Hi, Could I +1 a request for this to be fixed. I appreciate it is harmless, but it is an annoyance and it is just going to be a source of bug reports forever:-)
If you wish I can author a changeset for this. Regards, Ed. On Wed, 2015-11-04 at 08:49 +0100, Volker Simonis wrote: > Hi Johnathan, > > this is a known problem - at least to me :) > > It is caused by a peculiarity of the gcc version on Ubuntu where "gcc > -dumpversion" doesn't print a micro-version: > > Ubuntu: > $ gcc -dumpversion > 4.6 > > Any other Linux: > $ gcc -dumpversion > 4.8.3 > > This "feature" is tracked under > https://bugs.launchpad.net/ubuntu/+source/gcc-4.8/+bug/1360404 and has > been fixed for gcc 4.9 but won't be fixed for older versions of gcc. > > In hotspot/make/linux/makefiles/gcc.make we parse the micro-version of > gcc and use it in the following way: > > CC_VER_MICRO := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f3) > > ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 1 \& > $(CC_VER_MICRO) = 1), 1) > $(error "GCC $(CC_VER_MAJOR).$(CC_VER_MINOR).$(CC_VER_MICRO) not > supported because of > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27724";) > endif > > The shell expression results in a syntax error if $(CC_VER_MICRO) > because it expaands to something like "expr 4 = 4 & 3 = 1 & = 1" > > I haven't fixed it until now because it does no harm. The > corresponding check is for gcc 4.1.1 but the affected Ubuntu gcc > compilers are 4.6, 4.7 and 4.8. > > A trivial fix would be to set CC_VER_MICRO to "0" by default. > > Regards, > Volker
