[devel] Don't try to use version-script with cygwin/mingw.
Revised contrib/gregbook to work under cygwin/mingw.
diff --git a/configure.ac b/configure.ac
index 4c383c1..4d89370 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,11 +39,10 @@
AC_PROG_CPP
AC_CHECK_TOOL(SED, sed, :)
AC_CHECK_TOOL(AWK, awk, :)
-AC_LIBTOOL_WIN32_DLL
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
-AC_PROG_LIBTOOL
+LT_INIT([win32-dll])
# Checks for header files.
AC_HEADER_STDC
@@ -65,6 +64,15 @@
AC_SUBST(LIBPNG_DEFINES)
AC_MSG_CHECKING([if libraries can be versioned])
+# Special case for PE/COFF platforms: ld reports
+# support for version-script, but doesn't actually
+# DO anything with it.
+case $host in
+*cygwin* | *mingw32* )
+ have_ld_version_script=no
+ AC_MSG_RESULT(no)
+;;
+* )
GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
if test "$GLD"; then
have_ld_version_script=yes
@@ -74,6 +82,9 @@
AC_MSG_RESULT(no)
AC_MSG_WARN(*** You have not enabled versioned symbols.)
fi
+;;
+esac
+
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
if test "$have_ld_version_script" = "yes"; then