Handle spaces for Python install location in MSVC scripts

Attempting to use an installation path of Python that includes spaces
caused the MSVC builds to fail.  This fixes the issue by using the same
quoting method as ad7595b for OpenSSL.

Author: Victor Wagner
Discussion: https://postgr.es/m/20200430150608.6dc6b8c4@antares.wagner.home
Backpatch-through: 9.5

diff --git a/src/tools/msvc/Mkvcbuild.pm b/src/tools/msvc/Mkvcbuild.pm
index f1e3714512064f23f5ffb74f7a32b042919563a3..f32cee6fb48de6384b259121331f20b723b395cc 100644 (file)
--- a/src/tools/msvc/Mkvcbuild.pm
+++ b/src/tools/msvc/Mkvcbuild.pm
@@ -483,7 +483,7 @@ sub mkvcbuild
        my $pythonprog = "import sys;print(sys.prefix);"
          . "print(str(sys.version_info[0])+str(sys.version_info[1]))";
        my $prefixcmd =
-         $solution->{options}->{python} . "\\python -c \"$pythonprog\"";
+         qq("$solution->{options}->{python}\\python" -c "$pythonprog");
        my $pyout = `$prefixcmd`;
        die "Could not query for python version!\n" if $?;
        my ($pyprefix, $pyver) = split(/\r?\n/, $pyout);