sphrayderv 的 debug mode 跟 release mode dtds.out 結果不同

[dyhe83]

sphrayderv 使用 debug, release 兩個模式的計算結果不同：

• dtds.out

[dongying@rhein Downloads]$ diff debug/dtds.out release/dtds.out
Binary files debug/build/dtds.out and release/build/dtds.out differ

• sphrayderv.log

[dongying@rhein Downloads]$ diff debug/sphrayderv.log release/sphrayderv.log
870c870
<                    RMS :      0.4109
---
>                    RMS :      0.4108
880,881c880,881
<  Number of Wavespeed Variables: 3800
<  Degrees of freedom: 3301
---
>  Number of Wavespeed Variables: 3803
>  Degrees of freedom: 3298

[dyhe83]

gcc 編譯時加上 -ffloat-store，可以讓log相同，但是 dtds.out 還是不同。
ref: https://stackoverflow.com/questions/7517588/different-floating-point-result-with-optimization-enabled-compiler-bug

[dyhe83]

造成Debug Release 結果不同的相關連結
https://codeday.me/bug/20170904/67562.html