LO build failure in Windows 10 (No C-89 compiler found in libassuan part)

[Jan-Marek Glogowski]

Am 27.12.21 um 18:30 schrieb Julien Nabet:
> On Win10, I updated my local repo after some weeks and it fails with:

And you updated Cygwin...

> checking how to run the C preprocessor... 
> C:/cygwin/home/serva/lode/dev/core/workdir/LinkTarget/Executable/gcc-wrapper.exe 
> -E
> configure: error: No C-89 compiler found
> make[1]: *** 
> [C:/cygwin/home/serva/lode/dev/core/external/libassuan/ExternalProject_libassuan.mk:26: 
> C:/cygwin/home/serva/lode/dev/core/workdir/ExternalProject/libassuan/build] 
> Error 1
> make: *** [Makefile:291: build] Error 2

Cygwin updated the default to autoconf 2.70+. Workaround: uninstall the 
autoconf2.7 package and install the autoconf2.5 (2.69) package and 
downgrade the meta-package. AFAIK --disable-gpgmepp also works, but I 
didn't test.