Error in make during compilation

aaku...@ncsu.edu

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Jan 31, 2019, 2:49:47 PM1/31/19

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Hello Guys,

I am facing the following error when I try to compile.

In file included from /home/akulkarn/projs/esesc/simu/libcore/BPred.cpp:49:0:

/home/akulkarn/projs/esesc/simu/libcore/IMLIBest.h: In member function ‘void IMLIBest::updatePredictor(AddrType, DataSign, bool, bool, AddrType)’:

/home/akulkarn/projs/esesc/simu/libcore/IMLIBest.h:1722:9: error: variable-sized object ‘skip’ may not be initialized

};

^

make[2]: *** [simu/libcore/CMakeFiles/core.dir/BPred.cpp.o] Error 1

make[1]: *** [simu/libcore/CMakeFiles/core.dir/all] Error 2

make: *** [all] Error 2

Could you please help me resolve this?

Thank you,
Aishwarya

aaku...@ncsu.edu

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Jan 31, 2019, 4:09:34 PM1/31/19

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I have attached the place where the error message points to!

Capture1.PNG

aaku...@ncsu.edu

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Jan 31, 2019, 4:29:01 PM1/31/19

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I made this change:

1721 //orig:

1722 //bool skip[nhist] = {

1723 // false,

1724 //};

1725 //new:

1726 bool skip[nhist] ;

1727 skip[0]=false;

1728

I hope that is okay. Kindly correct me if I am wrong.

Jose Renau

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Jan 31, 2019, 4:56:03 PM1/31/19

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The original initializes every entry to false, not just the 1st

Jose Renau

Professor, Computer Science & Engineering

W // http://masc.soe.ucsc.edu

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aaku...@ncsu.edu

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Jan 31, 2019, 5:45:40 PM1/31/19

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I changed a similar issue:

209 //original:

210 //#ifdef HASHED_RECORD

211 // std::map<uint64_t, pipeline_info> window_sign_info;

212 //#elif

213 // std::map<std::string, pipeline_info> window_sign_info;

214 //#endif

215 //changed:

216 #ifdef HASHED_RECORD

217 std::map<uint64_t, pipeline_info> window_sign_info;

218 #elif 1

219 std::map<std::string, pipeline_info> window_sign_info;

220 #endif

The original gave me an error for no condition being provided with elif.

In file included from /home/akulkarn/projs/esesc/simu/libcore/wavesnap.cpp:1:0:

/home/akulkarn/projs/esesc/simu/libcore/wavesnap.h:210:10: error: #elif with no expression

#elif

^

make[2]: *** [simu/libcore/CMakeFiles/core.dir/wavesnap.cpp.o] Error 1

aaku...@ncsu.edu

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Jan 31, 2019, 5:57:07 PM1/31/19

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I tried running a similar code in GDB....the original code only initialized the first element of my array.
I have copy-pasted the code snippet which I ran in GDB:

bool skip[j] = {

true,

};

for(int i=0;i<j;i++){

printf("\n%d",skip[i]);

}
o/p:
1
0
0
0
0

So I believe this only initializes the first element of the array?

On Thursday, January 31, 2019 at 1:56:03 PM UTC-8, Jose Renau wrote:

The original initializes every entry to false, not just the 1st

Jose Renau
Professor, Computer Science & Engineering
W // http://masc.soe.ucsc.edu
On Jan 31 2019, at 1:29 pm, aaku...@ncsu.edu wrote:

I made this change:

1721 //orig:
1722 //bool skip[nhist] = {
1723 // false,
1724 //};
1725 //new:
1726 bool skip[nhist] ;
1727 skip[0]=false;
1728

I hope that is okay. Kindly correct me if I am wrong.

aaku...@ncsu.edu

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Jan 31, 2019, 6:20:18 PM1/31/19

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Also, for the purpose of our code, this will not be a correctness issue since by default all entries of the array are anyway initialized to false. But in the future if they need to be initialized to true, then I believe only the first entry will be initialized to true if we follow the original code.

Jose Renau

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Jan 31, 2019, 6:34:40 PM1/31/19

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my mistake, a bug because it should initialize everything to zero (feel free to create a pull request)

Jose Renau

Professor, Computer Science & Engineering

W // http://masc.soe.ucsc.edu

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