Cross-compile issues due to AC_CHECK_FILE

[mnhauke]

Using AC CHECK_FILE and AC CHECK_FILES results in the following error when cross-compiling:

configure: error: cannot check for file existence when cross compiling

Cross-compiling for Windows from Linux systems via the mingw64 toolchain worked fine before 54533da

Full buildlog:
mingw64-sidplayfp-openSUSE-Tumbleweed-buildlog.txt

[drfiemost]

Reading around it seems a simple test -f would do.
Weird thing is that the automatic build on MinGW64/Windows did work fine...

checking for D:/a/_temp/msys64/mingw64/include/sidplayfp/builders/residfp.h... yes
checking for D:/a/_temp/msys64/mingw64/include/sidplayfp/builders/resid.h... yes
checking for D:/a/_temp/msys64/mingw64/include/sidplayfp/builders/hardsid.h... yes
checking for D:/a/_temp/msys64/mingw64/include/sidplayfp/builders/exsid.h... no

[drfiemost]

@mnhauke can you please check if e11a778 fixes the issue?

[mnhauke]

@mnhauke can you please check if e11a778 fixes the issue?

The issue is gone with these changes. Thanks!

[drfiemost]

Good, thanks