зеркало из https://github.com/mozilla/mozjpeg.git
117 строки
3.4 KiB
Plaintext
117 строки
3.4 KiB
Plaintext
# -*- Autoconf -*-
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# Process this file with autoconf to produce a configure script.
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AC_PREREQ([2.57])
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AC_INIT([libjpeg], [6.b])
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AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])
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# Always build with prototypes
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AC_DEFINE([HAVE_PROTOTYPES], 1, [Define if your compiler supports prototypes])
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# Don't use undefined types
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AC_DEFINE([INCOMPLETE_TYPES_BROKEN], 1, [Define if you want use complete types])
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# Checks for programs.
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AC_PROG_CPP
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AC_PROG_CC
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AC_PROG_CXX
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AC_PROG_INSTALL
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AC_PROG_LIBTOOL
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AC_PROG_LN_S
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# Checks for libraries.
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# Checks for header files.
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AC_HEADER_STDC
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AC_CHECK_HEADERS([stddef.h stdlib.h string.h])
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AC_CHECK_HEADER([sys/types.h], AC_DEFINE([NEED_SYS_TYPES_H], 1, [Define if you have sys/types.h]))
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# Checks for typedefs, structures, and compiler characteristics.
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AC_C_CONST
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AC_C_CHAR_UNSIGNED
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AC_C_INLINE
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AC_TYPE_SIZE_T
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AC_CHECK_TYPES([unsigned char, unsigned short])
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AC_MSG_CHECKING([if right shift is signed])
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AC_TRY_RUN(
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[#include <stdio.h>
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int is_shifting_signed (long arg) {
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long res = arg >> 4;
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if (res == -0x7F7E80CL)
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return 1; /* right shift is signed */
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/* see if unsigned-shift hack will fix it. */
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/* we can't just test exact value since it depends on width of long... */
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res |= (~0L) << (32-4);
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if (res == -0x7F7E80CL)
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return 0; /* right shift is unsigned */
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printf("Right shift isn't acting as I expect it to.\n");
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printf("I fear the JPEG software will not work at all.\n\n");
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return 0; /* try it with unsigned anyway */
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}
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int main (void) {
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exit(is_shifting_signed(-0x7F7E80B1L));
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}],
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[AC_MSG_RESULT(no)
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AC_DEFINE([RIGHT_SHIFT_IS_UNSIGNED], 1, [Define if shift is unsigned])],
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[AC_MSG_RESULT(yes)],
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[AC_MSG_RESULT(Assuming that right shift is signed on target machine.)])
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# test whether global names are unique to at least 15 chars
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AC_MSG_CHECKING([for short external names])
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AC_TRY_LINK(
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[int possibly_duplicate_function () { return 0; }
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int possibly_dupli_function () { return 1; }], [ ],
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[AC_MSG_RESULT(ok)],
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[AC_MSG_RESULT(short)
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AC_DEFINE([NEED_SHORT_EXTERNAL_NAMES], 1, [Define if you need short function names])])
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# Checks for library functions.
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AC_CHECK_FUNCS([memset memcpy], [],
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[AC_DEFINE([NEED_BSD_STRINGS], 1,
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[Define if you have BSD-like bzero and bcopy])])
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# Set flags to indicate platform
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case "$host_os" in
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cygwin* | mingw* | pw32* | interix*)
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is_win32=1
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;;
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esac
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AM_CONDITIONAL([IS_WIN32], [test "x$is_win32" = "x1"])
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# Check if we're on a supported CPU
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AC_MSG_CHECKING([if we have SIMD optimisations for cpu type])
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case "$host_cpu" in
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x86_64)
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AC_MSG_RESULT([yes (x86_64)])
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AC_PROG_NASM
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simd_arch=x86_64
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;;
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i*86 | x86 | ia32)
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AC_MSG_RESULT([yes (i386)])
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AC_PROG_NASM
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simd_arch=i386
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;;
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*)
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AC_MSG_RESULT([no ("$host_cpu")])
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AC_MSG_ERROR([CPU is not supported])
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;;
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esac
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AC_DEFINE([WITH_SIMD], [1], [Use accelerated SIMD routines.])
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AM_CONDITIONAL([SIMD_I386], [test "x$simd_arch" = "xi386"])
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AM_CONDITIONAL([SIMD_X86_64], [test "x$simd_arch" = "xx86_64"])
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# jconfig.h is the file we use, but we have another before that to
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# fool autoheader. the reason is that we include this header in our
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# API headers, which can screw things up for users of the lib.
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# jconfig.h is a minimal version that allows this package to be built
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_HEADERS([jconfig.h])
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AC_CONFIG_FILES([Makefile simd/Makefile])
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AC_OUTPUT
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