OK, I'll prepare a change :)
On Wed, Nov 4, 2015 at 4:45 PM, Edward Nevill <edward.nev...@linaro.org> wrote: > 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 > >
