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-rw-r--r--erts/configure.in46
1 files changed, 33 insertions, 13 deletions
diff --git a/erts/configure.in b/erts/configure.in
index cf21d0cbfc..c992fb5bd9 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1372,24 +1372,44 @@ dnl -------------
dnl zlib
dnl -------------
-AC_ARG_ENABLE(shared-zlib,
-AS_HELP_STRING([--enable-shared-zlib], [enable using shared zlib library]),
-[ case "$enableval" in
- no) enable_shared_zlib=no ;;
- *) enable_shared_zlib=yes ;;
- esac ], enable_shared_zlib=no)
+AC_ARG_ENABLE(builtin-zlib,
+ AS_HELP_STRING([--enable-builtin-zlib],
+ [force use of our own built-in zlib]),
+ [ case "$enableval" in
+ no) enable_builtin_zlib=no ;;
+ *) enable_builtin_zlib=yes ;;
+ esac ], enable_builtin_zlib=no)
Z_LIB=
-if test "x$enable_shared_zlib" = "xyes" ; then
- AC_CHECK_LIB(z, adler32_combine,
- [Z_LIB="-lz"
- AC_DEFINE(HAVE_LIBZ, 1, [Define to 1 if you have the `z' library (-lz).])],
- [AC_MSG_ERROR([cannot find any shared zlib])])
+if test "x$enable_builtin_zlib" = "xyes"; then
+ AC_MSG_NOTICE([Using our own built-in zlib source])
else
- AC_MSG_NOTICE([Using own zlib source])
+AC_MSG_CHECKING(for zlib 1.2.5 or higher)
+zlib_save_LIBS=$LIBS
+LIBS="-lz $LIBS"
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include "zlib.h"
+]],[[
+#if ZLIB_VERNUM >= 0x1250
+ Bytef s[1];
+ s[0] = 0;
+ (void) adler32((uLong)0, s, 1);
+#else
+#error "No zlib 1.2.5 or higher found"
+error
+#endif
+]])],
+[
+ Z_LIB="-lz"
+ AC_DEFINE(HAVE_LIBZ, 1, [Define to 1 if you have the `z' library (-lz).])
+ AC_MSG_RESULT(yes)
+],[
+ AC_MSG_RESULT(no)
+])
+LIBS=$zlib_save_LIBS
fi
-
AC_SUBST(Z_LIB)
dnl