I guess this is supposed to be single-dash but it works either way?

c++/Makefile.am

@@ -157,7 +157,7 @@ lib_LTLIBRARIES = libkj.la libcapnp.la libcapnpc.la
 
 # -lpthread is here to work around https://bugzilla.redhat.com/show_bug.cgi?id=661333
 libkj_la_LIBADD = $(PTHREAD_LIBS) -lpthread
-libkj_la_LDFLAGS = -release $(VERSION) --no-undefined
+libkj_la_LDFLAGS = -release $(VERSION) -no-undefined
 libkj_la_SOURCES=                                              \
   src/kj/common.c++                                            \
   src/kj/units.c++                                             \
@@ -177,7 +177,7 @@ libkj_la_SOURCES=                                              \
 
 # -lpthread is here to work around https://bugzilla.redhat.com/show_bug.cgi?id=661333
 libcapnp_la_LIBADD = libkj.la $(PTHREAD_LIBS) -lpthread
-libcapnp_la_LDFLAGS = -release $(VERSION) --no-undefined
+libcapnp_la_LDFLAGS = -release $(VERSION) -no-undefined
 libcapnp_la_SOURCES=                                           \
   src/capnp/c++.capnp.c++                                      \
   src/capnp/blob.c++                                           \
@@ -196,7 +196,7 @@ libcapnp_la_SOURCES=                                           \
 
 # -lpthread is here to work around https://bugzilla.redhat.com/show_bug.cgi?id=661333
 libcapnpc_la_LIBADD = libcapnp.la libkj.la $(PTHREAD_LIBS) -lpthread
-libcapnpc_la_LDFLAGS = -release $(VERSION) --no-undefined
+libcapnpc_la_LDFLAGS = -release $(VERSION) -no-undefined
 libcapnpc_la_SOURCES=                                          \
   src/capnp/compiler/md5.h                                     \
   src/capnp/compiler/md5.c++                                   \

mega-test-quick.cfg

@@ -2,4 +2,4 @@ linux-gcc-4.7      1472 ./super-test.sh tmpdir capnp-gcc-4.7 quick
 linux-gcc-4.8      1475 ./super-test.sh tmpdir capnp-gcc-4.8 quick gcc-4.8
 linux-clang        1489 ./super-test.sh tmpdir capnp-clang quick clang
 mac                 712 ./super-test.sh remote beat caffeinate quick
-cygwin              737 ./super-test.sh remote Kenton@flashman quick
+cygwin              717 ./super-test.sh remote Kenton@flashman quick