Makefile: don't try to build sql plugin if there's no sqlite3 support.

Reported-by: @whitslack
Fixes: #5940
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

doc/Makefile

@@ -60,7 +60,6 @@ MANPAGES := doc/lightning-cli.1 \
 	doc/lightning-listpeers.7 \
 	doc/lightning-listpeerchannels.7 \
 	doc/lightning-listsendpays.7 \
-	doc/lightning-listsqlschemas.7 \
 	doc/lightning-makesecret.7 \
 	doc/lightning-multifundchannel.7 \
 	doc/lightning-multiwithdraw.7 \
@@ -86,7 +85,6 @@ MANPAGES := doc/lightning-cli.1 \
 	doc/lightning-setchannel.7 \
 	doc/lightning-sendcustommsg.7 \
 	doc/lightning-signmessage.7 \
-	doc/lightning-sql.7 \
 	doc/lightning-staticbackup.7 \
 	doc/lightning-txprepare.7 \
 	doc/lightning-txdiscard.7 \
@@ -110,6 +108,11 @@ MANPAGES := doc/lightning-cli.1 \
 	doc/lightning-getlog.7 \
 	doc/reckless.7
 
+ifeq ($(HAVE_SQLITE3),1)
+MANPAGES += doc/lightning-listsqlschemas.7 \
+	    doc/lightning-sql.7
+endif
+
 doc-all: $(MANPAGES) doc/index.rst
 
 SCHEMAS := $(wildcard doc/schemas/*.json)

plugins/Makefile

@@ -87,7 +87,6 @@ PLUGIN_ALL_HEADER :=				\
 	$(PLUGIN_PAY_LIB_HEADER)		\
 	$(PLUGIN_OFFERS_HEADER)			\
 	$(PLUGIN_SPENDER_HEADER)
-PLUGIN_ALL_OBJS := $(PLUGIN_ALL_SRC:.c=.o)
 
 C_PLUGINS :=					\
 	plugins/autoclean			\
@@ -101,10 +100,16 @@ C_PLUGINS :=					\
 	plugins/offers				\
 	plugins/pay				\
 	plugins/txprepare			\
-	plugins/sql				\
 	plugins/spenderp
 
+ifeq ($(HAVE_SQLITE3),1)
+C_PLUGINS += plugins/sql
+PLUGIN_ALL_SRC += $(PLUGIN_SQL_SRC)
+PLUGIN_ALL_HEADER += $(PLUGIN_SQL_HEADER)
+endif
+
 PLUGINS := $(C_PLUGINS)
+PLUGIN_ALL_OBJS := $(PLUGIN_ALL_SRC:.c=.o)
 
 ifneq ($(RUST),0)
 # Builtin plugins must be in this plugins dir to work when we're executed