Rewrite tests in automake

- add options in AM_INIT_AUTOMAKE to be more strict
  and to enable more advanced features (color-tests and parallel-tests)
- rewrite tests/Makefile.am to use automake rules for building program and libraries

=> we can now do:
./bootstrap.sh && mkdir build && cd build && ../configure && make -j distcheck

configure.ac

@@ -1,7 +1,7 @@
 AC_INIT([patchelf], m4_esyscmd([echo -n $(cat ./version)$VERSION_SUFFIX]))
 AC_CONFIG_SRCDIR([src/patchelf.cc])
 AC_CONFIG_AUX_DIR([build-aux])
-AM_INIT_AUTOMAKE([dist-bzip2 foreign])
+AM_INIT_AUTOMAKE([-Wall -Werror dist-bzip2 foreign color-tests parallel-tests])
 
 AC_PROG_CC
 AC_PROG_CXX

tests/Makefile.am

@@ -1,56 +1,64 @@
-check_PROGRAMS = main main-scoped simple big-dynstr
+check_PROGRAMS = simple main main-scoped big-dynstr
 
 TESTS = plain-fail.sh plain-run.sh shrink-rpath.sh set-interpreter-short.sh \
   set-interpreter-long.sh set-rpath.sh no-rpath.sh big-dynstr.sh \
   set-rpath-library.sh
+EXTRA_DIST = no-rpath $(TESTS)
 
 TESTS_ENVIRONMENT = PATCHELF_DEBUG=1
 
+CLEANFILES = big-dynstr.c
+clean-local:
+	$(RM) -r scratch
+
+# by default, use -fpic to compile
+AM_CFLAGS = -fpic
+LDFLAGS_local = -Wl,--disable-new-dtags -Wl,-rpath-link=. -L. $(AM_LDFLAGS)
+LDFLAGS_sharedlib = -Wl,--disable-new-dtags -shared -L. $(AM_LDFLAGS)
+export NIX_DONT_SET_RPATH=1
 
 simple_SOURCES = simple.c
-main_scoped_SOURCES =
+# no -fpic for simple.o
+simple_CFLAGS =
 
+main_SOURCES = main.c
+main_LDADD = -lfoo $(AM_LDADD)
+main_DEPENDENCIES = libfoo.so
+main_LDFLAGS = $(LDFLAGS_local)
 
-main: main.o libfoo.so
-	LD_LIBRARY_PATH=. gcc -Wl,--disable-new-dtags -o main main.o -L . -lfoo
-
-main-scoped: main.o libfoo-scoped.so
-	LD_LIBRARY_PATH=. gcc -Wl,--enable-new-dtags -o main-scoped main.o -L . -lfoo-scoped
-
-main.o: main.c
-	$(CC) -fpic -o $@ -c $<
-
-libfoo.so: foo.o libbar.so
-	NIX_DONT_SET_RPATH=1 $(CC) -Wl,--disable-new-dtags -shared -o libfoo.so foo.o -L . -lbar
-
-libfoo-scoped.so: foo.o libbar-scoped.so
-	NIX_DONT_SET_RPATH=1 $(CC) -Wl,--enable-new-dtags -shared -o libfoo-scoped.so foo.o -L . -lbar-scoped
-
-foo.o: foo.c
-	$(CC) -fpic -o $@ -c $<
-
-libbar.so: bar.o
-	NIX_DONT_SET_RPATH=1 $(CC) -Wl,--disable-new-dtags -shared -o libbar.so bar.o -L . -Wl,-rpath,`pwd`/no-such-path
-
-libbar-scoped.so: bar.o
-	NIX_DONT_SET_RPATH=1 $(CC) -Wl,--enable-new-dtags -shared -o libbar-scoped.so bar.o
-
-bar.o: bar.c
-	$(CC) -fpic -o $@ -c $<
-
-
-big_dynstr_SOURCES = big-dynstr.c
-
-big-dynstr: big-dynstr.o libfoo.so
-	LD_LIBRARY_PATH=. gcc -Wl,--disable-new-dtags -o big-dynstr big-dynstr.o -L . -lfoo
+main_scoped_SOURCES = main.c
+main_scoped_LDADD = -lfoo-scoped $(AM_LDADD)
+main_scoped_DEPENDENCIES = libfoo-scoped.so
+main_scoped_LDFLAGS = $(LDFLAGS_local)
 
 big-dynstr.c: main.c
 	cat $< > big-dynstr.c
 	for i in $$(seq 1 2000); do echo "void f$$i(void) { };" >> big-dynstr.c; done
 
+nodist_big_dynstr_SOURCES = big-dynstr.c
+big_dynstr_LDADD = -lfoo $(AM_LDADD)
+big_dynstr_DEPENDENCIES = libfoo.so
+big_dynstr_LDFLAGS = $(LDFLAGS_local)
 
-clean-local:
-	$(RM) *.o libfoo.so libbar.so main big-dynstr big-dynstr.c
+# declare local shared libraries as programs as:
+# - without libtool, only archives (static libraries) can be built by automake
+# - with libtool, it is difficult to control options
+# - with libtool, it is not possible to compile convenience *dynamic* libraries :-(
+check_PROGRAMS += libfoo.so libfoo-scoped.so libbar.so libbar-scoped.so
 
+libfoo_so_SOURCES = foo.c
+libfoo_so_LDADD = -lbar $(AM_LDADD)
+libfoo_so_DEPENDENCIES = libbar.so
+libfoo_so_LDFLAGS = $(LDFLAGS_sharedlib)
+
+libfoo_scoped_so_SOURCES = foo.c
+libfoo_scoped_so_LDADD = -lbar-scoped $(AM_LDADD)
+libfoo_scoped_so_DEPENDENCIES = libbar-scoped.so
+libfoo_scoped_so_LDFLAGS = $(LDFLAGS_sharedlib)
+
+libbar_so_SOURCES = bar.c
+libbar_so_LDFLAGS = $(LDFLAGS_sharedlib) -Wl,-rpath,`pwd`/no-such-path
+
+libbar_scoped_so_SOURCES = bar.c
+libbar_scoped_so_LDFLAGS = $(LDFLAGS_sharedlib)
 
-EXTRA_DIST = main.c foo.c bar.c no-rpath $(TESTS)