use single quotes for passing define

makes sure that the shell doesn't evaluate parts of the define

src/libopensc/Makefile.am

@@ -14,9 +14,9 @@ noinst_HEADERS = cards.h ctbcs.h internal.h esteid.h muscle.h muscle-filesystem.
 	pace.h cwa14890.h cwa-dnie.h card-gids.h aux-data.h \
 	jpki.h sc-ossl-compat.h card-npa.h ccid-types.h reader-tr03119.h
 
-AM_CPPFLAGS = -DOPENSC_CONF_PATH=\"$(sysconfdir)/opensc.conf\" \
-     -DDEFAULT_SM_MODULE_PATH=\"$(DEFAULT_SM_MODULE_PATH)\" \
-     -DDEFAULT_SM_MODULE=\"$(DEFAULT_SM_MODULE)\" \
+AM_CPPFLAGS = -D'OPENSC_CONF_PATH="$(sysconfdir)/opensc.conf"' \
+     -D'DEFAULT_SM_MODULE_PATH="$(DEFAULT_SM_MODULE_PATH)"' \
+     -D'DEFAULT_SM_MODULE="$(DEFAULT_SM_MODULE)"' \
 	-I$(top_srcdir)/src
 AM_CFLAGS = $(OPENPACE_CFLAGS) $(OPTIONAL_OPENSSL_CFLAGS) $(OPTIONAL_OPENCT_CFLAGS) \
 	$(OPTIONAL_PCSC_CFLAGS) $(OPTIONAL_ZLIB_CFLAGS)

src/pkcs15init/Makefile.am

@@ -32,7 +32,7 @@ dist_pkgdata_DATA = \
 	openpgp.profile sc-hsm.profile \
 	isoApplet.profile gids.profile
 
-AM_CPPFLAGS = -DSC_PKCS15_PROFILE_DIRECTORY=\"$(pkgdatadir)\" \
+AM_CPPFLAGS = -D'SC_PKCS15_PROFILE_DIRECTORY="$(pkgdatadir)"' \
 	-I$(top_srcdir)/src
 AM_CFLAGS = $(OPTIONAL_OPENSSL_CFLAGS)
 

src/tools/Makefile.am

@@ -39,7 +39,7 @@ endif
 
 # compile with $(PTHREAD_CFLAGS) to allow debugging with gdb
 AM_CFLAGS = $(OPTIONAL_OPENSSL_CFLAGS) $(OPTIONAL_READLINE_CFLAGS) $(PTHREAD_CFLAGS)
-AM_CPPFLAGS = -I$(top_srcdir)/src -DDEFAULT_PKCS11_PROVIDER=\"$(DDEFAULT_PKCS11_PROVIDER)\"
+AM_CPPFLAGS = -I$(top_srcdir)/src -D'DEFAULT_PKCS11_PROVIDER="$(DDEFAULT_PKCS11_PROVIDER)"'
 LIBS = \
 	$(top_builddir)/src/libopensc/libopensc.la \
 	$(top_builddir)/src/common/libscdl.la \