CMake doesn't find Visual C++ Express and uses "NMake Makefiles"
generator by default when one calls cmake WITHOUT using the -G options.
Teach CMake to find VC Express to use it as the default generator just
like the commercial versions.
When using the NSIS generator from CPack the file NSIS.template.in is
used to generate a project.nsi file for NSIS to process. The file
consists code in the NSIS scripting language. Among other functions
there is an onInit function the initializes the installer. The function
(tries to) recognise admin and power users but fails since NSIS
scripting language relative includes the jump from the current command
so +3 means "run the third command after this one", so a failed check
for admin completely skips the check for a power user and goes directly
to "done:".
User permission lookup was added in initial NSIS support by commit
a11b9a4c (Merge from CPack branch, 2006-01-01). Later commit b1b052fd
(Several changes to for NSIS, 2006-03-01) added a line inside a block
that should be skipped by a jump without updating the jump length.
Update the jump length to correct the behavior.
If the debug and release libraries are the same (which usually means only one
of them was found) do not output the library as "optimized" and "debug", but
just as one plain library. At the end this means that the Find* output of the
avarage (Un*x) user will be much less cluttered.
Consider the case motivating commit e01cce28 (Allow add_dependencies()
on imported targets, 2010-11-19). An imported target references a file
generated at build time by a custom target on which it depends. Had the
file been built directly using add_library or add_executable its target
name would have been visible globally. Therefore the imported target
representing the file should be globally visible also.
Teach the IMPORTED signature of add_(executable|library) to accept a new
"GLOBAL" option to make the imported target visible globally.
RUBY_VERSION was always set, even if no RUBY_EXECUTABLE was found. While it
may make sense to assume a default version if we can't execute the binary, it
certainly doesn't make sense to report a version if there is no executable at
all.
