tests: increase coverage for depcomp tests

On platforms requiring that no undefined symbols exist in order
to build shared libraries (e.g. Windows DLLs), you have to
explicitly declare that the libtool library you are building
does not actually have any undefined symbols, for libtool to
even try to build it as a shared library.  Without that
explicit declaration, libtool falls back to a static library
only, regardless of any --enable-shared flags etc.

tests/depcomp.sh (Makefile.am): Add -no-undefined if a libtool
library (.la) is built.
(src/Makefile.am): Likewise.

diff --git a/tests/depcomp.sh b/tests/depcomp.sh
index a53c0b5..708314f 100755 (executable)
--- a/tests/depcomp.sh
+++ b/tests/depcomp.sh
@@ -150,7 +150,14 @@ case $depcomp_with_libtool in
   yes)
     po=Plo objext=lo a=la
     normalized_target=libfoo_la
-    LIBPRIMARY=LTLIBRARIES LINKADD=LIBADD
+    # On platforms requiring that no undefined symbols exist in order
+    # to build shared libraries (e.g. Windows DLLs), you have to
+    # explicitly declare that the libtool library you are building
+    # does not actually have any undefined symbols, for libtool to
+    # even try to build it as a shared library.  Without that
+    # explicit declaration, libtool falls back to a static library
+    # only, regardless of any --enable-shared flags etc.
+    LIBPRIMARY=LTLIBRARIES LINKADD=LIBADD NOUNDEF=-no-undefined
     echo lib_LTLIBRARIES = libfoo.la >> Makefile.am
     make_ok ()
     {
@@ -167,7 +174,7 @@ case $depcomp_with_libtool in
   no)
     po=Po objext='$(OBJEXT)' a=a
     normalized_target=foo
-    LIBPRIMARY=LIBRARIES LINKADD=LDADD
+    LIBPRIMARY=LIBRARIES LINKADD=LDADD NOUNDEF=
     echo bin_PROGRAMS = foo >> Makefile.am
     make_ok ()
     {
@@ -185,6 +192,7 @@ SUBDIRS = src
 # We include subfoo only to be sure that the munging in depcomp
 # doesn't remove too much from the object file name.
 ${normalized_target}_SOURCES = foo.c sub/subfoo.c foo.h sub/subfoo.h
+${normalized_target}_LDFLAGS = ${NOUNDEF}
 ${normalized_target}_${LINKADD} = src/libbaz.$a
 
 .PHONY: grep-test
@@ -207,6 +215,7 @@ noinst_${LIBPRIMARY} = libbaz.$a
 # We include sub2foo only to be sure that the munging in depcomp
 # doesn't remove too much from the object file name.
 libbaz_${a}_SOURCES = baz.c sub2/sub2foo.c baz.h sub2/sub2foo.h
+libbaz_${a}_LDFLAGS = ${NOUNDEF}
 END
 
 cat > foo.c <<'END'