如何解决pgcc& openacc链接器错误"__pgi_uacc_multicorestart"，"__ pgi_uacc_multicoreend"；

问题描述

限时删除！！

我正在尝试在Ubuntu 16.04 LTS上使用OpenACC 2.5将C中的程序并行化.经过简单的修改(仅添加一行)，我可以将所有.c文件编译为.o文件.在链接步骤中，pgcc编译器显示

I am trying to parallelize my program in C with OpenACC 2.5 on Ubuntu 16.04 LTS. After a simple modification which is just adding one line, I can compile all my .c files to .o files. In the linking step, pgcc compiler shows

和

. Google搜索未显示与这些错误消息相关的任何内容.请帮助我解决这个问题.

. Google search shows nothing related to these error message. Please help me on this problem.

这是与我的系统和程序有关的信息和源代码.我尝试发布必要的部分，如果您还有其他需要，请告诉我.

Here is the information and source code related to my system and program. I try to post the essential part and please let me know if you need anything else.

操作系统，软件:

LSB Version:    core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:printing-9.20160110ubuntu0.2-amd64:printing-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.3 LTS
Release:    16.04
Codename:   xenial

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.4.0-6ubuntu1~16.04.5' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5)

pgcc 17.10-0 64-bit target on x86-64 Linux -tp haswell
PGI Compilers and Tools
Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.

.bashrc:

#CUDA
export PATH=/usr/local/cuda/bin:$PATH;
export LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH;
#####
ulimit -s unlimited
#####
#Environment Modules
source /usr/share/modules/init/bash
module add /opt/pgi/modulefiles/pgi64/17.10
module add /opt/pgi/modulefiles/openmpi/2.1.2/2017
#####
#intel compiler
source /opt/intel/bin/compilervars.sh intel64
#intel vtune
source /opt/intel/vtune_amplifier/amplxe-vars.sh
#intel advisor
source /opt/intel/advisor/advixe-vars.sh
#intel inspector
source /opt/intel/inspector/inspxe-vars.sh
#intel mkl
source /opt/intel/mkl/bin/mklvars.sh intel64

makefile:

CC = pgcc
CFLAGS_pgcc = -O0 -Minform=inform -Minfo -ta=multicore -g -pg -Mprof=time
CFLAGS = $(CFLAGS_$(CC)) -c
LFLAGS = $(LFLAGS_$(CC)) -L${MKLROOT}/lib/intel64 -lmkl_rt -lpthread -lm -ldl
IFLAGS = $(IFLAGS_$(CC)) -I${MKLROOT}/include

<content is partially neglected>

serial: $(C_OBJ)
        $(CC)  $(IFLAGS) $(CFLAGS) -c msg_ser.c
        $(CC)  $(IFLAGS) -o dplbe $(C_OBJ) msg_ser.o $(LFLAGS)

错误消息:

lbe.o: In function `equilibrium_distrib':
<content is partially neglected>lbe.c:548: undefined reference to `__pgi_uacc_multicorestart'
<content is partially neglected>lbe.c:583: undefined reference to `__pgi_uacc_multicoreend'
makefile:57: recipe for target 'serial' failed
make: *** [serial] Error 2

lbe.c，我仅添加一行作为使用OpenACC的第一步.

lbe.c, to which I only add one line as a babystep to use OpenACC.

#include "header.h"
extern int    max_x, max_y, max_z;
extern int    num_x, x_min, x_max;
extern int    num_proc, n_proc;
extern double tau[2], tau_v[2];

<content is partially neglected>

void equilibrium_distrib(int xy, int z, double ***velcs_df, double dt,
     struct vector forceDen,  struct vector *correctedVel, double *f_eq)
{

<content is partially neglected>

#pragma acc kernels
  {
  for(int q=0; q < 19; q++)
  {
    double term1 = (c_x[q] * correctedVel->x + c_y[q] * correctedVel->y +
                    c_z[q] * correctedVel->z)*3.;
    double term2 = 0.5*term1*term1;
    f_eq[q] = weight[q]*density*(1 + term1 + term2 - term3);
  }
  }
}

将lbe.c编译为lbe.o消息:

compile lbe.c to lbe.o message:

pgcc-Warning--Mprof=time is not supported

PGC-I-0222-Redundant definition for symbol __THROW (/usr/include/x86_64-linux-gnu/sys/cdefs.h: 74)
PGC-I-0222-Redundant definition for symbol __extension__ (/usr/include/x86_64-linux-gnu/sys/cdefs.h: 358)
lbe_zcol:

<content is partially neglected>

equilibrium_distrib:
    558, FMA (fused multiply-add) instruction(s) generated
    559, FMA (fused multiply-add) instruction(s) generated
    560, FMA (fused multiply-add) instruction(s) generated
    565, FMA (fused multiply-add) instruction(s) generated
    566, FMA (fused multiply-add) instruction(s) generated
    567, FMA (fused multiply-add) instruction(s) generated
    573, FMA (fused multiply-add) instruction(s) generated
    577, Loop is parallelizable
         Generating Multicore code
        577, #pragma acc loop gang
    580, FMA (fused multiply-add) instruction(s) generated

推荐答案

非常感谢您的有用提示.我去检查了我的makefile文件，发现它实际上有点混乱或说过时了.旧的makefile中的隐式规则使用的变量"格式不完全正确.这就是pgcc编译器和链接器无法正常工作的原因.

Thank you very much for your useful hint. I went to check my makefile and found out that it is actually a little bit mess up or said out of date. The "Variables Used by Implicit Rules" in the old makefile are not completely in the correct format. It is why the pgcc compiler and linker did not work correctly.

这是我自己写的一个新的makefile，它更加干净整洁.

Here is a new makefile wrote by myself, it is more clean and neat.

CC = pgcc
CFLAGS = -I${MKLROOT}/include -O0 -Minform=inform -Minfo -ta=multicore -g -pg
LDFLAGS = -L${MKLROOT}/lib/intel64
LDLIBS = -lmkl_rt -lpthread -lm -ldl

C_OBJ = main.o driver.o update.o lbe_update.o \
    bnodes.o bnodes_init.o bnodes_dp.o implicit_force.o lbe.o modes_write.o \
    lub.o velcs_update.o hs3d.o n_list.o objects_init.o objects_map.o \
    clusters.o cluster_force.o cluster_update.o cj_grad.o \
    global_sums.o utils.o output.o \
    init_sphere.o ran_num.o get_forces.o verlet_update.o aggregation.o \
    jacobi_eigenvalue.o


clean:
    rm -f *.o dplbe

%.o : %.c
    $(CC) $(CFLAGS) -c $< -o $@ $(LDFLAGS) $(LDLIBS)

serial: $(C_OBJ)
    $(CC) $(CFLAGS) -c msg_ser.c $(LDFLAGS) $(LDLIBS)
    $(CC) $(CFLAGS) -o dplbe $(C_OBJ) msg_ser.o $(LDFLAGS) $(LDLIBS)

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