124 lines
2.9 KiB
Plaintext
124 lines
2.9 KiB
Plaintext
dnl From FIND_MOTIF and ACX_PTHREAD, without much understanding
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dnl
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dnl FIND_JPEG[ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]
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dnl ------------------------------------------------
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dnl
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dnl Find JPEG libraries and headers
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dnl
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dnl Put compile stuff in JPEG_INCLUDES
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dnl Put link stuff in JPEG_LIBS
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dnl Define HAVE_JPEG if found
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dnl
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AC_DEFUN([FIND_JPEG], [
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AC_REQUIRE([AC_PATH_XTRA])
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JPEG_INCLUDES=""
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JPEG_LIBS=""
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AC_ARG_WITH(jpeg,
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AS_HELP_STRING([--without-jpeg], [build without libjpeg (default: test)]))
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# Treat --without-jpeg like --without-jpeg-includes --without-jpeg-libraries.
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if test "$with_jpeg" = "no"; then
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JPEG_INCLUDES=no
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JPEG_LIBS=no
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fi
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AC_ARG_WITH(jpeg-includes,
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AS_HELP_STRING([--with-jpeg-includes=DIR], [libjpeg includes are in DIR]),
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JPEG_INCLUDES="-I$withval")
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AC_ARG_WITH(jpeg-libraries,
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AS_HELP_STRING([--with-jpeg-libraries=DIR], [libjpeg libraries are in DIR]),
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JPEG_LIBS="-L$withval -ljpeg")
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AC_MSG_CHECKING(for JPEG)
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# Look for jpeglib.h
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if test "$JPEG_INCLUDES" = ""; then
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# Check the standard search path
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AC_TRY_COMPILE([#include <stdio.h>
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#include <jpeglib.h>],[int a;],[
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JPEG_INCLUDES=""
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], [
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# jpeglib.h is not in the standard search path, try
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# $prefix
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jpeg_save_CFLAGS="$CFLAGS"
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CFLAGS="-I${prefix}/include $CFLAGS"
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AC_TRY_COMPILE([#include <stdio.h>
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#include <jpeglib.h>],[int a;],[
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JPEG_INCLUDES="-I${prefix}/include"
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], [
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JPEG_INCLUDES="no"
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])
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CFLAGS=$jpeg_save_CFLAGS
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])
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fi
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# Now for the libraries
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if test "$JPEG_LIBS" = ""; then
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jpeg_save_LIBS="$LIBS"
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jpeg_save_CFLAGS="$CFLAGS"
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LIBS="-ljpeg $LIBS"
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CFLAGS="$JPEG_INCLUDES $CFLAGS"
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# Try the standard search path first
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AC_TRY_LINK([#include <stdio.h>
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#include <jpeglib.h>
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],[jpeg_abort((void*)0)], [
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JPEG_LIBS="-ljpeg"
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], [
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# libjpeg is not in the standard search path, try $prefix
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LIBS="-L${prefix}/lib $LIBS"
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AC_TRY_LINK([#include <stdio.h>
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#include <jpeg.h>
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],[jpeg_abort((void*)0)], [
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JPEG_LIBS="-L${prefix}/lib -ljpeg"
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], [
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JPEG_LIBS=no
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])
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])
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LIBS="$jpeg_save_LIBS"
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CFLAGS="$jpeg_save_CFLAGS"
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fi
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AC_SUBST(JPEG_LIBS)
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AC_SUBST(JPEG_INCLUDES)
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# Print a helpful message
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jpeg_libraries_result="$JPEG_LIBS"
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jpeg_includes_result="$JPEG_INCLUDES"
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if test x"$jpeg_libraries_result" = x""; then
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jpeg_libraries_result="in default path"
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fi
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if test x"$jpeg_includes_result" = x""; then
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jpeg_includes_result="in default path"
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fi
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if test "$jpeg_libraries_result" = "no"; then
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jpeg_libraries_result="(none)"
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fi
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if test "$jpeg_includes_result" = "no"; then
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jpeg_includes_result="(none)"
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fi
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AC_MSG_RESULT([libraries $jpeg_libraries_result, headers $jpeg_includes_result])
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test "$JPEG_INCLUDES" != "no" && test "$JPEG_LIBS" != "no"; then
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AC_DEFINE(HAVE_JPEG,1,[Define if you have jpeg libraries and header files.])
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$1
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else
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JPEG_INCLUDES=""
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JPEG_LIBS=""
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$2
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fi
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])dnl
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