@eliz do you have any thoughts about this?

This bug occurs under win32 when make tries to execute a shell script whose full path contains spaces.

The current code at http://git.savannah.gnu.org/cgit/make.git/tree/src/w32/subproc/sub_proc.c#n1360 construct a command line that is obviously wrong when full_exec_path contains spaces. The shell then searches for a script whose name is the truncation of full_exec_path at its first white space and reports a file-not-found error.

Example: Under MSYS.

$ mkdir "/c/dir with space/"
$ cd "/c/dir with space/"

$ cat > script.sh <<EOF
#!/bin/sh
echo Hello "$@"
EOF

$ cat > Makefile <<EOF
all:
<tab>./script.sh World
EOF

$ make
./script.sh World
sh: c:\dir: No such file or directory
make: * [Makefile:2: all] Error 127

but

$ make SHELLFLAGS='-x -c'
./script.sh World
+ ./script.sh World
Hello World
$