compiled code not showing up on windows

[tdhock]

hi @jimhester first of all thanks for maintaining covr which I find to be a very useful tool for many projects.

On my windows box the compiled code coverage is not showing up on the local report created via

covr::report(covr::package_coverage(type="all"))

This is with https://github.com/tdhock/binsegRcpp -- I only see one file R/binseg_normal.R on the coverage report, and I expected to also see src/binseg_normal.cpp and src/interface.cpp as on codecov e.g. https://coveralls.io/builds/33368011

I do have gcov on the path, is there any other setup that I need to do to get this to work?

> system("gcov --version")
gcov (MinGW.org GCC-6.3.0-1) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or 
FITNESS FOR A PARTICULAR PURPOSE.

[1] 0
> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 17134)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] htmlwidgets_1.5.1 compiler_4.0.2    R6_2.4.1          magrittr_1.5     
 [5] lazyeval_0.2.2    htmltools_0.5.0   tools_4.0.2       rex_1.2.0        
 [9] withr_2.2.0       yaml_2.2.1        DT_0.15           crosstalk_1.1.0.1
[13] jsonlite_1.7.1    digest_0.6.25     covr_3.5.0        rlang_0.4.7      
> str(covr::package_coverage(type="all"))
List of 18
 $ binseg_normal.R:24:3:24:44:3:44:34:34    :List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 24 3 24 44 3 44 34 34
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "binseg_normal"
 $ binseg_normal.R:79:3:79:56:3:56:89:89    :List of 3
  ..$ value    : num 1
  ..$ srcref   : 'srcref' int [1:8] 79 3 79 56 3 56 89 89
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "plot.binseg_normal"
 $ binseg_normal.R:113:5:117:6:5:6:123:127  :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 113 5 117 6 5 6 123 127
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:95:6:99:3:6:3:105:109    :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 95 6 99 3 6 3 105 109
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:94:3:94:22:3:22:104:104  :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 94 3 94 22 3 22 104 104
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:92:3:93:50:3:50:102:103  :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 92 3 93 50 3 50 102 103
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:100:5:102:11:5:11:110:112:List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 100 5 102 11 5 11 110 112
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:112:5:112:51:5:51:122:122:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 112 5 112 51 5 51 122 122
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:25:3:25:4:3:4:35:35      :List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 25 3 25 4 3 4 35 35
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "binseg_normal"
 $ binseg_normal.R:108:5:110:11:5:11:118:120:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 108 5 110 11 5 11 118 120
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:107:5:107:50:5:50:117:117:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 107 5 107 50 5 50 117 117
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:106:5:106:24:5:24:116:116:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 106 5 106 24 5 24 116 116
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:14:3:23:45:3:45:24:33    :List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 14 3 23 45 3 45 24 33
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "binseg_normal"
 $ binseg_normal.R:104:3:118:19:3:19:114:128:List of 3
  ..$ value    : num 2
  ..$ srcref   : 'srcref' int [1:8] 104 3 118 19 3 19 114 128
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:105:5:105:19:5:19:115:115:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 105 5 105 19 5 19 115 115
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:111:5:111:29:5:29:121:121:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 111 5 111 29 5 29 121 121
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:12:3:12:37:3:37:22:22    :List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 12 3 12 37 3 37 22 22
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr [1:2] "binseg_normal" "na"
 $ binseg_normal.R:11:3:11:54:3:54:21:21    :List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 11 3 11 54 3 54 21 21
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b6ac10> 
  ..$ functions: chr "binseg_normal"
 - attr(*, "class")= chr "coverage"
 - attr(*, "package")=List of 14
  ..$ package    : chr "binsegRcpp"
  ..$ type       : chr "Package"
  ..$ title      : chr "Efficient Implementation of Binary Segmentation"
  ..$ version    : chr "2020.9.15"
  ..$ author     : chr "Toby Dylan Hocking"
  ..$ maintainer : chr "Toby Dylan Hocking <[email protected]>"
  ..$ description: chr "Standard template library\ncontainers are used to implement an efficient binary segmentation\nalgorithm, which "| __truncated__
  ..$ license    : chr "GPL-3"
  ..$ linkingto  : chr "Rcpp"
  ..$ url        : chr "https://github.com/tdhock/binseg"
  ..$ bugreports : chr "https://github.com/tdhock/binseg/issues"
  ..$ imports    : chr "data.table, Rcpp"
  ..$ suggests   : chr "ggplot2, testthat"
  ..$ path       : chr "C:/Users/th798/R/binsegRcpp"
 - attr(*, "relative")= logi TRUE
>  

[jimhester]

There shouldn't be anything special you need to do, I will try to look into it and see if I can reproduce the issue on my Windows machine.

[stephematician]

I noticed that covr can't find gcov on my work machine. It uses R 3.6.1 (probably should upgrade) with the usual Rtools. I can find gcov.exe in Rtools/mingw_64/bin/ but in R; Sys.which('gcov') produces nothing, as does getOption('covr.gcov'). So it seems like it just ain't finding/running gcov?

Setting the path via:

options(covr.gcov=normalizePath('blah/blah/blah/Rtools/mingw_64/bin/gcov.exe'))

Worked.

[tdhock]

I was wondering if this would be fixed by #460 which was recently merged into master, so I installed current master, but the problem persists. On my windows machine R can find gcov just fine (that is not the problem either).

> str(covr::package_coverage(type="all"))
List of 18
 $ binseg_normal.R:24:3:24:44:3:44:34:34    :List of 3
  ..$ value    : num 4
  ..$ srcref   : 'srcref' int [1:8] 24 3 24 44 3 44 34 34
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "binseg_normal"
 $ binseg_normal.R:79:3:79:56:3:56:89:89    :List of 3
  ..$ value    : num 1
  ..$ srcref   : 'srcref' int [1:8] 79 3 79 56 3 56 89 89
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "plot.binseg_normal"
 $ binseg_normal.R:113:5:117:6:5:6:123:127  :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 113 5 117 6 5 6 123 127
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:95:6:99:3:6:3:105:109    :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 95 6 99 3 6 3 105 109
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:94:3:94:22:3:22:104:104  :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 94 3 94 22 3 22 104 104
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:92:3:93:50:3:50:102:103  :List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 92 3 93 50 3 50 102 103
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:100:5:102:11:5:11:110:112:List of 3
  ..$ value    : num 3
  ..$ srcref   : 'srcref' int [1:8] 100 5 102 11 5 11 110 112
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:112:5:112:51:5:51:122:122:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 112 5 112 51 5 51 122 122
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:25:3:25:4:3:4:35:35      :List of 3
  ..$ value    : num 4
  ..$ srcref   : 'srcref' int [1:8] 25 3 25 4 3 4 35 35
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "binseg_normal"
 $ binseg_normal.R:108:5:110:11:5:11:118:120:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 108 5 110 11 5 11 118 120
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:107:5:107:50:5:50:117:117:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 107 5 107 50 5 50 117 117
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:106:5:106:24:5:24:116:116:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 106 5 106 24 5 24 116 116
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:14:3:23:45:3:45:24:33    :List of 3
  ..$ value    : num 4
  ..$ srcref   : 'srcref' int [1:8] 14 3 23 45 3 45 24 33
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "binseg_normal"
 $ binseg_normal.R:104:3:118:19:3:19:114:128:List of 3
  ..$ value    : num 2
  ..$ srcref   : 'srcref' int [1:8] 104 3 118 19 3 19 114 128
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:105:5:105:19:5:19:115:115:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 105 5 105 19 5 19 115 115
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:111:5:111:29:5:29:121:121:List of 3
  ..$ value    : num 5
  ..$ srcref   : 'srcref' int [1:8] 111 5 111 29 5 29 121 121
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "coef.binseg_normal"
 $ binseg_normal.R:12:3:12:37:3:37:22:22    :List of 3
  ..$ value    : num 4
  ..$ srcref   : 'srcref' int [1:8] 12 3 12 37 3 37 22 22
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr [1:2] "binseg_normal" "na"
 $ binseg_normal.R:11:3:11:54:3:54:21:21    :List of 3
  ..$ value    : num 4
  ..$ srcref   : 'srcref' int [1:8] 11 3 11 54 3 54 21 21
  .. ..- attr(*, "srcfile")=Classes 'srcfilealias', 'srcfile' <environment: 0x0000000017b55b20> 
  ..$ functions: chr "binseg_normal"
 - attr(*, "class")= chr "coverage"
 - attr(*, "package")=List of 14
  ..$ package    : chr "binsegRcpp"
  ..$ type       : chr "Package"
  ..$ title      : chr "Efficient Implementation of Binary Segmentation"
  ..$ version    : chr "2021.1.6"
  ..$ author     : chr "Toby Dylan Hocking"
  ..$ maintainer : chr "Toby Dylan Hocking <[email protected]>"
  ..$ description: chr "Standard template library\ncontainers are used to implement an efficient binary segmentation\nalgorithm, which "| __truncated__
  ..$ license    : chr "GPL-3"
  ..$ linkingto  : chr "Rcpp"
  ..$ url        : chr "https://github.com/tdhock/binsegRcpp"
  ..$ bugreports : chr "https://github.com/tdhock/binsegRcpp/issues"
  ..$ imports    : chr "data.table, Rcpp"
  ..$ suggests   : chr "ggplot2, testthat"
  ..$ path       : chr "C:/Users/th798/R/binsegRcpp"
 - attr(*, "relative")= logi TRUE
> Sys.which("gcov")
                      gcov 
"C:\\MinGW\\bin\\gcov.exe" 
> devtools::session_info()
- Session info ---------------------------------------------------------------
 setting  value                       
 version  R version 4.0.2 (2020-06-22)
 os       Windows 10 x64              
 system   x86_64, mingw32             
 ui       RTerm                       
 language (EN)                        
 collate  English_United States.1252  
 ctype    English_United States.1252  
 tz       America/Phoenix             
 date     2021-03-09                  

- Packages -------------------------------------------------------------------
 ! package     * version    date       lib source                     
   assertthat    0.2.1      2019-03-21 [1] CRAN (R 4.0.2)             
   backports     1.1.10     2020-09-15 [1] CRAN (R 4.0.2)             
   callr         3.4.4      2020-09-07 [1] CRAN (R 4.0.2)             
   cli           2.0.2      2020-02-28 [1] CRAN (R 4.0.2)             
   covr          3.5.1.9000 2021-03-09 [1] Github (r-lib/covr@db5423f)
 V crayon        1.3.4      2021-02-08 [1] CRAN (R 4.0.4)             
   crosstalk     1.1.0.1    2020-03-13 [1] CRAN (R 4.0.2)             
   curl          4.3        2019-12-02 [1] CRAN (R 4.0.2)             
   desc          1.2.0      2018-05-01 [1] CRAN (R 4.0.2)             
   devtools      2.3.2      2020-09-18 [1] CRAN (R 4.0.2)             
   digest        0.6.27     2020-10-24 [1] CRAN (R 4.0.4)             
   DT            0.15       2020-08-05 [1] CRAN (R 4.0.2)             
   ellipsis      0.3.1      2020-05-15 [1] CRAN (R 4.0.2)             
   fansi         0.4.1      2020-01-08 [1] CRAN (R 4.0.2)             
   fs            1.5.0      2020-07-31 [1] CRAN (R 4.0.2)             
   glue          1.4.2      2020-08-27 [1] CRAN (R 4.0.2)             
   htmltools     0.5.0      2020-06-16 [1] CRAN (R 4.0.2)             
   htmlwidgets   1.5.1      2019-10-08 [1] CRAN (R 4.0.2)             
   jsonlite      1.7.2      2020-12-09 [1] CRAN (R 4.0.4)             
   lazyeval      0.2.2      2019-03-15 [1] CRAN (R 4.0.2)             
   magrittr      1.5        2014-11-22 [1] CRAN (R 4.0.2)             
   memoise       1.1.0      2017-04-21 [1] CRAN (R 4.0.2)             
   pkgbuild      1.1.0      2020-07-13 [1] CRAN (R 4.0.2)             
   pkgload       1.1.0      2020-05-29 [1] CRAN (R 4.0.2)             
   prettyunits   1.1.1      2020-01-24 [1] CRAN (R 4.0.2)             
   processx      3.4.4      2020-09-03 [1] CRAN (R 4.0.2)             
   ps            1.3.4      2020-08-11 [1] CRAN (R 4.0.2)             
   R6            2.5.0      2020-10-28 [1] CRAN (R 4.0.4)             
   remotes       2.2.0      2020-07-21 [1] CRAN (R 4.0.2)             
   rex           1.2.0      2020-04-21 [1] CRAN (R 4.0.2)             
   rlang         0.4.7      2020-07-09 [1] CRAN (R 4.0.2)             
   rprojroot     1.3-2      2018-01-03 [1] CRAN (R 4.0.2)             
   sessioninfo   1.1.1      2018-11-05 [1] CRAN (R 4.0.2)             
   testthat      2.3.2      2020-03-02 [1] CRAN (R 4.0.2)             
   usethis       1.6.3      2020-09-17 [1] CRAN (R 4.0.2)             
 V withr         2.3.0      2021-01-26 [1] CRAN (R 4.0.4)             
   yaml          2.2.1      2020-02-01 [1] CRAN (R 4.0.2)             

[1] C:/Program Files/R/R-4.0.2/library

 V -- Loaded and on-disk version mismatch.
> 

[stephematician]

I was able to get a full report on Windows 10, with R 3.6.1 and covr 3.5.1. Because I was using an older toolchain (Rtools 3.5) I had to add a src/Makevars.win to set the correct C++ standard, but I can't see how this would affect covr. I also have to set covr.gcov because my work machine is a bit messed up ... but ok.

> options(covr.gcov='whatever/Rtools/mingw_64/bin/gcov.exe')
> covr::package_coverage()
binsegRcpp Coverage: 99.31%
R/binseg_normal.R: 97.56%
src/binseg_normal.cpp: 100.00%
src/interface.cpp: 100.00%

Session info in case you are interested:

R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19042)

Matrix products: default

locale:
[1] LC_COLLATE=C                          
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_3.6.1 lazyeval_0.2.2 magrittr_1.5   tools_3.6.1    rex_1.1.2     
[6] withr_2.1.2    crayon_1.3.4   covr_3.5.1 

[stephematician]

Another thing you could check is that package_coverage() actually calls gcov; if the following is FALSE, then that means it should try to run gcov.

covr:::uses_icc()

You could step through covr::package_coverage with debug() to inspect the output from run_gcov (or you could debug(covr:::run_gcov) and see what happens there).

[tdhock]

seems like the problem is that the first gcov on my PATH is "C:/mingw/bin/gcov.exe" which is version 6.3.0 (does not generate gcov files), whereas Rtools gcov is version 8.3.0 (does generate gcov files). So a short term fix is to manually specify the Rtools gcov,

> options(covr.gcov="c:/rtools40/mingw64/bin/gcov.exe")
> setwd("~/R/binsegRcpp")
> covr::package_coverage()
binsegRcpp Coverage: 99.31%
R/binseg_normal.R: 97.56%
src/binseg_normal.cpp: 100.00%
src/interface.cpp: 100.00%
> 

for a longer term / big picture fix, can you please add a warning? I would have expected something like ran gcov version x.y.z but it did not generate any src/*.gcov files; please fix by upgrading to at least gcov a.b.c; manually specify gcov path via options(covr.gcov='path/to/gcov')
What is the minimal version of gcov required?

[stephematician]

Are you sure it's the gcov version, as opposed to, say, a conflict between the gcc/g++ tools used to create the .gcno files (probably from Rtools/mingw_64/bin) and the gcov found in a separate MinGW installation? PATH environment variable shenanigans have tripped me up many a time in Windows in similar ways.

I've added warnings when covr identifies relevant '.gcno' files but obtains no output from 'gcov' because either;

• getOptions('covr.gcov') is empty; or
• for whatever reason the parsed gcov output is empty.

I think this would be useful, although I'm not sure if there would be some cases that the warning might 'annoy' a user (I think they could always adjust their .covrignore so any .gcno that they don't need doesn't get built anyway)

[jimhester]

The gcov version has to match the version you are compiling the package with. If you compile with the R toolchain you need to use the gcov from Rtools.

[jimhester]

Closed by #465

[tdhock]

super thanks!