Hi, An automated test of the current libtool HEAD [1] exhibits test failures on mingw (using Cygwin as development environment, not the unreliable MSYS2). On 64-bit mingw: testsuite: 28 29 31 32 34 35 36 37 136 137 138 152 153 154 155 156 157 169 170 failed Find attached the log files. On 32-bit mingw, fewer tests fail: testsuite: 136 137 138 152 153 154 155 156 157 169 170 failed Bruno [1] https://github.com/gnu-libtool/ci-check/actions