[Buildroot] [PATCH 1/1] package/json-for-modern-cpp: enable multiple headers by default

[Dimitrij Kotrev]

json-for-modern-cpp provides an option to enable multiple headers support.
Currently this option is disabled and the package creates just a
single header: "nlohmann/json.hpp", which contains everything. Enabling
this option, splits this single header into multiple ones. First of all
this provides an additional header: "nlohmann/json_fwd.hpp", which contains
only forwarding declarations of types provided by this library. This
gives you a more finer control over include dependencies and can speed up
build times significantly. The top level header: "nlohmann/json.hpp" is
still there and therefore code which used it before, would stay compatible.

Signed-off-by: Dimitrij Kotrev <dimitrij.kotrev at googlemail.com>
---
 package/json-for-modern-cpp/json-for-modern-cpp.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/json-for-modern-cpp/json-for-modern-cpp.mk b/package/json-for-modern-cpp/json-for-modern-cpp.mk
index 6e21723fd4..94cdc909f3 100644
--- a/package/json-for-modern-cpp/json-for-modern-cpp.mk
+++ b/package/json-for-modern-cpp/json-for-modern-cpp.mk
@@ -12,6 +12,6 @@ JSON_FOR_MODERN_CPP_LICENSE_FILES = LICENSE.MIT
 JSON_FOR_MODERN_CPP_INSTALL_STAGING = YES
 # header only library
 JSON_FOR_MODERN_CPP_INSTALL_TARGET = NO
-JSON_FOR_MODERN_CPP_CONF_OPTS = -DJSON_BuildTests=OFF
+JSON_FOR_MODERN_CPP_CONF_OPTS = -DJSON_BuildTests=OFF -DJSON_MultipleHeaders=ON
 
 $(eval $(cmake-package))
-- 
2.30.2