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[libpng16] Corrected Android builds and corrected libpng.vers with symbol

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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.
This commit is contained in:
John Bowler
2013-03-04 16:26:31 -06:00
committed by Glenn Randers-Pehrson
parent e15b537825
commit f3728100d9
14 changed files with 457 additions and 214 deletions
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33
configure.ac
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@@ -233,18 +233,27 @@ AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
AC_ARG_ENABLE([arm-neon],
AS_HELP_STRING([[[--enable-arm-neon]]],
[Enable ARM NEON optimizations: use 'always' to turn off run-time checks]),
[if test "${enableval}" = "yes" -o "${enableval}" = "always"; then
AC_DEFINE([PNG_FILTER_OPTIMIZATIONS],
[png_init_filter_functions_neon],
[ARM NEON filter initialization function])
AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [],
[Align row buffers])
if test "${enableval}" = "always"; then
AC_DEFINE([PNG_NO_ARM_NEON_CHECK], [],
[Turn off run-time checking for ARM NEON support])
fi
fi])
[Enable ARM NEON optimizations: =off, check, api, on:]
[off: disable the optimizations; check: use internal checking code]
[(deprecated and poorly supported); api: disable by default, enable by]
[a call to png_set_option; on: turn on unconditionally. The]
[default is 'on' if __ARM_NEON__ is defined, otherwise 'off'.]),
[case "$enableval" in
off)
AC_DEFINE([PNG_NO_ARM_NEON], [],
[Disable ARM Neon optimizations]);;
check)
AC_DEFINE([PNG_ARM_NEON_CHECK_SUPPORTED], [],
[Check for ARM Neon support at run-time]);;
api)
AC_DEFINE([PNG_ARM_NEON_API_SUPPORTED], [],
[Turn on ARM Neon optimizations at run-time]);;
on)
AC_DEFINE([PNG_ARM_NEON_SUPPORTED], [],
[Enable ARM Neon optimizations]);;
*)
AC_MSG_ERROR([arm-neon: option value required (off/check/api/on)]);;
esac])
AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" != "no"])
AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])