This release adds lots of bugfixes. The bt_pkgflags module has been
added, which provides a replacement for the pkg-config utility (not
compatible). The bt_msg_summary added to bt_config provides a
homogeneous way to output diagnostic messages at the end of the
configuration process. The buildtool(1) manpage has been rewritten,
including a simple user reference so people can easily learn how to
build packages without having to dig into the big manual.
The bt_logic module was added, which parses each call to the compiler and linker and adapts them to the current platform. There is initial support of shared libraries through bt_logic's framework: they can now be built on different platforms, and you can choose between different optional features. The modules bt_install and bt_mkdep were deprecated in favour of bt_logic. Two new subroutine modules were added to bt_config, one to detect the X11 system and another to check for package flags using the pkg-config program. New functions were added to automatically check for sane compilation environments (C and C++).
The distribution documentation was converted to mdoc. The bt_generate_output function was changed to create a helper script that can be used at any time to regenerate any file from substitutions. Buildtool version checking was implemented through BT_REQUIRE. Automatically generated files are now prefixed with bt_ (bt_config.*). Shared library support was disabled by default. Several bugs were fixed, especially in bt_config and bt_lint.
Buildtool's own build system was completely rewritten. A new module was added, bt_install, which provides a portable installation tool to avoid relying on specific system details. A subroutine module was added to bt_config, to check for a pthread implementation. Some new simple checks were also added to bt_config, like bt_check_func (to check for generic functions) and bt_check_type (to check for generic typedefs). Multiple bugs were also fixed.
Some new checks were added to bt_config (like bt_check_bits or bt_check_hdr_std); there were also several fixes to current checks. A new target was added to the main program, called siteconfig, which can be used by third party packages to install Buildtool modules in the right place. The default name of makefiles was changed from Makefile to Makefile.bt to allow Buildtool and other build systems to coexist in the same package. Several portability problems were also fixed, especially in MacOS X (Darwin), Win32 (Cygwin), and Solaris.
