Changes from previous version of pkgconf
========================================

Changes from 1.6.0 to 1.6.1:
----------------------------

* Bug fixes:
  - Fixed an issue where a personality may not be properly selected
    due to argv[0] containing a full path.
  - Fixed a regression where having an empty PKG_CONFIG_LIBDIR
    environment variable would not eliminate the default search
    paths.

Changes from 1.5.4 to 1.6.0:
----------------------------

* Bug fixes:
  - Fixed issue where packages which referenced missing packages in
    Requires.private may have crashed due to memory corruption issues
    in some circumstances.
  - Fixed warnings reported by GCC 8 diagnostics.

* Enhancements:
  - Add LIBPKGCONF_VERSION and LIBPKGCONF_VERSION_STR macros for
    determining libpkgconf version.
  - Add pkgconf_fragment_copy_list() to copy a fragment list to
    another fragment list.

Changes from 1.5.3 to 1.5.4:
----------------------------

* Bug fixes:
  - fix build on Windows with Meson
  - fix edge cases for path canonicalization (especially on Windows)

Changes from 1.5.2 to 1.5.3:
----------------------------

* Security fixes:
  - Fix edge cases involving dequoting zero-length tuples that can lead to a
    buffer overflow under the right circumstances.  Thanks to A. Wilcox for
    reporting and supplying a patch.  (MR 3)

Changes from 1.5.1 to 1.5.2:
----------------------------

* Bug fixes:
  - Ensure environment variables override values learned from personality files
    or built-in defaults.

* Documentation enhancements:
  - Add pkgconf-personality(5) manpage documenting the personality file format.

Changes from 1.5.0 to 1.5.1:
----------------------------

* Bug fixes:
  - fixed a crash with some invalid multi-line .pc files

Changes from 1.4.2 to 1.5.0:
---------------------------

* Administrative:
  - The git repository has moved to <https://git.dereferenced.org/pkgconf/pkgconf>,
    due to the acquisition of GitHub by Microsoft.

* Overall enhancements:
  - pkgconf now supports the proposed Requires.internal pkg-config extension,
    by merging it with the Requires.private list (there is no functional difference
    between the two in our resolver implementation)
  - Support for cross-compilation personalities have been added.  To make use of this
    functionality, create a file in the new personality.d directory that sits inside
    the pkgconfig directory.  The personality file format is described in
    pc-personality(5). (github #166)
  - Support for Haiku has been added, including interpretation of BELIBRARIES and
    other toolchain specifics. (github #180)
  - Testsuite support can be disabled when building with Meson. (github #175)

* Bug fixes:
  - tuples are now appropriately dequoted when added by the parser (github #186).

* Various Windows enhancements:
  - CMake supports building with GCC on Windows. (github #179)
  - Prefix rewriting has been improved. (github #177)
  - PKGCONF_API support has been implemented when building with Meson,
    allowing Meson to be used to build pkgconf on Windows. (github #174)

* Documentation fixes:
  - The manpages have been linted and fixed. (github #181, #182, #183)
  - The description of pkgconf --exists has been corrected. (github #173)

Changes from 1.4.1 to 1.4.2:
----------------------------

* Bug fixes:
  - ensure pkgconf_dependency_t nodes have a solution marked when satisfied
    by an indirect provider (github #172)

Changes from 1.4.0 to 1.4.1:
----------------------------

* Bug fixes:
  - revert some quoting changes because they don't work well with certain
    GCC edge cases (github #168)

* Enhancements:
  - add limited support for --cflags with --msvc-syntax

Changes from 1.3.7 to 1.4.0:
----------------------------

* Notable libpkgconf API changes:
  - pkgconf_pkg_t.requires has been renamed to pkgconf_pkg_t.required for
    C++20 compatibility.

* Enhancements:
  - pkgconf and libpkgconf has been ported to Windows as native binaries.
  - improved compatibility with freedesktop.org pkg-config's ${pc_sysrootdir}
    usage pattern.
  - do not mention PKG_CONFIG_SKIP_CONFLICTS environmental variable when
    simplified errors are requested, as with PKG_CONFIG_PATH.
  - the dependency solver now stores solutions to dependency graph elements
    it visits, allowing for the dependency graph to be incrementally solved.
    this improves dependency solving time by an order of magnitude in most
    cases.
  - new --env option allows for exporting cflags/libs fragments as export
    variables
  - new support for building pkgconf with CMake and Meson
  - improved compiler warning flag detection on autoconf and CMake
  - removed PKGCONF_BUFSIZE allocations from the stack where possible
  - allow for customizing the way fragment lists are rendered using a callback API
  - new support for --msvc-syntax output using the new fragment rendering callbacks
  - fragments are now quoted according to POSIX literal rules
  - new variables on the pkg-config builtin:
    - ${pc_system_includedirs}: the system includedir search path known by pkgconf
    - ${pc_system_libdirs}: the system libdir search path known by pkgconf
  - new manpages:
    - pc(5) describing pkgconf's interpretation of pkg-config .pc files
    - pkg.m4(7) describing the autotools macros bundled with pkgconf

* Bug fixes:
  - fix pkgconf_pkg_t.id generation on native Windows where either \ or / are usable
    as path separator.
  - add missing --modversion to --help output
  - do not evaluate module paths for modules that are not actually on disk
  - ensure we work on a zeroed buffer prior to calling realpath(2) with it
  - fix path deduplication edge case when cache-inodes feature is unavailable
  - fix path rewriting regression with PKG_CONFIG_SYSROOT_DIR when
    PKG_CONFIG_SYSROOT_DIR is set to /
  - fix crash in edge case where a .pc file has misquoting in a fragment list.
  - fix logic edge case when comparing relocated paths

Changes from 1.3.6 to 1.3.7:
----------------------------

* Enhancements:
  - improved diagnostics for malformed packages.

* Bug fixes:
  - reject packages which contain incomplete metadata in post-parse phase.

Changes from 1.3.5 to 1.3.6:
----------------------------

* Enhancements:
  - add many cflags to the protected set: -Wa, -Wl, -Wp, -ansi, -std=, -stdlib=,
    -pedantic, -pthread, -trigraphs, -nostdinc, -nostdlibinc, -nobuiltininc.

* Bug fixes:
  - handle -include cflag fragments properly.

Changes from 1.3.4 to 1.3.5:
----------------------------

* Bug fixes:
  - fix --variable output for compatibility some broken configure scripts when they
    request the same variable from multiple packages

Changes from 1.3.3 to 1.3.4:
----------------------------

* Bug fixes:
  - fix a quoting issue exposed by the Go testsuite

Changes from 1.3.2 to 1.3.3:
----------------------------

* Bug fixes:
  - back out disabling the dependency resolver for single-package queries, it caused
    too many regressions.

* Enhancements:
  - allow explicitly disabling the dependency resolver via new environment variable,
    PKG_CONFIG_MINIMUM_TRAVERSE_DEPTH=1.  while pkgconf could already do this using
    --minimum-traverse-depth=1, other pkg-config implementations do not have this
    option, so adding an environment variable allows to make better use of this
    feature (other implementations won't error due to unknown option this way)

Changes from 1.3.1 to 1.3.2:
----------------------------

* Bug fixes:
  - rewrite handling of --modversion, --print-variables and --variable to not require
    the dependency resolver
  - ensure we disable the dependency resolver in all cases where it is a single-package
    query (1.3.1 did not go far enough)

Changes from 1.3.0 to 1.3.1:
----------------------------

* Features:
  - implement --short-errors

* Bug fixes:
  - only consider a single package at a time with --print-requires, --print-requires-private,
    --print-provides, --modversion, --print-variable and --print-variables

* Enhancements:
  - synchronized latest freedesktop.org changes to pkg.m4
  - improve error reporting with legacy --atleast-version and similar flags.

Changes from 1.2.0 to 1.3.0:
----------------------------

* Features:
  - pkgconf --debug now provides a facility for tracing most relevant libpkgconf operations
  - libpkgconf: add warn and trace handlers for warnings
  - replace realpath() with faster, lighter weight path normalization function (github #112)
  - pkgconf CLI now emulates pkg-config quoting rules precisely, while allowing direct access
    to the actual fragments via libpkgconf

* Bug fixes:
  - pkg: properly separate static and virtual packages so they are not inappropriately
    optimized out of the dependency graph (github #108)
  - argvsplit: do not consider ' and " to have similar rules to escape sequences (github #111)
  - pkg: strip trailing whitespace when parsing .pc files

* Enhancements:
  - argvsplit basically rewritten from scratch
  - many code fixes spotted by coverity
  - add PKG_CONFIG_DONT_RELOCATE_PATHS and --dont-relocate-paths environment variables to
    disable path relocation feature if needed
  - remove extra whitespace that was present for compatibility with older pkg-config releases
    (github #113)

Changes from 1.1.0 to 1.2.0:
----------------------------

* Features:
  - new --path option lists the .pc files which provided the requested dependencies
  - new path relocation API: pkgconf_path_relocate(), which wraps functions such as
    realpath() and cygwin_conv_path().
  - new --with-path option adds a path to the search list
  - new --define-prefix and --dont-define-prefix features enable automatic prefix
    detection for relocatable SDKs.  this is mostly useful on windows.

* Bug fixes:
  - fragments: fix even more edge cases involving token concatenation
  - path lists: don't attempt to collect path inodes if the filter is disabled
  - path lists: explicitly avoid uninitialised data for the path inode cache
  - client: properly handle --keep-system-cflags and --keep-system-libs

* Enhancements:
  - windows: build libpkgconf as a DLL
  - fragments: only munge fragments if sysroot_dir is actually set
  - overall API: resolver flags have been moved to being a client-object setting
    instead of used for every function invocation

Changes from 1.0.1 to 1.1.0:
----------------------------

* Features:
  - new Provides system allows alternate .pc files to provide a dependency
  - stable library API (with documentation): http://pkgconf.readthedocs.io/

* Enhancements:
  - make it possible to programmatically declare dependencies instead of just using the parser
  - testsuite migrated to run under kyua
  - provide a libpkgconf.pc file for consumers to use
  - pkgconf client: new --pure flag to enable dependency graph optimization in --static mode
  - significant .pc parser speedups using bsearch(3).
  - handle -idirafter in the same way as -isystem CFLAGS
  - learn toolchain "system" paths from GCC environment variables, if present
  - filter duplicate PKG_CONFIG_PATH (and other) entries by inode

* Bug fixes:
  - fragments: fix another edge case involving empty tokens being concatenated onto previous tokens
    (github #99)
  - libpkgconf: remove dependencies on config.h in public headers

Changes from 1.0.0 to 1.0.1:
----------------------------

* Enhancements:
  - new stub implementation of --print-provides (github #95)

* Bug fixes:
  - fragments: fix an edge case involving path-only fragments and PKG_CONFIG_SYSROOT_DIR (github #94)

Changes from 0.9.12 to 1.0.0:
-----------------------------

* Features:
  - new library: libpkgconf

* Enhancements:
  - testsuite: use an explicit prefix on all tests
  - build: switch to automake

* Bug fixes:
  - cast all usage of ctype(3) functions
  - do not expand variables passed via --define-variable for compatibility with pkg-config 0.29
  - let the CFLAGS being user settable

Changes from 0.9.11 to 0.9.12:
------------------------------

* Features:
  - add --list-package-names

* Enhancements:
  - ensure -I and -L are never pushed back

* Bug fixes:
  - fix implicit conversion warnings with variables over 31bits

Changes from 0.9.10 to 0.9.11:
------------------------------

* Features:
  - add --validate

* Enhancements:
  - add large file support checks in autoconf

* Bug fixes:
  - fix private lib deduplication
  - handle --static correctly in some more esoteric scenarios

Changes from 0.9.9 to 0.9.10:
-----------------------------

* Features:

* Enhancements:

* Bug fixes:
  - Fix parser when dealing with commented lines

Changes from 0.9.8 to 0.9.9:
----------------------------

* Features:
  - add a sub out --print-provides

* Enhancements:

* Bug fixes:
  - Fix parser when dealing with comments in fields

Changes from 0.9.7 to 0.9.8:
----------------------------

* Features:

* Enhancements:
  - Convert manpages to mdoc(7)

* Bug fixes:
  - Fix parsing multiline fields

Changes from 0.9.6 to 0.9.7:
----------------------------

* Features:

* Enhancements:
  - Convert manpages to mdoc(7)

* Bug fixes:
  - Fix parsing multiline fields

Changes from 0.9.5 to 0.9.6:
----------------------------

* Features:
  - add a sub --debug

* Enhancements:
  - Do not hardcode non-posix install(1)

* Bug fixes:
  - fix --with-system-includedir and --with-system-libdir behaviour

Changes from 0.9.4 to 0.9.5:
----------------------------

* Features:

* Enhancements:
  - Make all variables but CFLAGS and LIBS case sensitive

* Bug fixes:

Changes from 0.9.3 to 0.9.4:
----------------------------

* Features:
  - Add a pkgconf(1) manpage

* Enhancements:
  - Improve support for MacOS -framework

* Bug fixes:

Changes from 0.9.2 to 0.9.3:
----------------------------

* Features:
  - Add support for CFLAGS.private

* Enhancements:
  - Support out of source build
  - Improved private libs deduplication

* Bug fixes:

Changes from 0.9.1 to 0.9.2:
----------------------------

* Features:

* Enhancements:

* Bug fixes:
  - Fix PKG_CONFIG_PATH being ignored when a .pc is directly supplied from
    command line

Changes from 0.9.0 to 0.9.1:
----------------------------

* Features:

* Enhancements:
  - --simulate: print depgraph operations
  - --simulate: print bytecode program as a human-readable AST

* Bug fixes:
  - reset parser state on new package atom

Changes from 0.8.12 to 0.9.0:
----------------------------

* Features:

* Enhancements:
  - Rework the internal cache API
  - Rework the internal code to use the new pkg_list_t framework
  - Rework PKG_CONFIG_PATH handling code

* Bug fixes:
  - fix multi-recursion with -framework