static build: do not use openssl engines

We want minimal static build. And this now also breaks with our openssl
since it tries to automatically dlopen some of the engine modules.

.gitignore

@@ -1,4 +1,5 @@
 apk
+apk.static
 *.o
 *.d
 *.cmd

src/Makefile

@@ -41,9 +41,10 @@ endif
 
 CFLAGS_ALL		+= -D_ATFILE_SOURCE
 CFLAGS_apk.o		:= -DAPK_VERSION=\"$(FULL_VERSION)\"
+CFLAGS_apk-static.o	:= -DAPK_VERSION=\"$(FULL_VERSION)\" -DOPENSSL_NO_ENGINE
 
 progs-$(STATIC)		+= apk.static
-apk.static-objs		:= $(apk-objs)
+apk.static-objs		:= $(filter-out apk.o,$(apk-objs)) apk-static.o
 LDFLAGS_apk.static	:= -static
 LDFLAGS_apk		+= -nopie -L$(obj)
 

src/apk-static.c

@@ -0,0 +1 @@
+apk.c

src/apk.c

@@ -12,13 +12,17 @@
 #include <stdio.h>
 #include <fcntl.h>
 #include <ctype.h>
+#include <errno.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 #include <getopt.h>
 #include <sys/stat.h>
 
+#include <openssl/crypto.h>
+#ifndef OPENSSL_NO_ENGINE
 #include <openssl/engine.h>
+#endif
 
 #include "apk_defines.h"
 #include "apk_database.h"