support GCC 4.8

[TD-307]

.travis.yml

@@ -203,6 +203,29 @@ matrix:
           ;;
         esac
 
+  - os: linux
+    dist: trusty
+    language: c
+    git:
+      - depth: 1
+
+    addons:
+      apt:
+        packages:
+          - build-essential
+          - cmake
+    env: 
+      - DESC="trusty/gcc-4.8 build"
+
+    before_script:
+      - cd ${TRAVIS_BUILD_DIR}
+      - mkdir debug
+      - cd debug
+
+    script:
+      - cmake .. > /dev/null
+      - make > /dev/null
+
   - os: linux
     language: c
     compiler: clang

src/client/src/tscPrepare.c

@@ -194,7 +194,7 @@ static int normalStmtPrepare(STscStmt* stmt) {
 
 static char* normalStmtBuildSql(STscStmt* stmt) {
   SNormalStmt* normal = &stmt->normal;
-  SStringBuilder sb = {0};
+  SStringBuilder sb; memset(&sb, 0, sizeof(sb));
 
   if (taosStringBuilderSetJmp(&sb) != 0) {
     taosStringBuilderDestroy(&sb);

src/client/src/tscSQLParser.c

@@ -3558,7 +3558,7 @@ static int32_t setTableCondForSTableQuery(SQueryInfo* pQueryInfo, const char* ac
     return TSDB_CODE_SUCCESS;
   }
 
-  SStringBuilder sb1 = {0};
+  SStringBuilder sb1; memset(&sb1, 0, sizeof(sb1));
   taosStringBuilderAppendStringLen(&sb1, QUERY_COND_REL_PREFIX_IN, QUERY_COND_REL_PREFIX_IN_LEN);
 
   char db[TSDB_TABLE_ID_LEN] = {0};
@@ -3813,7 +3813,7 @@ int32_t parseWhereClause(SQueryInfo* pQueryInfo, tSQLExpr** pExpr, SSqlObj* pSql
   pQueryInfo->window.ekey = INT64_MAX;
 
   // tags query condition may be larger than 512bytes, therefore, we need to prepare enough large space
-  SStringBuilder sb = {0};
+  SStringBuilder sb; memset(&sb, 0, sizeof(sb));
   SCondExpr      condExpr = {0};
 
   if ((*pExpr)->pLeft == NULL || (*pExpr)->pRight == NULL) {

src/client/src/tscSubquery.c

@@ -488,7 +488,7 @@ void tscBuildVgroupTableInfo(STableMetaInfo* pTableMetaInfo, SArray* tables) {
     if( prev == NULL || tt->vgId != prev->vgId ) {
       SVgroupsInfo* pvg = pTableMetaInfo->vgroupList;
 
-      SVgroupTableInfo info = { 0 };
+      SVgroupTableInfo info = {{ 0 }};
       for( int32_t m = 0; m < pvg->numOfVgroups; ++m ) {
         if( tt->vgId == pvg->vgroups[m].vgId ) {
           info.vgInfo = pvg->vgroups[m];

src/dnode/src/dnodeMain.c

@@ -84,7 +84,7 @@ int32_t main(int32_t argc, char *argv[]) {
   }
 
   /* Set termination handler. */
-  struct sigaction act = {0};
+  struct sigaction act = {{0}};
   act.sa_flags = SA_SIGINFO;
   act.sa_sigaction = signal_handler;
   sigaction(SIGTERM, &act, NULL);

src/dnode/src/dnodeModule.c

@@ -33,7 +33,7 @@ typedef struct {
   void    (*stopFp)();
 } SModule;
 
-static SModule  tsModule[TSDB_MOD_MAX] = {0};
+static SModule  tsModule[TSDB_MOD_MAX] = {{0}};
 static uint32_t tsModuleStatus = 0;
 
 static void dnodeSetModuleStatus(int32_t module) {

src/os/linux/inc/os.h

@@ -253,6 +253,17 @@ void taosBlockSIGPIPE();
 #define BUILDIN_CLZ(val) __builtin_clz(val)
 #define BUILDIN_CTZ(val) __builtin_ctz(val)
 
+#undef threadlocal
+#ifdef _ISOC11_SOURCE
+  #define threadlocal _Thread_local
+#elif defined(__APPLE__)
+  #define threadlocal
+#elif defined(__GNUC__) && !defined(threadlocal)
+  #define threadlocal __thread
+#else
+  #define threadlocal
+#endif
+
 #ifdef __cplusplus
 }
 #endif

src/os/linux/src/linuxPlatform.c

@@ -157,7 +157,7 @@ void *taosProcessAlarmSignal(void *tharg) {
   void (*callback)(int) = tharg;
 
   static timer_t         timerId;
-  struct sigevent sevent = {0};
+  struct sigevent sevent = {{0}};
 
   #ifdef _ALPINE
     sevent.sigev_notify = SIGEV_THREAD;

src/tsdb/src/tsdbMain.c

@@ -161,7 +161,7 @@ static int tsdbRestoreInfo(STsdbRepo *pRepo) {
   SFileGroup *pFGroup = NULL;
 
   SFileGroupIter iter;
-  SRWHelper      rhelper = {0};
+  SRWHelper      rhelper = {{0}};
 
   if (tsdbInitReadHelper(&rhelper, pRepo) < 0) goto _err;
   tsdbInitFileGroupIter(pFileH, &iter, TSDB_ORDER_ASC);
@@ -948,7 +948,7 @@ static void *tsdbCommitData(void *arg) {
   STsdbCache *pCache = pRepo->tsdbCache;
   STsdbCfg *  pCfg = &(pRepo->config);
   SDataCols * pDataCols = NULL;
-  SRWHelper   whelper = {0};
+  SRWHelper   whelper = {{0}};
   if (pCache->imem == NULL) return NULL;
 
   tsdbPrint("vgId: %d, starting to commit....", pRepo->config.tsdbId);

src/util/src/exception.c

+#include "os.h"
 #include "exception.h"
 
 
-static _Thread_local SExceptionNode* expList;
+static threadlocal SExceptionNode* expList;
 
 void exceptionPushNode( SExceptionNode* node ) {
     node->prev = expList;

src/util/src/tconfig.c

@@ -25,7 +25,7 @@
 #include "tsystem.h"
 #include "tutil.h"
 
-SGlobalCfg tsGlobalConfig[TSDB_CFG_MAX_NUM] = {0};
+SGlobalCfg tsGlobalConfig[TSDB_CFG_MAX_NUM] = {{0}};
 int32_t    tsGlobalConfigNum = 0;
 
 static char *tsGlobalUnit[] = {

src/util/src/tdes.c

@@ -32,7 +32,7 @@ char* taosDesImp(unsigned char* key, char* src, unsigned int len, int process_mo
   unsigned int  number_of_blocks = len / 8;
   unsigned char data_block[9] = {0};
   unsigned char processed_block[9] = {0};
-  key_set       key_sets[17] = {0};
+  key_set       key_sets[17]; memset(key_sets, 0, sizeof(key_sets));
   char*         dest = calloc(len + 1, 1);
   generate_sub_keys(key, key_sets);
 

src/util/src/terror.c

@@ -27,10 +27,11 @@ typedef struct {
 } STaosError;
  
 
+#include "os.h"
 #include "taoserror.h"
 
 
-static _Thread_local int32_t tsErrno;
+static threadlocal int32_t tsErrno;
 int32_t* taosGetErrno() {
   return &tsErrno;
 }