[openwrt/openwrt] gperf: build as C++11

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/39f595d1d85099233e96e4531f583200e0df8438

commit 39f595d1d85099233e96e4531f583200e0df8438
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Sat Apr 27 14:57:50 2024 -0700

    gperf: build as C++11
    
    Newer compilers default to building with C++17 as default, which has the
    register keyword removed and thus errors.
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 package/devel/gperf/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/package/devel/gperf/Makefile b/package/devel/gperf/Makefile
index f0f794ee2d..9cf4dbc02b 100644
--- a/package/devel/gperf/Makefile
+++ b/package/devel/gperf/Makefile
@@ -17,6 +17,8 @@ include $(INCLUDE_DIR)/package.mk
 HOST_CPPFLAGS:=-I$(HOST_BUILD_DIR)/lib -I$(HOST_BUILD_DIR)/src $(HOST_CPPFLAGS)
 TARGET_CPPFLAGS:=-I$(PKG_BUILD_DIR)/lib -I$(PKG_BUILD_DIR)/src $(TARGET_CPPFLAGS)
 
+HOST_CXXFLAGS += -std=c++11
+
 define Package/gperf
   SECTION:=devel
   CATEGORY:=Development