Hi, I thought it was just me going mad, but a quick glance at http://people.apache.org/~sebor/stdcxx/results/solaris-10-amd64-sunpro-64b-5.8-12S-solaris-553686-log.gz.txt confirms that I'm right.
After configuring as: gmake builddir BUILDMODE=threads,archive,optimized,wide CONFIG=sunpro.config I see command-lines like this: CC -c -mt -D_RWSTD_SOLARIS_THREADS -I$(TOPDIR)/include -I$(BUILDDIR)/include -library=%none -O +w $(TOPDIR)/src/assert.cpp Note that on Solaris CXXFLAGS.wide is supposed to be -xarch=amd64, but this is not being used by the build system. Hunting this down, it seems that sunpro.config expects "uname -p" to return amd64 on 64 bit Solaris/Intel. This is not true, it returns i386. The following patch fixes this for Solaris only - I don't run Sun Studio on Linux, so I don't know if this is broken there or not. Michael Index: etc/config/sunpro.config =================================================================== --- etc/config/sunpro.config (revision 554241) +++ etc/config/sunpro.config (working copy) @@ -89,6 +89,9 @@ else # wide (64-bit) flags -- must be set explicitly # narrow (32-bit) flags are implicit on AMD64 + ifeq ($(OSNAME),SunOS) + arch=$(shell /usr/bin/optisa amd64) + endif ifeq ($(arch),amd64) wide_flags = -xarch=amd64 narrow_flags =