prefixing. This adds an API to set optimization options externally,
providing an alternative and general solution for the non-portable
run-time tests used by the ARM Neon code. It also makes those tests
compile and link on Android. The order of settings vs options in
pnglibconf.h is reversed to allow settings to depend on options and
options can now set (or override) the defaults for settings.
defaults. Previously a return of 0 from a user chunk callback would result in
the chunk being saved (if this was safe, even if the chunk was unsafe-to-copy);
this change respects the defaults set by the application, so unknown chunks
can be discarded by default and known-safe ones preserved.
Allow run-time ARM NEON checking to be disabled. A new configure option:
--enable-arm-neon=always will stop the run-time checks. New checks
within arm/arm_init.c will cause the code not to be compiled unless
__ARM_NEON__ is set. This should make it fail safe (if someone asks
for it on then the build will fail if it can't be done.)
internal 'prefix.h' file can only be generated correctly after pnglibconf.h,
however the dependency was not in Makefile.am. The symptoms are
unpredictable depending on the order make chooses to build pngprefix.h and
pnglibconf.h, often the error goes unnoticed because there is a system
pnglibconf.h to use instead.
being included because the whole of the 'tests' directory is included,
fixed to just include the actual test files and tests/pngstest. Also
reverted the previous erroneous change to remove the ${srcdir} from the
front of contrib, scripts, projects and added an explanation of what is
going on to Makefile.am
the massive speed improvements use a make capable of parallel builds
on a multi-CPU machine and pass the right arguments to make (-j10000
for GNU make) to get the build to run in parallel.
on SUN OS cc 5.9, which demonstrates the tokenization problem previously
avoided by using /lib/cpp. Since all .dfn output is now protected
in double quotes unless it is to be macro substituted the fix should work
everywhere.
by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old GCCs.)
ARM support is enabled by default in zlib.props (unsupported by Microsoft) and
ARM compilation is made possible by deleting the check for x86. The test programs
cannot be run because they are not signed.
