add --enable-wallet-only flag to build libtalerutil_wallet which ONLY contains the wallet-specific API subset

configure.ac

@@ -38,6 +38,21 @@ CFLAGS="-Wall $CFLAGS"
 # Checks for header files.
 AC_CHECK_HEADERS([stdint.h stdlib.h string.h unistd.h])
 
+
+# should the build process be restricted to the code required
+# for GNU Taler wallets?
+AC_MSG_CHECKING(whether to compile GNU Taler Wallet library ONLY)
+AC_ARG_ENABLE([wallet],
+   [AS_HELP_STRING([--wallet], [only compile for Taler wallet])],
+   [wallet_only=${enableval}],
+   [wallet_only=no])
+AC_MSG_RESULT($wallet_only)
+AM_CONDITIONAL([WALLET_ONLY], [test "x$wallet_only" = "xyes"])
+
+if test "$wallet_only" != yes
+then
+
+
 # Check for GNUnet's libgnunetutil.
 libgnunetutil=0
 AC_MSG_CHECKING([for libgnunetutil])
@@ -64,14 +79,6 @@ AS_IF([test $libgnunetutil != 1],
 ***   https://gnunet.org
 *** ]])])
 
-
-TALER_LIB_LDFLAGS="-export-dynamic -no-undefined"
-TALER_PLUGIN_LDFLAGS="-export-dynamic -avoid-version -module -no-undefined"
-
-AC_SUBST(TALER_LIB_LDFLAGS)
-AC_SUBST(TALER_PLUGIN_LDFLAGS)
-
-
 # check for libmicrohttpd
 microhttpd=0
 AC_MSG_CHECKING([for microhttpd])
@@ -94,13 +101,6 @@ AS_IF([test $microhttpd = 0],
 *** ]])])
 
 
-# test for postgres
-AX_LIB_POSTGRESQL([9.3])
-if test "$found_postgresql" = "yes"; then
-  postgres=true
-fi
-AM_CONDITIONAL(HAVE_POSTGRESQL, test x$postgres = xtrue)
-
 # check for libjansson (Jansson JSON library)
 jansson=0
 AC_MSG_CHECKING([for jansson])
@@ -122,6 +122,53 @@ AS_IF([test $jansson = 0],
 *** You need libjansson to build this program.
 *** ]])])
 
+
+
+else
+
+# Check for GNUnet's libgnunetutil_taler_wallet.
+libgnunetutil_taler_wallet=0
+AC_MSG_CHECKING([for libgnunetutil_taler_wallet])
+AC_ARG_WITH(gnunet,
+            [AS_HELP_STRING([--with-gnunet=PFX], [base of GNUnet installation])],
+            [AC_MSG_RESULT([given as $with_gnunet])],
+            [AC_MSG_RESULT(not given)
+             with_gnunet=yes])
+AS_CASE([$with_gnunet],
+        [yes], [],
+        [no], [AC_MSG_ERROR([--with-gnunet is required])],
+        [LDFLAGS="-L$with_gnunet/lib $LDFLAGS"
+         CPPFLAGS="-I$with_gnunet/include $CPPFLAGS"])
+AC_CHECK_HEADERS([gnunet/platform.h gnunet/gnunet_util_taler_wallet_lib.h],
+ [AC_CHECK_LIB([gnunetutil_taler_wallet], [GNUNET_CRYPTO_hash], libgnunetutil_taler_wallet=1)],
+  [], [#ifdef HAVE_GNUNET_PLATFORM_H
+        #include <gnunet/platform.h>
+       #endif])
+AS_IF([test $libgnunetutil_taler_wallet != 1],
+  [AC_MSG_ERROR([[
+***
+*** You need libgnunetutil_taler_wallet to build this program.
+*** This library is part of GNUnet, available at
+***   https://gnunet.org/
+*** Run GNUnet's configure with --enable-taler-wallet as well!
+*** ]])])
+
+fi
+
+TALER_LIB_LDFLAGS="-export-dynamic -no-undefined"
+TALER_PLUGIN_LDFLAGS="-export-dynamic -avoid-version -module -no-undefined"
+
+AC_SUBST(TALER_LIB_LDFLAGS)
+AC_SUBST(TALER_PLUGIN_LDFLAGS)
+
+
+# test for postgres
+AX_LIB_POSTGRESQL([9.3])
+if test "$found_postgresql" = "yes"; then
+  postgres=true
+fi
+AM_CONDITIONAL(HAVE_POSTGRESQL, test x$postgres = xtrue)
+
 # check for libgnurl
 # libgnurl
 LIBGNURL_CHECK_CONFIG(,7.34.0,gnurl=1,gnurl=0)

src/Makefile.am

@@ -3,7 +3,13 @@ AM_CPPFLAGS = -I$(top_srcdir)/src/include
 if HAVE_POSTGRESQL
   PQ_DIR = pq
 endif
+if WALLET_ONLY
+SUBDIRS = include util
+else
+
 SUBDIRS = include util $(PQ_DIR) mintdb mint mint-tools
 if HAVE_LIBCURL
  SUBDIRS += mint-lib
 endif
+
+endif

src/include/Makefile.am

@@ -1,6 +1,15 @@
 # This Makefile.am is in the public domain
 talerincludedir = $(includedir)/taler
 
+if WALLET_ONLY
+talerinclude_HEADERS = \
+  platform.h \
+  taler_amount_lib.h \
+  taler_crypto_lib.h \
+  taler_util_wallet.h
+
+else
+
 talerinclude_HEADERS = \
   platform.h \
   taler_amount_lib.h \
@@ -12,3 +21,5 @@ talerinclude_HEADERS = \
   taler_mintdb_plugin.h \
   taler_pq_lib.h \
   taler_signatures.h
+
+endif

src/util/Makefile.am

@@ -6,8 +6,27 @@ if USE_COVERAGE
   XLIB = -lgcov
 endif
 
+if WALLET_ONLY
+lib_LTLIBRARIES = \
+  libtalerutil_wallet.la
+else
 lib_LTLIBRARIES = \
   libtalerutil.la
+endif
+
+libtalerutil_wallet_la_SOURCES = \
+  amount.c \
+  crypto.c \
+  util.c
+
+libtalerutil_wallet_la_LIBADD = \
+  -lgnunetutil_taler_wallet \
+  $(LIBGCRYPT_LIBS) \
+  $(XLIB)
+
+libtalerutil_wallet_la_LDFLAGS = \
+  -version-info 0:0:0 \
+  -export-dynamic -no-undefined
 
 libtalerutil_la_SOURCES = \
   amount.c \