AC_INIT([libwebp], [1.0.0],
[https://bugs.chromium.org/p/webp],,
[http://developers.google.com/speed/webp])
AC_CANONICAL_HOST
AC_PREREQ([2.60])
AM_INIT_AUTOMAKE([-Wall foreign subdir-objects])
dnl === automake >= 1.12 requires this for 'unusual archivers' support.
dnl === it must occur before LT_INIT (AC_PROG_LIBTOOL).
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_PROG_LIBTOOL
AC_PROG_SED
AM_PROG_CC_C_O
dnl === Enable less verbose output when building.
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
dnl == test endianness
AC_C_BIGENDIAN
dnl === SET_IF_UNSET(shell_var, value)
dnl === Set the shell variable 'shell_var' to 'value' if it is unset.
AC_DEFUN([SET_IF_UNSET], [test "${$1+set}" = "set" || $1=$2])
AC_ARG_ENABLE([everything],
AS_HELP_STRING([--enable-everything],
[Enable all optional targets. These can still be
disabled with --disable-target]),
[SET_IF_UNSET([enable_libwebpdecoder], [$enableval])
SET_IF_UNSET([enable_libwebpdemux], [$enableval])
SET_IF_UNSET([enable_libwebpextras], [$enableval])
SET_IF_UNSET([enable_libwebpmux], [$enableval])])
dnl === If --enable-asserts is not defined, define NDEBUG
AC_MSG_CHECKING(whether asserts are enabled)
AC_ARG_ENABLE([asserts],
AS_HELP_STRING([--enable-asserts],
[Enable assert checks]))
if test "x${enable_asserts-no}" = "xno"; then
AM_CPPFLAGS="${AM_CPPFLAGS} -DNDEBUG"
fi
AC_MSG_RESULT(${enable_asserts-no})
AC_SUBST([AM_CPPFLAGS])
AC_ARG_WITH([pkgconfigdir], AS_HELP_STRING([--with-pkgconfigdir=DIR],
[Path to the pkgconfig directory @<:@LIBDIR/pkgconfig@:>@]),
[pkgconfigdir="$withval"], [pkgconfigdir='${libdir}/pkgconfig'])
AC_SUBST([pkgconfigdir])
dnl === TEST_AND_ADD_CFLAGS(var, flag)
dnl === Checks whether $CC supports 'flag' and adds it to 'var'
dnl === on success.
AC_DEFUN([TEST_AND_ADD_CFLAGS],
[SAVED_CFLAGS="$CFLAGS"
CFLAGS="-Werror $2"
AC_MSG_CHECKING([whether $CC supports $2])
dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition.
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; }])],
[AC_MSG_RESULT([yes])]
dnl Simply append the variable avoiding a
dnl compatibility ifdef for AS_VAR_APPEND as this
dnl variable shouldn't grow all that large.
[$1="${$1} $2"],
[AC_MSG_RESULT([no])])
CFLAGS="$SAVED_CFLAGS"])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-fvisibility=hidden])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wall])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wconstant-conversion])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wdeclaration-after-statement])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wextra])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wfloat-conversion])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat -Wformat-nonliteral])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wformat -Wformat-security])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-declarations])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wmissing-prototypes])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wold-style-definition])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wparentheses-equality])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshadow])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshorten-64-to-32])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wundef])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunreachable-code])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused-but-set-variable])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wunused])
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wvla])
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62040
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61622
AS_IF([test "$GCC" = "yes" ], [
gcc_version=`$CC -dumpversion`
gcc_wht_bug=""
case "$host_cpu" in
aarch64|arm64)
case "$gcc_version" in
4.9|4.9.0|4.9.1) gcc_wht_bug=yes ;;
esac
esac
AS_IF([test "$gcc_wht_bug" = "yes"], [
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-frename-registers])])])
# Use -flax-vector-conversions, if available, when building intrinsics with
# older versions of gcc. The flag appeared in 4.3.x, but if backported, and
# -fno-lax-vector-conversions is set, errors may occur with the intrinsics
# files along with the older system includes, e.g., emmintrin.h.
# Originally observed with cc (GCC) 4.2.1 20070831 patched [FreeBSD] (9.3).
# https://bugs.chromium.org/p/webp/issues/detail?id=274
AS_IF([test "$GCC" = "yes" ], [
case "$host_cpu" in
amd64|i?86|x86_64)
AC_COMPILE_IFELSE(
dnl only check for -flax-vector-conversions with older gcc, skip
dnl clang as it reports itself as 4.2.1, but the flag isn't needed.
[AC_LANG_SOURCE([#if !defined(__clang__) && defined(__GNUC__) && \
((__GNUC__ << 8) | __GNUC_MINOR__) < 0x403
#error old gcc
#endif
int main(void) { return 0; }
])],,
[TEST_AND_ADD_CFLAGS([INTRINSICS_CFLAGS],
[-flax-vector-conversions])])
;;
esac])
AC_SUBST([AM_CFLAGS])
dnl === Check for machine specific flags
AC_ARG_ENABLE([avx2],
AS_HELP_STRING([--disable-avx2],
[Disable detection of AVX2 support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_avx2" != "xno" -a "x$enable_sse4_1" != "xno" \
-a "x$enable_sse2" != "xno"], [
AVX2_CFLAGS="$INTRINSICS_CFLAGS $AVX2_FLAGS"
TEST_AND_ADD_CFLAGS([AVX2_FLAGS], [-mavx2])
AS_IF([test -n "$AVX2_FLAGS"], [
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $AVX2_FLAGS"
AC_CHECK_HEADER([immintrin.h],
[AC_DEFINE(WEBP_HAVE_AVX2, [1],
[Set to 1 if AVX2 is supported])],
[AVX2_FLAGS=""],
dnl it's illegal to directly include avx2intrin.h, but it's
dnl included conditionally in immintrin.h, tricky!
[#ifndef __AVX2__
#error avx2 is not enabled
#endif
])
CFLAGS=$SAVED_CFLAGS])
AC_SUBST([AVX2_FLAGS])])
AC_ARG_ENABLE([sse4.1],
AS_HELP_STRING([--disable-sse4.1],
[Disable detection of SSE4.1 support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_sse4_1" != "xno" -a "x$enable_sse2" != "xno"], [
SSE41_FLAGS="$INTRINSICS_CFLAGS $SSE41_FLAGS"
TEST_AND_ADD_CFLAGS([SSE41_FLAGS], [-msse4.1])
AS_IF([test -n "$SSE41_FLAGS"], [
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $SSE41_FLAGS"
AC_CHECK_HEADER([smmintrin.h],
[AC_DEFINE(WEBP_HAVE_SSE41, [1],
[Set to 1 if SSE4.1 is supported])],
[SSE41_FLAGS=""])
CFLAGS=$SAVED_CFLAGS])
AC_SUBST([SSE41_FLAGS])])
AC_ARG_ENABLE([sse2],
AS_HELP_STRING([--disable-sse2],
[Disable detection of SSE2 support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_sse2" != "xno"], [
SSE2_FLAGS="$INTRINSICS_CFLAGS $SSE2_FLAGS"
TEST_AND_ADD_CFLAGS([SSE2_FLAGS], [-msse2])
AS_IF([test -n "$SSE2_FLAGS"], [
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $SSE2_FLAGS"
AC_CHECK_HEADER([emmintrin.h],
[AC_DEFINE(WEBP_HAVE_SSE2, [1],
[Set to 1 if SSE2 is supported])],
[SSE2_FLAGS=""])
CFLAGS=$SAVED_CFLAGS])
AC_SUBST([SSE2_FLAGS])])
AC_ARG_ENABLE([neon],
AS_HELP_STRING([--disable-neon],
[Disable detection of NEON support
@<:@default=auto@:>@]))
AC_ARG_ENABLE([neon_rtcd],
AS_HELP_STRING([--disable-neon-rtcd],
[Disable runtime detection of NEON support via
/proc/cpuinfo on Linux hosts
@<:@default=auto@:>@]))
# For ARM(7) hosts:
# Both NEON flags unset and NEON support detected = build all modules with NEON
# NEON detected with the use of -mfpu=neon = build only NEON modules with NEON
AS_IF([test "x$enable_neon" != "xno"], [
case "$host_cpu" in
arm|armv7*)
# Test for NEON support without flags before falling back to -mfpu=neon
for flag in '' '-mfpu=neon'; do
LOCAL_NEON_FLAGS="$INTRINSICS_CFLAGS $NEON_FLAGS"
TEST_AND_ADD_CFLAGS([LOCAL_NEON_FLAGS], [$flag])
SAVED_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $LOCAL_NEON_FLAGS"
dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition.
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#include <arm_neon.h>
int main(void) {
int8x8_t v = vdup_n_s8(0);
(void)v;
return 0;
}])],
[NEON_FLAGS="$(echo $LOCAL_NEON_FLAGS | $SED 's/^ *//')"
AS_IF([test -n "$NEON_FLAGS"], [
AS_IF([test "${host_os%%-*}" = "linux" -o \
"x$enable_neon_rtcd" = "xno"], [
CFLAGS=$SAVED_CFLAGS
AC_DEFINE(WEBP_HAVE_NEON, [1], [Set to 1 if NEON is supported])
break
],[
AC_MSG_WARN(m4_normalize([NEON runtime cpu-detection is
unavailable for ${host_os%%-*}. Force
with CFLAGS=-mfpu=neon or
--disable-neon-rtcd.]))
enable_neon_rtcd=no
NEON_FLAGS=""
])
],[
CFLAGS=$SAVED_CFLAGS
AC_DEFINE(WEBP_HAVE_NEON, [1], [Set to 1 if NEON is supported])
break
])])
CFLAGS=$SAVED_CFLAGS
done
AS_IF([test -n "$NEON_FLAGS"], [
# If NEON is available and rtcd is disabled apply NEON_FLAGS globally.
AS_IF([test "x$enable_neon_rtcd" = "xno"], [
AM_CFLAGS="$AM_CFLAGS $NEON_FLAGS"
NEON_FLAGS=""],
[AC_DEFINE(WEBP_HAVE_NEON_RTCD, [1],
[Set to 1 if runtime detection of NEON is enabled])])])
case "$host_os" in
*android*) AC_CHECK_HEADERS([cpu-features.h]) ;;
esac
;;
esac
AC_SUBST([NEON_FLAGS])])
dnl === CLEAR_LIBVARS([var_pfx])
dnl === Clears <var_pfx>_{INCLUDES,LIBS}.
AC_DEFUN([CLEAR_LIBVARS], [$1_INCLUDES=""; $1_LIBS=""])
dnl === WITHLIB_OPTION([opt_pfx], [outvar_pfx])
dnl === Defines --with-<opt_pfx>{include,lib}dir options which set
dnl === the variables <outvar_pfx>_{INCLUDES,LIBS}.
AC_DEFUN([WITHLIB_OPTION],
[AC_ARG_WITH([$1includedir],
AS_HELP_STRING([--with-$1includedir=DIR],
[use $2 includes from DIR]),
$2_INCLUDES="-I$withval")
AC_ARG_WITH([$1libdir],
AS_HELP_STRING([--with-$1libdir=DIR],
[use $2 libraries from DIR]),
[$2_LIBS="-L$withval"])])
dnl === LIBCHECK_PROLOGUE([var_pfx])
dnl === Caches the current values of CPPFLAGS/LIBS in SAVED_* then
dnl === prepends the current values with <var_pfx>_{INCLUDES,LIBS}.
AC_DEFUN([LIBCHECK_PROLOGUE],
[SAVED_CPPFLAGS=$CPPFLAGS
SAVED_LIBS=$LIBS
CPPFLAGS="$$1_INCLUDES $CPPFLAGS"
LIBS="$$1_LIBS $LIBS"])
dnl === LIBCHECK_EPILOGUE([var_pfx])
dnl === Restores the values of CPPFLAGS/LIBS from SAVED_* and exports
dnl === <var_pfx>_{INCLUDES,LIBS} with AC_SUBST.
AC_DEFUN([LIBCHECK_EPILOGUE],
[AC_SUBST($1_LIBS)
AC_SUBST($1_INCLUDES)
CPPFLAGS=$SAVED_CPPFLAGS
LIBS=$SAVED_LIBS])
dnl === Check for gcc builtins
dnl === CHECK_FOR_BUILTIN([builtin], [param], [define])
dnl === links a C AC_LANG_PROGRAM, with <builtin>(<param>)
dnl === AC_DEFINE'ing <define> if successful.
AC_DEFUN([CHECK_FOR_BUILTIN],
[AC_LANG_PUSH([C])
AC_MSG_CHECKING([for $1])
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [(void)$1($2)])],
[AC_MSG_RESULT([yes])
AC_DEFINE([$3], [1],
[Set to 1 if $1 is available])],
[AC_MSG_RESULT([no])]),
AC_LANG_POP])
dnl AC_CHECK_FUNC doesn't work with builtin's.
CHECK_FOR_BUILTIN([__builtin_bswap16], [1u << 15], [HAVE_BUILTIN_BSWAP16])
CHECK_FOR_BUILTIN([__builtin_bswap32], [1u << 31], [HAVE_BUILTIN_BSWAP32])
CHECK_FOR_BUILTIN([__builtin_bswap64], [1ull << 63], [HAVE_BUILTIN_BSWAP64])
dnl === Check for pthread support
AC_ARG_ENABLE([threading],
AS_HELP_STRING([--disable-threading],
[Disable detection of thread support]),,
[enable_threading=yes])
if test "$enable_threading" = "yes"; then
AC_MSG_NOTICE([checking for threading support...])
AX_PTHREAD([AC_DEFINE([WEBP_USE_THREAD], [1],
[Undefine this to disable thread support.])
LIBS="$PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
CC="$PTHREAD_CC"
],
[AC_CHECK_FUNC([_beginthreadex],
[AC_DEFINE([WEBP_USE_THREAD], [1],
[Undefine this to disable thread
support.])],
[enable_threading=no])])
fi
AC_MSG_NOTICE([checking if threading is enabled... ${enable_threading-no}])
dnl === check for OpenGL/GLUT support ===
AC_ARG_ENABLE([gl], AS_HELP_STRING([--disable-gl],
[Disable detection of OpenGL support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_gl" != "xno"], [
CLEAR_LIBVARS([GL])
WITHLIB_OPTION([gl], [GL])
LIBCHECK_PROLOGUE([GL])
glut_cflags="none"
glut_ldflags="none"
case $host_os in
darwin*)
# Special case for OSX builds. Append these to give the user a chance to
# override with --with-gl*
glut_cflags="$glut_cflags|-framework GLUT -framework OpenGL"
glut_ldflags="$glut_ldflags|-framework GLUT -framework OpenGL"
# quiet deprecation warnings for glut
TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wno-deprecated-declarations])
;;
esac
GLUT_SAVED_CPPFLAGS="$CPPFLAGS"
SAVED_IFS="$IFS"
IFS="|"
for flag in $glut_cflags; do
# restore IFS immediately as the autoconf macros may need the default.
IFS="$SAVED_IFS"
unset ac_cv_header_GL_glut_h
unset ac_cv_header_OpenGL_glut_h
case $flag in
none) ;;
*) CPPFLAGS="$flag $CPPFLAGS";;
esac
AC_CHECK_HEADERS([GL/glut.h GLUT/glut.h OpenGL/glut.h],
[glut_headers=yes;
test "$flag" = "none" || GL_INCLUDES="$CPPFLAGS";
break])
CPPFLAGS="$GLUT_SAVED_CPPFLAGS"
test "$glut_headers" = "yes" && break
done
IFS="$SAVED_IFS"
if test "$glut_headers" = "yes"; then
AC_LANG_PUSH([C])
GLUT_SAVED_LDFLAGS="$LDFLAGS"
SAVED_IFS="$IFS"
IFS="|"
for flag in $glut_ldflags; do
# restore IFS immediately as the autoconf macros may need the default.
IFS="$SAVED_IFS"
unset ac_cv_search_glBegin
case $flag in
none) ;;
*) LDFLAGS="$flag $LDFLAGS";;
esac
# find libGL
GL_SAVED_LIBS="$LIBS"
AC_SEARCH_LIBS([glBegin], [GL OpenGL opengl32])
LIBS="$GL_SAVED_LIBS"
# A direct link to libGL may not be necessary on e.g., linux.
GLUT_SAVED_LIBS="$LIBS"
for lib in "" "-lglut" "-lglut $ac_cv_search_glBegin"; do
LIBS="$lib"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([
#ifdef __cplusplus
# define EXTERN_C extern "C"
#else
# define EXTERN_C
#endif
EXTERN_C char glOrtho();
EXTERN_C char glutMainLoop();
],[
glOrtho();
glutMainLoop();
])
],
AC_DEFINE(WEBP_HAVE_GL, [1],
[Set to 1 if OpenGL is supported])
[glut_support=yes], []
)
if test "$glut_support" = "yes"; then
GL_LIBS="$LDFLAGS $lib"
break
fi
done
LIBS="$GLUT_SAVED_LIBS"
LDFLAGS="$GLUT_SAVED_LDFLAGS"
test "$glut_support" = "yes" && break
done
IFS="$SAVED_IFS"
AC_LANG_POP
fi
LIBCHECK_EPILOGUE([GL])
if test "$glut_support" = "yes" -a "$enable_libwebpdemux" = "yes"; then
build_vwebp=yes
fi
])
AM_CONDITIONAL([BUILD_VWEBP], [test "$build_vwebp" = "yes"])
dnl === check for SDL support ===
AC_ARG_ENABLE([sdl],
AS_HELP_STRING([--disable-sdl],
[Disable detection of SDL support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_sdl" != "xno"], [
CLEAR_LIBVARS([SDL])
AC_PATH_PROGS([LIBSDL_CONFIG], [sdl-config])
if test -n "$LIBSDL_CONFIG"; then
SDL_INCLUDES=`$LIBSDL_CONFIG --cflags`
SDL_LIBS="`$LIBSDL_CONFIG --libs`"
fi
WITHLIB_OPTION([sdl], [SDL])
sdl_header="no"
LIBCHECK_PROLOGUE([SDL])
AC_CHECK_HEADER([SDL/SDL.h], [sdl_header="SDL/SDL.h"],
[AC_CHECK_HEADER([SDL.h], [sdl_header="SDL.h"],
[AC_MSG_WARN(SDL library not available - no sdl.h)])])
if test x"$sdl_header" != "xno"; then
AC_LANG_PUSH(C)
SDL_SAVED_LIBS="$LIBS"
for lib in "" "-lSDL" "-lSDLmain -lSDL"; do
LIBS="$SDL_SAVED_LIBS $lib"
# Perform a full link to ensure SDL_main is resolved if needed.
AC_LINK_IFELSE(
[AC_LANG_SOURCE([
#include <$sdl_header>
int main(int argc, char** argv) {
SDL_Init(0);
return 0;
}])],
[SDL_LIBS="$LDFLAGS $LIBS"
SDL_INCLUDES="$SDL_INCLUDES -DWEBP_HAVE_SDL"
AC_DEFINE(WEBP_HAVE_SDL, [1],
[Set to 1 if SDL library is installed])
sdl_support=yes]
)
if test x"$sdl_support" = "xyes"; then
break
fi
done
# LIBS is restored by LIBCHECK_EPILOGUE
AC_LANG_POP
if test x"$sdl_header" = "xSDL.h"; then
SDL_INCLUDES="$SDL_INCLUDES -DWEBP_HAVE_JUST_SDL_H"
fi
fi
LIBCHECK_EPILOGUE([SDL])
if test x"$sdl_support" = "xyes"; then
build_vwebp_sdl=yes
else
AC_MSG_WARN(Optional SDL library not found)
fi
])
AM_CONDITIONAL([BUILD_VWEBP_SDL], [test "$build_vwebp_sdl" = "yes"])
dnl === check for PNG support ===
AC_ARG_ENABLE([png], AS_HELP_STRING([--disable-png],
[Disable detection of PNG format support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_png" != "xno"], [
CLEAR_LIBVARS([PNG])
AC_PATH_PROGS([LIBPNG_CONFIG],
[libpng-config libpng16-config libpng15-config libpng14-config \
libpng12-config])
if test -n "$LIBPNG_CONFIG"; then
PNG_INCLUDES=`$LIBPNG_CONFIG --cflags`
PNG_LIBS="`$LIBPNG_CONFIG --ldflags`"
fi
WITHLIB_OPTION([png], [PNG])
LIBCHECK_PROLOGUE([PNG])
AC_CHECK_HEADER(png.h,
AC_SEARCH_LIBS(png_get_libpng_ver, [png],
[test "$ac_cv_search_png_get_libpng_ver" = "none required" \
|| PNG_LIBS="$PNG_LIBS $ac_cv_search_png_get_libpng_ver"
PNG_INCLUDES="$PNG_INCLUDES -DWEBP_HAVE_PNG"
AC_DEFINE(WEBP_HAVE_PNG, [1],
[Set to 1 if PNG library is installed])
png_support=yes
],
[AC_MSG_WARN(Optional png library not found)
PNG_LIBS=""
PNG_INCLUDES=""
],
[$MATH_LIBS]),
[AC_MSG_WARN(png library not available - no png.h)
PNG_LIBS=""
PNG_INCLUDES=""
],
)
LIBCHECK_EPILOGUE([PNG])
])
dnl === check for JPEG support ===
AC_ARG_ENABLE([jpeg],
AS_HELP_STRING([--disable-jpeg],
[Disable detection of JPEG format support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_jpeg" != "xno"], [
CLEAR_LIBVARS([JPEG])
WITHLIB_OPTION([jpeg], [JPEG])
LIBCHECK_PROLOGUE([JPEG])
AC_CHECK_HEADER(jpeglib.h,
AC_CHECK_LIB(jpeg, jpeg_set_defaults,
[JPEG_LIBS="$JPEG_LIBS -ljpeg"
JPEG_INCLUDES="$JPEG_INCLUDES -DWEBP_HAVE_JPEG"
AC_DEFINE(WEBP_HAVE_JPEG, [1],
[Set to 1 if JPEG library is installed])
jpeg_support=yes
],
AC_MSG_WARN(Optional jpeg library not found),
[$MATH_LIBS]),
AC_MSG_WARN(jpeg library not available - no jpeglib.h)
)
LIBCHECK_EPILOGUE([JPEG])
])
dnl === check for TIFF support ===
AC_ARG_ENABLE([tiff],
AS_HELP_STRING([--disable-tiff],
[Disable detection of TIFF format support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_tiff" != "xno"], [
CLEAR_LIBVARS([TIFF])
WITHLIB_OPTION([tiff], [TIFF])
LIBCHECK_PROLOGUE([TIFF])
AC_CHECK_HEADER(tiffio.h,
AC_CHECK_LIB(tiff, TIFFGetVersion,
[TIFF_LIBS="$TIFF_LIBS -ltiff"
TIFF_INCLUDES="$TIFF_INCLUDES -DWEBP_HAVE_TIFF"
AC_DEFINE(WEBP_HAVE_TIFF, [1],
[Set to 1 if TIFF library is installed])
tiff_support=yes
],
AC_MSG_WARN(Optional tiff library not found),
[$MATH_LIBS]),
AC_MSG_WARN(tiff library not available - no tiffio.h)
)
LIBCHECK_EPILOGUE([TIFF])
])
dnl === check for GIF support ===
AC_ARG_ENABLE([gif], AS_HELP_STRING([--disable-gif],
[Disable detection of GIF format support
@<:@default=auto@:>@]))
AS_IF([test "x$enable_gif" != "xno"], [
CLEAR_LIBVARS([GIF])
WITHLIB_OPTION([gif], [GIF])
LIBCHECK_PROLOGUE([GIF])
AC_CHECK_HEADER(gif_lib.h,
AC_CHECK_LIB([gif], [DGifOpenFileHandle],
[GIF_LIBS="$GIF_LIBS -lgif"
AC_DEFINE(WEBP_HAVE_GIF, [1],
[Set to 1 if GIF library is installed])
gif_support=yes
],
AC_MSG_WARN(Optional gif library not found),
[$MATH_LIBS]),
AC_MSG_WARN(gif library not available - no gif_lib.h)
)
LIBCHECK_EPILOGUE([GIF])
if test "$gif_support" = "yes" -a \
"$enable_libwebpdemux" = "yes"; then
build_anim_diff=yes
fi
if test "$gif_support" = "yes" -a \
"$enable_libwebpmux" = "yes"; then
build_gif2webp=yes
fi
])
AM_CONDITIONAL([BUILD_ANIMDIFF], [test "${build_anim_diff}" = "yes"])
AM_CONDITIONAL([BUILD_GIF2WEBP], [test "${build_gif2webp}" = "yes"])
if test "$enable_libwebpdemux" = "yes" -a "$enable_libwebpmux" = "yes"; then
build_img2webp=yes
fi
AM_CONDITIONAL([BUILD_IMG2WEBP], [test "${build_img2webp}" = "yes"])
if test "$enable_libwebpmux" = "yes"; then
build_webpinfo=yes
fi
AM_CONDITIONAL([BUILD_WEBPINFO], [test "${build_webpinfo}" = "yes"])
dnl === check for WIC support ===
AC_ARG_ENABLE([wic],
AS_HELP_STRING([--disable-wic],
[Disable Windows Imaging Component (WIC) detection.
@<:@default=auto@:>@]),,
[enable_wic=yes])
case $host_os in
mingw*)
if test "$enable_wic" = "yes"; then
AC_CHECK_HEADERS([wincodec.h shlwapi.h windows.h])
if test "$ac_cv_header_wincodec_h" = "yes"; then
AC_MSG_CHECKING(for Windows Imaging Component support)
SAVED_LIBS=$LIBS
LIBS="-lshlwapi -lole32 $LIBS"
# match include structure from [cd]webp.c
wic_headers="
#define INITGUID
#define CINTERFACE
#define COBJMACROS
#define _WIN32_IE 0x500
#include <shlwapi.h>
#include <windows.h>
#include <wincodec.h>
"
# test for functions from each lib and the GUID is created properly
wic_main="
int main(void) {
CLSID_WICImagingFactory;
CoInitialize(NULL);
SHCreateStreamOnFile(NULL, 0, NULL);
return 0;
}
"
AC_LANG_PUSH(C)
AC_LINK_IFELSE(
[AC_LANG_SOURCE([
$wic_headers
$wic_main])],
[wic_support=yes],
[wic_support=no]
)
AC_LANG_POP
test "$wic_support" = "yes" || LIBS=$SAVED_LIBS
AC_MSG_RESULT(${wic_support-no})
fi
fi
esac
dnl === If --enable-swap-16bit-csp is defined, add -DWEBP_SWAP_16BIT_CSP=1
USE_SWAP_16BIT_CSP=""
AC_MSG_CHECKING(if --enable-swap-16bit-csp option is specified)
AC_ARG_ENABLE([swap-16bit-csp],
AS_HELP_STRING([--enable-swap-16bit-csp],
[Enable byte swap for 16 bit colorspaces]))
if test "$enable_swap_16bit_csp" = "yes"; then
USE_SWAP_16BIT_CSP="-DWEBP_SWAP_16BIT_CSP=1"
fi
AC_MSG_RESULT(${enable_swap_16bit_csp-no})
AC_SUBST(USE_SWAP_16BIT_CSP)
dnl === If --disable-near-lossless is defined, add -DWEBP_NEAR_LOSSLESS=0
AC_DEFINE(WEBP_NEAR_LOSSLESS, [1], [Enable near lossless encoding])
AC_MSG_CHECKING(if --disable-near-lossless option is specified)
AC_ARG_ENABLE([near_lossless],
AS_HELP_STRING([--disable-near-lossless],
[Disable near lossless encoding]),
[], [enable_near_lossless=yes])
if test "$enable_near_lossless" = "no"; then
AC_DEFINE(WEBP_NEAR_LOSSLESS, [0], [Enable near lossless encoding])
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
dnl === Check whether libwebpmux should be built
AC_MSG_CHECKING(whether libwebpmux is to be built)
AC_ARG_ENABLE([libwebpmux],
AS_HELP_STRING([--enable-libwebpmux],
[Build libwebpmux @<:@default=no@:>@]))
AC_MSG_RESULT(${enable_libwebpmux-no})
AM_CONDITIONAL([WANT_MUX], [test "$enable_libwebpmux" = "yes"])
dnl === Check whether libwebpdemux should be built
AC_MSG_CHECKING(whether libwebpdemux is to be built)
AC_ARG_ENABLE([libwebpdemux],
AS_HELP_STRING([--disable-libwebpdemux],
[Disable libwebpdemux @<:@default=no@:>@]),
[], [enable_libwebpdemux=yes])
AC_MSG_RESULT(${enable_libwebpdemux-no})
AM_CONDITIONAL([WANT_DEMUX], [test "$enable_libwebpdemux" = "yes"])
dnl === Check whether decoder library should be built.
AC_MSG_CHECKING(whether decoder library is to be built)
AC_ARG_ENABLE([libwebpdecoder],
AS_HELP_STRING([--enable-libwebpdecoder],
[Build libwebpdecoder @<:@default=no@:>@]))
AC_MSG_RESULT(${enable_libwebpdecoder-no})
AM_CONDITIONAL([BUILD_LIBWEBPDECODER], [test "$enable_libwebpdecoder" = "yes"])
dnl === Check whether libwebpextras should be built
AC_MSG_CHECKING(whether libwebpextras is to be built)
AC_ARG_ENABLE([libwebpextras],
AS_HELP_STRING([--enable-libwebpextras],
[Build libwebpextras @<:@default=no@:>@]))
AC_MSG_RESULT(${enable_libwebpextras-no})
AM_CONDITIONAL([WANT_EXTRAS], [test "$enable_libwebpextras" = "yes"])
dnl =========================
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS([src/webp/config.h])
AC_CONFIG_FILES([Makefile src/Makefile man/Makefile \
examples/Makefile extras/Makefile imageio/Makefile \
src/dec/Makefile src/enc/Makefile src/dsp/Makefile \
src/demux/Makefile src/mux/Makefile \
src/utils/Makefile \
src/libwebp.pc src/libwebpdecoder.pc \
src/demux/libwebpdemux.pc src/mux/libwebpmux.pc])
AC_OUTPUT
AC_MSG_NOTICE([
WebP Configuration Summary
--------------------------
Shared libraries: ${enable_shared}
Static libraries: ${enable_static}
Threading support: ${enable_threading-no}
libwebp: yes
libwebpdecoder: ${enable_libwebpdecoder-no}
libwebpdemux: ${enable_libwebpdemux-no}
libwebpmux: ${enable_libwebpmux-no}
libwebpextras: ${enable_libwebpextras-no}
Tools:
cwebp : ${enable_libwebpdemux-no}
Input format support
====================
JPEG : ${jpeg_support-no}
PNG : ${png_support-no}
TIFF : ${tiff_support-no}
WIC : ${wic_support-no}
dwebp : ${enable_libwebpdemux-no}
Output format support
=====================
PNG : ${png_support-no}
WIC : ${wic_support-no}
GIF support : ${gif_support-no}
anim_diff : ${build_anim_diff-no}
gif2webp : ${build_gif2webp-no}
img2webp : ${build_img2webp-no}
webpmux : ${enable_libwebpmux-no}
vwebp : ${build_vwebp-no}
webpinfo : ${build_webpinfo-no}
SDL support : ${sdl_support-no}
vwebp_sdl : ${build_vwebp_sdl-no}
])