Build graph lib failed to run weighted_matching_test2.exe on Windows with MSVC

[LinWrSpace]

Issue Description:
Found Boost\libs\graph failed to build due to run weighted_matching_test2.exe on Windows with MSVC, this issue can be reproduced on 6f50c3c commit of Boost master branch. Could you please take a look? Thanks in advance.

Reproduce Steps:

1. git clone -c core.autocrlf=true --recursive ​https://github.com/boostorg/boost.git f:\Boost
2. open a VS 2022 x64 command prompt and browse to f:\Boost
3. .\bootstrap
4. .\b2 headers variant=debug--build-dir=C:\gitP\boostorg\boost\amd64 address-model=64 architecture=x86
5. .\b2 variant=debug--build-dir=C:\gitP\boostorg\boost\amd64 address-model=64 architecture=x86
6. .\b2 -j16 variant=debug --build-dir=C:\gitP\boostorg\boost\amd64 libs\graph\test address-model=64

graph_test.log

ErrorMessage:
...
msvc.link C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test2.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test2.exe
testing.capture-output C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.run
====== BEGIN OUTPUT ======
libs\graph\test\weighted_matching_test.cpp(142): test 'in_file.good()' failed in function 'int __cdecl main(int,char *[])'
1 error detected.

EXIT STATUS: 1
====== END OUTPUT ======
"C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.exe" > "C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.output" 2>&1
set status=%ERRORLEVEL%
echo. >> "C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.output"
echo EXIT STATUS: %status% >> "C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.output"
if %status% EQU 0 (
copy "C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.output" "C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.run" >NUL
)
set verbose=0
if %status% NEQ 0 (
set verbose=1
)
if %verbose% EQU 1 (
echo ====== BEGIN OUTPUT ======
type "C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.output"
echo ====== END OUTPUT ======
)
exit %status%

...failed testing.capture-output C:\gitP\boostorg\boost\amd64\boost\bin.v2\libs\graph\test\weighted_matching_test.test\msvc-14.3\debug\x86_64\threading-multi\weighted_matching_test.run...

[jorisvr]

It looks to me like the problem actually occurs in weighted_matching_test.cpp, not weighted_matching_test2.cpp.
I suspect this test program simply fails to find its input file weighted_matching.dat.

Previous releases of Boost Graph did not automatically run this test. I enabled this test in commit 5fa8626 but it seems that I failed to use the proper mechanism to pass the input file path. That change probably triggered your build failure.

I will confirm and prepare a small pull request to fix the input file path.

[jorisvr]

I verified that this issue is about the location of weighted_matching.dat. The linked pull request should fix it.

FYI, the error is not specific to Windows. It occurs whenever the Boost Graph test suite is invoked while the current working directory is not equal to boost/libs/graph/test.

Thanks for reporting the error.

[jorisvr]

Correction: Previous releases did in fact run this test automatically. But the test would silently exit if it failed to open its input file. I "fixed" that in commit f98edae , thus triggering this issue.