Description: Enforce -lpthread when linking nxcomp. Author: Mike Gabriel Abstract: This is a workaround for a nasty libtool bug!!! . We actually compile libXcomp with pthread support, but libtool uses g++ ... -nostdlib ... -pthread on Linux. -nostdlib causes -pthread to be ignored. . According to GCC upstream, this is not a bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460 . GCC upstream insists that libtool needs to handle -pthread in a special way when using -nostdlib. . A patch has been submitted to the libtool project: http://lists.gnu.org/archive/html/libtool-patches/2013-11/msg00015.html but never applied to the code base. Boo. . We will work around this bug by hard-coding the linking with pthread support in libXcomp for now. --- a/nxcomp/src/Makefile.am +++ b/nxcomp/src/Makefile.am @@ -139,7 +139,7 @@ libXcomp_la_LDFLAGS = \ -version-number @LT_COMP_VERSION@ \ -no-undefined \ - $(PTHREAD_LDFLAGS) \ + $(PTHREAD_LDFLAGS) -lpthread \ $(NULL) libXcompincludedir = $(includedir)/nx