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每当我尝试使用 accull 编译器（用于编译 openACC）编译以下代码时，都会收到一条非常奇怪的错误消息。安装随附的基本开箱即用代码已编译并运行得很好，但是每当我尝试从 nvidia 运行代码时

https://github.com/parallel-forall/cudacasts/tree/master/ep3-first-openacc-program

我收到以下错误。这可能与编译器的差异有关？Nvidia 推荐 PGI，但我目前使用 acull，因为它是免费的。

ubuntu@tegra-ubuntu:~/accull/example$ accull -v -o main.x laplace2d.c
 ****************************************
                 _    _ _      _          
                | |  | | |    | |        
   __ _  ___ ___| |  | | |    | |        
  / _` |/ __/ __| |  | | |    | |        
 | (_| | (_| (__| |__| | |____| |____    
  \__,_|\___\___|\____/|______|______|    
 ****************************************
 Release 0.4alpha

* Verbose output
* Output executable name main.x
* Processing laplace2d.c to ./accull_rVpRz/laplace2d.c
* Building laplace2d.c
* Running StS translation
Parsing laplace2d.c ....  laplace2d.c :
159:
160:    StartTimer();
161:    int iter = 0;
162:
163: #pragma acc data copy(A), create(Anew)
164:
165:    while ( error > tol && iter < iter_max )
166:      {
167:        error = 0.0;

ParseError: File: laplace2d.c: 125:  before: acc

Traceback (most recent call last):
  File "/home/ubuntu/accull/yacf//bin/c2frangollo.py", line 114, in <module>
    [ast_, prepro_class, lexer_class, parser_class,] = FrontendFactory().parse_with_language_list(original_source, filename, config.CURRENT_LANGUAGES,dirs)
  File "/home/ubuntu/accull/yacf/Frontend/FrontendFactory.py", line 318, in parse_with_language_list
    raise pe
Frontend.Acc.plyparser.ParseError: <stdin>:125: before: acc
! Compilation of laplace2d.c FAILED (no Project directory build )
/usr/local/cuda/bin/nvcc -Xcompiler -fopenmp -lrt -lcuda -lOpenCL -lrt -lcuda -arch=sm_20 pi.o _pi_random_1.o /home/ubuntu/accull/frangollo/src/libfrangollo.a -o main.x
* Finished
ubuntu@tegra-ubuntu:~/accull/example$
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