AC_INIT([libwebp], [0.3.0], [http://code.google.com/p/webp/issues],, [http://developers.google.com/speed/webp]) AC_CANONICAL_TARGET 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 AM_PROG_CC_C_O dnl === Enable less verbose output when building. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) 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], [$enableval]) SET_IF_UNSET([enable_libwebpmux], [$enableval])]) 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(flag) dnl === Checks whether $CC supports 'flag' and adds it to AM_CFLAGS on success. AC_DEFUN([TEST_AND_ADD_CFLAGS], [SAVED_CFLAGS="$CFLAGS" CFLAGS="-Werror $1" AC_MSG_CHECKING([whether $CC supports $1]) dnl Note AC_LANG_PROGRAM([]) uses an old-style main definition. AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) { return 0; }])], [AC_MSG_RESULT([yes])] dnl Simply append the variable avoiding a dnl compatibility ifdef for AS_VAR_APPEND as this dnl variable shouldn't grow all that large. [AM_CFLAGS="$AM_CFLAGS $1"], [AC_MSG_RESULT([no])]) CFLAGS="$SAVED_CFLAGS"]) TEST_AND_ADD_CFLAGS([-Wall]) TEST_AND_ADD_CFLAGS([-Wdeclaration-after-statement]) TEST_AND_ADD_CFLAGS([-Wextra]) TEST_AND_ADD_CFLAGS([-Wmissing-declarations]) TEST_AND_ADD_CFLAGS([-Wmissing-prototypes]) TEST_AND_ADD_CFLAGS([-Wold-style-definition]) TEST_AND_ADD_CFLAGS([-Wshadow]) TEST_AND_ADD_CFLAGS([-Wunused-but-set-variable]) TEST_AND_ADD_CFLAGS([-Wunused]) TEST_AND_ADD_CFLAGS([-Wvla]) AC_SUBST([AM_CFLAGS]) 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=$SAVED_LIBS]) dnl === Check for pthread support AC_ARG_ENABLE([threading], AS_HELP_STRING([--disable-threading], [Disable detection of thread support]),, [enable_threading=yes]) if test "$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" ], [enable_threading=no]) fi AC_MSG_NOTICE([checking if threading is enabled... ${enable_threading-no}]) dnl === check for OpenGL/GLUT support === 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]) LIBS="$GL_SAVED_LIBS" # A direct link to libGL may not be necessary on e.g., linux. for lib in "" $ac_cv_search_glBegin; do unset ac_cv_search_glutMainLoop AC_SEARCH_LIBS([glutMainLoop], [glut], [glut_support=yes], [], [$lib]) if test "$glut_support" = "yes"; then GL_LIBS="$LDFLAGS" if test "$ac_cv_search_glutMainLoop" != "none required"; then GL_LIBS="$GL_LIBS $ac_cv_search_glutMainLoop" fi GL_LIBS="$GL_LIBS $lib" break fi done LDFLAGS="$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 "$build_vwebp" = "yes"]) dnl === check for PNG support === CLEAR_LIBVARS([PNG]) AC_PATH_PROGS(LIBPNG_CONFIG, [libpng-config libpng15-config libpng14-config libpng12-config]) if test -n "$LIBPNG_CONFIG"; then PNG_INCLUDES=`$LIBPNG_CONFIG --cflags` PNG_PREFIX=`$LIBPNG_CONFIG --prefix` if test "${PNG_PREFIX}/lib" != "/usr/lib" ; then PNG_LIBS="-L${PNG_PREFIX}/lib" fi PNG_LIBS="$PNG_LIBS `$LIBPNG_CONFIG --libs`" 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="" ], [$MATH_LIBS]), [AC_MSG_WARN(png library not available - no png.h) PNG_LIBS="" PNG_INCLUDES="" ], ) LIBCHECK_EPILOGUE([PNG]) dnl === check for JPEG support === CLEAR_LIBVARS([JPEG]) WITHLIB_OPTION([jpeg], [JPEG]) LIBCHECK_PROLOGUE([JPEG]) AC_CHECK_HEADER(jpeglib.h, AC_CHECK_LIB(jpeg, jpeg_set_defaults, [JPEG_LIBS="$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 === 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), [$MATH_LIBS]), AC_MSG_WARN(tiff library not available - no tiffio.h) ) LIBCHECK_EPILOGUE([TIFF]) dnl === check for GIF support === CLEAR_LIBVARS([GIF]) WITHLIB_OPTION([gif], [GIF]) LIBCHECK_PROLOGUE([GIF]) AC_CHECK_HEADER(gif_lib.h, AC_CHECK_LIB([gif], [DGifOpenFileHandle], [GIF_LIBS="$GIF_LIBS -lgif" 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 \ "$enable_libwebpmux" = "yes"; then build_gif2webp=yes fi AM_CONDITIONAL([BUILD_GIF2WEBP], [test "${build_gif2webp}" = "yes"]) dnl === check for WIC support === if test "$target_os" = "mingw32"; then AC_CHECK_HEADERS([wincodec.h shlwapi.h windows.h]) if test "$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 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 ========================= AC_CONFIG_MACRO_DIR([m4]) AC_CONFIG_HEADERS([config.h]) AC_CONFIG_FILES([Makefile src/Makefile man/Makefile \ examples/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} Threaded decode: ${enable_threading-no} libwebp: yes libwebpdecoder: ${enable_libwebpdecoder-no} libwebpdemux: ${enable_libwebpdemux-no} libwebpmux: ${enable_libwebpmux-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} gif2webp : ${build_gif2webp-no} webpmux : ${enable_libwebpmux-no} vwebp : ${build_vwebp-no} ])