#! /bin/sh -e
# tup - A file-based build system
#
# Copyright (C) 2008-2024  Mike Shal <marfey@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

. ./tup.sh
cat > Tupfile << HERE
: foreach *.c |> gcc -fcommon -c %f -o %o |> %B.o
: *.o |> gcc -fcommon %f -o %o |> prog.exe
HERE

(echo "#include \"foo.h\""; echo "int main(void) {}") > foo.c
(echo "#include \"foo.h\""; echo "void bar1(void) {}") > bar.c
echo "int marfx;" > foo.h
update
sym_check foo.o main marfx
sym_check bar.o bar1 marfx
sym_check prog.exe main bar1

# If we re-compile bar.c without the header, foo.h will have a dangling ref
# to bar.o
echo "void bar1(void) {}" > bar.c
update
sym_check bar.o bar1 ^marfx

# Now the tricky part - we touch foo.h (which has refs to both .o files) and
# see if only foo.c is re-compiled. Also, the foo.h->bar.o link should be gone
rm foo.o
ln bar.o oldbar.o
tup touch foo.h
update --no-scan
check_same_link bar.o oldbar.o
rm oldbar.o
sym_check foo.o main marfx
tup_dep_no_exist . foo.h . "gcc -fcommon -c bar.c -o bar.o"

# Make sure the foo.h->foo.o link still exists and wasn't marked obsolete for
# some reason.
update
tup_dep_exist . foo.h . "gcc -fcommon -c foo.c -o foo.o"
tup_dep_exist . "gcc -fcommon -c foo.c -o foo.o" . foo.o

eotup
