Pass -std=c++11 when compiling files that include the ICU headers. Without this flag, compilation fails and causes Boost's build system to remove ICU support. Note that $(pkg-config --variable=CXXFLAGS icu-uc) includes "-std=c++11", but Boost's build system does not use 'pkg-config'. --- boost_1_66_0/libs/locale/build/Jamfile.v2.orig 2017-12-13 18:56:44.000000000 -0500 +++ boost_1_66_0/libs/locale/build/Jamfile.v2 2018-04-08 15:18:58.673025760 -0400 @@ -65,8 +65,8 @@ if $(ICU_LINK) { - ICU_OPTS = <include>$(ICU_PATH)/include <linkflags>$(ICU_LINK) <dll-path>$(ICU_PATH)/bin <runtime-link>shared ; - ICU64_OPTS = <include>$(ICU_PATH)/include <linkflags>$(ICU_LINK) <dll-path>$(ICU_PATH)/bin64 <runtime-link>shared ; + ICU_OPTS = <include>$(ICU_PATH)/include <cxxflags>-std=c++11 <linkflags>$(ICU_LINK) <dll-path>$(ICU_PATH)/bin <runtime-link>shared ; + ICU64_OPTS = <include>$(ICU_PATH)/include <cxxflags>-std=c++11 <linkflags>$(ICU_LINK) <dll-path>$(ICU_PATH)/bin64 <runtime-link>shared ; } else { @@ -121,6 +121,7 @@ explicit icuuc icudt icuin ; ICU_OPTS = <include>$(ICU_PATH)/include + <cxxflags>-std=c++11 <library>icuuc/<link>shared/<runtime-link>shared <library>icudt/<link>shared/<runtime-link>shared <library>icuin/<link>shared/<runtime-link>shared @@ -180,6 +181,7 @@ explicit icuuc_64 icudt_64 icuin_64 ; ICU64_OPTS = <include>$(ICU_PATH)/include + <cxxflags>-std=c++11 <library>icuuc_64/<link>shared/<runtime-link>shared <library>icudt_64/<link>shared/<runtime-link>shared <library>icuin_64/<link>shared/<runtime-link>shared --- boost_1_66_0/libs/regex/build/Jamfile.v2.orig 2017-12-13 18:56:48.000000000 -0500 +++ boost_1_66_0/libs/regex/build/Jamfile.v2 2018-04-08 15:20:40.865532505 -0400 @@ -44,7 +44,7 @@ if $(ICU_LINK) { - ICU_OPTS = <include>$(ICU_PATH)/include <linkflags>$(ICU_LINK) <dll-path>$(ICU_PATH)/bin <define>BOOST_HAS_ICU=1 <runtime-link>shared ; + ICU_OPTS = <include>$(ICU_PATH)/include <cxxflags>-std=c++11 <linkflags>$(ICU_LINK) <dll-path>$(ICU_PATH)/bin <define>BOOST_HAS_ICU=1 <runtime-link>shared ; } else { @@ -78,6 +78,7 @@ ICU_OPTS = <include>$(ICU_PATH)/include + <cxxflags>-std=c++11 <runtime-link>shared:<library>icuuc/<link>shared <runtime-link>shared:<library>icudt/<link>shared <runtime-link>shared:<library>icuin/<link>shared