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ARM NEON code moved to contrib

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This patch contains changes to the build (configure) system and the code
required to support the move.  The patch is provided to isolate the
changes from the others that follow it; the code won't necessarily
compile after this patch (the next changes are required.)

Signed-off-by: John Bowler <jbowler@acm.org>
This commit is contained in:
John Bowler
2015-09-14 17:31:51 -07:00
parent 3bd90db79f
commit ddcca52933
13 changed files with 330 additions and 82 deletions
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56
configure.ac
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@@ -27,7 +27,8 @@ AC_CONFIG_MACRO_DIR([scripts])
# dist-xz requires automake 1.11 or later
# 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
# 1.13 is required for parallel tests
AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules subdir-objects])
# 1.14.1 is required for %reldir% support
AM_INIT_AUTOMAKE([1.14.1 foreign dist-xz color-tests silent-rules subdir-objects])
# The following line causes --disable-maintainer-mode to be the default to
# configure, this is necessary because libpng distributions cannot rely on the
# time stamps of the autotools generated files being correct
@@ -381,54 +382,11 @@ AC_ARG_ENABLE([unversioned-libpng-config],
AM_CONDITIONAL([DO_INSTALL_LIBPNG_CONFIG],
[test "$enable_unversioned_libpng_config" != "no"])
# HOST SPECIFIC OPTIONS
# =====================
#
# ARM
# ===
#
# ARM NEON (SIMD) support.
AC_ARG_ENABLE([arm-neon],
AS_HELP_STRING([[[--enable-arm-neon]]],
[Enable ARM NEON optimizations: =no/off, check, api, yes/on:]
[no/off: disable the optimizations; check: use internal checking code]
[(deprecated and poorly supported); api: disable by default, enable by]
[a call to png_set_option; yes/on: turn on unconditionally.]
[If not specified: determined by the compiler.]),
[case "$enableval" in
no|off)
# disable the default enabling on __ARM_NEON__ systems:
AC_DEFINE([PNG_ARM_NEON_OPT], [0],
[Disable ARM Neon optimizations])
# Prevent inclusion of the assembler files below:
enable_arm_neon=no;;
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]);;
yes|on)
AC_DEFINE([PNG_ARM_NEON_OPT], [2],
[Enable ARM Neon optimizations])
AC_MSG_WARN([--enable-arm-neon: please specify 'check' or 'api', if]
[you want the optimizations unconditionally pass -mfpu=neon]
[to the compiler.]);;
*)
AC_MSG_ERROR([--enable-arm-neon=${enable_arm_neon}: invalid value])
esac])
# Add ARM specific files to all builds where the host_cpu is arm ('arm*') or
# where ARM optimizations were explicitly requested (this allows a fallback if a
# future host CPU does not match 'arm*')
AM_CONDITIONAL([PNG_ARM_NEON],
[test "$enable_arm_neon" != 'no' &&
case "$host_cpu" in
arm*|aarch64*) :;;
*) test "$enable_arm_neon" != '';;
esac])
# EXTENSIONS
# Configure (and all other) support for extensions is included when autoconf is
# run by virtue of the existence (or not) of the following file:
sinclude([contrib/extensions.ac])
AM_CONDITIONAL([LIBPNG_EXTENSIONS],[test -n "$libpng_automake_extensions"])
AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])