From fe508576ef1f815b22177d7597796886b91ea0c8 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Tue, 22 Mar 2016 10:25:20 +0100 Subject: Sync toplevel with upstream GCC. Signed-off-by: Corinna Vinschen --- config/zlib.m4 | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) (limited to 'config/zlib.m4') diff --git a/config/zlib.m4 b/config/zlib.m4 index b0174994e..afa57d112 100644 --- a/config/zlib.m4 +++ b/config/zlib.m4 @@ -1,18 +1,19 @@ -dnl A function to check for zlib availability. zlib is used by default -dnl unless the user configured with --disable-nls. +dnl A function to check if the system's zlib library should be used. The +dnl builtin zlib dnl is used by default unless the user configured with +dnl --with-system-zlib. AC_DEFUN([AM_ZLIB], [ - # See if the user specified whether he wants zlib support or not. - AC_ARG_WITH(zlib, - [ --with-zlib include zlib support (auto/yes/no) [default=auto]], - [], [with_zlib=auto]) - - if test "$with_zlib" != "no"; then - AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)]) - if test "$with_zlib" = "yes" -a "$ac_cv_header_zlib_h" != "yes"; then - AC_MSG_ERROR([zlib (libz) library was explicitly requested but not found]) - fi + # Use the system's zlib library. + zlibdir="-L\$(top_builddir)/../zlib" + zlibinc="-I\$(top_srcdir)/../zlib" + AC_ARG_WITH(system-zlib, + [AS_HELP_STRING([--with-system-zlib], [use installed libz])], + if test x$with_system_zlib = xyes ; then + zlibdir= + zlibinc= fi + ) + AC_SUBST(zlibdir) + AC_SUBST(zlibinc) ]) - -- cgit v1.2.3