context BUGFIX add context.c into a build system and fix issues
diff --git a/src/common.h b/src/common.h
index 0e1bc70..e6cf5e5 100644
--- a/src/common.h
+++ b/src/common.h
@@ -18,8 +18,8 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-#include "libyang.h"
 #include "config.h"
+#include "log.h"
 
 #if __STDC_VERSION__ >= 201112 && !defined __STDC_NO_THREADS__
 # define THREAD_LOCAL _Thread_local
@@ -51,6 +51,7 @@
 extern volatile uint8_t ly_log_level;
 extern volatile uint8_t ly_log_opts;
 
+void ly_err_free(void *ptr);
 void ly_log(const struct ly_ctx *ctx, LY_LOG_LEVEL level, LY_ERR no, const char *format, ...);
 
 #define LOGERR(ctx, errno, str, args...) ly_log(ctx, LY_LLERR, errno, str, ##args)
diff --git a/src/context.c b/src/context.c
index c2eba9b..31f6e3e 100644
--- a/src/context.c
+++ b/src/context.c
@@ -15,9 +15,10 @@
 #include <errno.h>
 #include <unistd.h>
 
-#include "libyang.h"
-#include "common.h"
 #include "context.h"
+#include "common.h"
+
+#include "libyang.h"
 
 #define LY_INTERNAL_MODS_COUNT 0 /* TODO 6 when parser available */
 
@@ -36,7 +37,6 @@
 #include IETF_YANG_TYPES_PATH
 #include IETF_DATASTORES
 #include IETF_YANG_LIB_PATH
-#endif
 
 static struct internal_modules_s {
     const char *name;
@@ -45,7 +45,6 @@
     uint8_t implemented;
     LYS_INFORMAT format;
 } internal_modules[LY_INTERNAL_MODS_COUNT] = {
-#if LY_INTERNAL_MODS_COUNT
     {"ietf-yang-metadata", "2016-08-05", (const char*)ietf_yang_metadata_2016_08_05_yin, 0, LYS_IN_YIN},
     {"yang", "2017-02-20", (const char*)yang_2017_02_20_yin, 1, LYS_IN_YIN},
     {"ietf-inet-types", "2013-07-15", (const char*)ietf_inet_types_2013_07_15_yin, 0, LYS_IN_YIN},
@@ -53,8 +52,8 @@
     /* ietf-datastores and ietf-yang-library must be right here at the end of the list! */
     {"ietf-datastores", "2017-08-17", (const char*)ietf_datastores_2017_08_17_yin, 0, LYS_IN_YIN},
     {"ietf-yang-library", IETF_YANG_LIB_REV, (const char*)ietf_yang_library_2018_01_17_yin, 1, LYS_IN_YIN}
-#endif
 };
+#endif
 
 API LY_ERR
 ly_ctx_set_searchdir(struct ly_ctx *ctx, const char *search_dir)
@@ -72,7 +71,7 @@
         LY_CHECK_ERR_GOTO(!new_dir,
                           LOGERR(ctx, LY_ESYS, "realpath() call failed for \"%s\" (%s).", search_dir, strerror(errno)),
                           cleanup);
-        if (ly_set_add(ctx->search_paths, new_dir) == -1) {
+        if (ly_set_add(&ctx->search_paths, new_dir, 0) == -1) {
             free(new_dir);
             return LY_EMEM;
         }
@@ -104,7 +103,7 @@
 
     if (index >= 0) {
         /* remove specific search directory */
-        return ly_set_rm_index(ctx->search_paths, index);
+        return ly_set_rm_index(&ctx->search_paths, index);
     } else {
         /* remove them all */
         for (; ctx->search_paths.number; ctx->search_paths.number--) {
@@ -125,19 +124,20 @@
     char *search_dir_list;
     char *sep, *dir;
     LY_ERR rc = LY_SUCCESS;
-    int i;
 
     ctx = calloc(1, sizeof *ctx);
-    LY_CHECK_ERR_RETURN(!ctx, LOGMEM(NULL), LY_EMEM);
+    LY_CHECK_ERR_RET(!ctx, LOGMEM(NULL), LY_EMEM);
 
     /* dictionary */
     lydict_init(&ctx->dict);
 
+#if 0 /* TODO when plugins implemented */
     /* plugins */
     ly_load_plugins();
+#endif
 
     /* initialize thread-specific key */
-    while ((i = pthread_key_create(&ctx->errlist_key, ly_err_free)) == EAGAIN);
+    while ((pthread_key_create(&ctx->errlist_key, ly_err_free)) == EAGAIN);
 
     /* models list */
     ctx->flags = options;
@@ -161,12 +161,14 @@
     }
     ctx->module_set_id = 1;
 
+#if 0 /* TODO when parser implemented */
     /* load internal modules */
     for (i = 0; i < (options & LY_CTX_NOYANGLIBRARY) ? LY_INTERNAL_MODS_COUNT - 2 : LY_INTERNAL_MODS_COUNT; i++) {
         module = (struct lys_module *)lys_parse_mem(ctx, internal_modules[i].data, internal_modules[i].format);
         LY_CHECK_GOTO(!module, error);
         module->parsed->implemented = internal_modules[i].implemented;
     }
+#endif
 
     *new_ctx = ctx;
     return rc;
@@ -259,7 +261,7 @@
 }
 
 API void
-ly_ctx_destroy(struct ly_ctx *ctx, void (*private_destructor)(const struct lys_node *node, void *priv))
+ly_ctx_destroy(struct ly_ctx *ctx, void (*private_destructor)(const struct lysc_node *node, void *priv))
 {
     LY_CHECK_ARG_RET(ctx, ctx,);
 
diff --git a/src/context.h b/src/context.h
index 4ff45ad..e907042 100644
--- a/src/context.h
+++ b/src/context.h
@@ -18,6 +18,7 @@
 #include <pthread.h>
 
 #include "common.h"
+#include "set.h"
 #include "hash_table.h"
 #include "tree_schema.h"
 
diff --git a/src/dict.h b/src/dict.h
index d24c522..2099012 100644
--- a/src/dict.h
+++ b/src/dict.h
@@ -19,12 +19,13 @@
 #include <stdint.h>
 #include <string.h>
 
-#include "libyang.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+/* dummy context structure */
+struct ly_ctx;
+
 /**
  * @defgroup dict Dictionary
  * @{
diff --git a/src/libyang.h b/src/libyang.h
index a023fbb..1a117af 100644
--- a/src/libyang.h
+++ b/src/libyang.h
@@ -107,9 +107,9 @@
  *
  * @param[in] ctx Context to be modified.
  * @param[in] search_dir New search path to add to the current paths previously set in ctx.
- * @return EXIT_SUCCESS, EXIT_FAILURE.
+ * @return LY_ERR return value.
  */
-int ly_ctx_set_searchdir(struct ly_ctx *ctx, const char *search_dir);
+LY_ERR ly_ctx_set_searchdir(struct ly_ctx *ctx, const char *search_dir);
 
 /**
  * @brief Clean the search path(s) from the libyang context
diff --git a/src/log.h b/src/log.h
index 0d67918..8ab9703 100644
--- a/src/log.h
+++ b/src/log.h
@@ -15,12 +15,13 @@
 #ifndef LY_LOG_H_
 #define LY_LOG_H_
 
-#include "libyang.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+/* dummy context structure */
+struct ly_ctx;
+
 /**
  * @defgroup log Logger
  * @{