[packages] restund: infer SYSROOT from cross cpp, same fix as for "re"

git-svn-id: svn://svn.openwrt.org/openwrt/packages@29800 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/net/restund/Makefile b/net/restund/Makefile
index 4c5d972..551eac0 100644 (file)
--- a/net/restund/Makefile
+++ b/net/restund/Makefile
@@ -51,7 +51,7 @@ define Build/Compile
                CC="$(TARGET_CC)" \
                EXTRA_CFLAGS="$(TARGET_CFLAGS)" \
                DESTDIR="$(PKG_INSTALL_DIR)" \
-               SYSROOT="$(TOOLCHAIN_DIR)" \
+               SYSROOT="$$$$(echo '#include <pthread.h>' | $(TARGET_CROSS)cpp -x c | sed -ne 's,^# [0-9]* \"\(.*\)/include/pthread\.h\".*,\1,p' | head -n1)" \
                SYSROOT_ALT="$(STAGING_DIR)/usr" \
                RELEASE=1 \
                CROSS_COMPILE="$(TARGET_CROSS)" \