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|
dnl $Id$
dnl Process this file with autoconf to produce a configure script.
dnl
dnl Copyright 2016-2017 Karl Berry <tex-live@tug.org>
dnl Copyright 2009-2015 Peter Breitenlohner <tex-live@tug.org>
dnl
dnl This file is free software; the copyright holder
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl
m4_include([version.ac])[] dnl define libpng_version
AC_INIT([libpng (TeX Live)], libpng_version, [tex-k@tug.org])
AC_PREREQ([2.65])
AC_CONFIG_SRCDIR([libpng-src/pngget.c])
AC_CONFIG_AUX_DIR([../../build-aux])
AC_CONFIG_MACRO_DIR([../../m4])
KPSE_BASIC([libpng])
AC_CONFIG_HEADERS([config.h])
AC_PROG_CC
AM_PROG_AS
AC_PROG_RANLIB
AC_PROG_LN_S
KPSE_COMPILER_VISIBILITY
# For GCC 5 the default mode for C is -std=gnu11 instead of -std=gnu89
# In pngpriv.h we request just the POSIX 1003.1 and C89 APIs by defining _POSIX_SOURCE to 1
# This is incompatible with the new default mode, so we test for that and force the
# "-std=c89" compiler option:
AC_MSG_CHECKING([if we need to force back C standard to C89])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([
[#define _POSIX_SOURCE 1]
[#include <stdio.h>]
])],
AC_MSG_RESULT(no),[
if test "x$GCC" != "xyes"; then
AC_MSG_ERROR(
[Forcing back to C89 is required but the flags are only known for GCC])
fi
AC_MSG_RESULT(yes)
CFLAGS="$CFLAGS -std=c89"
])
# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
AC_STRUCT_TM
AC_C_RESTRICT
# Checks for library functions.
AC_FUNC_STRTOD
AC_CHECK_FUNCS([memset], , [AC_ERROR([memset not found in libc])])
AC_SEARCH_LIBS([pow], [m], , [AC_ERROR([cannot find pow])])
KPSE_ZLIB_FLAGS
AM_CONDITIONAL([build], [test "x$enable_build" != xno])
if test "x$enable_build" != xno || test -f config.force; then
KPSE_ADD_FLAGS([zlib])
AC_CHECK_FUNC([zlibVersion], , [AC_ERROR([zlib not found])])
KPSE_RESTORE_FLAGS
echo timestamp >config.force
fi
AC_SUBST([LIBPNG_TREE], [libpng-src])
AC_SUBST([LIBPNG_DEFINES], ['-DPNG_CONFIGURE_LIBPNG -DPNG_NO_MMX_CODE'])
# emacs-page
# 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])
AC_CONFIG_FILES([Makefile include/Makefile])
AC_OUTPUT
|
