118 lines
2.9 KiB
Plaintext
118 lines
2.9 KiB
Plaintext
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dnl From FIND_MOTIF and ACX_PTHREAD, without much understanding
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dnl
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dnl FIND_GIFLIB[ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]
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dnl ---------------------------------------------------
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dnl
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dnl Find GIFLIB libraries and headers
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dnl
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dnl Put compile stuff in GIFLIB_INCLUDES
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dnl Put link stuff in GIFLIB_LIBS
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dnl Define HAVE_GIFLIB if found.
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dnl
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AC_DEFUN([FIND_GIFLIB], [
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AC_REQUIRE([AC_PATH_XTRA])
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GIFLIB_INCLUDES=""
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GIFLIB_LIBS=""
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AC_ARG_WITH(giflib,
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AS_HELP_STRING([--without-giflib], [build without giflib (default: test)]))
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# Treat --without-giflib like --without-giflib-includes --without-giflib-libraries.
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if test "$with_giflib" = "no"; then
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GIFLIB_INCLUDES=no
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GIFLIB_LIBS=no
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fi
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AC_ARG_WITH(giflib-includes,
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AS_HELP_STRING([--with-giflib-includes=DIR], [giflib includes are in DIR]),
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GIFLIB_INCLUDES="-I$withval")
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AC_ARG_WITH(giflib-libraries,
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AS_HELP_STRING([--with-giflib-libraries=DIR], [giflib libraries are in DIR]),
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GIFLIB_LIBS="-L$withval -lgif")
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AC_MSG_CHECKING(for giflib)
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# Look for gif_lib.h
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if test "$GIFLIB_INCLUDES" = ""; then
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# Check the standard search path
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AC_TRY_COMPILE([#include <gif_lib.h>],[int a;],[
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GIFLIB_INCLUDES=""
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], [
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# gif_lib.h is not in the standard search path, try
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# $prefix
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giflib_save_INCLUDES="$INCLUDES"
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INCLUDES="-I${prefix}/include $INCLUDES"
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AC_TRY_COMPILE([#include <gif_lib.h>],[int a;],[
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GIFLIB_INCLUDES="-I${prefix}/include"
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], [
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GIFLIB_INCLUDES="no"
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])
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INCLUDES=$giflib_save_INCLUDES
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])
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fi
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# Now for the libraries
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if test "$GIFLIB_LIBS" = ""; then
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giflib_save_LIBS="$LIBS"
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giflib_save_INCLUDES="$INCLUDES"
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LIBS="-lgif $LIBS"
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INCLUDES="$GIFLIB_INCLUDES $INCLUDES"
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# Try the standard search path first
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AC_TRY_LINK([#include <gif_lib.h>],[DGifSlurp(0)], [
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GIFLIB_LIBS="-lgif"
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], [
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# giflib is not in the standard search path, try $prefix
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LIBS="-L${prefix}/lib $LIBS"
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AC_TRY_LINK([#include <gif_lib.h>],[DGifSlurp(0)], [
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GIFLIB_LIBS="-L${prefix}/lib -lgif"
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], [
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GIFLIB_LIBS=no
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])
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])
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LIBS="$giflib_save_LIBS"
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INCLUDES="$giflib_save_INCLUDES"
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fi
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AC_SUBST(GIFLIB_LIBS)
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AC_SUBST(GIFLIB_INCLUDES)
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# Print a helpful message
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giflib_libraries_result="$GIFLIB_LIBS"
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giflib_includes_result="$GIFLIB_INCLUDES"
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if test x"$giflib_libraries_result" = x""; then
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giflib_libraries_result="in default path"
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fi
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if test x"$giflib_includes_result" = x""; then
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giflib_includes_result="in default path"
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fi
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if test "$giflib_libraries_result" = "no"; then
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giflib_libraries_result="(none)"
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fi
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if test "$giflib_includes_result" = "no"; then
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giflib_includes_result="(none)"
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fi
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AC_MSG_RESULT([libraries $giflib_libraries_result, headers $giflib_includes_result])
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test "$GIFLIB_INCLUDES" != "no" && test "$GIFLIB_LIBS" != "no"; then
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AC_DEFINE(HAVE_GIFLIB,1,[Define if you have giflib libraries and header files.])
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$1
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else
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GIFLIB_INCLUDES=""
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GIFLIB_LIBS=""
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$2
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fi
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])dnl
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