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configure: add -stdc++ flag during check for nlohmann-jsoncpp

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See #1858.
This commit is contained in:
Moritz Bunkus 2017-01-24 22:44:58 +01:00
parent 05919681f6
commit f07203fb42
1 changed files with 5 additions and 0 deletions
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5
ac/nlohmann_jsoncpp.m4
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@ -6,6 +6,9 @@ dnl
AC_CACHE_CHECK([nlohmann's json-cpp],[ac_cv_nlohmann_jsoncpp],[
AC_LANG_PUSH(C++)
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$STD_CXX $CXXFLAGS"
AC_TRY_COMPILE([
#include <cstdint>
#include <iostream>
@ -21,6 +24,8 @@ AC_CACHE_CHECK([nlohmann's json-cpp],[ac_cv_nlohmann_jsoncpp],[
std::cout << json.dump();
],[ac_cv_nlohmann_jsoncpp=yes],[ac_cv_nlohmann_jsoncpp=no])
CXXFLAGS="$ac_save_CXXFLAGS"
AC_LANG_POP
])