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$NetBSD: patch-configure,v 1.11 2022/04/18 11:03:24 adam Exp $

Portability fix.
Solaris seems to need -std=c99 with recent pkgsrc so keep it.
Add support for Bitrig.

--- configure.orig	2022-04-07 22:41:55.000000000 +0000
+++ configure
@@ -5314,7 +5314,7 @@ rm -f core conftest.err conftest.$ac_obj
 		*-*-cygwin) icu_cv_host_frag=mh-cygwin-msvc ;;
 		esac
 	fi ;;
-*-*-*bsd*|*-*-dragonfly*) 	icu_cv_host_frag=mh-bsd-gcc ;;
+*-*-*bsd*|*-*-dragonfly*|*-*-bitrig*) 	icu_cv_host_frag=mh-bsd-gcc ;;
 *-*-aix*)
 	if test "$GCC" = yes; then
 		icu_cv_host_frag=mh-aix-gcc
@@ -5339,6 +5339,7 @@ rm -f core conftest.err conftest.$ac_obj
 *-dec-osf*) icu_cv_host_frag=mh-alpha-osf ;;
 *-*-nto*)	icu_cv_host_frag=mh-qnx ;;
 *-ncr-*)	icu_cv_host_frag=mh-mpras ;;
+-*-sco3.2v5*)	icu_cv_host_frag=mh-scoosr5 ;;
 *) 		icu_cv_host_frag=mh-unknown ;;
 esac
 
@@ -5947,6 +5948,29 @@ if test "x$plugins" = "xtrue"; then
 fi
 
 
+# check if sys/atomic.h is present.
+for ac_header in sys/atomic.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "sys/atomic.h" "ac_cv_header_sys_atomic_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_atomic_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYS_ATOMIC_H 1
+_ACEOF
+
+fi
+
+done
+
+case "${host}" in
+*-netbsd*)
+if test "x$ac_cv_header_sys_atomic_h" = "xyes"; then
+    CONFIG_CPPFLAGS="$CONFIG_CPPFLAGS -DU_HAVE_NETBSD_ATOMIC_OPS=1";
+fi
+;;
+*)
+;;
+esac
+
 U_ENABLE_DYLOAD=1
 enable=yes
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable dynamic loading of plugins. Ignored if plugins disabled." >&5
@@ -7941,7 +7965,7 @@ ICUDATA_CHAR=$U_ENDIAN_CHAR
 case "${host}" in
 	*-*-solaris*) 	platform=U_SOLARIS ;;
 	*-*-linux*|*-*-gnu|*-*-k*bsd*-gnu|*-*-kopensolaris*-gnu)        platform=U_LINUX ;;
-	*-*-*bsd*|*-*-dragonfly*) 	platform=U_BSD ;;
+	*-*-*bsd*|*-*-dragonfly*|*-*-bitrig*) 	platform=U_BSD ;;
 	*-*-aix*) 	platform=U_AIX ;;
 	*-*-hpux*) 	platform=U_HPUX ;;
 	*-apple-darwin*|*-apple-rhapsody*)	platform=U_DARWIN ;;