diff --git a/cmake/modules/CheckCXX11Features.cmake b/cmake/modules/CheckCXX11Features.cmake index 3f6b8e2e3ca455f4dfba286170084435cf0521fe..5a3a7b852888fea255d244e8d81bdbc074435e42 100644 --- a/cmake/modules/CheckCXX11Features.cmake +++ b/cmake/modules/CheckCXX11Features.cmake @@ -278,8 +278,16 @@ if(${CMAKE_VERSION} VERSION_LESS "3.1") else() find_package(Threads) endif() -set(STDTHREAD_LINK_FLAGS "${CMAKE_THREAD_LIBS_INIT}" - CACHE STRING "Linker flags needed to get working C++11 threads support") + +# see whether threading needs -no-as-needed +if(EXISTS /etc/dpkg/origins/ubuntu) + set(NO_AS_NEEDED "-Wl,-no-as-needed") +else(EXISTS /etc/dpkg/origins/ubuntu) + set(NO_AS_NEEDED "") +endif(EXISTS /etc/dpkg/origins/ubuntu) + +set(STDTHREAD_LINK_FLAGS "${NO_AS_NEEDED} ${CMAKE_THREAD_LIBS_INIT}" + CACHE STRING "Linker flags needed to get working C++11 threads support. On Ubuntu it may be necessary to include -Wl,-no-as-needed (see FS#1650).") # set linker flags # diff --git a/m4/dune_stdthread.m4 b/m4/dune_stdthread.m4 index 59545bec19c00d5a81e93cd884adc7a7cd691d55..653e02979b865fd82572b34d4bb41a6bc2d64a96 100644 --- a/m4/dune_stdthread.m4 +++ b/m4/dune_stdthread.m4 @@ -4,12 +4,13 @@ AC_DEFUN([DUNE_STDTHREAD],[ AC_REQUIRE([ACX_PTHREAD]) + AC_REQUIRE([DUNE_NO_AS_NEEDED]) AC_CACHE_CHECK([libraries needed for std::thread], [dune_cv_stdthread_libs], [dune_cv_stdthread_libs=$PTHREAD_LIBS]) AC_CACHE_CHECK([linker flags needed for std::thread], [dune_cv_stdthread_ldflags], - [dune_cv_stdthread_ldflags=$PTHREAD_CFLAGS]) + [dune_cv_stdthread_ldflags="$NO_AS_NEEDED $PTHREAD_CFLAGS"]) AC_CACHE_CHECK([compiler flags needed for std::thread], [dune_cv_stdthread_cppflags], [dune_cv_stdthread_cppflags=$PTHREAD_CFLAGS]) @@ -58,3 +59,13 @@ AC_DEFUN([DUNE_STDTHREAD_TESTPROG], [dnl t.join(); ]])dnl ]) + +AC_DEFUN([DUNE_NO_AS_NEEDED], [dnl + AC_CACHE_CHECK([whether the linker needs -Wl,-no-as-needed], + [dune_cv_no_as_needed], + [AS_IF([test -f /etc/dpkg/origins/ubuntu], [dune_cv_no_as_needed="yes (Ubuntu)"], + [dune_cv_no_as_needed="no"])]) + AS_CASE([$dune_cv_no_as_needed], + [yes|"yes "*], [NO_AS_NEEDED=-Wl,-no-as-needed], + [NO_AS_NEEDED=]) +])