AC_INIT([libwebp], [0.6.0], [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], [-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], [-Wshadow]) TEST_AND_ADD_CFLAGS([AM_CFLAGS], [-Wshorten-64-to-32]) 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 $LOCAL_NEON_FLAGS" dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition. AC_COMPILE_IFELSE([AC_LANG_SOURCE([ #include int main(void) { int8x8_t v = vdup_n_s8(0); (void)v; return 0; }])], [NEON_FLAGS="$(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])])]) ;; esac AC_SUBST([NEON_FLAGS])]) dnl === CLEAR_LIBVARS([var_pfx]) dnl === Clears _{INCLUDES,LIBS}. AC_DEFUN([CLEAR_LIBVARS], [$1_INCLUDES=""; $1_LIBS=""]) dnl === WITHLIB_OPTION([opt_pfx], [outvar_pfx]) dnl === Defines --with-{include,lib}dir options which set dnl === the variables _{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 _{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 === _{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 () dnl === AC_DEFINE'ing 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="$glut_ldflags|-framework GLUT -framework OpenGL" ;; esac GLUT_SAVED_CPPFLAGS="$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 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_animdiff=yes fi if test "$gif_support" = "yes" -a \ "$enable_libwebpmux" = "yes"; then build_gif2webp=yes fi ]) AM_CONDITIONAL([BUILD_ANIMDIFF], [test "${build_animdiff}" = "yes"]) AM_CONDITIONAL([BUILD_GIF2WEBP], [test "${build_gif2webp}" = "yes"]) if test "$enable_libwebpmux" = "yes"; then build_img2webp=yes fi AM_CONDITIONAL([BUILD_IMG2WEBP], [test "${build_img2webp}" = "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 #include #include " # 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 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 "$enable_swap_16bit_csp" = "yes"; then USE_SWAP_16BIT_CSP="-DWEBP_SWAP_16BIT_CSP" fi AC_MSG_RESULT(${enable_swap_16bit_csp-no}) AC_SUBST(USE_SWAP_16BIT_CSP) dnl === If --enable-experimental is defined, add -DWEBP_EXPERIMENTAL_FEATURES USE_EXPERIMENTAL_CODE="" AC_MSG_CHECKING(if --enable-experimental option is specified) AC_ARG_ENABLE([experimental], AS_HELP_STRING([--enable-experimental], [Activate experimental features])) if test "$enable_experimental" = "yes"; then AC_DEFINE(WEBP_EXPERIMENTAL_FEATURES, [1], [Enable experimental code]) USE_EXPERIMENTAL_CODE="-DWEBP_EXPERIMENTAL_FEATURES" fi AC_MSG_RESULT(${enable_experimental-no}) AC_SUBST(USE_EXPERIMENTAL_CODE) 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([--enable-libwebpdemux], [Build libwebpdemux @<:@default=no@:>@])) 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 : yes Input format support ==================== JPEG : ${jpeg_support-no} PNG : ${png_support-no} TIFF : ${tiff_support-no} WIC : ${wic_support-no} dwebp : yes Output format support ===================== PNG : ${png_support-no} WIC : ${wic_support-no} GIF support : ${gif_support-no} anim_diff : ${build_animdiff-no} gif2webp : ${build_gif2webp-no} img2webp : ${build_img2webp-no} webpmux : ${enable_libwebpmux-no} vwebp : ${build_vwebp-no} ])