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[libng16] Neglected to check in pngconf.h with previous commit.

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Glenn Randers-Pehrson 2013-06-06 14:38:54 -05:00
parent aa22442a9c
commit 0486b17fbd
1 changed files with 25 additions and 1 deletions
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26
pngconf.h
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@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.6.3beta07 - May 12, 2013
* libpng version 1.6.3beta07 - June 6, 2013
*
* Copyright (c) 1998-2013 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@ -194,6 +194,30 @@
* PNG_USE_DLL is set.
*/
/* Compile time options.
* =====================
* In a multi-arch build the compiler may compile the code several times for the
* same object module, producing different codes for different architectures.
* When this happens configure-time setting of the target host options cannot be
* done and this interferes with the handling of the ARM NEON optimizations, and
* possibly other similiar optimizations. Put additional tests here; in general
* this is needed when the same option can be changed at both compile time and
* run time depending on the target OS (i.e. iOS vs Android.)
*/
#ifdef __ARM_NEON__
/* If the default below causes problems set PNG_ARM_NEON_NOT_SUPPORTED either
* by passing --enable-arm-neon=no to configure or setting it in some other
* way when pnglibconf.h is built.
*/
# if (!defined PNG_ARM_NEON_SUPPORTED) && (!defined PNG_ARM_NEON_NOT_SUPPORTED)
# define PNG_ARM_NEON_SUPPORTED
# endif
#endif
#if (defined PNG_ARM_NEON_SUPPORTED) && (defined PNG_ARM_NEON_NOT_SUPPORTED)
# error configuration: ARM_NEON cannot both be supported and disabled
#endif
/* System specific discovery.
* ==========================
* This code is used at build time to find PNG_IMPEXP, the API settings