compilation

问题 The inner query is giving problem. MERGE INTO evaluation_fact eval_fact USING (SELECT $27 tim_id , $28 dt_id , $13 w_id FROM @REPORTING_MERGE_STAGE/reporting-data-ingest/Evaluation-IT.csv) csv_data ON eval_fact.w_id = csv_data.w_id WHEN matched THEN UPDATE SET tim_id = (SELECT day_id FROM rom dates_dim d WHERE d.day_id = csv_data.tim_id), dt_id = (SELECT time_id FROM time_dim t WHERE t.time_name = csv_data.dt_id) WHEN NOT matched THEN INSERT (tim_id, dt_id) VALUES ( (SELECT day_id FROM dates

问题 The inner query is giving problem. MERGE INTO evaluation_fact eval_fact USING (SELECT $27 tim_id , $28 dt_id , $13 w_id FROM @REPORTING_MERGE_STAGE/reporting-data-ingest/Evaluation-IT.csv) csv_data ON eval_fact.w_id = csv_data.w_id WHEN matched THEN UPDATE SET tim_id = (SELECT day_id FROM rom dates_dim d WHERE d.day_id = csv_data.tim_id), dt_id = (SELECT time_id FROM time_dim t WHERE t.time_name = csv_data.dt_id) WHEN NOT matched THEN INSERT (tim_id, dt_id) VALUES ( (SELECT day_id FROM dates

问题 I know -fPIC is necessary for shared libraries and know why. However, I am not clear on the question: Should -fPIC never be used during building an executable or a static library? 回答1: Should -fPIC never be used during building an executable or a static library? Never is a strong word, and the statement above is false. Code built with -fPIC is (slightly) less optimal, so why would you want to put it into anything other than a shared library? Let's start with a static library, which has an

问题 I'm sticking on the usage of following two files, which are Mcrt1.o and Scrt1.o. Can anyone help to let me know what are those two files for. How to use it? Let's take gcrt1.o for example, which is quite useful when compile with -pg option for performance test. Thanks 回答1: Files of the form *crt*.o are invariably C runtime startup code (the bulk of the C runtime tends to exist in libraries, the startup code is an object file as it's always needed). The description of the various types can be

问题 This question already has answers here : Why are “Executable files” operating system dependent? (6 answers) Closed 23 hours ago . This is more of a theoretical question than anything. I'm a Comp sci major with a huge interest in low level programming. I love finding out how things work under the hood. My specialization is compiler design. Anyway, as I'm working on my first compiler, things are occurring to me that are kind of confusing. When you write a program in C/C++, the traditional thing

问题 I know this question has been asked before, but there wasn't a satisfactory answer, and the last post was three years ago. I am using android studio 3.6.2 in windows 10. Every time I try to compile my program I get the error "The process cannot access the file because it is being used by another process." Now I know what is causing the error. The R.jar file that was previously compiled cannot be deleted because android studio is locking the file. It is in a folder \app\build\intermediates

问题 I know this question has been asked before, but there wasn't a satisfactory answer, and the last post was three years ago. I am using android studio 3.6.2 in windows 10. Every time I try to compile my program I get the error "The process cannot access the file because it is being used by another process." Now I know what is causing the error. The R.jar file that was previously compiled cannot be deleted because android studio is locking the file. It is in a folder \app\build\intermediates

问题 I know this question has been asked before, but there wasn't a satisfactory answer, and the last post was three years ago. I am using android studio 3.6.2 in windows 10. Every time I try to compile my program I get the error "The process cannot access the file because it is being used by another process." Now I know what is causing the error. The R.jar file that was previously compiled cannot be deleted because android studio is locking the file. It is in a folder \app\build\intermediates

问题 I am trying to call external C++ function from NASM. As I was searching on google I did not find any related solution. C++ void kernel_main() { char* vidmem = (char*)0xb8000; /* And so on... */ } NASM ;Some calls before section .text ;nothing special here global start extern kernel_main ;our problem After running compiling these two files I am getting this error: kernel.asm(.text+0xe): undefined reference to kernel_main' What is wrong here? Thanks. 回答1: There is no standardized method of

问题 I need to create a mobile app that contains other apps and can run them. It is basically like an "app center" which have a list of apps (that we publish on our server) and the user can open one of them which lead to the app being opened. Think about Expo's app, the user can scan the QR code of his app and it will be automatically compiled and opened, this is close to the feature I want. The apps that can be opened are created using react-native and stored inside GIT repositories in Gitlab.