1 dnl This Source Code Form is subject to the terms of the Mozilla Public
2 dnl License, v. 2.0. If a copy of the MPL was not distributed with this
3 dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
5 dnl Usage: MOZ_ZLIB_CHECK([version])
7 AC_DEFUN([MOZ_ZLIB_CHECK],
12 MOZ_ARG_WITH_STRING(system-zlib,
13 [ --with-system-zlib[=PFX]
14 Use system libz [installed at prefix PFX]],
17 if test -z "$MOZ_ZLIB_LIBS$MOZ_ZLIB_CFLAGS$SKIP_LIBRARY_CHECKS"; then
19 _SAVE_LDFLAGS=$LDFLAGS
22 if test -n "${ZLIB_DIR}" -a "${ZLIB_DIR}" != "yes"; then
23 MOZ_ZLIB_CFLAGS="-I${ZLIB_DIR}/include"
24 MOZ_ZLIB_LIBS="-L${ZLIB_DIR}/lib"
25 CFLAGS="$MOZ_ZLIB_CFLAGS $CFLAGS"
26 LDFLAGS="$MOZ_ZLIB_LIBS $LDFLAGS"
28 if test -z "$ZLIB_DIR" -o "$ZLIB_DIR" = no; then
31 AC_CHECK_LIB(z, gzread, [MOZ_NATIVE_ZLIB=1 MOZ_ZLIB_LIBS="$MOZ_ZLIB_LIBS -lz"],
33 if test "$MOZ_NATIVE_ZLIB" = 1; then
34 MOZZLIBNUM=`echo $MOZZLIB | awk -F. changequote(<<, >>)'{printf "0x%x\n", (((<<$>>1 * 16 + <<$>>2) * 16) + <<$>>3) * 16 + <<$>>4}'changequote([, ])`
35 AC_TRY_COMPILE([ #include <stdio.h>
38 [ #if ZLIB_VERNUM < $MOZZLIBNUM
39 #error "Insufficient zlib version ($MOZZLIBNUM required)."
42 AC_MSG_ERROR([Insufficient zlib version for --with-system-zlib ($MOZZLIB required)]))
46 LDFLAGS=$_SAVE_LDFLAGS
50 AC_SUBST(MOZ_ZLIB_CFLAGS)
51 AC_SUBST_LIST(MOZ_ZLIB_LIBS)
52 AC_SUBST(MOZ_NATIVE_ZLIB)