clang does not support -print-multiarch. Therefore we try to
extract the "Target:" line from clang -v.

This was lost in the last commit.

duneproject failed miserably when run with only installed modules. With
this patch we correctly setup the pkg-config and dunecontrol path to
handle this situation. In addition we fixed various issues with the newly
created modules and they now build as exspected.

Some ^[$BLANK] or [^[$BLANK]^'], where $BLANK is space followed by tab
did not work as a capturing statement in some cases (e.g. opts files
with CONFIGURE_FLAGS="CXX='bla'"). After this patch we use [$NOBLANK]
with NOBLANK=^$space^$tab which works. In addition the other patches
form feature/posix-sed-dunecontrol have been backported to close flyspray
1401.

With this patch dunecontrol will work even if the path to the module
contains spaces. Unfortunately, the tests for dune modules will still
not work as I could not figure out how to use quoting in the CPP_FLAGS.

not available in older bash versions.

[[Imported from SVN: r7462]]

this was the other way around.

[[Imported from SVN: r7458]]

[[Imported from SVN: r7457]]

less interference.

[[Imported from SVN: r7456]]

fix incompatibility with mawk

- explicitly state list of whitespaces
- patch by Ansgar Burchardt

[[Imported from SVN: r7452]]

[[Imported from SVN: r7449]]

translating options for provided for configure to CMake syntax.

[[Imported from SVN: r7448]]

At least on Debian CMAKE_INSTALL_LIBDIR is the multiarch libdir.

[[Imported from SVN: r7411]]

Fixes flyspray 1260.
PLEASE REVIEW!


[[Imported from SVN: r7387]]

[[Imported from SVN: r7124]]

[[Imported from SVN: r6988]]

[[Imported from SVN: r6892]]

[[Imported from SVN: r6890]]

improve error message for invalid module names

[[Imported from SVN: r6881]]

[[Imported from SVN: r6873]]

[[Imported from SVN: r6872]]

actually depmode and mainmode where the same... only compute one of them

[[Imported from SVN: r6859]]

only update the module mode if it not DEPS, which is the

[[Imported from SVN: r6858]]

documentation for _search_module

[[Imported from SVN: r6857]]

cleaner eval/test statements

[[Imported from SVN: r6856]]

just search any module (dependencies and suggestions)
and do the splitting of DEPS and SUGS list afterwards
=> make sure a module is not listed twice

[[Imported from SVN: r6855]]

don't stop the dependency tracking if suggestion is missing,
just skip this single entry

[[Imported from SVN: r6851]]

tell the user that we skip a suggestion

[[Imported from SVN: r6850]]

add support to run the dependencies in revers order
(necessarry for "make distclean")

[[Imported from SVN: r6849]]

refactored _check_deps handled missing SUGS as fatal error.
now we just ignore SUSG which are not present or don't match the
required version

[[Imported from SVN: r6848]]