62 lines
1.8 KiB
Plaintext
62 lines
1.8 KiB
Plaintext
dnl Available from the GNU Autoconf Macro Archive at:
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dnl http://www.gnu.org/software/ac-archive/htmldoc/check_zlib.html
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dnl
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AC_DEFUN([CHECK_ZLIB],
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#
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# Handle user hints
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#
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[AC_MSG_CHECKING(if zlib is wanted)
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AC_ARG_WITH(zlib,
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[ --with-zlib=DIR root directory path of zlib installation [defaults to
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/usr/local or /usr if not found in /usr/local]
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--without-zlib to disable zlib usage completely],
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[if test "$withval" != no ; then
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AC_MSG_RESULT(yes)
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ZLIB_HOME="$withval"
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else
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AC_MSG_RESULT(no)
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fi], [
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AC_MSG_RESULT(yes)
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ZLIB_HOME=/usr/local
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if test ! -f "${ZLIB_HOME}/include/zlib.h"
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then
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ZLIB_HOME=/usr
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fi
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])
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#
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# Locate zlib, if wanted
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#
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if test -n "${ZLIB_HOME}"
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then
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ZLIB_OLD_LDFLAGS=$LDFLAGS
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ZLIB_OLD_CPPFLAGS=$LDFLAGS
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LDFLAGS="$LDFLAGS -L${ZLIB_HOME}/lib"
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CPPFLAGS="$CPPFLAGS -I${ZLIB_HOME}/include"
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AC_LANG_SAVE
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AC_LANG_C
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AC_CHECK_LIB(z, inflateEnd, [zlib_cv_libz=yes], [zlib_cv_libz=no])
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AC_CHECK_HEADER(zlib.h, [zlib_cv_zlib_h=yes], [zlib_cvs_zlib_h=no])
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AC_LANG_RESTORE
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if test "$zlib_cv_libz" = "yes" -a "$zlib_cv_zlib_h" = "yes"
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then
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#
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# If both library and header were found, use them
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#
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AC_CHECK_LIB(z, inflateEnd)
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AC_MSG_CHECKING(zlib in ${ZLIB_HOME})
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AC_MSG_RESULT(ok)
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else
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#
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# If either header or library was not found, revert and bomb
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#
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AC_MSG_CHECKING(zlib in ${ZLIB_HOME})
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LDFLAGS="$ZLIB_OLD_LDFLAGS"
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CPPFLAGS="$ZLIB_OLD_CPPFLAGS"
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AC_MSG_RESULT(failed)
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AC_MSG_ERROR(either specify a valid zlib installation with --with-zlib=DIR or disable zlib usage with --without-zlib)
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fi
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fi
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])
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