Rename `CI_HOST_ARCH` and `CI_HOST_SYSTEM`, to `CI_BUILD_ARCH` and
`CI_BUILD_SYSTEM`, following the nomenclature used by GNU Autotools.
Unfortunately, the word "host" has confusingly opposite meanings in
CMake (and Bazel, etc.) vs. Autotools (and Meson, etc.)
Remove `CI_TARGET_TRIPLET` and `CI_TARGET_ABI` (for now).
Introduce the function `ci_expr` as a fast and easy equivalent of
`expr >/dev/null`.
Rephrase the assertions using an implementation pattern that is more
expressive, yet (arguably) just as readable. Remove `ci_assert`.
Modify the main functions to display more useful information in case
of usage error.
Introduce CI_TARGET_TRIPLET and CI_TARGET_ABI.
Rename CI_HOST_MACHINE and CI_TARGET_MACHINE, respectively, to
CI_HOST_ARCH and CI_TARGET_ARCH, following on the conventional
target triplet nomenclature.
Introduce CI_BUILD_SYSTEM and CI_BUILD_ARCH, following on the
GNU Autotools (host/build/target) practice and nomenclature.
Ensure that CI_TARGET_SYSTEM, CI_TARGET_ARCH and CI_TARGET_ABI
are all initialized when verifying a cross-platform build.
Work around an obscure CMake error by ensuring that CMake variables
(CMAKE_AR and CMAKE_RANLIB) are initialized to the full executable
paths of their CI_* equivalents (CI_AR and CI_RANLIB).
Implement other general-purpose improvements:
* Check all CI_NO_* variables in an arithmetic context, to allow
setting them explicitly to zero in external configurations.
* Label the assertions with descriptions of what's being asserted.
* Add more comments and tracing printouts.
Fix ci_verify_cmake.sh: sync up CI_BUILD_TO_INSTALL_RELDIR with
CI_INSTALL_DIR. (Oopsie!)
Replace slashes, backslashes and dots with underlines in system
names and machine hardware names. These names are now included in
the output directory naming scheme.
Replace CI_SYSTEM_NAME and CI_MACHINE_NAME with CI_HOST_SYSTEM and
CI_HOST_MACHINE, respectively.
Introduce CI_TARGET_SYSTEM and CI_TARGET_MACHINE, defaulting to
CI_HOST_SYSTEM and CI_HOST_MACHINE, respectively.
Use CI_TARGET_SYSTEM and CI_TARGET_MACHINE in the naming scheme of
target build and install directories, in order to allow concurrent
verification builds for multiple cross-platform targets.
Move the common declarations and initializations from ci_verify_*.sh
to ci.lib.sh, and update them as follows:
* Simplify the ci_ function names.
* Refactor the CI_ variable names:
- Add the new variable CI_TOPLEVEL_DIR.
- Rename the variables CI_SCRIPTNAME, CI_SCRIPTDIR, etc.,
to CI_SCRIPT_NAME, CI_SCRIPT_DIR, etc.
- Rename the variables CI_SRCDIR_FROM_BUILDDIR, etc., to
CI_BUILD_TO_SRC_RELDIR, etc.
* Add new functions inside ci.lib.sh:
- Replace ci_err with ci_err_usage, ci_err_fatal, ci_err_internal.
- Add the new functions ci_warn and ci_assert.
* Simplify the ci_ function names inside ci_verify_*.sh.
Apply the following changes:
* Update CI_BUILDDIR and CI_INSTALLDIR to reflect the new script
names.
* Introduce CI_SRCDIR_FROM_BUILDDIR and CI_INSTALLDIR_FROM_BUILDDIR
to the cmake build, to ensure that the Windows tools can handle
native Windows paths correctly when executed via Bash-on-Windows.
* Stop guessing and using CI_SRCDIR_NATIVE and CI_INSTALLDIR_NATIVE
in the cmake build, since we now have a better solution.
* Show the ninja program version in ninja-based cmake builds.
* Move the cleanup of previous builds into separate functions, and
do it in a cleaner manner. No pun intended.
Fix autodetection and use of the cygpath executable on Windows.
Add a new variable CI_CMAKE_TOOLCHAIN_FILE to ci_verify_cmake.sh.
This should help in future cross-platform testing.
Remove the implicit initialization of CI_CC, CI_LD and CI_LIBS from
ci_verify_makefiles.sh. This should help the testing of default values
of their respective make variables (CC, LD and LIBS).
Give the CI scripts new names that better reflect what they do, and
make room for activities such as linting or dependency installation:
* Rename ci_autotools.sh to ci_verify_configure.sh.
* Rename ci_cmake.sh to ci_verify_cmake.sh.
* Rename ci_legacy.sh to ci_verify_makefiles.sh.
Also rename CI_LEGACY_MAKEFILES to CI_MAKEFILES.
Update the config files for Travis CI and AppVeyor CI accordingly.
Apply the following changes:
* Set CI_CMAKE_GENERATOR to "Ninja" by default in ci_cmake.sh.
* Set CI_CC to cc by default in ci_autotools.sh.
* Rename CI_SYSNAME to CI_SYSTEM_NAME; add CI_MACHINE_NAME.
* Apply other minor changes and fixes.
Implement the following updates:
* Add CI_SYSNAME and set it to `uname -s`.
* Set the default CI_CC value to "clang" on all BSD systems.
* Replace CI_SRCDIR_REL_BUILDDIR and CI_INSTALLDIR_REL_BUILDDIR
with CI_SRCDIR_NATIVE and CI_INSTALLDIR_NATIVE.
The former variables were hard-coded and error-prone; the new
variables are computed and safe to use.
The Unix paths in Bash do not mix well with the Windows paths in CMake.
The uppercase and the lowercase environment variables do not mix well
in MSBuild. Et cetera.
On AppVeyor CI, verification of Windows builds with the Visual Studio
toolchain used to work, perhaps due to one or more lucky coincidences,
but it stopped working after an upgrade on the AppVeyor CI site.
Update ci_cmake.sh as follows:
* Use POSIX commands like "mkdir" and "rm" instead of CMake commands
like "make_directory" and "remove_directory".
* Avoid using absolute paths in the CMake command line; use relative
paths that are accessible from both Bash and Windows.
* Clean up incidental mixtures of Windows and Bash-on-Windows
environment variables like {$TEMP,$Temp,$temp} and {$TMP,$Tmp,$tmp}.
For ci_autotools.sh, customize CPP, CPPFLAGS, AR, RANLIB, LD, LDFLAGS
via CI_CPP, CI_CPP_FLAGS, CI_AR, CI_RANLIB, CI_LD, CI_LD_FLAGS.
For ci_cmake.sh and ci_legacy.sh, customize AR, AR_RC and RANLIB via
CI_AR and CI_RANLIB.
Rewrite portions of ci_legacy.sh to match the style of ci_cmake.sh.
Update the ci_*.sh scripts and move them to the more conventional
ci/ directory. Update .appveyor.yml and .travis.yml, as well as
the AUTHORS file, accordingly.
Speed up ci_cmake.sh: add "-DPNG_TESTS=OFF" to the list of CMake
variables if CI_NO_TEST is true.
Remove "sudo: false" from .travis.yml.
Refactor .appveyor.yml.
