AWS Lambda compatibility (#9)

* PR_SET_NAME workaround

AWS Lambdas (and other virtualized platforms) lack of support for PR_SET_NAME causing a blocking exception. Pending an upstream PR or fix in ClickHouse, this patch allows this function to fail unharmed. The resulting executable has been tested on various platforms without drawbacks and discussed in clickhouse issue [29378](ClickHouse/ClickHouse#29378)

$ sed -i '/Cannot set thread name/c\' /ClickHouse/src/Common/setThreadName.cpp

* Disable AVX2 support

Author: lmangani

chdb/build.sh

@@ -43,7 +43,7 @@ elif [ "$(uname)" == "Linux" ]; then
     GLIBC_COMPATIBILITY="-DGLIBC_COMPATIBILITY=1"
     UNWIND="-DUSE_UNWIND=1"
     PYINIT_ENTRY="-Wl,-ePyInit_${CHDB_PY_MOD}"
-    AVX_SUPPORT="-DENABLE_AVX=1 -DENABLE_AVX2=1"
+    AVX_SUPPORT="-DENABLE_AVX=1 -DENABLE_AVX2=0"
     EMBEDDED_COMPILER="-DENABLE_EMBEDDED_COMPILER=1"
 else
     echo "OS not supported"

src/Common/setThreadName.cpp

@@ -43,8 +43,8 @@ void setThreadName(const char * name)
 #else
     if (0 != prctl(PR_SET_NAME, name, 0, 0, 0))
 #endif
-        if (errno != ENOSYS && errno != EPERM)    /// It's ok if the syscall is unsupported or not allowed in some environments.
-            DB::throwFromErrno("Cannot set thread name with prctl(PR_SET_NAME, ...)", DB::ErrorCodes::PTHREAD_ERROR);
+        // if (errno != ENOSYS)    /// It's ok if the syscall is unsupported in some environments.
+        //     DB::throwFromErrno("Cannot set thread name with prctl(PR_SET_NAME, ...)", DB::ErrorCodes::PTHREAD_ERROR);
 
     memcpy(thread_name, name, std::min<size_t>(1 + strlen(name), THREAD_NAME_SIZE - 1));
 }