target
	fi

	echo -e "\nFinal result:\n"
	show_vars
	echo "make -B $target "
	showv LD_LIBRARY_PATH
	echo ./$target
}

run_errors_resolver_sample_cpp()
{
	echo -e "\nC++ sample\n"
	export CXXFLAGS=-std=c++98
	target=errors_resolver_sample_cpp
	pass "pass 1: resolve C++ standard"

	show_vars
	echo -e "\n\nFinal compilation:\n"
	make --always-make $target || fatal

	echo -e "\nFinal result:\n"
	show_vars
	echo "make -B $target "
	echo "./$target "
}

if [ -n "$*" ]; then
	eval "$*"
else
	(run_errors_resolver_sample)
	(run_errors_resolver_sample_cpp)
fi