configure.in

基于SDL的framegrabber适用于简单的UI下的webcam应用开发

dnl Process this file with autoconf to produce a configure script.
AC_INIT(TestVideo.c)

dnl Setup for automake
AM_INIT_AUTOMAKE(TestVideo, 1.0)

dnl SDL version required
SDL_VERSION=1.2.0

dnl Setup for automake

dnl Detect the canonical host and target build environment
AC_CANONICAL_HOST
AC_CANONICAL_TARGET

dnl Check for compilers
AC_LIBTOOL_WIN32_DLL
AM_PROG_LIBTOOL
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CXX
AC_PROG_INSTALL

dnl Check for compiler environment
AC_C_CONST

dnl Set for C compiler by default
AC_LANG_C

dnl Setup target flagsw
case "$target" in
    *-*-cygwin* | *-*-mingw32*)
	CFLAGS="$CFLAGS -DWIN32"
        if test "$build" != "$target"; then # cross-compiling
            ac_default_prefix=/usr/local/cross-tools/i386-mingw32msvc
        fi
        ;;
    *)
	dnl nothing to do
        ;;
esac

dnl Figure out which math library to use
case "$target" in
    *-*-cygwin* | *-*-mingw32*)
        MATHLIB=""
        ;;
    *-*-beos*)
        MATHLIB=""
        ;;
    *-*-darwin*)
        MATHLIB=""
        ;;
    *-*-aix*)
	MATHLIB="-lm"
        if test x$ac_cv_prog_gcc = xyes; then
            CFLAGS="-mthreads"
	fi
        ;;
    *)
        MATHLIB="-lm"
        ;;
esac
AC_SUBST(MATHLIB)
LIBS="$LIBS $MATHLIB"

dnl Check for SDL
AM_PATH_SDL($SDL_VERSION,
            :,
	    AC_MSG_ERROR([*** SDL version $SDL_VERSION not found!])
)
CFLAGS="$CFLAGS $SDL_CFLAGS"
LIBS="$LIBS $SDL_LIBS"

dnl Check for the SDL_bgrab lib
have_sdlbgrab=no
AC_CHECK_LIB(SDL_bgrab, bgrabOpen , have_sdlbgrab=yes)
if test x$have_sdlbgrab = xyes; then
    LIBS="$LIBS -lSDL_bgrab"
else
    AC_MSG_ERROR([
*** Unable to find SDL_bgrab library
])
fi

# Finally create all the generated files
AC_OUTPUT([Makefile])