$OpenBSD: patch-configure_in,v 1.2 2011/03/02 08:48:16 jasper Exp $
--- configure.in.orig	Mon Mar  1 18:18:59 2010
+++ configure.in	Wed Feb 23 12:29:15 2011
@@ -7,9 +7,6 @@ AC_PREREQ(2.13)
 
 dnl Set our default compilation flags.
 
-CXXFLAGS="-O3 -fno-rtti -fno-exceptions"
-CFLAGS="-O3"
-
 dnl Reset default linking directives.
 
 LIBSTATIC=""
@@ -68,6 +65,7 @@ case "${gcc_version}" in
         ;;
 esac
 
+if false; then
 AC_MSG_CHECKING([whether compiler accepts -Wmissing-declarations])
 gcc_version=`${CC} --version | grep 'gcc (GCC) [[3-4]].' | head -n 1`
 case "${gcc_version}" in
@@ -80,6 +78,7 @@ case "${gcc_version}" in
         CXXFLAGS="$CXXFLAGS -Wmissing-declarations"
         ;;
 esac
+fi
 
 dnl Check for BSD compatible install.
 
@@ -157,6 +156,17 @@ FreeBSD=
 test "$nxconf_cv_freebsd" = yes && FreeBSD=yes])
 nxconf_FreeBSD
 
+dnl Check to see if we're running under OpenBSD.
+
+AC_DEFUN(nxconf_OpenBSD,
+[AC_CACHE_CHECK(for OpenBSD environment, nxconf_cv_openbsd,
+[AC_TRY_COMPILE(,[return __OpenBSD__;],
+nxconf_cv_openbsd=yes, nxconf_cv_openbsd=no)
+rm -f conftest*])
+OpenBSD=
+test "$nxconf_cv_openbsd" = yes && OpenBSD=yes])
+nxconf_OpenBSD
+
 dnl Build PIC libraries.
 
 if test "$CYGWIN32" != yes -a "$DARWIN" != yes; then
@@ -182,6 +192,14 @@ if test "$FreeBSD" = yes; then
   CFLAGS="$CFLAGS -I/usr/local/include"
 fi
 
+dnl On OpenBSD search libraries and includes under /usr/local.
+
+if test "$OpenBSD" = yes; then
+  LIBS="$LIBS -L/usr/local/lib"
+  CXXFLAGS="$CXXFLAGS -Wno-deprecated -I/usr/local/include -I/usr/local/include/libpng"
+  CFLAGS="$CFLAGS -I/usr/local/include"
+fi
+
 dnl Under Darwin we don't have support for -soname option and
 dnl we need the -bundle flag. Under Solaris, instead, we need
 dnl the options -G -h.
@@ -228,7 +246,7 @@ else
 fi
 echo -e "compiling version ${VERSION}"
 
-LIBVERSION=`echo ${VERSION} | cut -d '.' -f 1`
+LIBVERSION=${LIBXcomp_VERSION}
 
 CXXFLAGS="$CXXFLAGS -DVERSION=\\\"${VERSION}\\\""
 CFLAGS="$CFLAGS -DVERSION=\\\"${VERSION}\\\""
@@ -387,7 +405,7 @@ if test "$CYGWIN32" = yes; then
     ALL="\$(LIBCYGARCHIVE) \$(LIBCYGSHARED) \$(LIBARCHIVE)"
     LIBS="-lstdc++ -lpng -ljpeg -lz"
 else
-    ALL="\$(LIBFULL) \$(LIBLOAD) \$(LIBSHARED) \$(LIBARCHIVE)"
+    ALL="\$(LIBSHARED) \$(LIBARCHIVE)"
 fi
 
 AC_OUTPUT(Makefile)